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Axle swap 7.25 small bolt to big bolt #1610182 04/21/14 10:14 AM 04/21/14 10:14 AM
Joined: Mar 2012 Posts: 19 Bethany, OK M my74dart OP member
my74dart OP member M Joined: Mar 2012 Posts: 19 Bethany, OK	Anyone done this swap that can give some advice? I'm finally getting around to swapping out my 7.25 inch small bolt rear end, currently under my 74 Dart Swinger, for one I pulled out of a donor A body a few years back. Since both are A body 7.25 rear ends, can I simply swap the axles and all of the brake hardware instead of removing the whole rear end? I was initially planning to rebuild the new unit and then swap it out wholesale, but I think I'd rather just swap out axles, seals and brakes. Thoughts?

Re: Axle swap 7.25 small bolt to big bolt [Re: my74dart] #1610183 04/21/14 11:26 AM 04/21/14 11:26 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: Thoughts? iirc there is a difference (bearings/housing inner dia) somewhere inside that precludes you from swapping SBP axles into a BBP housing & vice versa. Swap the whole rear end. There are sure grips available (clutch and cone) but they are pretty scarce but they sure function nice in snow on a DD A body and Randy's has improved spider gears which is the weak(est) point on them (you did say you are going thru it) but as you know they cant take a whole lot of hot rodding. EDIT Split the u bolt nuts with a nut cracker (Sears has one that works good) and rethread the shank below the nuts with a "thread chasing" not a regular die then easily take off the nuts. You might have to undo the nuts slightly so you can get at em with the cracker. Trust me on this one. Last edited by RapidRobert; 04/21/14 11:35 AM. live every 24 hour block of time like it's your last day on earth

Re: Axle swap 7.25 small bolt to big bolt [Re: RapidRobert] #1610184 04/21/14 12:40 PM 04/21/14 12:40 PM
Joined: Jan 2003 Posts: 3,920 n.e. pa. 6 65rbdodge master
65rbdodge master 6 Joined: Jan 2003 Posts: 3,920 n.e. pa.	yes, there is a difference in the retainers, I tried this a few years ago on my 69 valiant. I had a 73 7.25 rear and the axels would not swap into the 69, I just had to swap the entire rear.

Re: Axle swap 7.25 small bolt to big bolt [Re: 65rbdodge] #1610185 04/21/14 02:35 PM 04/21/14 02:35 PM
Joined: Jan 2003 Posts: 20,179 Park Forest, IL slantzilla Too Many Posts
slantzilla Too Many Posts Joined: Jan 2003 Posts: 20,179 Park Forest, IL	Wheel bearing, retainer, and spacing from the bearing to the flange are all different. "Everybody funny, now you funny too."

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