Originally Posted by FPNC
Captsteve53's dimensions are correct.
The fluid return over the top of the planetary gear "bucket" means this is a 2.10:1 ratio gear. Be aware that unlike other 71c /72c gears, the pump
on the 2.10:1 units cannot be re-indexed to change input rotation.
I have the 71c with the Perkins
4-108 and it does have a plate on it saying 2.1 to one ratio. The plate is hard to read and maybe it's not 2.10 but something a little different. I do not have a metal fluid return over the top as his photo
shows. The dip stick looks the same and is in the same location and that is how I change the fluid. Can not locate a drain plug
and I merely use a hand pump with a tube to suck the fluid out and then add just the same amount as removed not knowing how high up the fluid is suppose to be on that dipstick. I do have an oil
cooler on the Perkins
and just assumed that it was for the engine oil
rather that the tranny fluid, but now not sure.