I have a 62/63 first generation T-10 in my í57. I have had this transmission for three years (3000 miles) and never had a problem, until recently. I am using non synthetic 89/90 GL5 gear lube.
I am now having a fluid leak at the input shaft. The transmission was taken out , the front retainer and bearing removed but I canít find nothing obviously wrong at the input shaft, there are no front seals on these transmissions. It was carefully reassembled using sealer behind the bearing retainer. I reinstalled the transmission but Iím still having a smaller leak at the same location. I spoke to the vendor who sold me the transmission and he suggested I use 90/140W oil and a bearing with a built in shield??
Has anyone ever had similar problem with a T-10?
Yep, put sealant on the bolts for the front bearing retainer (oh ya, make sure the threads in the case are clean and dry first).
As far as I know, there is not such a thing as a front bearing with a seal for hese trannys (that 5th hole at the bottom is for oil drain back into the case).
If your alum T-10 has a snap ring to retain the front bearing on the input shaft, it's a 62-earlier. If it has a LEFT HAND THREADED gland nut, then it's a 63-later T-10.
This has gotten this old plant engineer thinking. Dangerous I know.
I would expect an open ball bearing to let gear oil migrate out the end.
Why not sub in a bearing with a snap ring and shield or seal? Unless it is a non standard size, most 100, 200, 300 and 400 series bearings are available off the shelf with a combination of seals, shields and snap ring.
What size (O.D., I.D., Width) is the bearing? Do you have a mfgr's number?
If the drain channel cast into the back side of the front bearing retainer is blocked, and/or the drainback hole in the front of the case it feeds is blocked, you'll eventually wind up with gear lube in the clutch.
Photos are a Muncie, but T-10's are the same design.