6spd Transmission from LS1??

[Silver3800V6FBodyKY]

I've found a setup with everything I need except for the Center Console and the Bellhousing for $1,200. It's from a 97 TA LT1 with 50K. What do you all think? How much would it cost in labor to do the swap?

[bu-bye]

I could be wrong but wont the gearing be much different. That tranny was designed to be use with V8 power. The number of teath, pitch and size all plays a big part. you might be putting more load on your engine then with a V6 tranny. It might not be a big deal but it is something to think about.

[Silver3800V6FBodyKY]

<blockquote>quote:</font><hr>Originally posted by bu-bye:
I could be wrong but wont the gearing be much different. That tranny was designed to be use with V8 power. The number of teath, pitch and size all plays a big part. you might be putting more load on your engine then with a V6 tranny. It might not be a big deal but it is something to think about.<hr></blockquote>

Talk about putting too much load on my engine... I cruise 75 MPH @ 3200 RPMS, that's not good.

[Blue Flame V6]

Well look @ the gear ratios on the 6 speed they are lower than on the T5. Also as far as gears go and speedo the way I understand it it shouldn't be a problem because they use a pulse just like the T5 to read speed so they should plug in.

[Ex-5.0]

M5 1st gear ratio is about 3.75:1
M6 1st gear ratio is 2.66:1

You'll need to change rear end gears to at least 4.11 to get close to the stock M5/3.23 overall 1st gear ratio, otherwise 1st will feel like starting in second gear.

Be sure to be good and hook up the CAGS!

[Dominic]

Yes 4:10s work extremely well with the T56 due to the extremely tall 6th gear overdrive. For a V6, I would run 4:10s.

[bobzilla]

I've found a setup with everything I need except for the Center Console and the Bellhousing for $1,200. It's from a 97 TA LT1 with 50K. What do you all think? How much would it cost in labor to do the swap?


um, that's not such a killer price, you can get the enginge and tranny off ebay if you are patient for just about 2k. Still, I've thought about this type of mod as a stepping stone to an 8...Take a look, I think you might be able to get one with a damaged input for $900 or less,just seems on the high $ side.

[Deuce Bigs]

yeah that's not that great a deal. keep looking. i got my ls1 t56 for $500(of course i have to put it back together and it has no bellhousing so it may be the perfect candidate for my V6).

[Silver3800V6FBodyKY]

<blockquote>quote:</font><hr>Originally posted by Ex-5.0:
M5 1st gear ratio is about 3.75:1
M6 1st gear ratio is 2.66:1

You'll need to change rear end gears to at least 4.11 to get close to the stock M5/3.23 overall 1st gear ratio, otherwise 1st will feel like starting in second gear.

Be sure to be good and hook up the CAGS!<hr></blockquote>


I've already got 4.11s in the rear so that's not a problem. I'm probably go to lower my tire height too from 26.1" to 25" so that will help out some too. I'm still looking around on E-bay for the best deal. I can get an LS1 T-56 for really cheap, but the guys on here say that it might not fit.

[Blue Flame V6]

<blockquote>quote:</font><hr>Originally posted by Silver3800V6FBodyKY:



I've already got 4.11s in the rear so that's not a problem. I'm probably go to lower my tire height too from 26.1" to 25" so that will help out some too. I'm still looking around on E-bay for the best deal. I can get an LS1 T-56 for really cheap, but the guys on here say that it might not fit.<hr></blockquote>

It will fit but will require a bit of custom work to get it in.

[Silver3800V6FBodyKY]

Can I use the flywheel I have now? I'm still working on a deal.

[Blue Flame V6]

<blockquote>quote:</font><hr>Originally posted by Silver3800V6FBodyKY:
Can I use the flywheel I have now? I'm still working on a deal.<hr></blockquote>

I believe so.

[Deuce Bigs]

you'll most likely have to use the flywheel you currently have and an ls1 clutch.

[Blue Flame V6]

<blockquote>quote:</font><hr>Originally posted by Deuce Bigs:
you'll most likely have to use the flywheel you currently have and an ls1 clutch.<hr></blockquote>

No the LS1 clutch I think is to big for our flywheel. If he uses our flywheel and clutch then he would just have to change the input shaft on the trasmission.

[black34v6]

the spline count on the T5 transmission = 26
the spline count on the T56 transmission = 26

you shouldnt need to change your clutch at all, or the input shaft. what you do need to consider is that the T56 has a different bellhousing than both the 3.4 and the 3.8L engine. you need to custom fab something, possibly welding the t56 backend bellhousing (cutting where the bellhousing connects to the tranny off) and the front of a 3.8 manual..

good luck making it all work.
as long as you can get a bellhousing, the crossmember from a Z28, and any single-piece driveshaft (you could even use the two-piece, they are about the same length.) everything should work out fine. Do not get a T56 from a 1998 Z28 or T/A -- these are notorious for problems internally!

if you have questions and stuff, ive researched a lot -- feel free to email me, its in my profile.

-R