Conversation Between Mark Kovalsky and wildonhar

Check the polished end of the torque converter where the seal rides. If it has ANY damage the new seal will leak, too. Also check the bushing that the converter rides on. If it's worn, replace it. They are really inexpensive.

There is a better seal available. It's made from a material called Viton.

Mark

Hi Mark-

read alot of your posts, new to this board, on a few others & lurk here:

1997 4WD F350 PS run hard acceleration in reverse with a big load & heard a bit of a rattle noise after let off the pedal that lasted for about 5 seconds. drove normal after but hour later hauling load up hills 15 miles later, temps went up fast to 240 and lost power at the transmission, dumping fluid from cover. shut it down, towed it home, drove off the truck, behaved like no fluid. dropped the trans, think front seal is leaking, fluid not burnt and fairly red, last change was at around 40k with temps 190 average & 220 occasional. ~100+hp over stock in mods. Plan to replace the seal and put it back on the truck. Any checks I should do while it is off? inspect the internals? TC looks good with no loose parts or other metal pieces in the case. Transmission was shifting great with no issue before and even up to power loss. previous owner claimed to have replaced/rebuilt transmission about 70k ago.