LUVboat74 wrote:
Hello I have a 1979 LUV with the standard g180 motor with a weber carb, which I may swap for a g200 with weber carb, and standard 4spd 4x4 transmission and was looking into a 5spd upgrade from an isuzu. From what I understand the 1984-1987 isuzu pups and troopers had either 5 tooth (MSG-5ET-A) or 6 tooth (MSG-5ET-C) 5spd transmission for 4x4. What all would I need to do in order to use one of these transmissions. I do not know the specifications of the standard transmission and I do not know for sure how many splines these transmissions have i think 26 or 27? Any help is appreciated!
The only thing I know of with 5 or 6 teeth is the speedometer drive gear. That might explain why I've seen some MSG transmissions with 5-tooth and some with 6-tooth speedometer gears. The 4x4 output shaft has 27 splines, and will fit a 4x4 LUV slip yoke. Some people say 26 splines, but the yoke has 26--one of the notches is double-wide and accommodates two splines. I've read that the 5-speed is a little longer than the 4x4 4-speed, so I'm pretty sure the rear transmission mount would have to be moved aft, and the driveshaft would have to be shortened.
The MSG 5-speed 4x4 was really rare. I think it was only offered in '86 & '87.
Jack
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'83 Isuzu P'up Diesel LS - Original Owner
JoeIsuzu@IsuzuPup.comIsuzuPup.com