Possible Transmission Swap

First off, how can a manual transmission slip? I would think that a slipping feeling more than likely is just the clutch going out.

If you do wind up swapping to a 6-speed, these guys have all the parts you'll need. http://www.ddperformance.com/t56__6_speed transmissions.htm

Centerforce clutches=not a real good clutch...

I've heard of them going out in a few months before...

Throw a SPEC stage II in there and your problem will go away...

OHEY Fasterisbetter, i hate reading in here sometimes because I get so aggrivated. I have a centerforce dual friction in my 99 cobra with a rebuilt 3 times over t45 that may be chewed up from the dam clutch , the clutch has only 3k miles on and it already sux. when i was looking for clutches like 6 months ago, it seemed everyone said it was the best, damit but of course now i hear the complete opposite. i totally know what u mean by slippage and the speed is not up the rpms. same problem here! i started a thread called "losing power", that was my take on transmission slippage i guess. well anyway keep me updated because my car seems to be doing ok for now, i readjusted the cable. im soon to get 410 gears as well.

I find it interesting that we both have centerforce clutches and are having similar problems. for me, that is when i already have the clutch all the way out and begin to accelerate hard in 1st gear, the rpms are much higher than my speed, kinda hard to describe but you said it just right. I m wandering if maybe it is the clutch we have is actually slipping because my t45 is brand new, granted it is my 3rd one in less than a year...I dont even race my car. The clutch itself may be the problem and may be destroying transmissions as well. From what I have heard from many performance shops is that clutches like centerforce and spec are very hard on trannys because they work like an on/off switch. I have spent way too much money on my drivetrain already, so ill just wait and see how you make out ahha, maybe you will have better luck on fixing it. I could try and get a stock cobra clutch assembly put in for like $800 but I chose to get some 410 gears instead because this drivetrain problem for me at least, seems to be permanent. good luck and tell me what you hear. thanks