Hello Group,
Me (and my bro) recentlty posted some questions here regarding my VH
commodore (202 engine/trimatic).
The transmission (trimatic "L L") was slipping between gear changes.
We now have a workshop manual, and thanks to the advice here we have done
some work on it.
We purchased a new modulator and transmission service kit.
The original modulator was leaking fluid slighlty so we replaced it with
the
new one and checked the vac*** line and there is was no leaks or blockage.
Unfortunately, this made no difference. Still slipped between 1st & 2nd
(revs out on change) and slow to go into 3rd.
After removing the oil tray we were happy to see no metal residue. The
servo
band housing had a 3-4mm layer of grey sludge at the bottom, but no metal,
so we think that's a good sign.
We adjusted the band as per specs as best we could. Unfortunately the
torque
wrench we have is a bit heavy duty so it was hard to get accurate.
We tightened to 4.7nm (3.3ftlb) and backed off 4 1/2 turns.
This definatelty has made an improvement - If the engine is not under too
much load it now changes smoothly between 1st & 2nd, still a bit sluggish
going into top gear though. Under load, it will rev out between 1st & 2nd
but no where near as bad as before.
* Should we tighten the band further? it seems this would be the way to
go.
If the band is overtightened what would the effects be?
* Or is the modulator playing a role here - we noticed that the new
modulator has an adustment screw on the inlet side.
(the previous modulator didn't have one, or was removed) Should it be
adjusted?
Also, one thing that still bugs us is that if the ****ft is put into 2nd,
it
will change between 1st & 2nd fine. - Why is this the case.
Your advice would be appreciated.
Steve.
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