all the th400 guys come in!!!
I went M6 to TH400...now I am 4L80e....either way i'll never go back to a manual turbo set-up...the auto is better all of the way around.
I also couldn't agree with KP more...I bought a cheap converter (9.5") stalled for 3300....well it would flash to 5500, between shifts it may drop 50-100 rpms and my 60's were horrible..mostly 1.78's off the t-brake on et streets! The car sounded like a M6 with a slipping clutch.
I would just do what most are saying here, call the conv company and tell them everything, they will get you straight. I learned my lesson, don't skimp on the converter, I'm going Yank this time around.
I also couldn't agree with KP more...I bought a cheap converter (9.5") stalled for 3300....well it would flash to 5500, between shifts it may drop 50-100 rpms and my 60's were horrible..mostly 1.78's off the t-brake on et streets! The car sounded like a M6 with a slipping clutch.
I would just do what most are saying here, call the conv company and tell them everything, they will get you straight. I learned my lesson, don't skimp on the converter, I'm going Yank this time around.
i am doing what one guy suggested, i have no idea really what hp i am going to be making so i bought a used 3200 tci converter just to get it going so i can geta weight and hp rating and give to a good company and get one built for EXACT setup
are you still runnin that 3300 stall?
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Joined: Jul 2005
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how many of you guys that went to TH400 and say you shoudl have done it a long time ago, and that its the best thing you did, say that because of 1/4 mile???
what about the rest of the performance of the car, driving aroudn normally I think it would be very nice, but what about top end?
what about the rest of the performance of the car, driving aroudn normally I think it would be very nice, but what about top end?
I did it because I wanted to see the true potential of this car at the track and I was tired of screwing around with $1400 clutches and worrying about when the tranny/clutch would break next. If I was into top speed runs, etc I probably would have stayed with a 6 spd manual because a TH400 is not all about high speed runs IMO. My freeway flyer days are over with and I just want a nice reliable setup that I don't have to worry about and that can turn a number. Plus it just feels stupid leaving a stop light and just clicking the next gear riding out with a few pounds of boost almost effortlessly. 
Last edited by NicD; Apr 28, 2008 at 10:37 AM.
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how many of you guys that went to TH400 and say you shoudl have done it a long time ago, and that its the best thing you did, say that because of 1/4 mile???
what about the rest of the performance of the car, driving aroudn normally I think it would be very nice, but what about top end?
what about the rest of the performance of the car, driving aroudn normally I think it would be very nice, but what about top end?
I personally find my car much more fun to drive with the th400 than it ever was with the t56. I no longer feel like I have to work myself or the car hard to get it to perform well. Even when I take it to the track and make a shitty pass it's still a high 10 sec pass.
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Joined: Jul 2005
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I'm glad I did it (TH350 in my case) because I got tired of fixing 4L60E's. I've been running mine for 6 years with no issues at around 900 hp. About 2 years ago, I brought it to a transmission shop to have it freshened up. They looked inside and said it was like new.
Mike
I went from A4 to A3, but I know some M6 guys that have had to fight clutch problems and they never get any good track passes because of it. It would be cool to have a freeway flyer but where I live it's hard to go faster than 140mph for more than a 1/2 mile.
well I am talking highway in the middle of no where where you can go 180 plus. I know the t400 car is hella fast, but you do run out of gear before we do. I can hit 180 in what seems like a blink of the eye.
Top speed runs yes the M6 has the advantage obviously, but even a typical freeway roll around here from say 60-150 I would still put my money on the TH400 with a bigger power car.
hughes converters are good, neal chance converters too.
Anyone really have to retune their car after a TH400 swap? My car is running lean now that I have a 400. Its only lean in the off idle and cruise range.
Weird. This tune was great for nearly 2 years.
J
Anyone really have to retune their car after a TH400 swap? My car is running lean now that I have a 400. Its only lean in the off idle and cruise range.
Weird. This tune was great for nearly 2 years.
J
I know it is not a 400 but I have a 4L80E, I used to have a 6 speed, and I would like to see a 6 speed with the same or even 200 RWHP more than I have rape me from a roll
it will not happen! 
