I got this on my setup, makes going from 5 to 6 easy notch the existing hole back 2 inches and reuse 5 speed boot. Only thing i wish i had is a piece of foam to kill the road noise like the 5 speed had.

 

Which gear ratios did you go with in the T56? 2.97 1st or 2.66 1st?

Looking to do the swap in my '02 ECSB.

 

I have an F-body trans so it has the 2.66 first gear. It works great with the 4.88's. You could also go with a gto trans that has the 2.97 if you wanted but the 2.66's perform fine to me.

 

For a truck, most will say the GTO T56 is more ideal, but they are harder to find and usually more expensive. I went with an F-body LS1 because I got it got under $1k.

For reference, the 2.66 gives me a top speed in 1st of 47mph, while 2.97 would give me 42 mph, at 6500 RPM, 4.88 gears, 31.22" tires. It's up to you whether or not that's enough of a difference.

Also the GTO trans will let you spin your driveshaft slower for the same speed.

 

great work !!

please tell me where did order all the swap parts .. also it's will be great if you post the parts number ..

 

For front shift conversion call Keisler.

As for T56 swap stuff-

There are a bunch listed in this thread.

https://www.performancetrucks.net/fo...thread-381877/

Not sure what pages but you'll just have to dig through. I read through this thread a several times before I did my swap, and made a list of parts and part numbers. Although mine was easier since it was already a manual.

Also got my parts from different places. sdparts, classifides (here and on tech side), dealership, and summit.

 

I just finished this mod and found your post helpful. Thank you

 

Im starting my '87 LS/T56 soon and this thread has been a GREAT start in my research.

Since Keisler is out of business, I have found the Front mount shifter conversion here...

T56 6 Speed Transmission Parts & Rebuild Kits

Thank you for taking the time to make this thread.