1962 10 bolt pinion seal replacement help
 

so my pinion seal i assume is leaking...
cleaned off rear end an seems to have gear oil coming from the front yoke area.
Never done this fix... seen a few vids but nothing directly on the older 10 bolts..
any how tos? on how this is done.

Re: 1962 10 bolt pinion seal replacement help
 

Won't make a difference but you have a 12 bolt, possibly an Eaton. Need to remove the pinion to get to the seal....

Re: 1962 10 bolt pinion seal replacement help
 

Just did my 63 Impala last week, I pulled my rear end up on ramps you need to lock the wheels when taking pinion off.Remove drive shaft and mark the pinion nut and housing do this to line the nut up in the same place it was at before you removed it. Peel the old seal out and replace,I smear a little silicone on the seal outer edge that contacts the rear end housing so it wont weep out. Replace pinion nut and tighten back to where your marks line up plus a tad more ,this will insure that the crush sleeve wont skate. The pinion nut is a rel PITA to take off and on I used a bottle jack on the end of my 1/2" breaker bar to aid in this

Re: 1962 10 bolt pinion seal replacement help
 

I need to do this job on my 62 rear end...its leaking like a big dog and I'm getting tired of topping it off and keeping a drip pan under it in my shop.

I've read a lot of horror stories about getting that pinion nut off. Hopefully that bottle jack idea will work....good idea.

Re: 1962 10 bolt pinion seal replacement help
 

I use a big ratchet when I can but if you are really careful you can use an impact gun. Get a measurement on how far down the nut is on the pinion threads and make the scribe mark mentioned earlier. This will ensure that you can put it back where it started in the event that the socket spins faster than you can count. That's two reference points. The back of a dial caliper works good for this but alot of times you need to put a flat edge on the pinion to get an accurate measurement. Most pinion nuts are beveled and you need to find a repeatable surface.

The worst one i ever did was on a 62 one ton HO72. We put a 3/4 breaker bar on it hooked to a tractor. Pulled the truck sideways and broke the breaker bar. It took a borrowed 1" impact and a 60 gallon compressor to finally get that one loose. Normally they are nowhere near this bad.

Re: 1962 10 bolt pinion seal replacement help
 

Thanks guys...
Yea just nervous about getting the pinion nut back correctly.
Dont wanna damage my rear end from a 15.00 seal replacement.
Also ...
Previous mention..
My cover is 10 bolts..
So it's a 12 bolt rear?
I know I read something about the cover bolt pattern doesn't determine the rear end type...its the bolts on the gear.

Re: 1962 10 bolt pinion seal replacement help
 

I'm with you...I count ten as well?

http://67-72chevytrucks.com/vboard/s...d.php?t=630751

Anyway...you go first and give a full report on how it goes, maybe that'll give me the courage to go ahead and attempt mine!

Re: 1962 10 bolt pinion seal replacement help
 

Just measure it carefully before messing with it. Its a really easy day once the pinion nut starts to loosen up. 60 years of grime and rust can make it a challenge but totally feasible. Axles are one of those things that make you nervous the first time but when you finish you ask yourself why you were so worried to start with. It took me 20 years before I decided to do a gear setup and now I kick myself because I could have made a ton of cash doing them on the side. There may be an art to it but we can all draw stick figures!

Re: 1962 10 bolt pinion seal replacement help
 

If theres 10 bolts then a 10 bolt it is and 12 for 12,the nut will break loose squirt some pb blaster on it . I just mark mine and take it off some how it allways lines right back where I marked it,measurements are good thing :metal:

Re: 1962 10 bolt pinion seal replacement help
 

Right on...
Gotta get it rolling..
Will be free to socialize soon

Re: 1962 10 bolt pinion seal replacement help
 

Eaton HO rear ends have 10 bolts holding on the back cover. They are nothing like the 10-bolts you guys are thinking of. Post up a pic of your diff.

Gary

Re: 1962 10 bolt pinion seal replacement help
 

A '62 1/2 ton will have the Eaton HO32/33 which has a removable rear cover as well as a drop out 3rd member, both with 10 bolts attaching them to the housing. The truck 12 bolt came out in the '63 model year.

Re: 1962 10 bolt pinion seal replacement help
 

Ill get a Picture in next day or so.. But it has 10 bolts on cover forsure.
According to AP store... it shows a spicer 8.5 listing

Re: 1962 10 bolt pinion seal replacement help
 

Have you swapped out your seal yet?

I havent done my 62 yet...got a quote from a local old school hot rod shop of $175 for them to swap my seal out.

I've never paid a shop to do anything on any of my rigs ever, so I'm having a difficult time pulling the trigger, just outta pride mainly, lol.

Re: 1962 10 bolt pinion seal replacement help
 

If there is a bolt on cover on the back and the gears bolt into the housing from the front then its an eaton axle. If you can't visualize this just Google Ford 9" third member. A GM 10 or 12 bolt will only have the rear inspection cover. Super easy to tell apart.

Re: 1962 10 bolt pinion seal replacement help
 

just go for it. Odds are it won't be to bad. If you can't budge the pinion nut just take it to the shop at that point. I know all about pride. I have never turned a vehicle over for repair other than alignments and machine work. In my entire life I only saw my dad take 2 things to a shop. One was a frozen front u joint in an axle that had to be torched out and the other was a hydraulic cylinder that bent into a "J" that also had to be torched apart to be rebuilt.

Re: 1962 10 bolt pinion seal replacement help
 

No haven't yet...
But in the plans so I can get it on the road

Re: 1962 10 bolt pinion seal replacement help
 

Heres my rear end picture...
It's all stock.
I'll be attempting the seal replacement soon. So I can get it cruisin

Re: 1962 10 bolt pinion seal replacement help
 

Yep... that is an Eaton HO rear end. Not the standard GM "10-bolt". Wouldn't be the first time an Eaton was mistaken for a 10-bolt. :)

Gary

Re: 1962 10 bolt pinion seal replacement help
 

Ok...
So is this a good thing ..lol
Also do you know what gear it has possibly.
An does this rear differential change how the pinion seal is changed?

Re: 1962 10 bolt pinion seal replacement help
 

After all those replies,no one has mentioned that the pinion nut could be loosening by itself,or the pinion bearings are failing,both of which cause radial play at the yoke,which in 40 years of doing rears,happens to be the #1 cause of seal leakage.If you can move the pinion yoke up & down even a little,a new seal alone is not going to fix your issue.If you have ZERO movement up & down at the yoke,then what the other guys have suggested will serve you just fine

Re: 1962 10 bolt pinion seal replacement help
 

I remember a back wheel coming off ours and passing us in the 51 Chev one ton turnip truck. That must have been more than fifty years ago. Good thing it was on the return trip.

Re: 1962 10 bolt pinion seal replacement help
 

It more than likely has 3.90 gears. The only other option is 3.36 gears which are a bit rare.

Re: 1962 10 bolt pinion seal replacement help
 

I am a bit concerned about that very thing with my 62...radial movement from wear and tear and time.

If its apparent, it may indeed be time to swap to a 12 bolt...hope not though.

Re: 1962 10 bolt pinion seal replacement help
 

No movement up/down or side to side as ive noticed...
maybe possible once drive shaft is disconnected..
but as of now seems good.