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Can 5 on 4" axles be drilled to 5 on 4.5"? #78758 06/23/08 02:01 PM 06/23/08 02:01 PM
Joined: Jun 2003 Posts: 746 Missouri NFURY8 OP super street
NFURY8 OP super street Joined: Jun 2003 Posts: 746 Missouri	Is there enough material on a 70 Duster axle to be drilled out to 4.5"? I think it is an 8 3/4". I haven't seen the car and am trying to help a friend convert to disc brakes from a distance. He thinks it was originally an 8 1/4" axle. C-Body DryDock Bigger is Better!

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: NFURY8] #78759 06/23/08 02:02 PM 06/23/08 02:02 PM
Joined: Sep 2003 Posts: 1,615 Table Rock Lake Missouri F furious top fuel
furious top fuel F Joined: Sep 2003 Posts: 1,615 Table Rock Lake Missouri	Sure, we used to do it all the time, before there were so many options.

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: furious] #78760 06/23/08 02:26 PM 06/23/08 02:26 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Best deal is to weld the old holes shut and then drill the new pattern to accept 1/2" screw in studs rather than the knurled press ins. That way there is very close to the same amount of meat left between the stud and the lip of the flange as there was on the old 7/16 knurled press in studs. Clean it, if it's Dirty. Oil it, if it Squeaks. But: Don't fix it, if it Works!

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: MoparforLife] #78761 06/23/08 08:06 PM 06/23/08 08:06 PM
Joined: Jul 2007 Posts: 11,836 Florida M mopar346 Let me tell ya about fat chicks!
mopar346 Let me tell ya about fat chicks! M Joined: Jul 2007 Posts: 11,836 Florida	Have some truck axles cut down, properly looking at comparable money and you end up with a better product and can sell the SBP axles to someone who wants them, probably come out money ahead. Careful, your character's showing!

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: mopar346] #78762 06/23/08 08:56 PM 06/23/08 08:56 PM
Joined: Nov 2006 Posts: 396 California, USA P Phil Saran enthusiast
Phil Saran enthusiast P Joined: Nov 2006 Posts: 396 California, USA	You've been given good advice. If you have the SBP axels redone, you also need to have the drums redrilled too. Runs about $125.00 to do two axels & drums. If you have truck or "C" body axels cut and resplined, yes you do end up with stronger axels,but it does require changing over to "B" or "C" body brakes also because the axles will sit out a bit more than the "A" axels do. Phil Saran Parker, Colorado

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: Phil Saran] #78763 06/23/08 10:54 PM 06/23/08 10:54 PM
Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada R RUNCHARGER I Live Here
RUNCHARGER I Live Here R Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada	My 71 Duster had the axles redrilled to the 4.5 pattern. The 4.5 pattern put the holes right at the edge of the axle, I wasn't too crazy about it. Sheldon

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: RUNCHARGER] #78764 06/24/08 08:48 AM 06/24/08 08:48 AM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Quote: My 71 Duster had the axles redrilled to the 4.5 pattern. The 4.5 pattern put the holes right at the edge of the axle, I wasn't too crazy about it. Sheldon Exactly why I prefer screw in studs. There is very near as much meat around the stud as with the pressed in small suds on the 4" pattern. Clean it, if it's Dirty. Oil it, if it Squeaks. But: Don't fix it, if it Works!

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: NFURY8] #78765 06/24/08 10:46 AM 06/24/08 10:46 AM
Joined: Mar 2003 Posts: 18,678 Fresno, CA Jim_Lusk I Live Here
Jim_Lusk I Live Here Joined: Mar 2003 Posts: 18,678 Fresno, CA	A 70 Duster had a 7-1/4 or an 8-3/4. You need to know what he has first. The cheapest alternative is a junkyard 8-1/4 that is already big bolt, but watch the gear ratios. The one I pulled for somebody else was a 2.45:1 (no, that's not a typo). I don't like the redrilling for several reasons, but the big one is that now you have brakes that are already hard to get drums for, but if you need them you'll have to get them drilled out, too.

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: Jim_Lusk] #78766 06/24/08 01:33 PM 06/24/08 01:33 PM
Joined: Jun 2003 Posts: 746 Missouri NFURY8 OP super street
NFURY8 OP super street Joined: Jun 2003 Posts: 746 Missouri	Looks like he is now giving new axles from Moser a strong consideration. Thanks for the info guys! C-Body DryDock Bigger is Better!

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: NFURY8] #78767 06/25/08 01:19 AM 06/25/08 01:19 AM
Joined: Jan 2003 Posts: 8,016 Polson, MT DoctorDiff master
DoctorDiff master Joined: Jan 2003 Posts: 8,016 Polson, MT	I stock high-strength 5 x 4 1/2" A-body axles with bearings and studs installed. E-mail me if you are interested. Contact info

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: MoparforLife] #78768 06/25/08 02:53 AM 06/25/08 02:53 AM
Joined: Jan 2003 Posts: 27,465 So Cal autoxcuda Too Many Posts
autoxcuda Too Many Posts Joined: Jan 2003 Posts: 27,465 So Cal	Quote: Quote: My 71 Duster had the axles redrilled to the 4.5 pattern. The 4.5 pattern put the holes right at the edge of the axle, I wasn't too crazy about it. Sheldon Exactly why I prefer screw in studs. There is very near as much meat around the stud as with the pressed in small suds on the 4" pattern. My Barracuda is drilled and has the screw in cap screws for lugs. Mazzolini did that for $90 in 1993. From what I know now, I'm allmost sure he subbed that out to Sutton Engineering. I've put about 50K very hard miles on them over that last 15 years!! The rear drums are getting pretty warn though. I do run a adjustable MP brake valve though and 11.75 front disks. My use/abuse and milage would cover about 98% of the A-body owner here though.

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: NFURY8] #78769 06/25/08 10:09 AM 06/25/08 10:09 AM
Joined: Oct 2004 Posts: 8,165 Left Coast B BobR master
BobR master B Joined: Oct 2004 Posts: 8,165 Left Coast	Quote: Looks like he is now giving new axles from Moser a strong consideration. Thanks for the info guys! I would go with DR Diff over Moser and I would NEVER redrill stock flanges. For a couple of hundered bucks more you can have some much stronger axles. -Bob

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: BobR] #78770 06/25/08 10:35 AM 06/25/08 10:35 AM
Joined: Jan 2003 Posts: 177 J JCFcuda member
JCFcuda member J Joined: Jan 2003 Posts: 177	Theres nothing wrong with redrilling the axles. I used bolts 4 years on the street,4,ooo miles/yr . The last year at the strip, I ran 10. 80s. 10.5 slicks.and did not have any issues. I welded the holes redrilled the holesin the axles and drums. Jim

Re: Can 5 on 4" axles be drilled to 5 on 4.5"? [Re: JCFcuda] #78771 06/25/08 08:23 PM 06/25/08 08:23 PM
Joined: Oct 2004 Posts: 8,165 Left Coast B BobR master
BobR master B Joined: Oct 2004 Posts: 8,165 Left Coast	Quote: Theres nothing wrong with redrilling the axles. I used bolts 4 years on the street,4,ooo miles/yr . The last year at the strip, I ran 10. 80s. 10.5 slicks.and did not have any issues. I welded the holes redrilled the holesin the axles and drums. Jim I guess the tech inspector never looked. If you use a locked rear or run faster than 10.99 you must use aftermarket axles for most if not all sanctioning bodies. -Bob

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