Rough shifting automatic transmission in 2002 Oldsmobile Aurora 3.5 litre .
I have a 2002 Oldsmobile Aurora 3.5 litre I bought new and it now has 80,000 miles on it.
It is now beginning to shift rough ( on occasion ) when up shifting from 2nd to 3rd . The
fluid is at the proper level and it looks clean on the stick. Most times it shifts properly but
when it dose shift roughly it doesn't seem to matter if the car is warm or if it's cold .
Do you have any suggestion what may be causing this problem and what I could do to
correct it ?
Transmission has been abused and compromised the integrity of the fluid, such that your filter is choked off and internal pressures are not right...bring it in for transmission service, they will change the filter and be sure to ask them to empty and refill the torque converter itself~
I had that same problem with my Buick, so I serviced the transmission fluid changed the filter and found varnish in the old screen so when I refilled the fluid I added a quart of transX to the fluid and started driving it as I normally did, it took about 3 days but it started to shift nice and smooth and was still doing so when I sold the car a year later. Maybe it will help yours.
if it is auto replace the atf oil and add in some additive from your local automotive store and it will soften up the seals and sometimes make shifting smother if the seals are the problem if not take it into a shop