transmission issue...

[BobHyatt]

We ran our 2000 GT at the track this weekend (motor is stock, we are running 3.90 gears on an Auburn limited slip differential). Noticed zero problems at the track. During burnouts, backing up, etc. When we got home, we noticed the transmission could not be shifted into reverse. Goes in 1-2-3-4-5 just fine, but reverse is a no-go. Lever will move all the way to the right, and will go forward into 5th, but will not go backward into reverse. Doesn't grind. Doesn't make any noises at all. Just won't go into reverse.

Any suggestions on what might have happened? Bent shift fork? Anything else that will cause this? (yes, the clutch is adjusted properly, we have a manual-adjusting cable and it disengages cleanly. Car won't go into reverse with motor off either, so it seems like something in the shift linkage internally must have an issue...

 

[COramprat]

Could be the fork but I would think 5th would be a problem too. Bad synchro maybe?

 

[BobHyatt]

Could be the fork but I would think 5th would be a problem too. Bad synchro maybe?

we are going to open it up later this week to see, but I'm not sure a bad synchro would do this unless it somehow became damaged enough to prevent any sort of engagement at all. 5th is fine, the shifter will just not go into reverse, whether it is running, moving backward, or engine off...

 

[COramprat]

You are right. If the synchro was completely destroyed you would have an issue. I would think it would have been a progrssive issue and not in an instant. Could be a shift fork bent in reverse but you normally don't bang reverse and damage that fork. Maybe it moved on the rail or something. I'm betting it is something pretty minor since you aren't having other issues.

 

[darkside03gt]

I'am pretty sure that reverse doesnt have a syncro on it alot of trannys dont.

 

[COramprat]

I'am pretty sure that reverse doesnt have a syncro on it alot of trannys dont.

Pretty sure you speak the truth there. I'm thinking the lug or something came loose from the shift rail in reverse.

 

[fast97gt]

I'am pretty sure that reverse doesnt have a syncro on it alot of trannys dont.

i thought the t45 and the 3650s were fully sychroed, including reverse, and that was 1 of the differences between them and the t-5

 

[COramprat]

i thought the t45 and the 3650s were fully sychroed, including reverse, and that was 1 of the differences between them and the t-5

I've searched a little and haven't really found a clear answer. Maybe one of the lurkers who pop in here that may know will pipe up.

I'm still thinking it will be a minor issue.

 

[laserstang21]

in the t-45 do not have syncros in reverse. well i was having problems with it locking me in reverse then the next one it was kiking me out. so i got the 3650 and love it. have had no problems.

 

[BobHyatt]

this is a tremec in a 2000 gt. We removed the shifter yesterday to see if it was something silly like the nylon bushing cracking and not allowing the shifter to move sideways enough. No such luck. I did move the shift linkage by hand, and 1-2-3-4-5 all work fine, but it will not rotate left and then go into reverse...