Another trans question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bigwin59 · 11-30-2014, 02:56 PM

Wife and I gave our 16 yearold son a 1962 c10 3 on the tree. It was an original I6. We have removed the 6 and put in a 78 350. Looking to put in a 5 speed or 6 speed. Yesterday while stumbling around junkyard we found a 1994 firebird with a 6 speed.
would there be a bunch of mods to putthat transmission in or is it even possible? Wehave a 4 speed to put in.

Lugnutz65 · 11-30-2014, 04:26 PM

I'm pretty sure that 1994 6 speed was bolted to a V8 and will have a FORD bolt pattern where it bolts to the bell. I'm fairly certain that it could be made to work.

However, it might require any 1 or more of the following changes.
1. using an adapter plate to make the 6 speed bolt to a Chevy bell
2. finding a Chevy V8 bell with a FORD bolt pattern for the transmission
3. adapting to a hydraulic clutch
4. using a different starter and flywheel
5. I probably forgot something.

A 1962 C10 has a passenger side clutch fork and hydraulic clutch system IIRC. That setup might have to be exchanged for something compatible with the 6 speed.

Look and see if the bell housing that comes with that 6 speed has a SBC V8 pattern.

I know that certain Chevy 4.3 engines have a FORD pattern for the tranny and certain Chevy 305ci (1993 and up) have a Chevy V8 pattern where they bolt to the engine and a FORD pattern where they bolt to the tranny. Here are photos from my files.

Lugnutz65 · 11-30-2014, 08:27 PM

One more thing to consider. The Firebird and Camaro transmission shifters will come through the cab floor UNDER the bench seat. So that means you'd have to switch to bucket seats and be satisfied with the shifter handle next to your thigh instead of right at the bend of your knee.

**Captainfab** · 12-01-2014, 01:10 AM

There is a fairly recent thread in the Engine and Drivetrain section about bolting a T56 up to a Gen I small block.

Here's the thread I was thinking of.

http://67-72chevytrucks.com/vboard/s...&highlight=T56

There are other threads as well.

bigwin59 · 12-01-2014, 02:45 AM

Thanks guys. I will do some more reading. My wife and I were going to do this truck for us. Then started looking at pickups and decided would rather fix this up as a daily driver for our son. Then two weeks after starting on it I found a 59 gmc that just needs paint and chrome put on. So now doing two projects.

11-30-2014, 02:56 PM	#1
bigwin59 Registered User Join Date: Nov 2014 Location: SoCal Posts: 36	Another trans question Wife and I gave our 16 yearold son a 1962 c10 3 on the tree. It was an original I6. We have removed the 6 and put in a 78 350. Looking to put in a 5 speed or 6 speed. Yesterday while stumbling around junkyard we found a 1994 firebird with a 6 speed. would there be a bunch of mods to putthat transmission in or is it even possible? Wehave a 4 speed to put in.

11-30-2014, 04:26 PM	#2
Lugnutz65 Registered User Join Date: Jan 2013 Location: Columbia, SC Posts: 1,927	Re: Another trans question I'm pretty sure that 1994 6 speed was bolted to a V8 and will have a FORD bolt pattern where it bolts to the bell. I'm fairly certain that it could be made to work. However, it might require any 1 or more of the following changes. 1. using an adapter plate to make the 6 speed bolt to a Chevy bell 2. finding a Chevy V8 bell with a FORD bolt pattern for the transmission 3. adapting to a hydraulic clutch 4. using a different starter and flywheel 5. I probably forgot something. A 1962 C10 has a passenger side clutch fork and hydraulic clutch system IIRC. That setup might have to be exchanged for something compatible with the 6 speed. Look and see if the bell housing that comes with that 6 speed has a SBC V8 pattern. I know that certain Chevy 4.3 engines have a FORD pattern for the tranny and certain Chevy 305ci (1993 and up) have a Chevy V8 pattern where they bolt to the engine and a FORD pattern where they bolt to the tranny. Here are photos from my files. Attached Images __________________ My 65 C10 build: www.lugnutz65chevystepside.weebly.com Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild.

11-30-2014, 08:27 PM	#3
Lugnutz65 Registered User Join Date: Jan 2013 Location: Columbia, SC Posts: 1,927	Re: Another trans question One more thing to consider. The Firebird and Camaro transmission shifters will come through the cab floor UNDER the bench seat. So that means you'd have to switch to bucket seats and be satisfied with the shifter handle next to your thigh instead of right at the bend of your knee. __________________ My 65 C10 build: www.lugnutz65chevystepside.weebly.com Want to know more about T5 transmissions? My website has a T5 Info Page and a Step by Step T5 rebuild.

12-01-2014, 01:10 AM	#4
Captainfab 60-66 Nut Join Date: Mar 2007 Location: Coeur d'Alene, Idaho Posts: 23,252	Re: Another trans question There is a fairly recent thread in the Engine and Drivetrain section about bolting a T56 up to a Gen I small block. Here's the thread I was thinking of. http://67-72chevytrucks.com/vboard/s...&highlight=T56 There are other threads as well. __________________ 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 Last edited by Captainfab; 12-01-2014 at 01:15 AM. Reason: added link

12-01-2014, 02:45 AM	#5
bigwin59 Registered User Join Date: Nov 2014 Location: SoCal Posts: 36	Re: Another trans question Thanks guys. I will do some more reading. My wife and I were going to do this truck for us. Then started looking at pickups and decided would rather fix this up as a daily driver for our son. Then two weeks after starting on it I found a 59 gmc that just needs paint and chrome put on. So now doing two projects.



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