AH-PSHAW

I did a search but found nothing on the internal problems of the t56. I have an 05 c6 z51 m6 with 92,000 miles and recently had to have the transmission rebuilt. It had a noise and wouldn't stay in reverse. I inspected the parts after I got my car back and the main shaft is totally worn out where the 5th&6th gear cluster sets. I was wondering if anyone else has experienced this and if it is a common problem. I haven't been able to talk to the actual trans shop that did the rebuild but the shop that did the R&R had not seen this before. If someone has a link to a transmission forum they could share thanks in advance.

0MomentumAutosports

Unfortunately it is fairly common.

AORoads

maybe ask this guy in post 1. http://forums.corvetteforum.com/c5-t...-rick-kim.html

AH-PSHAW

Thanks for the input. I have done quite a lot of research since I made the OP. What I found out is that this is a weak link in a good idea. I'm guessing that if you spend a great deal of time cruising at freeway speeds it is going to wear out and eventually need a R&R. One more example of engineering failure. Hopefully the upgrades are the answer. I have enjoyed every mile I put on and will continue to enjoy every future mile.

Rick@RKT Performance

This is common occurance on T56's. The updated TR6060's have splines for both (5th and 6th driven gears are 2 piece) gears which are much stronger.

AH-PSHAW

Thanks Rick, I can't really complain..... I have enjoyed every gear change I have made in 90,000 mi.

Rick@RKT Performance