91 I series with the 4T60e tranny problem

[J.r. Patton]

the tranny is whining pretty loudly at times it shutters in 1st and wont shift past 2nd. then other times its great! some say the filter could be clogged. I know its running about a year old filter and fluid. Im just looking for opinions on what to do with it or possible solutions

[Crazy K]

if it runs pretty good some of the time... lets get a bit more info. when does it act the worst? when cold, when hot, after long drives, etc?

 

what type of fluid or filter did you use? I am now using vavoline maxlife in the gallon jugs which is designed to meet dexron VI specifications, (though their viscosity is slightly higher, iirc) wihtout the price tag of being licensed.

[J.r. Patton]

Jiffy lube serviced it with dexron 6. it does its best when its cold.. I can drive it about a mile then it fucks up.. but today I drove about a mile and it messed let it sit for about 30 minutes and it drove perfect all the way back to the house.

[Crazy K]

Jiffy lube? did they really change the filter or do a crappy powerflush only?

 

Does it have a stock transmission cooler? some 3800 cars 91-93 had it. if not, go to a j/y and get one from anything 91-93 that has a 3.4 or 3.8, as it is a direct bolt on.

[J.r. Patton]

it has its factory cooler. They changed the filter I watched em

[ron350]

Did the problem start before or after Jiffy Lube put Dex 6 in it?

[J.r. Patton]

about a year after.. I personally changed the filter and fluid and put some trans-x in it.. Does great so far!

[ron350]

My 96 Regal will whine and have mushy shifts if I use Dex6.

Some transmissions just need to stay with Dex3.