Odd Shifting

[SHObill]

I have a '90 MTX that i picked up and about two weeks after it started shifting very stiffly and the grinding into gears even when i had the clutch pushed to the floor, especially in reverse. I've noticed it is very driveable, but first gear seems to be very notchy and stiff along with the other gears. The stiff shifting and grinding seems to get alot worse when the car is warm and has been running for a long time, when its cold it doesnt grind but is still stiff. I cannot shift quickly when i take it to high RPM's, it takes a good push. I have been babying the clutch and barly ever have done this. When i bought the car i could shift it into the gears with just one finger. The tranny was re-built less than a year ago and about 1k miles (id have to look on my reciepts for sure). I called the owner and he said the tranny was built very well and he said that 99% that its the throw-out-bearing, and that he has had problems when the re-built trans and new stock clutch and TOB was put in. Is the problem the TOB?

 

[IT-Purrrs]

Ops posted under my Dads screen name.

This is me.

 

[SHOman247]

could be a few things. What kind of fluid are you using? Is it a cable or rod shifter? Is the clutch pedal heavy or hard to move? Is the engagement smooth or does it sorta bind or squeek or make or noises? If you want i can take it for a ride and compare it to my 91. Did you have beth look at it yet?

 

[IT-Purrrs]

could be a few things. What kind of fluid are you using? Is it a cable or rod shifter? Is the clutch pedal heavy or hard to move? Is the engagement smooth or does it sorta bind or squeek or make or noises? If you want i can take it for a ride and compare it to my 91. Did you have beth look at it yet?

The fluid has been changed 3 times id have to call the other owner to find out exactly what fluid he used, but he said it was really good stuff. Its been changed to a rod shifter. The clutch pedal is nothing out of the ordinary, it has never changed and has always been pretty easy. The engagement is very smooth, but its just hard to put in the gears, and it grinds sometimes. Yes Beth looked at it and she said tranny only because i told her that there was RTV in the tranny, but when i called the owner he said there wasnt. I did a test where i shut the car off shifted through all the gears and it shifts beautifully (if it did not shift good it would be the sycros in the tranny, thank you search function). Only when the car is running it has this problem.

Thanks Greg, you should come over for a ride sometime.

 

[RJ-92]

Could be TOB issue. Did he have the flywheel resurfaced when the last clutch was put in? Make sure the SFBs are OK. If they're shot it will make a big difference in shifting as well.

 

[IT-Purrrs]

Could be TOB issue. Did he have the flywheel resurfaced when the last clutch was put in? Make sure the SFBs are OK. If they're shot it will make a big difference in shifting as well.

He put a SS 8 or 9 lb flywheel in there at the time, and he put brand new (rubber) sub frame bushings in at the time. Could something be loose on the rod shifter?

 

[SHOman247]

the rod shifter stablier bar bolt could be backing out which would cause weird shifting and grinding but the shifter patern would start to move as well.

 

[LOUDSHO92]

It could be motor mounts. When I ruined mine it would be quite hard to get into gearespecially under high RPMs. I would check your mounts.