Borg Warner T5 ?
on marketplace this morning and seen a BW T5 5 speed cheap, its a Ford application but it got me looking.
Thinking about picking up a Chevy BW T5 and slowly accumulating what's need to put in my 70 to replace the 4 speed.
Just playing with the thought right now but appears they are out there, my nephew who works for GM has a good trans builder and would have him go through it.
they can be found fairly cheap, I am not a hot rodder and more of a cruiser but assuming I am looking for a 80s- early 90s camaro V8 5 speed.
If I see the right one pop up im thinking of grabbing it and slowly getting together what's needed to put in my car... thoughts from guys who've done this install.
I am fully aware of the TKX kits... thats not what im asking about.
All of my T5 experience comes from Jeep CJ7's.
Jeep used a Ford version, I assume the Chevy and Ford versions have different bolt patterns.
The T5 is similar to the T4 used in Jeeps, which was placed behind the GM Iron Duke 4 cyl.
If you can find that bellhousing it will mate a Chevy engine to a Ford transmission, should you decided to use a Mustang trans.
There are also aftermarket conversions for people dropping SBC's into Jeeps, that will mate the Ford pattern T5 trans to a SBC.
All of the Ford T5's I've seen have a 1 1/16" input shaft, vs the Chevy 4 speed input shaft of 1 1/8".
I don't know what the Chevy T5 input shaft is.
I only mention the Ford T5's to give you more options for finding a trans., I see them occasionally, I haven't seen a Chevy version.
All of my T5 experience comes from Jeep CJ7's.
Jeep used a Ford version, I assume the Chevy and Ford versions have different bolt patterns.
The T5 is similar to the T4 used in Jeeps, which was placed behind the GM Iron Duke 4 cyl.
If you can find that bellhousing it will mate a Chevy engine to a Ford transmission, should you decided to use a Mustang trans.
There are also aftermarket conversions for people dropping SBC's into Jeeps, that will mate the Ford pattern T5 trans to a SBC.
All of the Ford T5's I've seen have a 1 1/16" input shaft, vs the Chevy 4 speed input shaft of 1 1/8".
I don't know what the Chevy T5 input shaft is.
I only mention the Ford T5's to give you more options for finding a trans., I see them occasionally, I haven't seen a Chevy version.
I have found a number of Chevy camaro V8 T5s, a few with bellhousings but there are bellhousings out there as well.
Just beginning the research trying to get an understanding of what I would be needed to do the conversion beyond driveshaft shortening.
once I get a grasp of the job and what's needed I can pull the trigger on picking one of these up... thanks again.
So the Camaro T5 requires a different bellhousing than a 4 speed?
Is it a hydraulic clutch?
Does your research say anything about input shaft diameter?
I just installed a new clutch (1 1/8", 10 spline) and bellhousing when I converted my car to a manual, I'd like to find a trans that used it.
So the Camaro T5 requires a different bellhousing than a 4 speed?
Is it a hydraulic clutch?
Does your research say anything about input shaft diameter?
I just installed a new clutch (1 1/8", 10 spline) and bellhousing when I converted my car to a manual, I'd like to find a trans that used it.
No info on input shaft but I read allot about the Ford input shaft won't work so that just makes me assume the Chevy will... but still unsure.
I plan to get together what's needed over the summer and tackle the job when the Az weather cools down... I did the same a few years ago with a 2004r install in an 80 I had.
thank you again
Here's what Grok has to say, which matches what I recall from my previous (undocumented) research. Double check all part numbers, and sources, of course. Given your limited range of T5s, it seems you've already figured out that you need a World Class (WC) version. It even gives some solutions for the Ford-sourced T5s, which I didn't look into at the time.
IIRC, you could save hundreds of dollars by doing this, and using a "road-tested" transmission, vs. a new TKX kit.
corvetteforum.com +1
Key Requirements
- Bellhousing/Adapter Setup (biggest hurdle): Most T5 WC units (especially Ford Mustang versions) use a Ford bolt pattern. You need either:
- A Quick Time or similar SFI-rated bellhousing designed for SBC/BBC to Ford WC T5 (e.g., Quick Time RM-6064).
shiftsst.com - Or a Ford T5 to Chevy Muncie-style bellhousing adapter plate (e.g., from Hot Rod Works or Modern Driveline, ~$200-300). These plates register properly and often include hardware. Some setups use a GM bellhousing + adapter plate/spacer (typically 1/2" to 3/4" aluminum).
hotrodworks.com +1 - Pilot bushing: Often requires an adapter or extended pilot bushing to match the T5 input shaft length (commonly needs ~7-1/8" effective length from trans face).
- Clutch/flywheel: Use a Chevy-style setup (e.g., 10.4" or appropriate diameter clutch). Hydraulic clutch is common (e.g., from Camaro donor or aftermarket master/slave). Mechanical is possible but more involved.
digitalcorvettes.com
- A Quick Time or similar SFI-rated bellhousing designed for SBC/BBC to Ford WC T5 (e.g., Quick Time RM-6064).
- Shifter Location and Tunnel: T5 shifter position varies by donor. You may need to modify the tunnel, cut/weld a new crossmember or perch plate, and use a custom shift plate to fit/retain the console (some kits make this plug-and-play). Lay the trans so the mount is parallel to the ground.
digitalcorvettes.com +1 - Crossmember/Mount: Modify the stock C3 crossmember (cut/weld brackets) or use an aftermarket mount/perch. Driveshaft usually needs shortening.
digitalcorvettes.com - Other:
- Speedometer (cable vs. electronic depending on donor).
- Clutch linkage/slave cylinder.
- Possible tailshaft housing swap (e.g., S10-style for better shifter position in some chassis).
youtube.com - Strength note: Stock T5 WC is marginal for high HP (typically ~300 lb-ft safe; rebuild with better parts or consider a built unit/Tremec TKX for more power).
forums.corvetteactioncenter.com
hotrod.com +1
Sourcing a Suitable T5 WCPreferred donors for WC (stronger synchros/bearings):
core-shifters.com
- Ford: Late 1985-1993+ Mustang (V8 preferred for gearing; e.g., 5.0L Fox-body or SN95). Common and cheap in junkyards.
- GM: 1988-1992 Camaro/Firebird (V8 WC units). Earlier GM T5s may be non-WC.
- S10/Blazer/Astro: 1993+ WC versions (some have Chevy bolt pattern, which simplifies things, but shifter location/gearing may differ; V6/4-cyl units common).
pro-touring.com
Forums for details: CorvetteForum, DigitalCorvettes, and Pro-Touring have many C3 T5 threads with photos and member experiences.
corvetteforum.com +1
Measure everything (input shaft, etc.) before buying, and consider a full kit from SST or American Powertrain if you want minimal fabrication. It's doable as a weekend project for a mechanically inclined person but involves fab work.
Here's what Grok has to say, which matches what I recall from my previous (undocumented) research. Double check all part numbers, and sources, of course. Given your limited range of T5s, it seems you've already figured out that you need a World Class (WC) version. It even gives some solutions for the Ford-sourced T5s, which I didn't look into at the time.
IIRC, you could save hundreds of dollars by doing this, and using a "road-tested" transmission, vs. a new TKX kit.
should be a fun challenge for me. Thanks again
The Best of Corvette for Corvette Enthusiasts
I've seen many S10 T5s but they look completely different than the camaro... biggest difference is shifter is much further forward on the transmission
The forum has plenty of very good topics on the T5 and similar swaps:
A few of the threads I bookmarked:
https://www.corvetteforum.com/forums...sion-swop.html
https://www.corvetteforum.com/forums...-part-2-a.html
https://www.corvetteforum.com/forums...on-thread.html
The forum has plenty of very good topics on the T5 and similar swaps:
A few of the threads I bookmarked:
https://www.corvetteforum.com/forums...sion-swop.html
https://www.corvetteforum.com/forums...-part-2-a.html
https://www.corvetteforum.com/forums...on-thread.html
I've seen many S10 T5s but they look completely different than the camaro... biggest difference is shifter is much further forward on the transmission
To me the new aftermarket kits are outrageously expensive and have been for over 20 years which prompted the look at the V8 Camaro T5's. I ultimately gave up on the conversion since I don't drive the car enough for it to matter to me with the current SuperT10 4 speed and there were just too many variables/modifications (to me) to make the T5 work in a C3, but your results may differ.
I will add if you intend to drive the car modestly there should be no issues with the strength of the V8 T5's as long as you don't drop the clutch from 3,500 RPM doing standing starts and you roll into the throttle which, even, I do with my rebuilt/upgraded 355 L-82 with the SuperT10 4 speed, not rated or built for the current gross HP the motor has today. All is well 12 years into the rebuild.
I think you are making the 5 speed swap unnecessarily complex, but if you are looking at this as a challenge, than I guess that's OK.
I installed a TKO to replace my automatic many years ago. It is a very smooth swap, even more so if you are starting with a 4-speed. All the challenges have been worked out, and you're not reinventing the wheel. That's what I would recommend.
Best of luck either way.
I reached out to American Powertrain... they wont even talk to me unless im buying a 5 speed from them... won't sell any install components as well...
then called Silver Sport and quite helpful but only deal with Ford T5 installs in the C3... and will sell me the entire kit less trans but it ain't cheap.
So trying to understand why only deal with a Ford T5 install... wouldn't some of those components still work with a GM T5 install and not require some of it... is he just trying to sell me more parts?
So here are my questions to anyone who may know...
1. I have a 70 L46 4speed car, I am reading I could have 10 spline or 26 spline as thats the transition year... is there a way to tell without disassembly?
2. If I have the 26 spline can I simply use my clutch assembly with the T5 as it is also 26 spline?
3. Are the GM and Ford T5 the same outer casings meaning would the same mount work for either or are they specific?
4.They have an electronic speedo to mechanical speedo kit, would it be the same Ford or GM T5?
I am confused why he would just sell me what's needed to do the GM T5 install as it would eliminate the adapter plate needed...
I have read some threads leading me to believe I can simply use my bellhousing and mechaincal clutch assembly as long as both are 26 spline... am I mistaken?
The install all appears pretty straight forward and all documented by silver sport for the Ford T5 install, just seems like more parts and work needed vs the GM T5
and I am only looking at WC T5s and most of the GM first gear ratios are 276 or 295
Last edited by Golfobsessed; May 7, 2026 at 02:28 PM.
and I also see the Ford 5 speed didn't go to electeonic speedo till 94, most the WC GM T5s im finding are electronice but I can change the tail housing cheap and easy enough.
I can't get clarity on GM T5 trans mount with my car, shifter relocation and is it just as simple as changing clutch kit to 26 spline for the GM T5 to bolt up to my bellhousing without other mods for clutch function
I can use the 83 bellhousing with the tilt to get the shifter very close to position but prefer just modify a shifter.
the Ford T5 install comes with everything I need but the Ford T5s have a 3.35 first gear and too short with my 3.70 rear... the GM has the 2.95 and would work much better.
thanks again
















