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Topic: Rear end 9.25? (Read 258 times)
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3406pk
Jr. Member
 Offline
Posts: 62
BigBlockDart.Com
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I have been looking for an 8.75 rear for my Duster with 520hp small block and 727 auto. So far I haven't found any 8.75 housing at A body length or 8.75 any length with posi to shorten. Lots of cases locally with 741 and some 742 carriers but nothing with posi. However I aquired a 77 Plymouth Fury Hiway Patrol car with 400 BB engine that has a 9.25 rear with suregrip 3.23 ratio. Question is the 9.25 as strong as the 8.75 and is it worth shortening for the Duster? Can the 9.25 axles be shortened? Appreciate opinions. At this time I would rather not buy new gears and new posi unit both.
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oldkimmer
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............With that many ponies, resplining factory axles is a no no............9.25s r plenty strong........kim.........
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MR. Mechanic...........Panther Pink Duster The Beast has been Unleashed!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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MyCreation68
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9 1/4 in a car? I've personally never heard of it but I guess it's possible. Personally I would keep looking for a 8 3/4. their very common in C-body's and 70's 2wd pickups. 91/4's have a weak point where the axle tubes taper down at the brake backing plates.
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Teach a child to be polite and courteous and, when he grows up, he'll never be able to merge his car onto the freeway.  -84 Dodge Ramcharger 318 auto 4x4 atc stock beast -68 Dodge Dart GT 6cyl auto buckets console work in progress -46 Fargo |
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DustMan
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Well, I am not to clear on the 'dont's' of running a 9.25, but you would likely be the first one here that has done so...
You will eventually run into an 8 3/4. There are 3 old trucks sitting in the junkyard 20 minutes from my house with them just sitting there for $200 a pop complete from drum to drum. They aren't extinct by any means.
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The enemy of performance is weight
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cu440da
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They've been called the poor mans Dana. I swapped one into a RR I had w/440, worked plenty good.
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'67 Notchback- 12.85 @ 109mph
440, M1, modified 750 Holley, .509 cam, template ported 906's, ProParts, 3" x-piped mandrel bent exhaust, Spintech's, 4.10 Sure Grip, 3200 stall, CalTracs and mono's, RR hood bulge fresh air system
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3406pk
Jr. Member
Offline
Posts: 62
BigBlockDart.Com
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I will keep looking for 8.75 too, but thanks for info. I'll check with Moser to see if there are new axles available for the 9.25. Thanks
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coors00
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9 1/4 weaker than 8 3/4. I know
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