tranny slipping
 

Hey guys and gall,,question on my wifes 99,its a 3.8,,im trying to figuer what tranny is in it,,slipping badly in first,,worst when cold,,damm automatics,,anyhow here is the vin in case its needed to figuer it out,,
1fafp4046xf189296
thanks:banghead:

Your auto trans is a 4r70W. First thing to do is to check the fulid level. If it is low the symptoms will be amplified when the trans is cold. There are no adjustments for this trans though and slipping can be a bad sign. Is there a flashing o/d light or check engine light? Wheneither of these are occuring the trans will automatically stay in 2nd gear and this will give a slipping sensation.
I will check this thread often I was a Ford dealer trans tech for 10 years before starting my own business. I hope this helps.

Hey thanks for the reply,,i ended up pulling it out ,,lost first gear,,replaced all of the clutchs,some disk and one band,,also installed a boust valve for 1st to 2nd,,works good,,releay good,,cant complain on it falling,had 230 on original tranny,,