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Old 08-12-2019, 11:55 AM   #1
C30Seenemall
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Rear end help

Hey Guys (and Gals)!
I am looking to rebuild (stock) the rear-end of my '75 Scottsdale.

It's a one-ton, eight-lug Camper Special with a 454, automatic.
Any help, guidance, and direction is massively appreciated!

I have work experience with Chevy vehicles, so I understand most procedures.
However, I'm 67, (), so would I benefit from a professional doing this instead?

Thanks!
Wayne
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Old 08-12-2019, 12:34 PM   #2
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Re: Rear end help

1st..need to determine which axle you have ...2nd..if you've never rebuilt a axle it can be a hair pulling experience to get the setup right...a pro is a good choice...what is exactly wrong with the rear?...you may be money ahead to try and find a replacement axle...you can sink a bundle in a rebuild if you start replacing everything
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Old 08-12-2019, 01:19 PM   #3
C30Seenemall
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Re: Rear end help

Quote:
Originally Posted by mongocanfly View Post
1st..need to determine which axle you have ...2nd..if you've never rebuilt a axle it can be a hair pulling experience to get the setup right...a pro is a good choice...what is exactly wrong with the rear?...you may be money ahead to try and find a replacement axle...you can sink a bundle in a rebuild if you start replacing everything
Thanks!
Here is a photo of the rear end.
It has 14 bolts on the cover.
One mech said the seals are bad. Fact is, the truck is 44 years old, so I'm thinking it wouldn't hurt to rebuild.
There is some grease being thrown out the front of the rear end. Note marks of left shock and exhaust pipes.
I was also told it would be $700-800 to do (to repair seals).
I see no axle grease running down the tires so I think those bearings are still okay. I know this rear has another set of seals inside near the third member.
Thanks for your input!
Wayne
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Last edited by C30Seenemall; 08-12-2019 at 01:34 PM. Reason: Missed making additional comment.
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Old 08-12-2019, 02:36 PM   #4
sweetk30
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Re: Rear end help

just about anything you would need to know on that axle style is here . http://www.pirate4x4.com/tech/billav...ble/index.html

there stupid easy for a first time axle fresh up or rebuild .
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Old 08-12-2019, 03:14 PM   #5
truckdude239
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Re: Rear end help

if its not making noise i believe i would just change the seals and axle bearings and call it a day...
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Old 08-12-2019, 05:09 PM   #6
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Re: Rear end help

I agree with Truckdude.....and it is not a 7-$800.00 job
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Old 08-12-2019, 05:40 PM   #7
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Re: Rear end help

Yep..just. change the seals ...but check your pinion for slop....
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Old 08-12-2019, 06:11 PM   #8
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Re: Rear end help

I have no idea if I accidentally sent a partial reply.

Anyway, thanks for all the good, useful info!

I'm assuming I can do all this without removing the entire rear axle housing.
I figure the axles have C clips? and what about the pinion seal (I think that's shot)
...and might as well replace all bearings?
That's two bearings per axle + seals, and a pinion bearing & seal?

I've got a 1975 CD C10-20-30 manual, do you think I can put seals and bearings in using that, without a major deal?

(For all the wise guys: I know, I'll need wrenches, screwdriver, and other hand tools)
Thanks again for all the helpful info!
Wayne
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Old 08-12-2019, 06:39 PM   #9
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Re: Rear end help

You should have a full floater...no c clips...the axles bolt to the outer hub..don't even have to pull the tires off...remove the bolts and the axles will slide out...but if you dont have anything leaking around the rear tires I wouldnt mess with those...it looks like all you need is a pinion seal from your pic...mark the yoke nut and the yoke with something that wont wipe off...remove the nut counting the turns..remove the yoke..pop the seal out put new seal back in reinstall the yoke and nut. Counting the turns back on...the pinion bearing are preloaded with the pinion nut ...
But before you do anything check the pinion shaft for play...if theres play itll have to be rebuilt..
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Old 08-12-2019, 07:19 PM   #10
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Re: Rear end help

the rear is a full floater as said no c-clips .

the bearings are oil bath from the gear oil . unless they look bad leave them alone . there NOT grease packed . when its all back together tip / jack up 1 side for a few min to let oil go in the hub from the diff . do the same for the other side for a few min . check oil level and top off as needed 80-90 w oil . road test and let cool and recheck oil again to be sure .

the wheel seals = pulling the hub & drum as one unit to get to the seal . if the spindle surface of the axle is groved then dont bother with speedi-sleave repair kit . just use the newer seals like this # from skf 28635 its for like a 02 or 03 2500 or 3500 with the newer version of this axle . its seal on a seal so no more seal spinning on axle with worn surface . and its cheeper than the repair sleaves .

the pinion seal is not bad but the yoke is pressed on the pinion splines so its not just a pull off by hand thing to change . the crush sleave is in there and there supost to be used 1 time but if you know how it works you can re use it . or swap to a solid spacer kit but they take a bit to step up . but there nice after that .

if any question just ask we can help you out .
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85-c10sb summer fun toy .
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EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
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Old 08-13-2019, 10:02 AM   #11
C30Seenemall
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Re: Rear end help

If I'm only replacing the pinion seal, how do I pull the yoke off?
Gear puller? What type? I have several types.

Or is it a press off and press on?

I assume a press on and off means I have to pull the axles enough to release the gear unit. Then pull the unit out and have it pressed off?

I want to thank all you guys who have shared the information to educate me!
Wayne
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Old 08-13-2019, 11:04 AM   #12
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Re: Rear end help

a 2 jaw puller will do it if theres something for it to grab
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Old 08-13-2019, 03:58 PM   #13
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Re: Rear end help

pop off with gear puller . and block of wood and 4 lb mini sludge hammer install .

its a full floater = no pull axles for this kind of job .

next question please
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77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
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Old 08-28-2019, 02:42 AM   #14
71cheyennesuperlongb
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Can someone tell me if you can put a positrac unit in a open carrier?

Can someone tell me if you can put a posi unit in a open carrier? Sorry for hijack but old fart cant remember how to start my own.
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Last edited by 71cheyennesuperlongb; 08-28-2019 at 02:51 AM.
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Old 08-28-2019, 10:56 AM   #15
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Re: Rear end help

not a factory posi .

it would be a lunchbox locker unit like a powertrax / lock-right/along these lines yes .

remove spider gears and washers and install this unit and its a locker but works good around corners if your not on the power to hard .

otherwise its a whole carrier swap over .
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77-k30lb BIG truck build .
87-k30lb budget beater build .
85-k30lb the plow machine build .
85-c10sb summer fun toy .
-----------------------------
HOLLEY SNIPER efi = worst case of p.i.t.a i ever had .

EDELBROCK pro flo 4 = best deal going so far . love my setup works great.
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Old 08-28-2019, 01:43 PM   #16
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Re: Rear end help

And to start a new thread just click the ( new thread ) button at the top left side
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