8.25 to a 8.75 rear with 4 speed, different driveshaft?
#167292
12/13/08 09:39 PM
12/13/08 09:39 PM
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Joined: Jan 2003
Posts: 1,018 Hazlet, NJ
440Satellite
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,018
Hazlet, NJ
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Hello, My 72 Duster currently has a 318, 4 speed OD tranny and an 8 1/4 rear out of an F-body(wider), and I'm looking for a new stock width or narrower rear to replace it. Will the driveshaft need to be swaped if I go from an 8 1/4 to an 8 3/4 rear? If so does it need to be longer or shortened? I havent found one yet but I want to get all my info together. The car has the springs moved in 3"s on each side and I plan on mini-tubbing it and with the 59 1/2" rear in it now it would be almost imposible to find wheels with that much backspacing. Thanks
Butch Hazlet, NJ
1972 Duster
318 4 speed
1958 392 Hemi engine
waiting to be built!!!!!
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Re: 8.25 to a 8.75 rear with 4 speed, different driveshaft?
[Re: farmington]
#167294
12/13/08 10:01 PM
12/13/08 10:01 PM
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Joined: Jan 2003
Posts: 1,018 Hazlet, NJ
440Satellite
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,018
Hazlet, NJ
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Ok, thanks, figured it wouldnt be the same. Yeah I dont know what the current driveshaft is now, I would quess the small u-joints with a 318, but I'll have to check. What does a new driveshaft cost, ballpark?
Butch
1972 Duster
318 4 speed
1958 392 Hemi engine
waiting to be built!!!!!
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Re: 8.25 to a 8.75 rear with 4 speed, different driveshaft?
[Re: 68Fastback]
#167296
12/14/08 12:10 AM
12/14/08 12:10 AM
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Joined: Jan 2003
Posts: 1,018 Hazlet, NJ
440Satellite
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,018
Hazlet, NJ
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The rear is 59 1/2" from the outsides of the drums or wheel mounting surfaces , I know the A-Bodies are around 57 1/8 drum to drum, so I figure a stock A body or narrowed rear would work good, something 52-58" Drum to drum maybe.
1972 Duster
318 4 speed
1958 392 Hemi engine
waiting to be built!!!!!
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Re: 8.25 to a 8.75 rear with 4 speed, different driveshaft?
[Re: 69L78Nova]
#167299
12/14/08 12:01 PM
12/14/08 12:01 PM
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Joined: Jan 2003
Posts: 1,018 Hazlet, NJ
440Satellite
OP
super gas
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OP
super gas
Joined: Jan 2003
Posts: 1,018
Hazlet, NJ
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Yeah its only a mildly modified 318 and aluminum 4 speed od tranny. I do plan on building a 408 stroker in the future but thats a ways off(probably 2 years ), plus I dont know if I'd stick with the 4 speed or go with a 727 instead. I would guess that the driveshaft length would be different with a 4 speed and a 727 tranny, right?
1972 Duster
318 4 speed
1958 392 Hemi engine
waiting to be built!!!!!
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Re: 8.25 to a 8.75 rear with 4 speed, different driveshaft?
[Re: 440Satellite]
#167300
12/14/08 12:19 PM
12/14/08 12:19 PM
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Joined: Apr 2007
Posts: 2,327 Glendale, AZ
69L78Nova
Banned. Forever.
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Banned. Forever.
Joined: Apr 2007
Posts: 2,327
Glendale, AZ
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Yes, the 727 tailshaft is longer than an A-body 833 tailshaft.
1969 Nova 454/M21/3.31 Mild mid-11 second weekend cruiser
1994 F150 XLT Super Cab 2WD 5.0/4R70W/3.55 (Daily driver)
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