Mr CHI

iTrader: (3)

When I cruise on the highway for long periods of time (45-60 minutes) and all of the sudden decide to floor it from around 50-60mph, the rpm's will shoot up to ~3k but the car will stagnate and will not pull.

If I floor it from 50-60mph, let off for a quick second and get back on it, the car pulls fine. Around town the car shift perfectly and even getting up to speed/ aggresively rolling into the throttle. From a dig it shift/pulls perfectly as well.

Sometimes, There's a slight *clunk* from the rear when I accelerate so i think i need a new trans mount, but is that where my initial problem is coming from?

performabuilt

iTrader: (25)

If you mean you floor the car and the rpm will only go to 3000 andthe car does not accelerate further I would suspect and engine running issue not a trans issue