2002 Pontiac Bonneville Logo

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Posted on Nov 06, 2017
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2002 Bonnville, auto trans, shifts hard into gears and "misses" or "hiccups" on the expressway. Trans seems to "slip" back and forth. Does this when car is cold. After sitting for an hour or two, it drives fine. Service engine light just came on today. Problem has been going on for a few weeks now.

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Rj Right

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  • Expert 157 Answers
  • Posted on Dec 17, 2017
Rj Right
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Sounds like contamination of the trans fluid as condensation may be an issue since it's only doing it while cold you may have particles of water in the fluid and it freezes. A transmission fluid & filter change may help but cars need particular fluids nowadays and using wrong fluid may damage components. Always check with the dealer for proper types of fluids.

5 Related Answers

Anonymous

  • 61 Answers
  • Posted on May 03, 2009

SOURCE: auto trans shifting VERY HARD, possible cause?

It could be several things but I will give you a few ideas anyways to try and avoid the costly Ford dealer mechanics. Check your transmission fluid to make sure that it is full and that is still good and red. You may also want to just go ahead and change your transmission fluid but when you do so remove your transmission pan. Inside your transmission pan is your automatic transmission fluid filter screen. Make sure to clean it thoroughly and put back on filling the transmission with new fluid. Cleaning the screen is probably the most likely thing that will help. You also might want to consider using a transmission fluid additive that will help it shift easier. I've had pretty good luck with Lucas's products. Hope this helps. Be sure to let me know how it goes and if you need more help clarifying. Goodluck.

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Mike Price

  • 3 Answers
  • Posted on Dec 09, 2008

SOURCE: 95 ford probe se auto.

Automatics on some Ford Probes are prone to failure under certain circumstances. I say this because I own a 1994 Ford Probe GT auto. Have had it since 1996. It is now my winter car only. AWESOME in the snow and ice btw, but only with good tires. Get Yokohama Ice Guards!
I have twice had the transmission fail. It would start out as a slipping between 3rd and 4th/overdrive, and would do this for 3-4 weeks before complete failure would occur, after which I then would be limited to 1st and 2nd gears permanently until repaired. And both times, it was brought on by cold weather. Something about extreme cold seems to cause these auto trannys to stick, or fail.... The first time I had I repaired, the cost was $2500 but I had a 3rd party warranty.

I also know that there have been problems with inefficient transmission oil coolers on these cars, causing premature overheating of the transmission fluid. Some Probe owners installed aftermarket oil coolers as an additional or replacement cooler.

Is your transmission model the 4EAT? If so, it's probably on its way to 3rd & 4th failure.

Mike In Minneapolis

Anonymous

  • 42 Answers
  • Posted on Feb 13, 2009

SOURCE: 1999 ram auto trans wont shift into park

you could need a throttle linkage adjustment. first check to see if your ram will start in "park" and "neutral" only. if it starts in any other gear=faulty neutral safety switch. replace. ok, now check linkage for proper adjustment...with engine off and in park...remove intake housing..disconnect cableend from attatchment stud on your throttle body..slide cable off the stud (carefully)..verify that the transmissionthrottle lever is fully forward (idle) position..and verify that the lever on the throttle body is at curb idle pos..insert small screwdriver under edge of the retaining clip and remove..center the cable end on attatchment stud to within 0.04", or 1mm. install retaining clip onto cable housing..check cable adjustment..be sure trans throttle lever and throttlr body lever move in sync with each other.

Anonymous

  • 8 Answers
  • Posted on Mar 27, 2009

SOURCE: slipping auto trans in 94 chevy truck

actually i would say no because there are 6 cyl transmissions with 4 frction plates and v8's have 5 friction plates in the forward planetary gear

Molson02536

Harvey N Tawatao

  • 3854 Answers
  • Posted on May 25, 2009

SOURCE: 1998 pontiac transport 3.4 auto leaking trans fluid

It sounds like the Transmission line has a leak. Check the transmission line from the transmission to the radiator. You have two steel lines which runs to and from the transmission to the transmission cooler in the radiator. The line could be corroded and may need to be replaced, good luck and service the transmission too. The transmission on the transport are know to have problems when ran low on fluid or dirty transmission filter.
Good luck and hope this helps.

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