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#1 |
Registered User
Join Date: Dec 2010
Location: Peterborough, Ontario
Posts: 54
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Rear end woes/questions
http://67-72chevytrucks.com/vboard/s...d.php?t=474536
A while back I damaged my rear end, theres pics & details in that thread.. What I've learned since is that there was half of a gear floating around in my rear diff from the last time it was worked on (the previous owner) so it was just a matter of time before it broke some other things, maybe it was on the magnet all along & finally came loose, who knows.. I don't know how someone could make such a dumb mistake, but its done now. I'm going to rebuild my rear end with new parts since I wasn't able to track down parts to do an easy swap. I was looking in LMC (just to see what all I need) & looking at axle shafts its saying that any 10 bolt with 8.5" ring gear will have 28 spline axle shafts, but when I took my axle shafts out, they were 30 spline. I'm really unsure as to what that means, & I want to make sure I order all the right parts.. I'm not going to replace the axle shafts, but I want to be sure when I get my side gears that they will be 30 spline. Can anybody provide me with some insight here? |
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#2 |
Registered User
Join Date: Jul 2007
Location: Ontario Canada
Posts: 1,006
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Re: Rear end woes/questions
In 1988 they changed the 10 bolts to 30 spline so maybe they threw a few in for 87 ???? or maybe somewhere along the line somebody has put a newer carrier in your older 10 bolt . I would take the number off the carrier and do a search
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#3 | |
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Rear end woes/questions
The best advice I can give you is to re-read the original thread, especially the parts were the guys say not to try it yourself. It will end up costing you more in the long run. This is just not a job for a first timer. It takes some very specialized tools and a lot of patience. It is just not worth the effort for something that most guys only ever need to do once.
Pay the man, and get a warranty, and use synthetic lube.
__________________
You can review the site's rules here. Quote:
Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. ![]() |
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#4 | |
Registered User
Join Date: Dec 2010
Location: Peterborough, Ontario
Posts: 54
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Re: Rear end woes/questions
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#5 | |
Still plays with trucks
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
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Re: Rear end woes/questions
Quote:
My local yard has two sets right now with 3.73 gears on a posi carrier for $150. You should be able to find some locally for about the same. You could also just go to a pull it yourself wrecking yard and grab the whole rear end out of an 88-up truck for under $100 and put the square body spring perches from your rear end onto it. They are just a little wider than the square body rear end and push the rear wheels outward a little to even out the inset rear wheels the square body trucks have. This way the front & rear wheels have closer to the same track width & wheel well location. You will probably not find a low mileage 88-up rear end in a pull it yourself wrecking yard so it will probably need new bearings at the least. With the kind of damage you have the bearings are all compromised and need replaced any way so rebuilding your rear end or getting a newer one to rebuild will cost about the same money once you buy the repair parts yours needs. Setting your pinion depth to get the right wear pattern, setting pinion bearing preload and setting ring gear backlash are not things to be taken lightly. Just the slightest error can ruin parts in a hurry and cost you way more than what a rear end shop will charge you to set up the gears properly the first time. If your friend hasn't specifically rebuilt GM rear axles before you are better off spending the money to have a shop do the setup for you. If you bring them the rear end and parts in hand most shops will only charge you $100 to $150 to install the bearings and set the gears up properly. Well worth the money.
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miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars |
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#6 | |
Registered User
Join Date: Dec 2010
Location: Peterborough, Ontario
Posts: 54
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Re: Rear end woes/questions
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#7 | |
Still plays with trucks
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
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Re: Rear end woes/questions
Quote:
How far north of the border are you? What is the nearest US town to you?
__________________
miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars |
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#8 |
Registered User
Join Date: Dec 2010
Location: Peterborough, Ontario
Posts: 54
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Re: Rear end woes/questions
I found a shop thats going to rebuild it for a decent price.. Now all I have to decide is whether to stay with the open diff, or get a posi unit for a little extra.. Any insight?
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#9 | ||||
just can't cover up my redneck
Join Date: May 2004
Location: Columbus OH
Posts: 11,414
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Re: Rear end woes/questions
Quote:
Quote:
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__________________
You can review the site's rules here. Quote:
Bad planning on your part does not necessarily constitute an instant emergency on my part.... The great thing about being a pessimist is that you are either pleasantly surprised or right. ![]() |
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#10 | |
Still plays with trucks
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
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Re: Rear end woes/questions
Quote:
It is worth the money to do it now while it is apart and being rebuilt.
__________________
miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars |
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#11 |
Registered User
Join Date: Mar 2000
Location: Blue Ridge, Tx
Posts: 1,172
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Re: Rear end woes/questions
If you're unemployed, I think I would find the least expensive route so you can have a vehicle to drive. Having a posi would be the last thing on my mind.
Posted via Mobile Device
__________________
Fawker Fab three seater rock crawler buggy 498 BBC/SM465/203/205 doubler, propane, 5.13's, 42" PB Rockers '66 C10 - The new hot rod '77 3+3 Dually - 12 valve 4wd conversion tow rig project '28 Ford 2 door sedan street rod RevLimit Offroad "Hang on beer, we can do this." |
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#12 |
Registered User
Join Date: Dec 2010
Location: Peterborough, Ontario
Posts: 54
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Re: Rear end woes/questions
Lol understandable.. I have the money though which I wasn't thinking I would, & thats why I hoping to fix everything myself. I still have a side income & I got bonuses from the last 2 years when I left my job. Tuesday I'm going to go in & discuss what exactly to put in there.
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#13 |
Registered User
Join Date: Dec 2010
Location: Peterborough, Ontario
Posts: 54
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Re: Rear end woes/questions
Came to my senses, my trucks in the shop now! Its getting a new auburn posi, new 3.42 ring & pinion gears & all new bearings & seals. Should be ready tuesday or wednesday
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#14 |
Still plays with trucks
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,556
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Re: Rear end woes/questions
Good to hear it is getting done right. Hope everything goes well.
__________________
miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars |
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