Ok, I got the transmission out of my truck a few weeks ago and brought it to some guy. Basically its ****ed and it will cost $2000 to fix. I only paid $1500 for the truck like 4 years ago, so thats not happening. Its a 1990 Isuzu 4WD Truck with the 2.6L 4 cyl. I am pretty sure the transmission from a Rodeo or a Honda passport will fit, but not 100%. All I have been able to find so far (in 5 minutes ) is this. I sent him a message asking how many miles are on it and if he can ship it w/o the transfer case, because mine is still fine.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=280110524827
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=280110524827