I have a 2000 Crown Vic (Police Interceptor) and the tranny slips.
Sometimes it will not shift into OD when i know it should, and then
finally it will, not redlining before it does, but you can just tell
when it should should, and its going beyond that. Also under full
throttle, it will stay in gear and not shift up sometimes, then when
it shifts into gear (99% smooth, 1% of the time it shifts really
hard). My friend has a 96' ford ranger and is having similar
problems. I have read on a few forums that a tune-up would help.
Does anybody have any troubleshooting tips or things i can try?
It does not sound like you are describing a "slipping"
transmission. Rather, it sounds like you may have an erratic
shifting transmission. Your transmission is electronically
controlled and may store fault codes to aid in diagnosis.
You may have a very simple problem like a bad MLPS sensor
(nuetral switch) or just a loose connection. Youyr car has
what is called OBD2 emissions control system. It can store
quite a bit of info on the engine, transmission and
emissions system including fault codes. If you have
something like an Autozone in your are, they may read any
codes for you free of charge in hopes you will buy the
repair parts. A dealer can certainly do this for you to a
much greater depth and degree of completeness as well as
many well equipped independant shops. If you want to try
one of the freebie services, make sure you write down the
exact code and fault description given and post them back
here. There are a couple of very good and helpful people
here to help you figure out how to correct the problem.
Rest assured that this problem will get worse and may result
in extended collateral damage to a now easily repaired
transmission if you continue to drive it this way.
thanks man, i replaced all the spark plugs due to a recommendation
from a person on http://www.crownvic.net and it sure seems to have
fixed it, a few of the spark plugs looked pretty bad physicalled,
allot of black, 2 plugs had very shallow gaps, much tighter than the .
054 that autozone told me it should be. I couldn't tell that it was
running rough, but it feels completely different now. you can hear
all the engine sounds on my 89' VW Golf, heck you don't even need a
tach, it has no noise damping material at all, the Vic, you can barely
hear it running with the windows up! I'm gonna have a shop do the
tranny fluid flush, just for best results.. thanks for your
Thanks for the feedback. One of the basic rules of
transmission diagnosis is to be sure the engine is properly
tuned. Just how thw hell could the plug gaps close if they
were set correctly when installed? Or, were they fouled that
bad. The 4.6L V8 usually runs a lot cleaner than that. If
they were fouled that bad, you may want to keep an eye on
oil and fuel consumption for other problems
The first thing you should try, is a transmission fluid change... pretty
easy on these cars, drain the torque converter while you're at it, and
throw in a liter of transmission slip fix (lucas).
i bet that will solve it...
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