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New Product - '62-'72 A-Body 5 x 4.5" pattern 7.25" axles #3014678
02/12/22 12:03 PM
02/12/22 12:03 PM
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Polson, MT
DoctorDiff Offline OP
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https://www.doctordiff.com/axle-pkg-7-1-4-mopar-5x4-1-2-bolt-pattern-pair.html

This is an industry first.

DoctorDiff 5 x 4.5" bolt pattern conversion axles fit '62-'72 A-body 7.25" rearends. Must use open ended 1/2"-20 lug nuts.

Will NOT fit '73-'76 A-body 7.25" rears.

New 5 x 4.5" bolt pattern 7.25" 9" and 10" drums are also available.

Re: New Product - '62-'72 A-Body 5 x 4.5" pattern 7.25" axles [Re: DoctorDiff] #3014776
02/12/22 06:16 PM
02/12/22 06:16 PM
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Round Lake Beach, Illinoisy
Rhinodart Offline
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That is awesome Cass! up Can you tell me what the differences are in the late 7-1/4"? shruggy


The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!
Re: New Product - '62-'72 A-Body 5 x 4.5" pattern 7.25" axles [Re: Rhinodart] #3014815
02/12/22 07:42 PM
02/12/22 07:42 PM
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Park Forest, IL
slantzilla Offline
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73-76 7.25 with BBP has a larger wheel bearing on it Jim. The spacing for the brake is also different.


"Everybody funny, now you funny too."
Re: New Product - '62-'72 A-Body 5 x 4.5" pattern 7.25" axles [Re: slantzilla] #3014822
02/12/22 08:01 PM
02/12/22 08:01 PM
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Sniper Offline
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Originally Posted by slantzilla
73-76 7.25 with BBP has a larger wheel bearing on it Jim. The spacing for the brake is also different.


I assume Dr Diff's new LBP axles would use the normal 4.5" pattern brakes so they ought to have the same spacing as the 73-76 axles do.

Re: New Product - '62-'72 A-Body 5 x 4.5" pattern 7.25" axles [Re: Sniper] #3014971
02/13/22 10:32 AM
02/13/22 10:32 AM
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Mesa, Arizona
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So, can the 73 and up 7.25 10” brake drums and backing plates be used on a 8.75?

Re: New Product - '62-'72 A-Body 5 x 4.5" pattern 7.25" axles [Re: dart4forte] #3015127
02/13/22 06:47 PM
02/13/22 06:47 PM
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Park Forest, IL
slantzilla Offline
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Originally Posted by dart4forte
So, can the 73 and up 7.25 10” brake drums and backing plates be used on a 8.75?


Yes, I've done it multiple times. boogie


"Everybody funny, now you funny too."
Re: New Product - '62-'72 A-Body 5 x 4.5" pattern 7.25" axles [Re: dart4forte] #3015320
02/14/22 11:12 AM
02/14/22 11:12 AM
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Polson, MT
DoctorDiff Offline OP
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''73 and newer 5 x 4.5" bolt pattern brakes taken from a 7.25" rear will interchange onto a 5 x 4.5" bolt pattern 8.75" rear.

My new 5 x 4.5" bolt pattern 7.25" conversion axles use stock '72 and earlier 9" or 10" A-body drum brake hardware and backing plates. You must re-drill the brake drums or purchase my new 5 x 4.5" bolt pattern drums.

Re: New Product - '62-'72 A-Body 5 x 4.5" pattern 7.25" axles [Re: DoctorDiff] #3016353
02/17/22 05:09 PM
02/17/22 05:09 PM
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Posts: 42,109
Round Lake Beach, Illinoisy
Rhinodart Offline
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Originally Posted by DoctorDiff
''73 and newer 5 x 4.5" bolt pattern brakes taken from a 7.25" rear will interchange onto a 5 x 4.5" bolt pattern 8.75" rear.

My new 5 x 4.5" bolt pattern 7.25" conversion axles use stock '72 and earlier 9" or 10" A-body drum brake hardware and backing plates. You must re-drill the brake drums or purchase my new 5 x 4.5" bolt pattern drums.


As always, you DA MAN Cass! up


The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!






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