The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-16-2002, 08:53 PM   #1
lukecp
Formerly yellow72custom
 
lukecp's Avatar
 
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
Post 700R4 ?'s

I am once again considering making a serious modification to my truck. Right now i have a TH350. This would be adding a 700R4 automatic tranny, out of a '88 up GM car/truck. I have several questions:
1.How much will i have to shorten the driveshaft, and how much will i have to move back the tranny crossmember.
2.Will i have to modify the tranny crossmember to bolt a 700r4 to it?
3.Will my stock collum shifter work?
4.Will the 700r4 speedometer drive work with my speedometer?
5.Which would be better, a lockup converter or a non-lockup converter?
6.How much of a jump in MPG should i expect? I get 10-12 right now with 3.07:1 ratio gears.


------------------
Lucas

"Another proud owner of one of the coolest trucks ever built"

drop_shift@hotmail.com

My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, roughly 300 HP thanks to a 204/214 duration cam, Edelbrock Performer intake and 1406 carb, headers, and 40 seires Flowmaster mufflers. Ochre with a white top. Lots of fun .

__________________
'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride.
'70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck.
'97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg
lukecp is offline   Reply With Quote
Old 05-16-2002, 09:58 PM   #2
slam33
Registered User
 
slam33's Avatar
 
Join Date: Aug 2001
Location: Long Beach, Ca
Posts: 1,432
Post

Let me ask you somthing here, how much are you going to spend on the trans. I have both trannys and have decided that I can build a very strong 350, probably more reliable than the 700, and slap a Gear Vendors overdrive unit behind it. The overdrive will run me about $1200 but it was going to run me close to that to do a 700. The 700 is about 2 inches longer and you need to relocate the crossmember. The GV overdrive is about 11 inches and bolts in place of the tail housing, that gives me about 5 inches longer than a standard 350. Now I can go to a one piece drive shaft without any problems. Just a thought

------------------
71 basic C-10 350. The only option is the rust.No nothing on it, but thats all about to change. <A HREF="http://www.geocities.com/stevemau/slam33page.html?1004806705410

" TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410

</A>
__________________
71 LWB 350/350still working on it but it's going tp be sweet. www.geocities.com/stevemau/slam33page.html

" TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410

</A>
slam33 is offline   Reply With Quote
Old 05-16-2002, 10:08 PM   #3
Longhorn Man
its all about the +6 inches
 
Longhorn Man's Avatar
 
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
Post

That's how I would do it myself too. The 700 is ok in stocl low power situations. If you are pushing any more than 350 horses, I would not think about it onless your have a bunch of $$ to dump into it.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
E-mail longhornmail@yahoo.com
My name is Andy...not Randy...I'm in Ohio...Not Illinois...close enough?
Columbus Ohio


Longhorn Man is offline   Reply With Quote
Old 05-16-2002, 10:14 PM   #4
Andy4639
Old member
 
Andy4639's Avatar
 
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
Cool

700-R4 are probably one of the best up grades I have done to my 71. It has the lock up converter and I wouldn't have it if it didn't, why spend the time and money if you are not wanting it to lock up in overdrive.
All these post about they don't hold up must because they didn't have them built right. I have had my 87 700-R4 since 89 and it has over 100,000 miles on it and have had NO probablems with it. I did put the upgrades in it when I bought it, and had the lock up put in it also before I installed it.
Ok the post before mine said he could build the 350-th and add the gear drive overdrive to it. The 350 is free are what? The overdrive is $1200 alone, I have less than that in everything it took to install my 700-R4, and that includes the cost of the trans., cutting the drive shaft rebalancing it, and it had to be calibrated to the speed odomter. I can't ask for a better transmission and I have drove this truck every where that I have worked in the past 15 years. I work all over NC, and SC.
Hope this helps

------------------
Andy
71's Are for ever!!! or 67,68,69,70,72
71,factory tach,tilt for straight drive,gauges,ac,speed warning,clock,305 HO TPI with 700-R4, lowered 2" & 3" ,and 17" Chrome Stealth wheels, Pioneer reciever,100 watt amp, 6 disc changer, 2-10" subs (behind seat) 2-6x9 in doors, 2-3ways mounted under seat, and 2 tweaters on door panels

www.geocities.com/chevy71tpi/main.html

www.picturetrail.com/Andy4639




__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71


Upstate SC GM Truck Club
2013,14 and 2016 Hot Rod Pour Tour


http://upstategmtrucks.com/



Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
Andy4639 is offline   Reply With Quote
Old 05-16-2002, 10:31 PM   #5
slam33
Registered User
 
slam33's Avatar
 
Join Date: Aug 2001
Location: Long Beach, Ca
Posts: 1,432
Post

I'm not saying the 700 isn't a good trans but The combo I'm going to will be much stronger than the 700. Like I said I have both trannys on my bench. The 350 is a 4x4 that I'm coverting to 2x4, it's already setup for more cluches and it's going to run me around 3 to build it right. The cost for the whole job with a 4 inch alluminum tube driveshaft is going to run me around $1900. Thats for the best of the best as far as the parts go. The 700, after I get it back from Art Carr and then redoing the 2 piece shaft (cutting and rebalancing) will run $1800. I may not get lock up but I can push 500 ft lbs through it and never worry about it. That comes from the trans guru's. I may be overdoing it a bit but when I put it in I don't want to look at it again.

------------------
71 basic C-10 350. The only option is the rust.No nothing on it, but thats all about to change. <A HREF="http://www.geocities.com/stevemau/slam33page.html?1004806705410

" TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410

</A>
__________________
71 LWB 350/350still working on it but it's going tp be sweet. www.geocities.com/stevemau/slam33page.html

" TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410

</A>
slam33 is offline   Reply With Quote
Old 05-16-2002, 10:35 PM   #6
Mike C
Registered User
 
Mike C's Avatar
 
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,709
Post

Overdrive by itself doesn't solve all of your problems. The lock up converter is the difference, and the low first gear. I'd do a built 700 before the Gear Vendors, and if I was going all out, a 4L80e. The gear vendors does nothing about the crappy first gear of a TH350 or TH400, but the 700 does, even better than the 4L80.

------------------
70 GMC 3/4 ton Sierra Grande 402/TH400
72 Jimmy 4WD 4spd 4" & 35's
64 Corvette Coupe
68 Camaro 'vert TPI & TH700
69 Z/28 355 12.6's @110
72 Datsun 240Z-ol' reliable




[This message has been edited by Mike C (edited May 16, 2002).]
__________________
44 Willys MB
52 M38A1
64 Corvette Coupe
68 Camaro 'vert LT1 & TH700
69 Z/28 355 12.6's @110
69 Chevy Short Step 4 1/2"/7" drop
72 Jimmy 4WD 4spd 4" & 35's
02 GMC 2500HD 4x4 Duramax
Mike C is offline   Reply With Quote
Old 05-16-2002, 10:50 PM   #7
Longhorn Man
its all about the +6 inches
 
Longhorn Man's Avatar
 
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
Post

Torque will take care of crappy first gears.
Andy, you said you upgraded your tranny before installing it. That is why yours is good.
If you were to crack it open beside TH350 guts, you would see that the clutch packs are 10 times better on the 350. Won't even talk about the TH400.
The 700 is fine for a stock situation. i would just never install it behind a HI-Po motor.
The gear vendors is so tough, you'll never build a street engine (small block/big block) that could hurt it.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
E-mail longhornmail@yahoo.com
My name is Andy...not Randy...I'm in Ohio...Not Illinois...close enough?
Columbus Ohio


Longhorn Man is offline   Reply With Quote
Old 05-16-2002, 10:50 PM   #8
slam33
Registered User
 
slam33's Avatar
 
Join Date: Aug 2001
Location: Long Beach, Ca
Posts: 1,432
Post

4l80 is a computer trans, no thanks, I have the option of going lockup if I want the extra 2mpg. As for the built 700, that's what I priced out from Art Carr who seems to be about the best there is and has been for 40 yrs. Even they admit that a built 350 will take more that a built 700. Plus I don't have the 2 piece shaft set up to deal with. Inland drive shaft says a one piece for the 700 is a bit on the long side even if they go with a 4 incher.

------------------
71 basic C-10 350. The only option is the rust.No nothing on it, but thats all about to change. <A HREF="http://www.geocities.com/stevemau/slam33page.html?1004806705410

" TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410

</A>
__________________
71 LWB 350/350still working on it but it's going tp be sweet. www.geocities.com/stevemau/slam33page.html

" TARGET=_blank>http://www.geocities.com/stevemau/slam33page.html?1004806705410

</A>
slam33 is offline   Reply With Quote
Old 05-16-2002, 11:20 PM   #9
72burb
Registered User
 
Join Date: Feb 2000
Location: Pagosa Springs,CO.
Posts: 181
Post

Lucas, I installed a 700-r4 in my 72 burb.
I have a 307 rear (posi). And a very strong motor. (KB forged pistons, speed pro cam and bearings, World product heads, edelbrock intake and carter 625cfm carb, Thorley headers.) I had to shorten my driveshaft 3in. and went with a one piece. STICK WITH THE TWO PIECE. I have a vibration @ high speed because you can't push the engine/trans. up high enough to match the rear pinion 3 1/2 degrees. Install a heavy duty carrier bearing and you should be fine.
My gas mileage doesn't increase much unless I drive 85 or 90 miles an hour which will get you a ticket REAL fast.(gear ratio to high) I like the trans because----It saves my motor, (RPM's) and you get the lower first gear which helps on take off's. With a lower gear ratio, say 373's, you can really make some tracks.
I bought mine from Bowtie Overdrives for around 1600 and the driveshaft will cost about 200 depending on where you live.
I hope this helps e-mail if you have questions.
-DOUG
ps. In the kit they include a kugle arm that allows you to use you stock shifter. And they do recommend a temp gauge.( I had to add a trans cooler to keep the horses from overheating the trans.)


------------------
72 burb,all the go fast goodies. (lowered)
72cst fact.air Blazer w/factory "flames"
86 burb 'monster truck'

At 7350', everything runs like a 4 cylinder.
PAGOSA SPRINGS CO.




[This message has been edited by 72burb (edited May 16, 2002).]
__________________
72 burb,all the go fast goodies. (lowered)
72cst fact.air Blazer w/factory "flames" (sold)
92 burb Cummins, Twin turbo, Dana 80/60 ATS 5 Star47RE
2001 Ram 3/4 ton w/24v cummins
At 7350', everything runs like a 4 cylinder.(except the 92 Burb)
PAGOSA SPRINGS CO.
72burb is offline   Reply With Quote
Old 05-16-2002, 11:44 PM   #10
Andy4639
Old member
 
Andy4639's Avatar
 
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,936
Cool

Longhornmail,
You may be right on the horse power thing. I had a 86 305 HO TPI installed with no mods, it's bone stock, because as I said it is my everyday driver. I wanted gas milage instead of horse power. I can cruise at 75-80 at about 2500rpm's, and average about 20mpg with the ac on depending on if I'm out on the road are in town. In town I would guess it's a little less but I don't do to much of that, since I live out in the sticks of SC.


------------------
Andy
71's Are for ever!!! or 67,68,69,70,72
71,factory tach,tilt for straight drive,gauges,ac,speed warning,clock,305 HO TPI with 700-R4, lowered 2" & 3" ,and 17" Chrome Stealth wheels, Pioneer reciever,100 watt amp, 6 disc changer, 2-10" subs (behind seat) 2-6x9 in doors, 2-3ways mounted under seat, and 2 tweaters on door panels

www.geocities.com/chevy71tpi/main.html

www.picturetrail.com/Andy4639




__________________
1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71


Upstate SC GM Truck Club
2013,14 and 2016 Hot Rod Pour Tour


http://upstategmtrucks.com/



Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
Andy4639 is offline   Reply With Quote
Old 05-17-2002, 12:08 AM   #11
Alex
Registered User
 
Alex's Avatar
 
Join Date: Jan 2000
Location: Blaine, MN
Posts: 798
Post

The Gear Vendors OD unit is $2200 brand new. Just letting you know unless they slashed the price recently.
__________________
'72 C/10 LWB 402/400
Blaine, MN
Alex is offline   Reply With Quote
Old 05-17-2002, 12:13 AM   #12
Chevyman69
Vortec 350's Suck
 
Join Date: Nov 2000
Location: Pickardville Alberta Canada
Posts: 544
Post

A factory T350 isn't the strongest tranny in the world either, I have seen many blown up with a little bit of a torquey motor. The 700R4 is a great tranny, if you go with a Corvette 4l60E style rebuild it will handle any 350 horse small block anyday. I have a 700R4 but mine has been built to withstand my BB. They cost dollars but I think the lower engine RPM, if nothing else saves a little wear and tear on the motor. Plus I can still run 373's and have low engine speed and have great off the line acceleration. Kinda pointless to keep high rear end gearing and then get overdrive, to slow and you are lugging, which isn't that great for anything either. Whatever you do if you a 700, get a lock up convertor.

------------------
69 CST 10, 402, steel crank, heavy rods, Federal Mogul Forged Pistons, 9.9:1 compression, polished ported 781 heads 2.19/1.88 manley stainless valves, Crane Powermax Hydraulic roller 288/296 and .587,.610 lift, hardened pushrods, Crane Roller Rockers, Weiand Action Plus, 750CFM Rochester QJET, MSD HEI, MSD 8MM Wires, Dynomax Ceramic coated headers, should be about 500 H.P. 700R4 2500 stall, pretty nasty shift kit, 373 Auburn Pro Series Posi, buckets/console air/tilt/tach 4wheel discs

Daily Driver: 92 Chev Reg Cab LWB Silverado 4x4, loaded, 350 Accel filter/cap/rotor/coil/AC Delco wires/AC Delco RapidFire plugs, Edelbrock intake and headers, 180 degree thermostat, Hypertech Thermomaster Chip, true duals 700R4 with B@M Shift Kit for now!


__________________
69 Chev CST 10 reg cab lwb

Daily Driver: 92 Chev Reg Cab LWB Silverado 4x4, K.I.A 7:51 AM 04/22/03
Will be resurrected
Chevyman69 is offline   Reply With Quote
Old 05-17-2002, 02:43 AM   #13
ColinOpseth
Registered User
 
Join Date: Feb 2002
Location: Los Angeles, CA
Posts: 283
Post

what all is involved in the swap? can you just relocate the stock crossmember or do you need something else?

i'm considering putting a 700r4 in my '72 shortbed.. i already have the trans, what would i need ot make it work with a stock tilt column?

thanks,
colin

------------------
Webmaster: www.GMPerformance.org
__________________
Webmaster: www.h-body.org
ColinOpseth is offline   Reply With Quote
Old 05-17-2002, 10:13 AM   #14
Blue68
Registered User
 
Blue68's Avatar
 
Join Date: Apr 2000
Location: Frisco, Tx, USA
Posts: 606
Post

1. Best thing to do is measure it. Just take the opportunity to replace all the u-joints while it's being shortened.
2. No. You'll have to move it back some.
3. Yes. I don't know about the linkage on the automatic trucks. But I'm running a Kugel arm on my 700r4 with a 3sp column.
4. Yes, buy you may have to get the drive gears in the back of the tranny to match your tire height and rear end ratio. Bowtie overdrives can help you out real quick there.
5. Lockup. At speed, in top gear, the torque converter will be slipping more than when the engine is revved, since slip equals heat, lock it up.
6. Don't count on a mpg jump. You might get one or two mpg depending on driving habits. Do it for the lower rpms at cruise and the lower first gear.

------------------
'68 C-10 LWB, '98 Z-71 350 w/accessories (Serpentine), Edelbrock Performer, Edelbrock 1405 (600cfm) carb, GM HEI, CompCam Extreme 4x4 roller cam, Thorley Headers, Carter Electric Fuel Pump, Vintage Air, 700r4, 3.73, disc brakes and power steering upgrades.


Way too much money and time..But it's a hobby.
__________________
http://home.comcast.net/~r.landrum/w...tos.html-.html

'68 C-10 LWB, '98 Z-71 350 w/accessories (Serpentine), Edelbrock Performer, Edelbrock 1405 (600cfm) carb, GM HEI, CompCam Extreme 4x4 roller cam, Thorley Headers, Carter Electric Fuel Pump, Vintage Air, 700r4, 3.73, disc brakes and power steering upgrades.
Blue68 is offline   Reply With Quote
Old 05-17-2002, 10:28 AM   #15
imaindianoutlaw
GMC SHORT FLEET F/S
 
imaindianoutlaw's Avatar
 
Join Date: Jun 2000
Location: SOUTH WILLIAMSPORT PENNSYLVANNIA
Posts: 2,117
Post

If built by the right person a th350 can handle over 500 hp, proff is in my brothers 74 gto 462 cui 12 sec car on street tires, and he beats the **** out of it!

------------------
Charles W. Hein
S. Williamsport PA

imaindianoutlaw@yahoo.com

REFRIGERATION TECH

1971 Rolling chassis

FOR SALE
1963 Pontiac Tempest
1965 Pontiac GTO
1956 Pontiac 2 dr


__________________
CHARLES WADE HEIN

HVACR FOREMAN.
LEWISBURG U.S.P.
imaindianoutlaw is offline   Reply With Quote
Old 05-17-2002, 11:05 AM   #16
red71cheyenne
Back in the sticks
 
red71cheyenne's Avatar
 
Join Date: Jan 2001
Location: Fordland, MO
Posts: 3,188
Post

The 700r4 is the same length as the th350 with long tail shaft(9"). All you have to do is move the crossmember back 2 inches because the tranny shock mount is farther back. You'll have to have metric bolts to hold the mount on the tranny. You'll have to widen/bore out the crossmember mount holes to the shock mount too as they are a little off center. The th350 shift linkage for the tilt column is a direct match for the 700r4. No changes are necessary. You will not be able to get down to L1 though as it does not allow you to shift that far. The only way to get around to that is to buy an adapter for it. You really don't need it though. Good luck and email me if you have any other questions. Jeff.

------------------
1971 Cheyenne C-10 w/700R4 and Tuned Port Injection
1969 K5 Blazer New project
1995 K1500 Sub(Mommas car)
1989 VW Golf(Beater)
Will be the daughters car if she will pay her insurance! Ha!


__________________
1971 Cheyenne C-10 w/700R4 and Tuned Port Injection
1969 K5 Blazer w/Tuned Port
2010 2SS/RS Flaming Orange Camaro
2011 K1500 Suburban
2014 K1500 Pickup
2008 Nissan Altima? The wifes' hoopty
red71cheyenne is offline   Reply With Quote
Old 05-17-2002, 11:31 AM   #17
BigDave
I poop on Ford!
 
BigDave's Avatar
 
Join Date: Apr 2002
Location: Houston Area
Posts: 295
Post

Had a built 700R4 w/lock-up and absolutely shelled the hell out of it with the motor & gears in my sig. The fact is the 700R4 was introduced as a response to the government's requirements for better fuel economy. It is lighter (tin drum) and it's gear ratios are better for fuel efficiency with the exception of first. It is also a proven fact that stock for stock the 700R4 cannot stand up to the abuse that a TH350 can. You can build a 700R4 to take the abuse but it costs a lot more. I now have a TH350-C w/lock-up. It was built to take 500+HP and it cost $900 installed.

If you are a cruiser who doesn't slam the gas with a lot of HP get the stock 700R4. If you want to do some dragging either pay the bucks for a seriously stout 700R4 or go with the cheaper but very strong TH350-C. BTW gearing and torque will take care of the TH350's first gear step.

It's funny how some of you mention the difference between 1st gear in the 700R4 and the TH350 but you never say anything about the huge step-off that the 700R4 has between first and second.

------------------
1972 Chevy Blazer 2WD - 400 SBC, bored, ported/polished heads, 9.5:1 dished pistons, Lunati 480/292 cam, electronic ignition, Edlebrock Performer intake, tricked out Rochester 850CFM Quadrajet, long tube headers, Flowmaster 40's, TH350-C with lock-up switch, 2800 rpm stall, shift kit, custom driveshaft, stock GM 12- bolt rear with Auburn Pro Series limited slip 3.73's, 2" drop spindles, 2" drop rear coils, track bar kit, front/rear stabilizers.

1999 30th Anniversary Trans-Am Coupe #1494 - M6, Flow-tech cut-out, Flowmaster, free mods. One of 292 coupes with M6 and in-dash CD.
__________________
1972 Chevy Cheyenne - LWB, factory 402BB
2005 Chevy Suburban LT
2006 Chrysler 300C - SRT8
BigDave is offline   Reply With Quote
Old 05-17-2002, 03:05 PM   #18
Mixup
Registered User
 
Join Date: Jan 2002
Location: Henderson, NV
Posts: 358
Post

Red71Cheyenne, I believe the 700R4 is the same length as the intermediate 350. There are 3 tailshafts, a 3-6-and 9". I had the 6" 350 in my 69 and it is the same size as the 700R4. All I had to do was move the crossmember. It was an easy swap.
__________________
1980 Chevy Shortbed Pickup

1969 Z28 engine

Turbo 350
Mixup is offline   Reply With Quote
Old 05-17-2002, 07:27 PM   #19
lukecp
Formerly yellow72custom
 
lukecp's Avatar
 
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
Post

I talked to a tranny rebuilder today that has a pretty good reputation. He told be about $800 to rebuild a 700R4. He told me they had got some parts in (planetary gears maybe, i dunno much about trannys) to fix some of the tranny's weaknesses. He also didn't like the lockup converter very much, he said it was another weak point of the tranny he could fix. A friend of mine runs a garage, and he will also thought the conversion would be a good idea, and is willing to help me for free. My engine has about 300HP, so i don't think i will have to build the tranny too much. I will proably go ahead and put a mild shift kit, possibly the RV-style in it, and run a tranny cooler. Thanks for the help .

------------------
Lucas

"Another proud owner of one of the coolest trucks ever built"

drop_shift@hotmail.com

My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, roughly 300 HP thanks to a 204/214 duration cam, Edelbrock Performer intake and 1406 carb, headers, and 40 seires Flowmaster mufflers. Ochre with a white top. Lots of fun .

__________________
'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride.
'70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck.
'97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg
lukecp is offline   Reply With Quote
Old 05-17-2002, 10:44 PM   #20
Richard
Senior Member
 
Join Date: Dec 1999
Location: Southern California
Posts: 2,664
Post

As for 700R4's not holding up I have a friend that has one behind a 585hp 383 with 4.09 gears in the rear. The motor had like 10 pulls on the dyno after being built and that is the average at the flywheel, the trans is having no probs. A recent 700R4 install was done on an old Chevelle along with a 550hp BB by him also, doing quite well. Another thing to note is that this auto is pretty much the trans of choice by rockcrawlers because of the low first gear. These rigs have low gear ratios, big tires and lots of hp. The rigs are almost always moving slowly in the lower gears at high RPM's generating much higher operating temps and stresses than normal driving will ever do. Never hear of trannys breaking it is usually other drivetrain parts like the axle. The 700R4 is a good trans if built and installed correctly, it will live as long as any other if properly maintained. Hope this eases some concerns.

------------------
Richard
1972 K10 Custom Deluxe SWB Fleetside

__________________
Richard
1972 K10 Custom Deluxe SWB Fleetside
My build https://67-72chevytrucks.com/vboard/...d.php?t=800746
Richard is offline   Reply With Quote
Old 05-17-2002, 11:36 PM   #21
1-PU70
Registered User
 
1-PU70's Avatar
 
Join Date: Apr 2000
Location: Bradenton, FL
Posts: 1,036
Post

I got a 700R4 behind a mild 402 in my 70 C10. I have towed some trailers a few 100 miles several times in FL and towed a car from Fl to WI with out a problems. The best part is that the tran was a take out. Only paied $200 for it. It came out of a 87 2 wheel drive Blazer with a 4.3. The only thing I did was have it resealed and wired to lock up when it went into 4th for $60. After it was installed I had a Corvette servo installed to firm up the shifts for$50. The last thing I did was wire a B&M lock up control for $150. (the lock up controll is great. You can set it to lock up in forth at any speed you want) And as fare as the TV cable you can adjust it yourself. I just followed the instructions in a Chilton manual. Very easy. The only things I would recomend is to get the bigest trans cooler you could find because heat is a auto trans #1 problem and get a trans from 87 or newer and change your 3:07 to a 3:73. Its a very easy swap and makes for a great ride. But that my opinion. And opinions are like A-Holes, everyone has one.
__________________
1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters
1-PU70 is offline   Reply With Quote
Old 05-19-2002, 12:09 AM   #22
Project1970
14.1 @ 96MPH
 
Project1970's Avatar
 
Join Date: Jul 2001
Location: Mesa, AZ
Posts: 2,811
Post

Another quick question. How do the TH400 and 700R4 compare in length - i.e. what am I going to have to do in regards to shortening the driveshaft (a one piece) and moving the crossmember?

Also, do all 700R4s have the provision for the mechanical speedo?

------------------
Project 1970 - soon to be seen at http://milhouse.treylis.org:81/

__________________
Project1970 - LS1 Swap Complete!
Project1970 is offline   Reply With Quote
Old 05-19-2002, 12:33 AM   #23
Ron
Registered User
 
Ron's Avatar
 
Join Date: Feb 2000
Location: Zillah Wa. USA
Posts: 394
Post

I just installed a 4L60, it was $1,400 from GM Performance, it has all the upgrades, converter and wiring were included. I love my lockup.

I will never go back to the turbo 350.

------------------
'67 LWB frame up resto
'69 SWB
'72 2X4 Blazer
'72 Scout II, GM 350 powered
__________________
'69 SWB
'76 International "Terra"

"Hooked on holiday beer"
Ron is offline   Reply With Quote
Old 05-19-2002, 10:49 PM   #24
ty1295
Registered User
 
Join Date: Mar 2002
Location: jeffersonville, IN
Posts: 99
Post

I have to slightly disagree on 700r4 and it being junk.

My typhoon has it from the factory. In fact it is built stronger from factory than corvette trannies are. With AWD and massive torque ~450ft lbs stock, 350 hp stock and AWD (=traction) the typhoon can rip apart trannies faster than any fairly mild corvette will.

What we have discovered in getting them to live is,

1. HEAT IS A KILLER
goes with any tranny...

2. ADD extra cluthes, some mods to increase pump pressure.

3. Most TRANNY shops, ok 99.999% CAN NOT build one to last on a typhoon. They all claim 500hp no problem, but after it blows up in 2 days they give up quickly.

I have had GREAT luck with mine. Stock typhoon tranny (has some extras anyways), derale pan, aux, cooler, aux filter.

3 yrs 36k miles, and lots of abuse, still shifts hard.

I have seen a typhoon tranny go 10's in the 1/4, and that was a factory tranny (never been rebuilt)...

Did I mention HEAT.....

------------------
Jeff Scott
'70 GMC Stepside, Short box
'67 Camaro
'63 Nova
'92 GMC typhoon

__________________
Jeff Scott
'70 GMC Stepside, Short box
'63 Nova
'92 GMC typhoon
'95 Tahoe
ty1295 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:51 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com