Clutch issue ?

[jondee86]

Just to try and narrow things down a bit, here are a couple of questions...
- Did you ever notice the car creeping before you changed the oil ?
- Did it start the first time you fired the engine up after changing the oil ?
- Did you fill the gearbox thru the side plug or thru the shifter hole ?
- How much oil did you fill into the gearbox ?
- Do you drift/race this car ?
- Do you make hard/fast changes up and down thru the gears ?
- Do skids or burnouts ?
- Do clutch kicks or shift locks ?
- When you drained the oil did you notice any metal in the oil ?
- Is it hard to select gears without forcing the shifter ?
- Does it make any unusual sounds when you drive it now ?
- Are some gears harder to select than they used to be ?
- Does the gear lever feel the same as before when you shift ?

You really only have two choices now. Either take a chance and drive
the car around for a while normally (no racing) and see if the problem
gets better or worse (yes, I'm a cowboy ). Or pull the gearbox out and
have it checked for signs of damage. If the only thing that is unusual is
the creeping in neutral and there is no metal in the oil or strange noises,
then there can't be anything major wrong.

Cheers... jondee86

[izanagi]

(06-04-2019 11:24 AM)jondee86 Wrote:  Just to try and narrow things down a bit, here are a couple of questions...
- Did you ever notice the car creeping before you changed the oil ?
I didnt notice anything.
- Did it start the first time you fired the engine up after changing the oil ?
It started first time.
- Did you fill the gearbox thru the side plug or thru the shifter hole ?
Side plug
- How much oil did you fill into the gearbox ?
As said in the FSM
- Do you drift/race this car ?
Drift
- Do you make hard/fast changes up and down thru the gears ?
I'm gentle with the gearbox
- Do skids or burnouts ?
NO
- Do clutch kicks or shift locks ?
Clutch kicks sometimes.
- When you drained the oil did you notice any metal in the oil ?
Nothing, no metal
- Is it hard to select gears without forcing the shifter ?
The 3rd gear has synchro problems. Cracking
- Does it make any unusual sounds when you drive it now ?
No unusual sounds
- Are some gears harder to select than they used to be ?
Nope
- Does the gear lever feel the same as before when you shift ?
Yes the same. Nothing changed.

You really only have two choices now. Either take a chance and drive
the car around for a while normally (no racing) and see if the problem
gets better or worse (yes, I'm a cowboy ). Or pull the gearbox out and
have it checked for signs of damage. If the only thing that is unusual is
the creeping in neutral and there is no metal in the oil or strange noises,
then there can't be anything major wrong.

Cheers... jondee86

[jondee86]

Well nothing obvious. Looking at the inside of a T50 gearbox when
the box is in neutral with the engine idling, it can be seen that some
parts on the output shaft are being driven by the countershaft. The
driven parts are made to spin freely by being mounted on bearings.

In general undamaged ball, roller or needle roller bearings have low
friction and transmit negligible torque between the inner and outer
race. But if a piece of debris gets into the bearing and wedges itself
between a rolling element and a race, the rolling element may become
a sliding element. This increases friction and the amount of torque
transmitted from the driven part to the shaft it is spinning on.

The particle of debris may be very small, but bearings have close
tolerances, so something the size of a grain of sand can be a problem.
However, if the debris is a bit of gasket material, tiny piece of brass
or similar "soft" material, and it is only causing one rolling element to
skid, it may well go unnoticed for a long time and cause little damage.

On the other hand, if it is a "hard" particle like a flake of hard surface
of a gear, it may dig into the bearing race and lead to early bearing
failure. Without using sophisticated vibration/acoustic analysis and
bench testing the gearbox, it is near impossible to diagnose what your
gearbox problem might be. It may be a synchroniser ring dragging or
some other oddball event.

But back in the real world, if you continue to drive the car and pay
close attention to the behavior of the gearbox, you just need to stop
on a level surface every now and then, and see if the car still creeps
in neutral while idling

Cheers... jondee86