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8 inch shafts vs 9 inch shafts (both 28 spline)

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Author	Topic: 8 inch shafts vs 9 inch shafts (both 28 spline)
ukracer Gearhead Posts: 166 From: South Wales UK Registered: Apr 2003	posted 11-20-2003 03:00 PM A friend is struggling to find a complete 9 inch axle for his Mustang which will have a warm 460 soon. In the past, I have 'made' a 9 inch using a 9 inch case with the original 8 inch ends welded on to take the original 8 inch shafts so the length is the same overall. Obviously the diff is all 9 inch (28 spline) so the 8 inch 28 spline shafts fit with no machining. This was in a Mustang with a 351W and nitrous/slicks and gave no trouble but I am wondering if the shafts will take the gaff of a 460, or are they the same strength as original 9 inch 28 spline shafts? This axle will not be using 'drag' type gears so the shafts will not 'see' as much torque as say 4.11's. Probably be 2.75's or 3.00's. Any ideas? Cheers, Martin. IP: Logged
steve'66 Gearhead Posts: 9489 From: Sonoma,CA,USA Registered: Mar 2000	posted 11-20-2003 03:09 PM Martin, I think that will work for your friends warm 460 w/ street gearing. The 8" axle is equal to the 9" 28 spline axle. SteveW IP: Logged
Dubz Gearhead Posts: 1890 From: Manitoba Canada Registered: Oct 2002	posted 11-20-2003 05:05 PM I would say they would hold up if they are using that high of a gear, there isn't alot of torque that the axles see with that ratio now with a 3.70 or so it would be iffy IP: Logged
ukracer Gearhead Posts: 166 From: South Wales UK Registered: Apr 2003	posted 11-20-2003 05:43 PM Thanks for the replies, it's about what I thought (and hoped). Even with the tall gears the car should still run well in the 12's which should be plenty for a novice (only has 302 now). Thanks. Cheers, Martin. IP: Logged

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