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Tech Question
Mike Close, Chattaroy, WA, 1975, Plymouth, Duster, 225
I have a question about the durability of 9 1/4" dodge axle. How stronge is it compared to an 8 3/4 or Dana 60? I have one out of a Ramcharger, and want to know if it is worth narrowing and putting under my duster when I build a 451 for it. Thank you Mike Close
Absolutely! While not as strong as the Dana 60, it's quite a bit stronger than the 8-3/4", lots cheaper and easier to find, and only slightly heavier. The currently available Sure-Grip is even the Spicer clutch type!
When you have it narrowed, you'll have to decide whether to stay with the C-clip type of axle retention, or convert to Ford pickup truck wheel bearings. My choice is the first option. Moser Engineering can handle either. Be sure to use the later (roughly '85-up) large C-clip setup (and a corresponding late diff.)
Another plus is that it's a super-easy rear to work on. The externally-adjustable backlash and diff bearing preload is a wonderful thing! And the crush spacer is beefy, eliminating the occasional failed spacer syndrome seen in #489 8-3/4" axles, while making pinion setup a snap.
Go for it.
Rick
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