they are not maintenance adjustable on the th400
The th400 is a much stronger transmission meant for heavy duty use while the th350 is meant for normal use.
no
1 and a half to 2 qts
as long as it is a chevy bolt pattern th400
12 to 14
Powerglide, Th350, Th400, or a muncie 4 speed.
9 qrts after overhaul and with new torque converter or 5 qrts when you do trans service only
Should be no pressure, the ATF is just pumped through the cooler back to the transmission.
YES. You may have to change the yoke on the driveshaft. You didn't say what size transmission that is in it now.
no , look for a 200r4 trans which has overdrive and the same lenghth as the th350Wow...completely wrong answer. The 200-4R is the same length as the TH400. Not the TH350. The 700-R4 is the same length as the TH350. And yes....a B.O.P. TH400 will fit that 403 just fine. You'll have to locate a transmission cross member for the TH400 if it was originally a TH350.
TH400 or 4L80E if you want overdrive.