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WTB: EM posi cover
Posted by: Tramp61 ()
Date: November 22, 2022 07:06PM

Looking for a used early posi cover. Does anyone have one they are willing to part with?

Craig T
Central NY
1961 Tramp (truck with a ramp)

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Re: WTB: EM posi cover
Posted by: dryenko ()
Date: November 23, 2022 06:47AM

You should be looking for the carrier unit.
The 2 halves are made as a matched pair by GM.
Mixing these parts can [ usually ] give you bad ring /pinion gear gear engagement pattern.
Unless you true up the ring gear gear mating face on the carrier bearing centers
Don't bother asking how I know this..
And the same is true for the aftermarket 4 spider carriers.
They can be "close " but not perfect.
I true mine up as a assembly in a precision level lathe.
Caveat : YEMV

Bob C aka Dryenko
Dobson, NC 27017



Edited 1 time(s). Last edit at 11/23/2022 06:48AM by dryenko.

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Re: WTB: EM posi cover
Posted by: Tramp61 ()
Date: November 23, 2022 08:07AM

Thank you for your response Dryenko. So if I can locate a cover, true the mating surfaces, and get a good contact pattern, I think I can be Ok with that. This is going in an 80 hp Rampside, and it will certainly not be getting abused by me. I understand the 4 spider setup is ideal, but not within my budget for this application.

I appreciate the heads up on truing the mating surfaces. I will follow your advice.

Craig T
Central NY
1961 Tramp (truck with a ramp)

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Re: WTB: EM posi cover
Posted by: v8vair ()
Date: November 23, 2022 09:52AM

If your going to go through all that get a late cover, machine the shoulder off where the bearing rides, use the cover to redrill your existing 6 bolt housing.
The late is much stronger.
GM R&Ps are very forgiving when setting up

1964 Bill Thomas Monza Replica Racer
1964 Spyder Street Car
1998 Honda Prelude Dirt track car
1967 Crown V8 under construction
Mike Levine
Cumming Georgia
North of Atlanta

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Re: WTB: EM posi cover
Posted by: Tramp61 ()
Date: November 23, 2022 02:20PM

Thank you v8vair. Will investigate that possibility.

Craig T
Central NY
1961 Tramp (truck with a ramp)

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Re: WTB: EM posi cover
Posted by: Vairismo ()
Date: November 23, 2022 05:15PM

Let the negotiations begin!

[corvaircenter.com]



Edited 1 time(s). Last edit at 11/23/2022 05:16PM by Vairismo.

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