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01-17-2009
Hi!
i have a 1995 GP 3.1L
for the last 3-4 months, when the engine is cold, the tranny make a one time "knock" every time it's shifted from P or N to D or R (especially to R...) (and the engine is "moving" a bit).
i have changed oil & filter but nada.
however, when the engine is at working temp. (or even less) the knock is disappeared.
the tranny has been rebuilt approx. 90K miles ago.
any ideas?
thx ahead.
01-17-2009
Check your mounts, the sound may just be from it moving around when you shift, the engine moves most in the park to reverse change, and next most is in the drive to reverse change
01-17-2009
thanks!
i have replaced the bottom mount and the 2 front mounts (only the big ones, without the "forks").
is there anymore mounts somewhere???
01-17-2009
My car has two lower, and two upper(torque straps), but I don't know how the 95 3.1 was setup, someone else will need to chime in for that answer
01-17-2009
so could it be just a faulty engine mount? nothing in the tranny?
(i really don`t want to rebuild it again...)
01-17-2009
It is possible as there is a lower engine mount in addition to the lower trans mount. You are likely getting this clunk when cold because the engine idle rpm is higher and also when the trans is cold and the fluid is cold and a bit thicker the pressure is a little higher also which will cause a slightly firmer engagement. Also check all of your exhaust system and exhaust hangers to make sure it is supported properly and not causing the noise as the engine will rock back and forth quite a bit when going in and out of gear. You may try having someone else sit in the car and go back and forth between reverse and drive while you have your head under the hood trying to isolate where the noise is really coming from.
01-18-2009
i have replaced all engine mounts. still there is this knock while the engine is cold.
could be a rpm problem? I've noticed it's taking longer period to reduce to idle rpm when engine is cold...
01-25-2009
Hi!
I have noticed on my other car that even on 2000 rpm when i shift the gear the rpm is reduced and there is no knock sound.
is there any mechanism to do so on the GP?
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