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#1 |
Senior Member
![]() Join Date: Jun 2021
Location: West milford nj
Posts: 328
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Rust on ring and pinion
Did I just open eatons pandoras box ? Was planning on just changing seal and gaskets. What you all think ?
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#2 |
Registered User
Join Date: Apr 2005
Location: Cheyenne, WY
Posts: 742
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Re: Rust on ring and pinion
Sadly I would say, new ring and pinion and new bearings.
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#3 |
Registered User
![]() Join Date: Oct 2011
Location: jackson michigan
Posts: 755
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Re: Rust on ring and pinion
Did it make a lot of noise? Doesn't look like it was driven in a long time.
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#4 |
Senior Member
![]() Join Date: Jun 2021
Location: West milford nj
Posts: 328
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Re: Rust on ring and pinion
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#5 |
Registered User
![]() Join Date: Oct 2011
Location: jackson michigan
Posts: 755
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Re: Rust on ring and pinion
I would not be able to not rebuild it. It's going to fail. Now is the time to collect parts and do it. Change the year ratio of you want. Not the best news but do it once and do it right.
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#6 |
Senior Member
![]() Join Date: Jun 2021
Location: West milford nj
Posts: 328
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Re: Rust on ring and pinion
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#7 |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,374
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Re: Rust on ring and pinion
There’s a really good thread somewhere on here. It covers current part numbers and the rebuild process. It was from about a year or two back. I can’t seem to find it now though. I will tell you there are no new gears for this axle, you’ll have to source a used set.
__________________
Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0 ![]() |
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#8 |
Post Whore
![]() Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,114
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Re: Rust on ring and pinion
What are your plans for the truck?
I believe you can get the numbers off of the bearings and source them from a quality bearing house. As far as the gear set goes it depends on your comfort level. If you are unable to source a ring and pinion you could acid wash the rusted areas to clean them and then reinstall them. After all this kind of rusting is common when vehicles are parked for extended periods of time in humid areas. How many times do people start driving vehicles that have been parked long term and never crack the cover on their differentials? Yes the ring and pinion may fail after hundreds of miles of hard use or after after tens of thousands of miles of light use. The question is can you live with a possible pending failure? The failure isn't likely to be sudden or catastrophic but a slow increase in noise and slop in the rear end.
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. ![]() RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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#9 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,525
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Re: Rust on ring and pinion
Coil of leaf rear, there is always putting in a 14b to get the ratio you want
Last edited by kwmech; 09-28-2021 at 09:54 PM. |
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#10 | |
Senior Member
![]() Join Date: Jun 2021
Location: West milford nj
Posts: 328
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Re: Rust on ring and pinion
Quote:
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#11 |
Registered User
Join Date: Apr 2005
Location: Cheyenne, WY
Posts: 742
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Re: Rust on ring and pinion
I agree with HO455. Bearings are a must. You can polish the gears making sure there are no high parts. They will still wear on each other (like me and my wife) and over time they will damage one another.
The pinion seems more troubling than the ring. If you did that, change the fluid frequently to prolong the inevitable. |
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#12 | |
Senior Member
![]() Join Date: Jun 2021
Location: West milford nj
Posts: 328
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Re: Rust on ring and pinion
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#13 |
Senior Member
![]() Join Date: Jun 2021
Location: West milford nj
Posts: 328
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Re: Rust on ring and pinion
What would be a direct bolt on replacement with 8 lug differential
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#14 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,525
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Re: Rust on ring and pinion
A 14bolt full float, there will be a little work with it. May have to move spring pads and play with the parking brake cables to get them to fit, along with moving shock mounts. I had an HO72 in my flatbed and replaced with a D70hd.
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#15 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,525
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Re: Rust on ring and pinion
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#16 |
Registered User
Join Date: Sep 2020
Location: Cleveland, Ohio
Posts: 531
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Re: Rust on ring and pinion
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#17 | |
Senior Member
![]() Join Date: Jun 2021
Location: West milford nj
Posts: 328
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Re: Rust on ring and pinion
Quote:
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#18 |
Senior Member
![]() Join Date: May 2017
Location: Dowagiac Michigan
Posts: 202
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Re: Rust on ring and pinion
Try these
Then go to 14 bolt in a a few years when it fails Good luck and have fun https://www.google.com/amp/s/torquek...52-ho72-axles/ |
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#19 | |
Senior Member
![]() Join Date: Jun 2021
Location: West milford nj
Posts: 328
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Re: Rust on ring and pinion
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#20 |
Senior Member
![]() Join Date: May 2017
Location: Dowagiac Michigan
Posts: 202
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Re: Rust on ring and pinion
So if you change your mind
Here is the correct link But at that price 14bolt makes sense I'm running one out of a 76 k20 In my 67 K20 https://torqueking.com/product/45231...ith-load-bolt/ |
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#21 |
Senior Member
![]() Join Date: Jun 2021
Location: West milford nj
Posts: 328
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Re: Rust on ring and pinion
So what yrs will fit ? There is one local for $175.00
With 4.10 ratio out of a 02 2500 Silverado. It says 10.5" ? |
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#22 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,717
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Re: Rust on ring and pinion
I’d wire brush it and send it… at least for awhile. Gears are stupid hard steel and if you aren’t loading heavily it might last for years. Or not… but I wouldn’t spend any money on the rest of the parts if keeping those gears.
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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#23 |
Senior Member
![]() Join Date: May 2017
Location: Dowagiac Michigan
Posts: 202
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Re: Rust on ring and pinion
I used a square body axle because it was the right width
I never looked into a more modern because I found the 76 first Hopefully others will chime in with more info |
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#24 |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,374
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Re: Rust on ring and pinion
This will not work as is, the Perches are way to wide. You’ll need to strip the perches, bump stop rests, and shock mounts from the housing and re perch it along with new shock mounts. It’s a couple inches wider than the 52 as well, but should be able to make it work. That axle likely has factory rear disks which is a huge plus.
__________________
Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 315/75/16's ‘87 IROC-Z all original 50K mile survivor TPI 305 IROC Blue ‘10 Camaro 2SS/RS Aqua Blue Metallic #93 -version 2.0 ![]() |
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#25 |
Senior Member
![]() Join Date: Jun 2021
Location: West milford nj
Posts: 328
|
Re: Rust on ring and pinion
So, and please forgive all the questions. While I've done several jeep restorations, older chevy trucks are new to me. This axle stuff is confusing. So here we go
What years can I retrofit to my truck ? Moving shock mounts and etc. Doesn't bother me but I want to stay with the same width. I see 14 bolts 10 1/2" 9 1/2" what do I want ? If I find one with 3.73 gears what do I need to convert front axle, I assume just a 3.73 ring and pinion ? And will the 3.73 be ok if I go with the TH350 Trans.? |
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