Clunky/notchy F5M42 transmission

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

Microstar - 23 Apr 2005 01:04 GMT

Hi

I have a 1995 Mitsubishi FTO (front-drive sports car with 2.0l V6
engine). It uses the F5M42 five-speed manual transmission, as used on
many other Mitsubishi cars.

The car has only covered 20,000 miles before I bought it and generally
is in excellent condition. I have one problem in that the gearshift
1-2 and 2-3 is very notchy. 2-3 grinds if I shift quickly; its OK if I
pause in neutral for a second. Strangly, I can do a fast 4-3 downshift
with no problems at all. Shifting 2-1 is very difficult unless the car
is stationary.

I have chnaged the transmission fluid to Redline MT90, but it is no
better.

Any suggestions for improving my gearshift performance, short of
pulling the 'box apart for new synchros?

Reply to this Message

Stewart DIBBS - 23 Apr 2005 13:57 GMT

> I have a 1995 Mitsubishi FTO with the F5M42 five-speed manual
> transmission,
> I have one problem in that the gearshift 1-2 and 2-3 is very notchy. 2-3
> grinds if I shift quickly

Improper clutch release is the main cause of notchiness other than synchro
wear. There's a freeplay adjustment on the shaft that goes into the clutch
master. Pedal freeplay should be about 5mm before the master cylinder starts
to move. Make sure the slave cylinder is not leaking. Make sure its the
correct diameter. If the slave should be a 13/16" and has been replaced with
a 7/8", the clutch won't release properly.

If the car really has done only 20,000, and the above does not solve the
problem, I'd suspect its been abused. In any case, you're facing at the very
least, dropping the transmission to inspect the clutch (which may be the
problem) and looking at and maybe replacing the synchros.

Stewart DIBBS
www.vysor.com/lancerproject

Reply to this Message

Richie Rich - 25 Apr 2005 15:05 GMT

I am not familiar with your exact application, but I had similar symptoms
when my clutch master cylinder was bad.
If you have a hydraulic clutch, I'd look into it.

> Hi
>
[quoted text clipped - 14 lines]
> Any suggestions for improving my gearshift performance, short of
> pulling the 'box apart for new synchros?

Reply to this Message

Outlander - 27 Apr 2005 00:03 GMT

> I am not familiar with your exact application, but I had similar symptoms
> when my clutch master cylinder was bad.
[quoted text clipped - 18 lines]
> > Any suggestions for improving my gearshift performance, short of
> > pulling the 'box apart for new synchros?

The clutch cylinder advice is VERY good!

Reply to this Message