th-350 to th-400 - Team Camaro Tech
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post #1 of 9 (permalink) Old Feb 20th, 01, 04:37 PM Thread Starter
 
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I plan on going to a TH400 in my camaro its an 80 do I have to change the drive shaft and/or the crossmember for the tranny to fit.
it currently has a TH350
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post #2 of 9 (permalink) Old Feb 20th, 01, 04:56 PM
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Yes. Is there a reason to go to the 400 they use a bunch more horspower and if you get a 350 that has been built correctly it will work fine.

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post #3 of 9 (permalink) Old Feb 20th, 01, 05:00 PM
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I agree with oger. Why are you changing? The 350 can take alot of abuse, it's lighter and takes less horsepower.
Stephen

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67 RS/SS 350 700R4
69 SS clone unfinished
72 454 Weekend Racer
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post #4 of 9 (permalink) Old Feb 20th, 01, 05:03 PM Thread Starter
 
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this is the second time the tranny has gone out on me and I plan on pushing around 550 horse with a supercharger by next summer if things go the way I want
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post #5 of 9 (permalink) Old Feb 21st, 01, 05:35 AM
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You will need a T-400 driveshaft yolk (It's bigger than the T-350). The transmission mount is farther back on the T-400 so you will need a T-400 crossmember or you can modify your existing one. Your driveshaft will probably have to be shortened as well. The T-400 also uses an electric downshift switch if you plan on hooking it up.
Stephen

------------------
67 RS/SS 350 700R4
69 SS clone unfinished
72 454 Weekend Racer
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post #6 of 9 (permalink) Old Feb 21st, 01, 10:27 PM
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Why not just go with a built 700r4 or 200. You get an overdrive gear with these. You might want to look into a temp gauge for the tranny could be it gets too hot and needs a better cooler.
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post #7 of 9 (permalink) Old Feb 22nd, 01, 02:40 AM Thread Starter
 
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a couple friends of mine went the 700 route and all they did was tear them up. I had thought about it but then again I really dont want to keep blowing another transmission up
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post #8 of 9 (permalink) Old Feb 22nd, 01, 04:52 AM
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You will have to shorten the driveshaft {make sure you get the short tailshaft trans} The 400 is really a strong trans if you change the second gear sprag. You are putting a blower on it so you will have to go to a manual valve body.

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post #9 of 9 (permalink) Old Feb 22nd, 01, 07:08 PM
 
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well i have a 79 camaro and just so happens we done the same thing . yeh u will need a different yoke and also move crossmember farther back we also had to have my drive shaft shortened 3/4 of an inch that was 61 dollars , but about the mount im not real sure because my turbo 400 had a shorter shaft than most turbo 400s and about the horse power loss i would rather run a couple tenths slower than replace a tranny every year cause a turbo 350 cant handle it good luck
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