Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
01-17-2018, 04:18 PM | #1 |
Registered User
Join Date: Oct 2017
Location: Seguin, TX
Posts: 89
|
SM318 to Saginaw 4 speed
Shouldve posted here.
I was wanting to swap out my 4 bolt cover sm318 to a floor shift Saginaw 4 speed. Would I be able to bolt it right up without swapping the clutch or messing with the drive shaft? Will it bolt up to the bell housing thats on there? It's going behind a 250.
__________________
67 C10 "Big Red" |
01-17-2018, 07:14 PM | #2 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
|
Re: SM318 to Saginaw 4 speed
You wont need to swap the clutch, & the trans should bolt right up to your 67 bell. You will need to nut & bolt the bottom 2 on the trans to bell, as the truck trans takes the bolts on the bottom into the trans case. The spilne will be wrong on the slip yolk(no biggie). Next on the driveline....it depends on which 318 ,that you have, the long tail, will keep the drive shaft @ proper lenght. If you have a short tail 318, you will need to cut the front shaft, to fit the Saginaw trans. Longhorn
__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
01-17-2018, 07:32 PM | #3 | |
Registered User
Join Date: Oct 2017
Location: Seguin, TX
Posts: 89
|
Re: SM318 to Saginaw 4 speed
Quote:
__________________
67 C10 "Big Red" |
|
01-17-2018, 08:00 PM | #4 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
|
Re: SM318 to Saginaw 4 speed
The slip yolk, from any 350 turbo will fit (just match the U joint caps). Most likely 1310 U joints on the 1/2 ton truck. Measure the lenght of the 2 trans....if its off, it will be by a bunch Last ?, YES, that car trans will fit the 67 truck bell....but as I mentioned, the truck trans will run the bottom 2 bolts through the bell & into the trans ears. You need to nut & bolt the bottom 2 , to run the car trans. This is no issue, I have done it several times Longhorn
__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... Last edited by crazy longhorn; 01-17-2018 at 08:05 PM. Reason: more info |
01-17-2018, 08:08 PM | #5 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,656
|
Re: SM318 to Saginaw 4 speed
Are you sure about the tranny bolting up Mr. Shorthorn. I thought the 67-68 had a bigger input bearing retainer. 5 1/8 IIRC compared to 4 7/8 for the Saginaw. 69 and newer were the same.
There are sleeves available if needed. Other thing to watch for on a sag is the first gear ratio. The weakest ones had a 3.43 1st gear. |
01-17-2018, 08:38 PM | #6 | |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
|
Re: SM318 to Saginaw 4 speed
Quote:
__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... Last edited by crazy longhorn; 01-17-2018 at 08:49 PM. Reason: typo |
|
01-17-2018, 08:57 PM | #7 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,656
|
Re: SM318 to Saginaw 4 speed
Upon further research you are correct!
I was close! Thank you Mr. Shorthorn! |
01-17-2018, 10:08 PM | #8 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
|
Re: SM318 to Saginaw 4 speed
Just another couple thoughts.....from one gezzer to another, I do agree that the lower 1st geared trans will be the weaker of the mix. Behind the inline 250,IMHO none should be a problem. I ran a low geared 1 , for 25,000 miles & ran it hard behind a "warm" 331. It finally took a dump, behind a 355 in my longhorn....(6500 rpm shift into 3rd gear)! The thing that I will say & stress, every time that trans was out for a clutch, the input bearing was replaced in the trans, as well as the pilot bushing. Longhorn
__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
01-17-2018, 11:11 PM | #9 | |
Registered User
Join Date: Oct 2017
Location: Seguin, TX
Posts: 89
|
Re: SM318 to Saginaw 4 speed
Quote:
__________________
67 C10 "Big Red" |
|
01-18-2018, 04:33 PM | #10 | |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
|
Re: SM318 to Saginaw 4 speed
Quote:
__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
|
01-25-2018, 04:32 PM | #11 | |
Registered User
Join Date: Oct 2017
Location: Seguin, TX
Posts: 89
|
Re: SM318 to Saginaw 4 speed
Quote:
__________________
67 C10 "Big Red" |
|
01-25-2018, 05:34 PM | #12 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
|
Re: SM318 to Saginaw 4 speed
If you can find a complete shaft, from a 71-72 truck, with an inline (same wheelbase as yours), it will have the longer saginaw trans. The saginaw is the same lenght (3 or 4 spd)& the shaft should bolt right in Best of fun, Longhorn
__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
02-02-2018, 07:54 PM | #13 |
Registered User
Join Date: Oct 2017
Location: Seguin, TX
Posts: 89
|
Re: SM318 to Saginaw 4 speed
Another question for you longhorn. Would switching to a single driveshaft be better? The carrier bearing has never been replaced so I'm wondering if switching to a single driveshaft would be better. My only issue is I need a 69 inch shaft from what I can tell. At least that the measurements from the tail shaft on the transmission to the end of the diff.
__________________
67 C10 "Big Red" |
02-03-2018, 01:12 PM | #14 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
|
Re: SM318 to Saginaw 4 speed
You will be right on the borderline of a no no, with a 1 pc shaft that long. Some guys have done it, but you need a large diameter tube to support the lenght. On a 4-4 1/2" diameter tube, a steel shaft will be very heavy, & may be hard to balance. Some vans use a large diameter aluminum shaft....but you may also have issues clearing the hole in the crossmember for the carrier bearing. IMHO, you would do better to shorten & rebalance your shaft....but you may talk with some driveline guys on the pros/cons. I beleive there are some guys on the board that do driveline work for a living....I would leave that to them, for their expertice Longhorn
__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
02-04-2018, 12:01 AM | #15 | |
Registered User
Join Date: Oct 2017
Location: Seguin, TX
Posts: 89
|
Re: SM318 to Saginaw 4 speed
Quote:
__________________
67 C10 "Big Red" |
|
02-04-2018, 12:02 AM | #16 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,248
|
Re: SM318 to Saginaw 4 speed
IMO if you use the HD carrier bearing, there is absolutely no reason to not use a 2pc driveshaft on a longbed.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
02-04-2018, 12:05 AM | #17 |
Registered User
Join Date: Oct 2017
Location: Seguin, TX
Posts: 89
|
Re: SM318 to Saginaw 4 speed
Do you think that because the driveshaft is 50 years old I should replace it? Looks pretty rusty but I don't think I have any vibrations. Also, I may need one of your brake booster brackets soon
__________________
67 C10 "Big Red" |
02-04-2018, 12:14 AM | #18 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,248
|
Re: SM318 to Saginaw 4 speed
Unless the rust is so severe that it has compromised the integrity of the tube, there is no need to replace it. Just clean it up, paint it, replace the u-joints and carrier bearing and you should be good to go. And of course shorten the front shaft if needed.
I will be leaving on vacation tomorrow and will be back in the 14th. I can build and ship a booster bracket to you then.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
02-04-2018, 12:16 AM | #19 | |
Registered User
Join Date: Oct 2017
Location: Seguin, TX
Posts: 89
|
Re: SM318 to Saginaw 4 speed
Quote:
__________________
67 C10 "Big Red" |
|
03-26-2018, 03:22 PM | #20 |
Registered User
Join Date: Oct 2017
Location: Seguin, TX
Posts: 89
|
Re: SM318 to Saginaw 4 speed
Ok so I have sourced my shifter and my driveshaft! Would I be able to just bolt everything in or do I need a new slip yoke for the car trans? I got a 2 piece from a 71 3 speed truck.
Also, what should I do with the column? How do I make sure that the old three on the tree wont cause me any stress down the road?
__________________
67 C10 "Big Red" |
03-28-2018, 05:35 PM | #21 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
|
Re: SM318 to Saginaw 4 speed
The shaft should slide in, yolk & all .....as far as the column, you can knock the pin out, & just remove the lever, & drop the old 3 spd linkage rods off The only thing you will loose is the back up lites As you get into the swap, feel free to ask more ? , if needed....Longhorn
__________________
69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
03-29-2018, 08:35 AM | #22 | |
Registered User
Join Date: Oct 2017
Location: Seguin, TX
Posts: 89
|
Re: SM318 to Saginaw 4 speed
Quote:
Hopefully, I'll get started on this project this weekend and knock it out quick!
__________________
67 C10 "Big Red" |
|
Bookmarks |
|
|