WTF is wrong with my tranny? It's a 99 TA LS1 Auto with 36K on the dial. At WOT, the shift thru 1st and 2nd is great - but I'm hitting the rev limiter at the top of 2nd at about 6100-6200 rpm's and it won't shift until I let off the gas abit.

After experiencing that twice last night, the tranny has been acting kinda funny during shifts. While in D (which is technically OD) I will be cruising at about 60-70mph at 2k rpm and when I give it alittle gas, it revs up another 1k before it settles back down.

NEED HELP!!! The only mod I have is a series 50 FM muffler.

KASR

 

When is the last time you changed your trans fluid and filter? Do you have a trans cooler? Are you continuously doing full throttle shifts? WJ. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

 

Ahh yes.
My car started doing that with the addition of a ST3500, then once I added LT headers it REALLY started doing the EXACT same thing.
WHY it happens I'm not sure. I will take it to a local shop that does a quick LS1Edit tune for $150. They are gonna raise rev limiter (main problem) remove TM, and adjust the shift points.
Beyond that, someone else should interject. Get the small tune and that should take care of your problem.
Nick

OH - Look at your trans fluid. If it is not BLACK you are all good.

 

Same thing was happening to me with my Vig 3200 and the Mac's.

Solution: We installed an Aftermarket Oil Pan and the problem went away.

 

KASR, the 4l60e is touchy when it comes to having the right amount of fluid in it. If you ahven't done it in a while, change filter, sure a deep is always a good piece of insurance, running a cooler is good too. Check, recheck and check again the fluid level. When mine did this at the track, on 2-3 shift only, I was low about 1/2 pint, like a tiny bit on the stick from the full mark. Tha to me is just too touchy. Good-luck.

Charlie.

 

Check the fluid level when hot. If the level is fine try lowering the 2-3 shift point a few hundred rpm. If it still does it it's probably time for a tranny rebuild. Go with Alto clutches and a kevlar band.

Moving to Drivetrain.. <img border="0" alt="[Burnout]" title="" src="graemlins/burnout.gif" />