Rear End Swap? How to?

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Rear End Swap? How to?

Postby fas141 » Thu Sep 02, 2021 4:43 pm

So I have a 77 factory V8 4-speed Monza hatchback. I just picked up a 77 factory V8 automatic Monza hatchback. My Monza has an open rear and the other Monza has a positraction rear. What would be the best way to get the posi rear into my Monza. I was thinking of swapping drum to drum but my housing and brakes are all good while the other is rusty and needs brakes and drums etc. So maybe not that way? Can you just pull the axles back and the center comes out and swap it that way? Any help is appreciated. Thanks.
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Re: Rear End Swap? How to?

Postby HI WINDING MONZA » Thu Sep 02, 2021 7:42 pm

90% of the time it works, so give it a try. If its one those factory clutchless posi's , it wont last long.( broke one with a 151 4 speed , had to be torched out , cross pin bolt broke, cross pin spun in the carrier and wedged in solid)

Just check your pattern on gears with white grease, you can use the shims from both rears to get the pattern right if need be, but it should be a drop in.

What gears ratio do they have?

Doug in P.R. 8)
My Old Monza now lives in Arizona with its newest owner.

The 90's just keep rollin' along........
1990 Chevrolet Silverado Regular Cab Long Bed 350 TBI V8 700R4 112K miles
1992 Pontiac Sunbird Coupe 2.0 OHC MPFI I4 TH125C 154k miles
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Re: Rear End Swap? How to?

Postby fas141 » Thu Sep 02, 2021 7:51 pm

I mostly know Mopar rears, so I was wondering if the center section comes out intact like a 8 3/4 Mopar. I might be better off swapping drum to drum and switch the brake stuff over. I do not want to take the center section apart.
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Re: Rear End Swap? How to?

Postby 283vega » Fri Sep 03, 2021 4:53 am

No the center section does not come out in tact like a ford or mopar. The pinion gear is bolted through the front of the housing. Sounds like a completr rear swap is what you need to do.
283 vega
70 corvette


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Re: Rear End Swap? How to?

Postby HI WINDING MONZA » Fri Sep 03, 2021 3:37 pm

fas141 wrote:I do not want to take the center section apart.


I thought that is what you wanted to do....
My Old Monza now lives in Arizona with its newest owner.

The 90's just keep rollin' along........
1990 Chevrolet Silverado Regular Cab Long Bed 350 TBI V8 700R4 112K miles
1992 Pontiac Sunbird Coupe 2.0 OHC MPFI I4 TH125C 154k miles
User avatar
HI WINDING MONZA
 
Posts: 3183
Joined: Thu Jun 29, 2006 7:37 pm
Location: Salinas, Puerto Rico


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