D8-2u leaking trans

In my experience, usually if a seal is leaking it is caused by a bearing gone bad.

what is serial # earlier 2Us have a one piece shaft that means it needs to be removed from the tractor to change seal, you do not need to touch the finals for this but it is a bit of a project, a service book will give you step by step. midway threw the 2Us they changed the shaft and the flange can be removed to change the seal without taking trans apart

The tractor ser# 199335 I Believe the oil leak is the front input shaft of the trans as most of the oil is coming from the front of the trans. Does anybody know if I can still buy the seals? Not looking forward to doing this job. I remember replacing the clutch and thermoids and it was a big job. The dozer does not have a canopy so its hard to remove those heavy parts. Also I know the bearings are good shape, No slop or noises.

THANKS STEVE

Hi Team,
Service Bulletin (Track Type Tractors) Feb 21 1955, tells us that the two piece upper shaft was fitted standard from 13A 3234 and up and was adaptable to the D8 2U 21513 and up, and earlier 13A 1 and up tractors, also to 2U 5307 and up tractors that have been field fitted with oil clutches.
Cheers,
Eddie B.

Check that s/n again. They only built to 23,527.

After reading all the threads from TIREDDOZER, I'm 99% sure this is my Brother. That being the case the Real Serial # of this D8 is 2U12593

Hi OM,
S/No 2U 21,513 and up is correct as per the article. Yes, right at the end of production and Service Magazine, June 30 1953, announces that oil clutches are fitted standard from S/No 2U 21,513 and up.
Cheers,
Eddie B.

Hi edb,
It's that 199335 s/n that I was questioning, not your service bulletin article.

OK penny drops--did not initially pick up that you were referring to someone else's post 😊
Cheers,
Eddie B.