Every part that is in the 400 is heaver and bigger then the 350.
The 350 turbo is light duty, but can be modified to make it tuff.
The 400 is already tough from the factory.
None, TH stands for turbo-hydromatic, hence th350 or 350 turbo.
The length of the output shaft
There is no difference, they both refer to the Nissan 350z.
The 400 turbo pan is squire and the 350 turbo pan has 3 squire corners with 1 corner cut in a angle
the 400 turbo is made for more pulling that's whats in my 85 gmc 2500 its just a heavy very expensive transmission.
Look at the pan, the Turbo 400 pan is 16 5/8-inches long and 13 inches wide - it looks like a map of the state of Texas . - The Turbo 350 pan is like a square with a corner cut off and is 13 1/2 inches long and 13 wide. Read more: How to Identify a Turbo 350 or Turbo 400 Transmission | eHow.com http://www.ehow.com/how_7423514_identify-350-turbo-400-transmission.html#ixzz2DV3H19xj
turbo 350 or 700r4 turbo 350 or 700r4
A turbo 350 has only 3 gears. The 700R4 has 3 gears plus over drive and lock-up converter. And it is the same as a 400 turbo with overdrive.
yes a 350 turbo converter will fit a 400 turbo and vice versa
No turbo 350's in 1992.
About 6 inches
No it will NOT interchange. The 350 and 400 turbo are actually VERY different transmissions.