I am in pursuit of a new transmission (and torque converter) for my street / strip car. Due to… rough driving, I believe I have damaged the clutch bands inside my 700R4 (with a 2000 stall converter). Under partial throttle, I feel the trans slipping and the engine rpm jumps a couple hundred when this occurs. Thus far full throttle doesn’t seem to be affected. Please bear in mind that I don’t know a lot about transmissions.

As currently set-up, I achieved rwtq of 341 ft-lbs at ~3800 rpm and rwhp of 275 at 4500 through 4800 rpm. (with damaged transmission)

I measured about 80% of my total torque around 2600 rpm. Should I move my stall up to 2400-2600 for a street driving car; or is that to much?

Can you guys give me any recommendations for transmissions and converters?
I’m looking at a Hughes trans and a Vigilante (lock-up stall) converter.

Specs:
Engine: 383 w/ 10.5:1 ratio
Heads: Trick Flow 23° ported heads (195)
Cam: Comp Cam XR276HR, duration advertised in 276 ex 281 @ 0.050” in 224 ex 230, lift in 0.503 ex 0.510, lobe 112°
Intake: LTR (tpi speed density) with ported plenum, AS&M runners and ported Accel base manifold
Ford 30# injectors
Exhaust: SLP 1-5/8 headers and 3-inch back
Rear: 3.23 posi from 2002 SS

Thanks everyone for your help.

Really... no thoughts at all? Am I at least on the right track in terms of a reliable vender and stall speed? I do appreciate any and all help.

Thanks

here at our shop, jus about any car with a decent cam will take about 2800-3000 stall and its still really drivable on a street. i currently have a 383 11.8:1 with slightly larger cam and keeping my 3000 stall convertor. also have to remember as an examply a 2500 stall rated may pull 3200 simply because different power/torgue curves. transmission specialities is what we sell and when given the application, they are always within 50-100 rpm of rated stall. send me a pm and i can give you prices for our street strip transmission/convertor packages if you like. we have some 700's behind 650-750 hp motors. we are currently building a car that has a 383 dart 230cc 8.5:1 with a 8.71 supercharger with the 700 turbo.

So your thougths are that I am more than okay with a 2400 stall on a street car and I can even go higher with my set-up with reasonable drivability? What size converter would you recommend? (9"?)

2400 stall may work better with larger cubic inch and work with the torque of your motor. itd be a good trial and error thing. convertors are easily changed. i'd still think a little higher stall would be better. get the best of all worlds around 2800-3000 jus from experience. I'd stick with a street strip 10"