Jeff 97 Formula

How can I tell?

Ok, I was going about 23 mph, then I hit the gas. It immediately downshifted to 1st, but it felt like the RPM's were jumping a little. Once it got into second, it felt like something was slipping. The tires were not making any noise which is why I am concerned. Could be the tires, but I'm wondering if there is a way to confirm. Thanks!

EDIT: No SES light

performabuilt

iTrader: (25)

Well first I would try and duplicate it again and have someone watch the tires for tire or even wheel spin, Then if neither is present you have a slipping trans ,

Jeff 97 Formula

Just had it out, I think it was the tires. I did the same thing today, and felt the back-end sliding out as the car accelerated after the downshift (with the windows open I think I also heard the tires slightly). The car also feels normal when I'm driving normal.

The other night it was pretty damp out and moisture was developing on the car, so I think the moisture in the air had some effect on either the tires or the road. Not sure.

BlackHawk T/A

iTrader: (3)

The car should most definetely have enough power to break the tires loose doing a downshift to 1st, however you should not lose traction by "upshifting".

Jeff 97 Formula

Well, I have the HPP+ programmed for firmer shifts, and it definitely increased the tendency of chirping the tires when shifting into 2nd. It's just that when it's warmer out, I can hear the tires screeching, and sometimes it doesn't screech at all, just plants me further into the seat on the harder upshift.

This is with the stock tires (Eagle GS-C)

jpat1023

huh?? I break loose every single time on the 1-2 shift......my roomates z28 will lay down 2 big black rubber stripes on the 1-2 and 2-3......so I don't know what your talking about...

tunit

iTrader: (1)

yeah, my car does the same thing and i was wondering the same thing. but im sure its just the tires. its like you can feel and hear the car revving up but your going nowhere and hear no tires, just like a grinding sound kind of

BlackHawk T/A

iTrader: (3)

Guys I have an FLT Level 4 transmission, with a modified TransGo HD-2 shift kit, big pump and vacuum modulation. Trust me when I say that I am getting plenty of pressure.

What kind of tires are you guys running to spin the tires on upshifts?

Jeff 97 Formula

After driving the car today, I am more certain that it's the tires. I did not hear the tires screech when accelerating, but did feel the back end slide out a little.

Now, on a newly-paved road, I hit the gas at 20-25 and heard tires screeching immediately after the downshift, and felt a nice crisp 2nd gear shift.

Also checked the tranny fluid and it still looks new (it's about 500 miles old). Bright red-pink color, does not smell burnt.

RPM WS6

iTrader: (3)

I had the same trans (older version), it was an FLP (before there was a "T" ) Level IV in my '00 WS6. I had a 3500 stall, cam, full exhaust, tuning, usual bolt-ons. The car made 365rwhp/350rwtq with an UNlocked stall. I had NO PROBLEM getting the tires to break free on 1-2 upshifts. If the temp was anything below about 60* outside, I'd get a good bit of tire spin on the first couple of 1-2 WOT upshifts until the tires heated. This was with Nitto DRs.

As for downshifting, no matter what the outside temp was, they would always break free a bit with a WOT downshift to 1st until the rubber was hot.

My BFG KDWs would react nearly the same as the Nitto DRs, only they didn't get any better as they heated.