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#1 |
Registered User
Join Date: Jun 2014
Location: reno nv
Posts: 10
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Too much diff backlash?
I have a 1968 C20 with low miles (57k) and a No Spin axle. It seems like it has a little too much backlash in the differential. The drive shaft will turn a little over 30 degrees one way when turned by hand. Does that sound excessive? I cannot find a spec in the service manual.
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#2 |
Registered User
Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
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Re: Too much diff backlash?
I don't think you can accurately determine backlash using that method.
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My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe |
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#3 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,549
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Re: Too much diff backlash?
What he said^^^. What you are feeling is the slop (for lack of a better term) in the complete set-up, especially with the posi. Totally normal unless you have an unusual noise or something else going on
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#4 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,720
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Re: Too much diff backlash?
The "No Spin" and mechanical lockers of that style including the later Detroit Locker and the LockRights are known for driveline backlash. But it's NOT the same as backlash in the gear set.
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#5 |
Registered User
Join Date: Jun 2014
Location: reno nv
Posts: 10
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Re: Too much diff backlash?
Thanks for your responses. That was a generic use of the term backlash to cover any and all looseness in the differential. Didn't mean to imply the gear backlash used to set up the ring and pinion fit. Maybe hysteresis would have been more appropriate.
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