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I think 4.11s replaced the 4.30 in 1971. By Dave Shoe - 05/19/2001 1:27:48 AM; IP 216.243.158.33 I'm just going by memory - it's been a long time since I reviewed that info. I do recall that the 4.11 was a 1971-later thing. I believe the 4.30 disappeared in 1971. For '69-'70 3.91 and 4.30 was the drag-pak deal. I don't know about 1968 at all, but I suspect the rules changed half-way through 1968 when the Traction-lok first hit the production line, replacing the earlier Equa-Lock differential in performance applications. Also from memory, I recall there were three Drag-pak axle options in 1969-70: 3.91:1 Traction-lok 4.30:1 Traction-lok 4.30:1 Detroit Locker Please don't consider this post as fact - hopefully it'll give you an idea or two to help you find the info you need. Shoe.

This thread, so far...

Skip Navigation Links.  1968 Mustang Axle Code "Y" -- Scott Hollenbeck, 05/18/2001  RE: 1968 Mustang Axle Code "Y" -- Bob Thrower, 05/18/2001 I think 4.11s replaced the 4.30 in 1971. -- Dave Shoe, 05/19/2001  Definitely 4.30, Scott, but 'proof' isn't handy at the moment. [n/m] -- Mr F, 05/25/2001  RE: Y code is 4.30 kevin marti verified -- Paul R, 05/27/2001

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