Anybody ever swap in a modern 6 spd Manual trans out of a corvette into a chevelle or does this just not work? I realize the lastest ones have the trans just ahead of the rearend, but may be not on the C4's?

Thoughts?

Most of the 6 speed swaps involve taking the F-body T56 trans and stuffing them in. Applicable years are 93-02 Camaros and Firebirds. There is a ton of info on this site and other across the internet. I think the C4 Vettes used ZF transmissions, and if I recall correctly, they are very expensive and probably not as strong as the T56. The ZF trans may also be a much harder swap because parts may be harder to find.

Ryan

The ZF is stronger than a T56,shifts nicer,but is larger in size and parts are a little more expensive. However,parts aren't that hard to get anymore.
A ZF would be much tougher to install into a Chevelle because of its physical size and the need to fabricate custom brackets for the hydraulic clutch assembly.

Will it fit without modifying the trans hump? I do not want to cut up a car to make the trans fit like the tremec 6 spd requires.

Sounds like you answered your own question. I see a 5-speed in your future.

There is NO overdrive swap (manual trans) that can be properly done that does not require tunnel surgery...period.

There is NO overdrive swap (manual trans) that can be properly done that does not require tunnel surgery...period.

I will second that if you want to do it right. I took me 2 weeks to decide if I wanted to cut and rework my tunnel for a 6 speed installation. Guess what, after the first test run, I'd do it again..........

Regards, Jody

Yes, even the Gear Vendors unit requires some tunnel pounding to clear. But GV is about the only OD option that doesn't require any cutting. I'll be putting one behind my M22 instead of the T56.

Does the gear vendors have a separate shifter, I have never seen one from the interior, just pictures of one installed from underneath...

It's not a separate shifter, it engages electronically from a Hurst T-shifter with a thumb switch that GV sends you. I don't really like the t-shifter so I'm going to try and drill out my ball shifter and install the switch.

dennis68 There is NO overdrive swap (manual trans) that can be properly done that does not require tunnel surgery...period. The MY6 4 speed overdrive manual trans fits perfectly in place of a Muncie. Big gear spread but in my application the .71 overdrive ratio will work just fine.

dennis68 There is NO overdrive swap (manual trans) that can be properly done that does not require tunnel surgery...period. The MY6 4 speed overdrive manual trans fits perfectly in place of a Muncie. Big gear spread but in my application the .71 overdrive ratio will work just fine.
OK, my bad. No "real" OD worth the the effort to swap in is what I meant to say. Swapping the old saginaw OD in is about the equivalent of running 2.00 diff gears and a compound low 4-speed, not worth it and defineatley not strong enough for what todays engine are capable of.

The MY6 4 speed overdrive manual trans fits perfectly in place of a Muncie. Big gear spread but in my application the .71 overdrive ratio will work just fine.

Well, please don't plan on abusing this transmission! She will surely break under torque stress.

Regards, Jody

MY6, A New Process A-833 meant for a pickup is pretty beefy. In the mopar version they refer it as the hemi 4 speed. Nothing as good as the Muncie but with my stock engine I don't think I will have any problems. No installation woes, not even the driveshaft needs changing. This trans is not well known but was offered in the 80-86 Chevy pickups.

MY6, A New Process A-833 meant for a pickup is pretty beefy. In the mopar version they refer it as the hemi 4 speed. Nothing as good as the Muncie but with my stock engine I don't think I will have any problems. No installation woes, not even the driveshaft needs changing. This trans is not well known but was offered in the 80-86 Chevy pickups.
I worked at Chrysler dealerships as a technician for about 8 years...never heard of them referred to anything but junk, for sure not the "hemi trans". It was never offered behind a hemi in the OD version, which is by far the weakest of the NP boxes out there.

It's not that it's an unknown fact, just one that most chose to ignore. Hey, if it works for you thats great, just don't try to apply any real power to it.

Well just to add a little drama, there is a Muncie OD, in a stock case. Like the chisler trans it's a 4 speed with 4th being the od. The shifter is the only part that requires a little thought. Cheap compared to some of the other options.

Well just to add a little drama, there is a Muncie OD, in a stock case. Like the chisler trans it's a 4 speed with 4th being the od. The shifter is the only part that requires a little thought. Cheap compared to some of the other options.

Wally,

Have you sold any of these units or gearsets to anyone? What are your thoughts experineces with them?

We have not had anyone step up to the plate and request one from us at this time.

Thanks, Jody

What did the ZF trans come in?

A Richmond Six Speed is the same size as a Muncie and will bolt right in. No fuss no muss.


John W.

There are different choices for a 6 speed upgrade. The main reason I used a Richmond 6 speed was, so I could utilize the reverse lock out rod for the backup lights and steering column lock. I wanted that function to still operate like it did with the 4 speed. You can't do that with the ZF or T56.

Regards, Jody

What did the ZF trans come in?

91-96 Corvettes

Great tranny by the way. Good gearing, very smooth shifts and quiet. I know a guy in Michigan who has a ZF6 in his 71 Chevelle 502. He said it required a lot of custom fitting (ie tunnel surgery) to get it to fit right. He absolutly loves it though.

A Richmond Six Speed is the same size as a Muncie and will bolt right in. No fuss no muss.


John W.

Not quite correct. The ROD 6-speed is physically larger than a Muncie, and you still have to slice off a thin strip on the side of the tunnel and beat the crap out of one of the floorpan braces for shift rod clearance to set the tranny high enough to keep a correct pinion angle. Been there, done that.

Troy

91-96 Corvettes
Great tranny by the way. Good gearing, very smooth shifts and quiet. I know a guy in Michigan who has a ZF6 in his 71 Chevelle 502. He said it required a lot of custom fitting (ie tunnel surgery) to get it to fit right. He absolutly loves it though.

Actually,the ZF 6spd was introduced in the MY 89 Corvette. The ZF's with the highest torque ratings were those used in the 90-92 ZR-1's.
ZF's are one of the smoothest shifting trannys ever built. They have held up behind 900rwhp/850rwtq twin turbo ZR-1's so their ratings are very conservative.

Actually,the ZF 6spd was introduced in the MY 89 Corvette. The ZF's with the highest torque ratings were those used in the 90-92 ZR-1's.
ZF's are one of the smoothest shifting trannys ever built. They have held up behind 900rwhp/850rwtq twin turbo ZR-1's so their ratings are very conservative.

I stand corrected. I wasn't sure where the cutoff was for the ol 4+3 trans they used in the 80's.