everybody listed up.
H151 and H150 trannies are long aluminum 80 series and 70 series 1FZ and 1HD-T trannys (and 80's use them with 1HZ diesels as well NOT IN 70 SERIES). Shifter is in main body of tranny. They never were seen in north America, period. Specter has take outs, but there are about 1.5 million other yards around the world to find one. These use their own transfer case.
R series aluminum trannys are R141, R154, R150, R151 etc. Smaller trannies with cousins used in 4 runners, supras, turbo mini trucks, and 70 series with PZ/HZ engines (like mine trucks 1999-2003) and the 4 spd (R141) in mine trucks with PZ engine. Shifter is in back extension. Will accept a std 1983+-1992 transfer case with correct adapter.
a 1991 FJ80 has a 3F-EFI engine (there are carb models elsewhere). A 3F is a 2F is a F for all block to bellhousing applications. F series engines (NOT FZ) take cast iron manual trannies. Therefore, a H55 (which is a cast iron 5 speed) will bolt to a 1991 FJ80 using a 3F (1985+ US) OR a 2F bellhousing (essentially a type 1974-1980 and b type 1981-1985 use the B type). You could even put a 1974 bellhousing, flywheel, and 4sp US tranny behind a 1991 2F.
You cannot put a H150/1 tranny behind a F series engine and a cast iron tranny will not fit behind a 1FZ engine. since a cast iron tranny sits behind a 1HZ (non Turbo but north american spec 6 cylinder diesel) and a 1HZ takes same bellhousing as 12 valve 1HD-T you can put a cast iron behind a 1HD-T (6 cylinder non US turbo diesel engine).
