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Myron Piatek · 07-26-2020, 08:47 PM

It's been a few years since I switched from a braced 8 3/4" to a Dana 60, partially to gain some weight and was confident of no ET loss. I think it was only about 30-40lbs difference. Haven't run the car much, though.

Dana 60 is more efficient than an 8 3/4, but not more than a 12 bolt. (I recall an magazine article from the '70's or 80's. Not much, but it's there.) When bigger parts are cut down, like shaving weight from a ring & pinion, spools, etc. the differences in weight will be reduced. A 12 bolt will help in weight & efficiency over a Dana 60, but I have no idea about the actual weight comparison and it may sacrifice a bit too much durability. Seems like the ring & pinion is the weak link in an 8 3/4 as well as the 12 bolt.

Lightened ring rear, drilled axles w/milled flanges, Kirkey seats, aftermarket brakes?

07-26-2020, 08:47 PM	#15
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,542 Likes: 34 Liked 138 Times in 51 Posts	Re: 12 bolt vs Dana 60 It's been a few years since I switched from a braced 8 3/4" to a Dana 60, partially to gain some weight and was confident of no ET loss. I think it was only about 30-40lbs difference. Haven't run the car much, though. Dana 60 is more efficient than an 8 3/4, but not more than a 12 bolt. (I recall an magazine article from the '70's or 80's. Not much, but it's there.) When bigger parts are cut down, like shaving weight from a ring & pinion, spools, etc. the differences in weight will be reduced. A 12 bolt will help in weight & efficiency over a Dana 60, but I have no idea about the actual weight comparison and it may sacrifice a bit too much durability. Seems like the ring & pinion is the weak link in an 8 3/4 as well as the 12 bolt. Lightened ring rear, drilled axles w/milled flanges, Kirkey seats, aftermarket brakes? __________________ LOCOMOTION Racing Last edited by Myron Piatek; 07-26-2020 at 08:52 PM.