Denis Roy wrote: > My 2000 chev venture trans occasionally slips momentarily when first > started. It happens most noticeably at the cottage where it is parked on a > grade. It feels like the park brake is set for a few seconds and then > clunks into gear. The rest of the day it is fine, even pulling my 2500 > pound boat. Is this a sign of expensive problems to come or can this be > something minor?
Dennis,
Here are a few things for you to check:
1) One cause could be the transmission fluid level.
Check the fluid level of the auto transmission. (Your vehicle operator's manual should show the procedure for this.) If the level is too high or too low, your hydraulic system won't function properly and cause the problem you are experiencing. Either add or remove as necessary. Alternatively, you can have the fluid and filter changed. That often clears up many problems.
If the fluid was low, you could have a leak. If it was to high, someone simply added too much.
2) If the fluid level is okay, then check if the fluid is discolored (blackish/brownish) and/or has a burned smell. If so, your fluid is bad and has to be changed. This is from overheating which could happen from pulling your boat. (Do you have a trans cooler?)
3) Is the fluid milky or bubbly? If so, your fluid is contaminated with coolant or air. If the fluid is milky, you'll have to check the transmission cooler for cracks. If it is bubbly the whole transmission should be checked for air leaks.
4) If all the above are okay, then the bands (if adjustable) may need adjustment or the fluid pump is bad.
5) There are other things that a good technician can find.
My "gut" feeling is that the trans fluid and filter need to be changed, seeing as you pull a boat and the vehicle is only 4 years old.
Hope this helps.
Good luck.
Mario