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11-21-2017, 11:12 PM
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#1 |
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Registered User
Join Date: Jul 2014
Location: Center Point Texas
Posts: 17
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Diff help
I have a 71 c20 with a eaton ho52 it started a winning noise what can I do to fix it or what diff should I use to replace it
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11-21-2017, 11:23 PM
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#2 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,709
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Re: Diff help
Easiest is just replace the "chunk" as the 9" guys call the complete gear/differential setup in the housing if you can find a good used one.
I would look for a Dana 60 if you are looking for a bolt-in swap, but if you can fab then either a Full-Float 14 bolt if you work the truck pretty hard or a semi-float would be great if you just use it and don't abuse it. Either are fairly common with 3.73 or 4.10 gears. If you have 4.57 and want to keep them, the full-float 14 bolts are out there with 4.56 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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11-21-2017, 11:40 PM
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#3 |
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Registered User
Join Date: Jul 2014
Location: Center Point Texas
Posts: 17
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Re: Diff help
What kind of fab would need to be done for 14 bolt
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11-21-2017, 11:54 PM
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#4 | |
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Senior Member
 Join Date: Mar 2003
Location: Colfax-California
Posts: 8,389
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Re: Diff help
Quote:
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11-21-2017, 11:57 PM
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#5 |
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Registered User
Join Date: Jul 2014
Location: Center Point Texas
Posts: 17
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Re: Diff help
Its coil
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11-22-2017, 01:25 AM
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#6 |
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Registered User
Join Date: Nov 2006
Location: KINGSPORT,TN.
Posts: 3,035
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Re: Diff help
install a modern 14 bolt or dana 70
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I BELIEVE IN JOHN 3:16 |
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11-22-2017, 02:27 AM
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#7 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,497
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Re: Diff help
Is it whining all the time? Or only while accelerating, or.....?
Reason I ask is many years ago, mine started making a slight noise on deceleration only. Turned out to be a slightly pitted pinion pocket bearing. New bearing fixed it and it's been good ever since.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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11-22-2017, 09:10 PM
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#8 |
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Registered User
Join Date: Jul 2014
Location: Center Point Texas
Posts: 17
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Re: Diff help
All the time
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11-22-2017, 09:50 PM
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#9 |
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Registered User
Join Date: Nov 2006
Location: KINGSPORT,TN.
Posts: 3,035
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Re: Diff help
to fix it right you need to completely strip it down and go thru it. if you can get the parts. all else is jack legging it.
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I BELIEVE IN JOHN 3:16 |
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11-22-2017, 09:51 PM
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#10 | |
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Registered User
Join Date: Jul 2014
Location: Center Point Texas
Posts: 17
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Re: Diff help
Quote:
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11-23-2017, 01:49 AM
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#11 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,497
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Re: Diff help
From what I have heard, bearings are common but gearsets are like hen's teeth. Good luck.
__________________
- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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11-25-2017, 09:39 AM
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#12 |
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Registered User
Join Date: Jul 2014
Location: Center Point Texas
Posts: 17
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Re: Diff help
No use looking for bearings inner pinion bearing housing has a big chunk missing
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11-27-2017, 09:03 PM
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#13 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,709
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Re: Diff help
Bolt in solution is either a donor center section or Dana 60. IMO, the best solution is a later model housing with shock and mounts replaced. The semi-float 14 bolt is cheap and as strong as the Dana 60. May not have the panache though. The full 14 bolt is almost as cheap and super stout.
__________________
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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