Identifying a 400 vs a 350
 

well I was told by the original owner that I had a TH400 but after getting Ron Sessions book I don't think I do. Can anyone tell me how to identify what trans I have?

Thanks for any help.

Ken

A turbo 400 has the vac modulator mounted on the pass side front of trans,,,a turbo 350 has it mounted on the rear pass side of trans. Also a turbo 400 oil pan is anything but square/retangle.

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1971 C10 swb stepside 350/700R4/3.73posi
Killingworth, Connecticut

thanks gordo for the quick reply...my pan is definitely square...so that must mean i have a th350...right? i couldn't find any id plates or marking on the case to positively id the trans...are there any?

what's the general opinion of the th350 vs the th400?

Here you go.
http://www.freephoto-i.net/users/longhorn/transpan.gif
The 350 is a good tranny, and onless you are pushing gobs of h/p or torque, you should stick with it. THe 400 is bullitproof, but eats power. Some claim as little as 15 horses, others say as much as 30. Either way, 15 is enough to feel it in the seat.

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'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

th350 is good unless you have a 350+ hp engine unless you super build the th350 for the higher horse use

th350 is very tough, nothing to worry about if you take care of it, its more reliable than stock 700r4 and thm200 and thm2004r and etc etc