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09-28-2021, 07:31 PM | #1 |
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Join Date: Jun 2021
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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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09-28-2021, 07:50 PM | #2 |
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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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09-30-2021, 11:49 PM | #3 |
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Re: Rust on ring and pinion
I agree. It appears to me there's more than rust going there. Those gears actually look pitted to me. I guess if you're willing to deal with a complete grenade at some point, it would be a fun experiment to see how long it would last if you put it back together and run it. Don't know if you have the extra time for that or not. New is the only way to deal with it one time.
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1972 Chevy C-10, SWB, Fleet, 350/350, PS, PB, HEI, mostly stock, Survivor. |
10-01-2021, 10:00 PM | #4 |
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Re: Rust on ring and pinion
3.73 don’t exist for the HO axle which is why you can’t swap them in. Don’t forget that front has to match rear with gear ratio.
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09-28-2021, 07:52 PM | #5 |
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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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09-28-2021, 07:55 PM | #6 |
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Re: Rust on ring and pinion
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09-28-2021, 08:00 PM | #7 |
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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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09-28-2021, 08:35 PM | #8 |
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Re: Rust on ring and pinion
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09-28-2021, 09:28 PM | #9 |
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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.
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s |
09-28-2021, 09:38 PM | #10 |
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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.
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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 |
09-29-2021, 10:24 AM | #11 |
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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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09-29-2021, 11:11 AM | #12 |
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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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09-29-2021, 07:14 PM | #13 |
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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.? |
09-30-2021, 03:02 PM | #14 | |
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Re: Rust on ring and pinion
Quote:
So your truck is a 4x4? K20 or K30? We'd love to see some pictures. And 3.73's would be fine with the TH350. Just be aware the front carrier will only work with 3.73 and numerically larger gears. The link has more information. https://www.drivetrainamerica.com/bl...als-explained/
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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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09-30-2021, 03:38 PM | #15 | |
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Re: Rust on ring and pinion
Quote:
According to your link I can't put 3.73 in a 4.10 differential ? What it looked like when I picked it up What it looks like now Last edited by Johnl48; 10-04-2021 at 07:16 AM. |
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10-03-2021, 12:45 PM | #16 |
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Re: Rust on ring and pinion
Your truck's progress is looking good. Keep us posted.
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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 |
09-30-2021, 11:34 PM | #17 | |
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Re: Rust on ring and pinion
Quote:
I wanted to point out there are limitations to ring and pinion swaps if changing the carrier is not an option. That information may limit your rear axle choices.
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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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09-29-2021, 07:50 PM | #18 |
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Re: Rust on ring and pinion
You will need a 10.5” to be comparable in strength to the HO52 as well as being bolt in. A square body K30 1 ton (77-87(91) will have the correct 40.5” axle perch spacing and be a 10.5” full floater. You will only have to cut and re-weld one shock mount for it to be bolt in. You will need to re gear your front axle to 3:73 If changing ratios. 3:73 should be fine with a th350 if on stockish size tires. If you are lifted and on 33-35’s I’d suggest 4:11.
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s |
09-30-2021, 04:17 AM | #19 |
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Re: Rust on ring and pinion
Something else to think about. What does the inside front differential look like? Is it as rusty as the rear? Is there any rust in the axle housing? I would derust everything, buy any new parts I could find, polish the ring and pinion and put it back together. The longer you drive it, the less you will even remember that there was rust in there.
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09-30-2021, 08:14 PM | #20 |
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Re: Rust on ring and pinion
That whole carrier, ring, pinion, and all bearings are trash. Period.
Could it function for a while? Maybe. Define "a while." I would 100% not reuse any of that. |
10-02-2021, 12:14 AM | #21 |
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Re: Rust on ring and pinion
John,
I have a Eaton Dually axle that I am about to scrap. I wonder if anything off it could help you out. Smitty
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10-03-2021, 07:50 PM | #22 |
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Re: Rust on ring and pinion
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10-03-2021, 08:46 PM | #23 | |
Its a Truck Thing......
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Re: Rust on ring and pinion
Quote:
Smitty
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71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 69 C30 Former Motor Home, Flat Bed time 70 G20 Red-E-Kamp Conversion "I'm your Boogy Van" |
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10-04-2021, 07:00 AM | #24 |
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Join Date: Jun 2021
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Re: Rust on ring and pinion
Would these work ??
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10-04-2021, 08:27 AM | #25 |
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Re: Rust on ring and pinion
The front will bolt up. The rear will need the perches and shock mounts moved. The rear has to come from a 1 ton 4x4 to be basically bolt in minus 1 shock mount.
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s |
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