New LS1 Owners - Newbie Tech - Wheel Spin Feeling on Highway

ive noticed this alot lately. i will drop it into 3rd (i have an automatic) and punch it from around 65-75 and it feels like the back tires are spinning. they are 18" nitto 555's with about a years use (5k miles maybe). my car is a 99 T/A with 126k on the clock and 323 gears. i cant tell you the last time the rearend fluid was changed. i have never done it but the tranny has new fluid. what could this be? please dont give me bad news saying its the rear or tranny, that would just suck completely

sounds like the tranny is slipping to me, i wouldnt think the rear would onl act up in 3rd gear from a roll. but with the tranny downshifting it sound slike thats your problem.

Did you just have the tranny flushed?

ive noticed this alot lately. i will drop it into 3rd (i have an automatic) and punch it from around 65-75 and it feels like the back tires are spinning. they are 18" nitto 555's with about a years use (5k miles maybe). my car is a 99 T/A with 126k on the clock and 323 gears. i cant tell you the last time the rearend fluid was changed. i have never done it but the tranny has new fluid. what could this be? please dont give me bad news saying its the rear or tranny, that would just suck completely

how must HP ur car making?my do that all the time even I dont have to into 3rd,my traction control when on.for me is normal if ur car have power.





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2001 WS6 Transam convertible

how must HP ur car making?my do that all the time even I dont have to into 3rd,my traction control when on.for me is normal if ur car have power.

What? Want to try that again but in english this time haha. Anyhow to the OP I think it sounds like your transmission is on its way out the door, mine was doing the same thing but on the 2-3 shift with about 115k on the clock. You mentioned you have new fluid did you do a tranny flush or just a filter change? I have heard tranny flushes on high mileage 4l60e don't mix. So just do what I did and buy a PerformaBuilt Level 2 and a stall and have no worries :)

Again, sounds like the trans is slipping.

manual shifting an auto is 1) gay (unless its a manual valve body, which you don't have) 2) terrible for the 4l60e.

also trans flushing the 4l60e isn't the greatest idea in the world. Some people swear by it, but everyone ive seen done has had the trans go out within the year.

sounds like you need a rebuild.

i didnt flush it, i changed the filter with then i had to change the fluid. and i dont manually shift it. i just dropped it into 3rd instead of having it in OD. i just bumped up the rpms to get a better run

i didnt flush it, i changed the filter with then i had to change the fluid. and i dont manually shift it. i just dropped it into 3rd instead of having it in OD. i just bumped up the rpms to get a better run

ah. my bad, I thought you were manually shifting. reguardless it sounds like its time for a rebuild. Damn, gm can make a hell of a powerplant, but the drivetrain isn't worth shit.

yea its retarded and slow. plus i know that will fuck up the tranny

The new fluid in tranny might be causing it to slip a little.

it use to vibrate alot in 3rd when i would drop it from OD and cruise but i figured it might be a trans mount or motor mount just being worn out

If I drop mine from OD to D at highway speeds, it redlines extremely fast, but im pretty sure its not slipping I think its just a short gear. If its real wet out I can spin my tires at 60.

was the old fluid burnt when you had it changed?

If I drop mine from OD to D at highway speeds, it redlines extremely fast, but im pretty sure its not slipping I think its just a short gear. If its real wet out I can spin my tires at 60.

see its not wet though. maybe alittle cold (60's) but my tires are heated up. and it jumps to about 4k around 65.
i dont remember if it was burnt but their were no shavings or anything

If your mashing the gas at 4K RPMS in third its gonna redline real real quick in an auto, pretty much as soon as your foot hits the floor. Does your car accelerate in a quick burst then redline or just rev up freely as if it were in neutral?

wheelspin in 3rd? do you mean that it go sideways or does it just rev and go nowhere?
either you're making something like 600+ rwhp or your tranny may need a rebuild.

was the tranny fluid dark?
these are random pictures showing color of tranny fluid.
http://www.adamstransmissionshop.com/transmissions/images/transmission_fluid_types.jpghttp://www.stripersonline.com/surftalk/attachment.php?attachmentid=92909&d=1199650891

its not just straight redlineing like it is in neutral. it just has the feeling of wheelspin but not spinning the wheels. its the best way i can describe it. it wasnt doing this before so i didnt even think about looking at the fluid when i changed it

you could check the fluid now and see how it looks. if its new fluid, it should look bright pink/red.

Make sure its not low on fluid either.