Hi guys. Just joined here. When looking to do an oil change on my transmission, I just found out that my 1968 Jeep J-3500 pickup that has a 1969 Buick 430 in it also has what I assume is a 1966 TH400. I'm trying to nail down just what this transmission might have come from. The data plate was sanded clean at some point in its life. All that is left are stampings. The date code is "336" with the others being "BU-66-24313". This transmission also has a P/N 8623569 valve body (used on both Buick's and Jeep TH400's)
I was not able to find any info on Jeep TH400 Trans codes. Since this is mounted to a Buick engine, with a BOP case, I figured might as well start with the Buick codes. Could the BU coded trans have been installed on both Jeeps and Buick's? Or do I most likely have some sort of Frankenstein trans that is adapted to mount the Dana 20 transfer case on on end and a big block on the other with a Jeep valve body in between? So far the Jeep forums have come back with nothing.
I was not able to find any info on Jeep TH400 Trans codes. Since this is mounted to a Buick engine, with a BOP case, I figured might as well start with the Buick codes. Could the BU coded trans have been installed on both Jeeps and Buick's? Or do I most likely have some sort of Frankenstein trans that is adapted to mount the Dana 20 transfer case on on end and a big block on the other with a Jeep valve body in between? So far the Jeep forums have come back with nothing.