Matatk wrote:
OK, so here's the deal. I installed the new superram intake on the car and took it out for a test drive. Everything is in order, tv cable set, etc. First off, I have to say the new intake makes a lot more power than the old one. I think that might have some effect on this issue. When I had the trans built with the motor swap, I told him to build it for 400 hp. I think he just used stock clutches, etc. Hey, for the price I paid I can't complain. My trans was on its way out anyway. Fast forward about 8 or 9000 miles to now. Those miles were behind my 383 stroker with modified SLP runners and big mouth base - no slouch either.

This is what I experienced tonight. The car is making sick power. Really great and I'm happy about it. But now if I give it full throttle the car tachs up to 4600 or 4800 rpms and the car barely moves forward. I experienced it in both 2nd and 3rd gear. Doesn't matter if it's a standing start or rolling. If I'm going 30 mph (for example) and hit the throttle to the floor, it just tachs up and doesn't go. However, if I lightly roll in to the throttle, it pulls like a freight train with no slippage.

I tried to make a couple videos but with my cell phone camera and at night it's crappy quality. The video has a hard time keeping up with the digital dash changing.

This is the first video. I am in third gear. I start out at 30 mph and 2100 rpms. I hit the throttle hard. The tach quickly moves up to 4700 rpms and I barely move forward before I let up, hitting about 36-37 mph. I make a second pull from 35 mph and zero throttle (about 1400 rpms) to full throttle instantly. I tach up to about 4700 rpms again without moving forward, maybe 37 mph. I then do a third pull with moderate throttle. I move up to 4500 rpms and hit about 68 mph with no issues.



This is the second video. I am in second gear. I am starting around 25 mph and hit the throttle hard to the floor. The motor tachs up from about 1700 rpms to 4600 rpms almost instantly and the car only slowly moves forward, increasing in speed about 10 mph. I have to cut the gas quickly since I don't want to hurt anything. This all happens by the :05-:06 second mark. Like I said, it's fast so you might need to watch it a few times, and try to pause it around the :05 second mark. In contrast that is followed by me moderately depressing the pedal and getting a good pull with no slippage or spikes in the rpms and hitting 52 mph at 3700 rpm in short time:




When the motor tachs up, it's less than a second total start to finish because I don't want to leave it hanging there like that at high rpms and not going forward.

I plan on checking the fluid tomorrow to see if it is burnt, etc. I might stop by the trans shop of the guy who built it and see what he thinks. I might add some lucas oil and drive it until it dies...lol. I don't know the actual problem yet. I have read it could be clutches, torque converter, valve body....well those are all miles apart from each other. I'm no trans expert and I don't claim to be one. So give me your thoughts.