GTPP MT82 to Tremec Swap

[Cz_Ziemniak]

Has anyone went ahead and swapped a Tremec into the GT yet? Curious if there's any sort of additional programming needed to be done for the ECU to read the right engine speed, or anything else like that.

Otherwise, is the install mostly straight forward like previous gens, issues, etc? Would installing a slightly lighter flywheel trip the ECU up at all and confuse it? Looking into doing this swap down the line, probably before I hit 100K miles.

- Thanks

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[rijndael]

For RevMatching to work perfectly, there'd need to be a programming change.

 

[Cz_Ziemniak]

For RevMatching to work perfectly, there'd need to be a programming change.

I don't use rev match, so that wouldn't be of concern. Good to know though

 

[Farmer Fran]

Is the gearing the same?

 

[Cz_Ziemniak]

Is the gearing the same?

I'd be tightening up the gear ratios over the stock MT-82.

 

[robvas]

Is the gearing the same?

 

[AZ_Ryan]

As mentioned the gear ratios are different, and the revmatch programming probably is too. Not sure what else.

Seem like a lot of work to do on a GT. Have you considered just trading for a DH?

 

[Cz_Ziemniak]

As mentioned the gear ratios are different, and the revmatch programming probably is too. Not sure what else.

Seem like a lot of work to do on a GT. Have you considered just trading for a DH?

I can't imagine its *that* much work to justify trading into a different car. The transmission will have to come out for a clutch replacement eventually anyway.

 

[rijndael]

You may be able to mitigate some of the ratio differences if you also swapped the rear diff gearing at the same time. I haven't done the math, but that's a common thing to do.

 

[Cz_Ziemniak]

You may be able to mitigate some of the ratio differences if you also swapped the rear diff gearing at the same time. I haven't done the math, but that's a common thing to do.

Don't both the DH and the PPGT have the same rear? Pretty sure the DH has a 3.73 final drive, right?

 

[rijndael]

Don't know, my manual GT has 3.55s

 

[Cz_Ziemniak]

Yeah, I looked it up, same rear ratio.

half the reason I'm looking into this is so I can have tighter ratios, other half is for the tremec and a little less rev hang with a few lbs off the flywheel. Nothing crazy, but just enough to make a difference.

 

[robvas]

Here's a 4.09 MT82-D4 vs a 3.55 Tremec 3160, speed in gears at 7300RPM

 

[Scrape]

I also was curious as well if it would work or not.

 

[Cz_Ziemniak]

I also was curious as well if it would work or not.

My thoughts are, well, how hard could it be? Maybe needs different mounts or something. my biggest question would truly be regarding whether or not the ECU would get fussy with communications. At the end of the day, its just a stickshift, right??

I fondly remember doing tranny swaps in TR6's by pulling the whole assembly out the inside of the car. Hahah, good times.

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