Auto trans slips - 2003 Buick Rendezvous

no response so
so less
1:will it slip parked, idling, in drive,foot
on brake,? then advance throttle and see like 2000rpm but fails and goes why higher?
that is the stall test failing,
2:fail in reverse, parked?

fail only moving
gee,,,, can you say more than SLIP?

How many miles have you done? Is the trans correctly filled with oil? Why do you think its slipping, when it changes up is there some delay in forward pull from the engine that gives similar symptoms to clutch slip? Its not that old and a well maintained trans that hasn't done much towing should do 150k without problems. Towing heavy trailers kills auto trans.

• check your "Engine Coolant Temperature Sensor" ECTS, make sure all your connections on the transmission are secured. I would try a bottle of Seafoam, or some Transmission cleaner (as a last resort), or some LubeGard from your auto parts store.
• There like several types of it, check the website Lubegard.com for the specifices on which one to use. I've heard Transmission guys, swear by this stuff, that it will fix a lot of problems.
  But I wouldn't try it on a CVT transmission, or any kind of transmission that has a CVT belt drive system.

I would have a trans service somtimes its just a clean up that needs done

You have an auto? Or the clutch is slipping in a manual?

If the first, the most likely cause is that your auto trans fluid is low. Check the level with the engine idling, and top it up via the dipstick tube if needed. If that was found to be OK then the trans has an internal problem and you will need to take it to an auto trans mechanic.

If a manual then the clutch is worn and must be replaced. Slippage is the classic sign of that. It cannot be fixed by external adjustments.

thats because it is clutch slip ,auto boxes have a clutch in them ,the front clutch ,also check the oil level

Check tranny fluid level

The trans has a built in limp mode if it detects a problem. More than likely there is something else wrong,

Try to reset it first. Turn the vehicle on and off 3 full times and then start it and see if it starts out in first. If you then fell it lurch and go back into limp mode have it scanned to see. It could be the trans computer, a sensor or a hard problem internal to the trans. Hope this helps.

28 years rebuilding trans and factory trained by chrysler on that trans.,

CHECK THE TRANSMISSION FLUID TO SEE IF IT IS LOW. THERE SHOULD BE A COLD LEVEL AND A HOT LEVEL. WITH THE TRANS IN PARK AND HOT, ENGINE RUNNING PULL THE DIPSTICK TO SEE IF THE TRANS NEEDS FLUID. WHEN ADDING, MAKE SURE THE PROPER FLUID IS USED. IF THE TRANS FLUID LEVEL IS OK BUT THE TRANS FLUID SMELLS BURNED OR IS VERY DARK THEN HAVE THE TRANSMISSION SERVICED WITH FLUID AND FILTER. I HOPE THIS HELPS. THANKS FOR USING FIX-YA AND FOR ANY COMMENTS. BEST OF LUCK

yep, sounds like your transmissions on its last leg, mabye you can get by, by starting in 2nd, if you have the option lol, but auto tran's are pretty cheap on ebay or try www.supraforums.com seen one for 300$