140 xmission oil leaking from axle housing-advice?

Can I replace the seal without pulling the transmission out by splitting at the transmission/axle flange? Should I replace other parts in addition? It's a '68 model and all else works well. Any advice appreciated.

Thanks.

I also side with Patricks thoughts, why are you using Hytran, it should have 90W gear oil or heavier. Secondly, if these tractors are being over filled with transmission oil, the excess will leak out. I'd try filling it to proper level with gear oil, maybe even a 1/2 quart over, and see what happens.

It's a lot of work to change those seals and bearings. If you don't have excessive noise and if axles are tight when you jack tractor, I would start with the oil change. I'm guessing I've been called in on 25 different tractors over the years, every case the transmission was over full. Both my Super A and 140 were leaking and over full when I bought them. I changed oil and filled to 1/2 quart over full with gear oil, they don't leak anymore. It's been 4 years on 140, SA, so long I can't remember, but I've never changed a seal or bearing yet.

My operators manual, pg 71, says to use Hy-Tran in the xmission, rear wheel housing, and touch control. Should I ignore this and switch to 90 wt gear oil?

It didn't all leak out. I just looked through the fill plug with a flashlight and could see a level, but it seemed pretty far down. Could you remind me which is the level plug? Manual says on the left side but all the bolts look the same. Is it the lower one furthest to the front? Seem to remember it was the second one up on the fender. Thanks in advance.

It seemed the gears were making too much noise, which is why I looked in the first place through the fill plug and couldn't see a level. Maybe there was a low level. I added 5 qts on top.

I know the newer manuals say hytran for transmission, however nothing changed in there since 1939, other than harder gears. As you know, 140s do not draw hydraulic oil from transmission as later larger tractors do, therefore gear oil is the way to go. Gear oil will make transmission quieter, will lubricate better and cause transmission gears to slow down faster after tractor has been idling in neutral.

Another thing I can tell you, having farmed all those years, before the days of hytran in transmissions, it was rare to see a tractor at the IH dealer shop with transmission or rear end opened up. Yes, the transmission reservoir did improve hydraulic function but I never figured hytran was a great friend of bearings or gears.

This is so true. I could barley get my tranny into first without grinding it a bit till I switched to 90 weight. That sucker was LOUD too!

Now it just slips into gears slick as snot and hums a little. :)

How come you are running Hytran in there anyway? try some 95-140W gear oil. Mine was dripping a bit too and it quit when I put that in it. Also made it run a bit quieter too. I'm sure yours is worn quite a bit too and I think this thicker stuff helps with the clearances.

Do you suggest replacing any bearings?

What are the shims for?

scotty

scotty