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 > General Truck Forums > Engine & Drivetrain

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 09-15-2017, 02:21 PM   #1
jamyers
Registered User
 
jamyers's Avatar
 
Join Date: Jan 2013
Location: Buffalo Gap, TX
Posts: 216
Need opinions on used 700R4

Hello from Abilene TX!

'69 C10 longbed with a newly-rebuild stock 350, a good TH400, and 3.73 open rear gears - NEEDS an overdrive!

I picked up from Craigslist what I was told was an '84 700R4 out of a monte carlo with a 305 V8. The fluid looked good, and there was very little stuff in the pan - which looked like it hadn't been off in a long time. After ClineBarger's comments in the 700R4 thread, I was planning on installing the TransGo shift kit and plate, converting it to hydraulic TCC lockup, and everything else I could do to the valvebody, then swapping it into the truck - assuming that its clutches and bands had some life left in them.

Today I started pulling it apart and found that it has the L4/V6 band apply piston, not the V8 one - which makes me really leery of the rest of the insides of it, if it started life behind a V6 and then got stuck behind a V8.

I've rebuilt everything else on an old car, but I've never been any deeper into an automatic than the valve body - and not sure I want to dive into one at this point.

So I figure I can (1) get a V8 apply piston and forge ahead with the original plan, (2) Get this one completely rebuild by somebody who knows what they're doing, (3) rebuild this one myself, or (4) leave the working TH400 in there and keep getting 10 mpg.

Opinions?
__________________
My Chevy Truck Project Build Thread
'62 Ranchero - 200 I6, 3-on-the-tree, power nothing.
'71 LeSabre - 455 Stage 1, power everything.
jamyers is offline   Reply With Quote
Old 09-15-2017, 02:28 PM   #2
jamyers
Registered User
 
jamyers's Avatar
 
Join Date: Jan 2013
Location: Buffalo Gap, TX
Posts: 216
Re: Need opinions on used 700R4

Just tried to PM Clinebarger, but his PM mailbox is full.
__________________
My Chevy Truck Project Build Thread
'62 Ranchero - 200 I6, 3-on-the-tree, power nothing.
'71 LeSabre - 455 Stage 1, power everything.
jamyers is offline   Reply With Quote
Old 09-15-2017, 02:30 PM   #3
Bigdav160
Registered User
 
Bigdav160's Avatar
 
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
Re: Need opinions on used 700R4

The surface area of the clutches should be the same between a 6 cyl, 305 and 350

Upgrade the throttle/boost valve and servo and it should be OK for a stock build 350. The TransGo 700R4 junior is a good kit. Don't buy the big shift kit. It's meant for racing applications.

What's the broadcast code on the corner of the case?
__________________
My Classics:
'72 K20 Suburban + '65 Dodge Town Wagon
'72 Corvette Roadster +'67 Corvette Roadster
'73 Z-28 Camaro
'63 Ford SWB Uni Pickup
'50 Ford Coupe
Bigdav160 is offline   Reply With Quote
Old 09-15-2017, 05:30 PM   #4
jamyers
Registered User
 
jamyers's Avatar
 
Join Date: Jan 2013
Location: Buffalo Gap, TX
Posts: 216
Re: Need opinions on used 700R4

From the 700R4 rebuild thread;
"554 Piston. Has the Smallest Apply Area, Has the Weakest clamping force on the Band, Used on 4 & 6 cylinder applications. DO NOT USE behind a V8!!!"

I've got the 554 piston.

I'll get that broadcast code.
Attached Images
 
__________________
My Chevy Truck Project Build Thread
'62 Ranchero - 200 I6, 3-on-the-tree, power nothing.
'71 LeSabre - 455 Stage 1, power everything.
jamyers is offline   Reply With Quote
Old 09-15-2017, 05:42 PM   #5
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,557
Re: Need opinions on used 700R4

give cline a little time...he'll cruise thru here and tell you what's what...
mongocanfly is offline   Reply With Quote
Old 09-15-2017, 06:04 PM   #6
jamyers
Registered User
 
jamyers's Avatar
 
Join Date: Jan 2013
Location: Buffalo Gap, TX
Posts: 216
Re: Need opinions on used 700R4

Code stamped in drivers side rear pan rail = 4YK165BT
__________________
My Chevy Truck Project Build Thread
'62 Ranchero - 200 I6, 3-on-the-tree, power nothing.
'71 LeSabre - 455 Stage 1, power everything.
jamyers is offline   Reply With Quote
Old 09-15-2017, 07:41 PM   #7
jayoldschool
Moderator
 
Join Date: Dec 2012
Location: ON, Canada
Posts: 2,148
Re: Need opinions on used 700R4

Buy one out of a 91-93 Caprice/Roadmaster/Fleetwood. Has all the updates/strongest factory parts for a 700R4. Of course, there are a lot better parts you can put in...
jayoldschool is offline   Reply With Quote
Old 09-15-2017, 08:44 PM   #8
clinebarger
Senior Member
 
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
Re: Need opinions on used 700R4

A lot of the early V8 700R4's ('82-'86) had 554 2nd pistons especially fullsize sedans (Caprice/Impala etc.)

Early 700R4's are difficult to decode the application, Your 4YK165BT would be 1984, The only V6/I4 engines with 700's were the 2.8L & 2.5L & had 60 degree bellhousings......The 4.3L hadn't came out yet & the 229 V6 had TH200C's behind them, It a pretty safe bet your 700R4 is from behind a 305 SBC.

It will have a 6 clutch 3-4/5 clutch forward/5 clutch Low-Reverse/4 clutch Reverse Input just like all V8 700R4's.

Whether or not the Cast Iron Pump Rings can handle a large ratio TV boost valve like a .500" is anyones guess......

A 093 2nd piston will help the Band & 3-4 clutches live longer!
clinebarger is offline   Reply With Quote
Old 09-15-2017, 09:57 PM   #9
jamyers
Registered User
 
jamyers's Avatar
 
Join Date: Jan 2013
Location: Buffalo Gap, TX
Posts: 216
Re: Need opinions on used 700R4

Thanks for the input, I feel better about this thing now.

Clinebarger, I'd be interested in PMing you about maybe building me a transmission, but your PM's are full. My email is jamyers63@gmail.com if that's easier for you.
__________________
My Chevy Truck Project Build Thread
'62 Ranchero - 200 I6, 3-on-the-tree, power nothing.
'71 LeSabre - 455 Stage 1, power everything.
jamyers is offline   Reply With Quote
Old 09-19-2017, 07:31 PM   #10
clinebarger
Senior Member
 
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
Re: Need opinions on used 700R4

Quote:
Originally Posted by jamyers View Post
Thanks for the input, I feel better about this thing now.

Clinebarger, I'd be interested in PMing you about maybe building me a transmission, but your PM's are full. My email is jamyers63@gmail.com if that's easier for you.
You can PM me now.
clinebarger is offline   Reply With Quote
Old 09-22-2017, 10:50 AM   #11
jamyers
Registered User
 
jamyers's Avatar
 
Join Date: Jan 2013
Location: Buffalo Gap, TX
Posts: 216
Re: Need opinions on used 700R4

PM sent
__________________
My Chevy Truck Project Build Thread
'62 Ranchero - 200 I6, 3-on-the-tree, power nothing.
'71 LeSabre - 455 Stage 1, power everything.
jamyers 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 04:39 AM.


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