Transmission on H

Fri Mar 21, 2008 8:34 am

Well the Demo is getting ready for the paint booth this week and i thought I would get a head start on the next project. My 43 H is in great shape and needs some tweeking on the sheet metal before I can sandblast but. The transmission works great in 1 2 and 3 gears and reverrse. When put in 4 gear it goes good also until you pull a slight grade and it jumps out. 5 gear is a no no, its grinds to beat the band when you try to put her in there. I am sure its nothing that cant be fixed but havent really been that far in an H before. What should I look for. I am sure I will find a few teeth gone or worn to no end. Are there any tips or tricks to the ol girl. Any in fo is of course appreciated fellas :D :D

Fri Mar 21, 2008 9:09 am

I am thinking that since both 4th gear and 5th gear are effected, there may be a problem with the shift rail, but you will never know until you pull the cover and have a look inside. Usually, when it jumps out of gear under a load, the gears are worn out.

Fri Mar 21, 2008 10:40 am

Shift rail/fork certainly needs to be checked. However, there is another place to expect trouble. The H transmission works like the traditional automotive unit, in that high gear is a direct drive. The input shaft couples directly to the output shaft (like a Cub PTO). There is a carrier bearing between the input and output shafts, It is a likely problem if the transmission won't stay in fifth. Fourth gear is the reduction gear closest to the bearing, so it may be causing the problem in fourth as well.

Fri Mar 21, 2008 11:01 am

:Dito: to what has been said, plus the tranny deck is very heavy, you will need a hoist to lift it.