wide open throttle issue

[jgibby]

I hope someone here can help me. My car drives great except for WOT when the outdoor temperature is cool. Like when temperatures outdoors go below 60 degrees. If I punch the gas WOT I get this nasty popping/grinding noise, very similar to what a stationary burnout sounds like, and the car does not accelerate. if I punch it at 45 mph for example, my revs shoot up, the boost kicks in and rises as it should, I just get this weird rear end noise and if feels like I'm spinning in place. It almost feels like when you miss a gear or the clutch slips on a manual. I thought it could be the torque converter so I scrapped the stock piece and added a TCI streetfighter. This did not solve the issue. But if i accelerate half throttle I take off normally with no problem. The car drives completely fine as long as I don't go WOT when it is cold out. Could I just be spinning my tires? I wouldnt think so because the car does not get squirrely and fishtail like i would expect with a rolling wheelspin. Another thought is the differential starting to fail. I dont think it could be engine/fuel delivery/timing since i don't get an engine light. The only reason I can think that cold weather would make a difference is maybe cooler temps mean more power, and if somthing is starting to fail, the extra power just excacerbates the problem. Any thoughts on this?

 

[CPman]

I take it your running some sort of supercharger ? If you think the engine is performing normally I would look into the trans and or the rear diff. I would think if your seeing RPM that is not being transfered to the wheels, the trans may have issues. What does your tranny oil look like. If it's burnt, that would be your first clue.

 

[hammeron]

i have to go with the transmission, because i
just don't see what else it could be based on
your description.