Anyone know all the teeth count on both the US gsr and US LS tranny? I have 2 tranny and one is a LS and one is a GSR. I'm not exactly sure which one is which and im going to crack open the tranny to count the teeth. If you have a website or anything that tells you let me know.

 

Count the ring gear teeth. If I recall, the LS has 64 and the GSR has 66. The GSR will have more, anyway, even if those numbers are off.

 

save some time and count the teeth on the 5th gear (either side). the LS has 25:35; the GSR has 26:33. smaller numbers to count.