Last year, I had the T45 transmission in my GT rebuilt, at ~185k miles. It recieved all new bearings, seals and upgraded syncros (kevlar?, from Hanlon Motorsports). It also has improved 1-2 and 3-4 shift forks and I buttoned everything together with a fresh clutch and turned flywheel. Everything felt great and worked perfectly.
Now, one year later with ~15k miles on the setup, I am seeing some signs of problems. Sometimes, the transmission will stick in reverse. So far, I have always been able to shake it out of R and continue on my way. The issue is pretty random, but seems to only happen on cold starts.
I have also noticed noise while cruising in 5th. It is somewhat load dependend, and only exists in 5th gear. There is no noise in 4th, so it is not road or rear end related. The noise sounds like a rotating type of grinding sound. It is fairly faint, but certainly there. The noise is similar to what you might hear if you spin a brake disk while the wheels are in the air. Just a faint smooth metal type grinding sound.
What are the possible causes of the issue? Can I expect to tear out the transmission soon, or could I keep driving it for years like this?
Now, one year later with ~15k miles on the setup, I am seeing some signs of problems. Sometimes, the transmission will stick in reverse. So far, I have always been able to shake it out of R and continue on my way. The issue is pretty random, but seems to only happen on cold starts.
I have also noticed noise while cruising in 5th. It is somewhat load dependend, and only exists in 5th gear. There is no noise in 4th, so it is not road or rear end related. The noise sounds like a rotating type of grinding sound. It is fairly faint, but certainly there. The noise is similar to what you might hear if you spin a brake disk while the wheels are in the air. Just a faint smooth metal type grinding sound.
What are the possible causes of the issue? Can I expect to tear out the transmission soon, or could I keep driving it for years like this?