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Re: i want to redrill my small axles to large bolt pattern
[Re: Challenger 1]
#1521578
10/22/13 06:52 PM
10/22/13 06:52 PM
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Joined: Jan 2003
Posts: 43,517
Round Lake Beach, Illinoisy
Rhinodart
Rhinotruck
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Rhinotruck
Joined: Jan 2003
Posts: 43,517
Round Lake Beach, Illinoisy
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Back in the day I ruined a couple sets of axles and wheel wells.  I would never weaken the axle nowadays with plenty of big bolt axles available aftermarket.  Talk with Dr. Diff. 
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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Re: i want to redrill my small axles to large bolt pattern
[Re: Rick_Ehrenberg]
#1521582
10/23/13 03:01 AM
10/23/13 03:01 AM
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Joined: Jun 2004
Posts: 469
Hawaii
Dodgeballs
mopar
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mopar
Joined: Jun 2004
Posts: 469
Hawaii
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Quote:
You'll still have the small center register, so no wheels will pilot, and you'll have oddball drums. If you're bucks-down, just take a chop saw to C-body or pickup axle shafts.
Rick
Can any C-Body axles be cut to fit the A-Body 8 3/4? How much needs to be cut? What year trucks? I have re-drilled A-body axles right now, but would like the big register. I would still have to use the A-body drums and re-drill them, right?
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Re: i want to redrill my small axles to large bolt pattern
[Re: Dodgeballs]
#1521584
10/23/13 06:21 AM
10/23/13 06:21 AM
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Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
Rick_Ehrenberg
top fuel
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top fuel
Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
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Quote:
Quote:
You'll still have the small center register, so no wheels will pilot, and you'll have oddball drums. If you're bucks-down, just take a chop saw to C-body or pickup axle shafts.
Rick
Can any C-Body axles be cut to fit the A-Body 8 3/4? How much needs to be cut? What year trucks? I have re-drilled A-body axles right now, but would like the big register. I would still have to use the A-body drums and re-drill them, right?
No, you'd use brakes (complete) from any "big bolt" 8-3/4" (or even 8.25 / 9.25" with the same bolt pattern).
I used to have the data showing which donors had enough spline length to cut, but I cannot find it. Hopefully someone else will chime in.
Also inexpensive new axles are made specifically for this swap (Yukon, etc.)
Rick
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Re: i want to redrill my small axles to large bolt pattern
[Re: SLOW67]
#1521586
10/23/13 10:54 AM
10/23/13 10:54 AM
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Joined: Jan 2003
Posts: 43,517
Round Lake Beach, Illinoisy
Rhinodart
Rhinotruck
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Rhinotruck
Joined: Jan 2003
Posts: 43,517
Round Lake Beach, Illinoisy
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Like I said above after losing a couple redrilled axles (your use may vary)  I sent a pair of C-Body axles to Moser to have them cut and resplined (this was in 1980) and used the 11" C-Body brakes and never looked back. Now that there are plenty of ready to use axles I would go this route today.
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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Re: i want to redrill my small axles to large bolt pattern
[Re: MoparforLife]
#1521587
10/23/13 11:18 AM
10/23/13 11:18 AM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Quote:
Drilling and tapping using screw in studs leaves very near as much meat around the stud as the OEM original knurled pressed in studs
Quote:
The axles on my sons Dart were drilled to the large pattern and has screw in studs. It was done in 1997 and the axles are still in the car. It has been raced and driven over the years with no problems. Ron
You guys need to quit making sense.
I've done the same thing. Launching off a transbrake and running sub 1.50 60's.
Run stud centric wheels.
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Re: i want to redrill my small axles to large bolt pattern
[Re: Rhinodart]
#1521590
10/24/13 06:45 AM
10/24/13 06:45 AM
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Joined: Jun 2008
Posts: 10,847
Oakdale CT
gdonovan
I Live Here
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I Live Here
Joined: Jun 2008
Posts: 10,847
Oakdale CT
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Too close to the edge, I'm frugal and would not even consider it after looking into it.
Pick up some truck or a set of C-body axles and have Moser work their magic or if you are a fan of sealed bearings (I'm NOT) get some aftermarket axles.
"I think its got a hemi"
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Re: i want to redrill my small axles to large bolt pattern
[Re: gdonovan]
#1521591
10/24/13 01:14 PM
10/24/13 01:14 PM
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Joined: Jan 2003
Posts: 25,200
Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Quote:
Too close to the edge, I'm frugal and would not even consider it after looking into it.
Pick up some truck or a set of C-body axles and have Moser work their magic or if you are a fan of sealed bearings (I'm NOT) get some aftermarket axles.
Not if you usse screw in studs. There is all most as much meat around the stud as the large holed knurled type. You will break a stud before you break the flange.
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Re: i want to redrill my small axles to large bolt pattern
[Re: Dodgeballs]
#1521593
10/24/13 02:17 PM
10/24/13 02:17 PM
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Joined: Nov 2003
Posts: 5,048
Atlanta Indiana
Dave Watt
master
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master
Joined: Nov 2003
Posts: 5,048
Atlanta Indiana
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Quote:
Can any C-Body axles be cut to fit the A-Body 8 3/4?
No. There are only a few years in the early '70's that will work, and they are usually in a C-body wagon. The only way you can tell is that just past the splines will be the same diameter at the splines. Most are a smaller diameter in that area preventing them from being resplined.
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Re: i want to redrill my small axles to large bolt pattern
[Re: Cab_Burge]
#1521596
10/24/13 02:25 PM
10/24/13 02:25 PM
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Joined: Jan 2003
Posts: 27,453
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,453
So Cal
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Quote:
... I have had several sets of A body axles done by a shop in SO CA years ago, he made a mandrel that centered on the small axle register with the large 4.5 inch bolt pattern in it and then transferred the pattern to those axles, he would drill and tap them for 1/2 inch by 20 threads screw in studs Those worked good, lasted a long time, same thing on the brake drums, same pattern
Mine were done at the same place 20 years and 80K hard hard miles ago.
I paid Mazzolini for it. But really he just farmed it out to Sutton Engineering I found out years later. Mazzolini didn't do much directly in house. Just put together the right resources.
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Re: i want to redrill my small axles to large bolt pattern
[Re: Rhinodart]
#1521600
10/24/13 09:42 PM
10/24/13 09:42 PM
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Joined: Feb 2005
Posts: 4,311
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,311
Prospect, PA
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Quote:
Quote:
Quote:
Quote:
Quote:
Drilling and tapping using screw in studs leaves very near as much meat around the stud as the OEM original knurled pressed in studs
Quote:
The axles on my sons Dart were drilled to the large pattern and has screw in studs. It was done in 1997 and the axles are still in the car. It has been raced and driven over the years with no problems. Ron
You guys need to quit making sense.
I've done the same thing. Launching off a transbrake and running sub 1.50 60's.
Run stud centric wheels.
Both my failures were on the street turning quick corners, not nearly the same loads on drag cars... 
I've done all kind of autocrossing and high speed track days with mine. Driven 1600 miles in 40 hours and overloaded car to 5600 lbs once. Lots of other long trips.
Been off track a few times at high speed. Bent front steel rim once and twice had to have my rear tires dismounted and remounted to remove the chunks of earth wedged between the tire and rim bead.
The corners are long enough and fast enough that the rear end will puke diff oil out the little factory breather.
Going directly sideways against the axle over desert terrain at 70mph or so... 
http://m.youtube.com/watch?v=XJW-YvipFYE...mp;ved=0CA0QqwQ
But nowdays I would have just got real BBP axles. Makes life easier for brakes.
My failures were long before screw-in studs were available, so I cannot comment on how good they are. 
Grade 8 socket cap screws. Been around forever.
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Re: i want to redrill my small axles to large bolt pattern
[Re: BSB67]
#1521601
10/24/13 10:26 PM
10/24/13 10:26 PM
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Joined: Jan 2003
Posts: 11,707
Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,707
Portage,michigan
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I did this years ago and just had Moser do it. Wasn't much money and zero issues.
If you are in Cincy they aren't a terribly long way away.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: i want to redrill my small axles to large bolt pattern
[Re: RobX4406]
#1521602
10/24/13 10:30 PM
10/24/13 10:30 PM
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Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Moser told me to hook my tape over the flange & if I have 28" or more before it starts to neck down then it is a suitable condidate to get shortened to A body specs
live every 24 hour block of time like it's your last day on earth
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Re: i want to redrill my small axles to large bolt pattern
[Re: BSB67]
#1521603
10/25/13 12:58 AM
10/25/13 12:58 AM
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Joined: Jan 2003
Posts: 27,453
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,453
So Cal
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Quote:
Quote:
Quote:
Quote:
Quote:
Quote:
Drilling and tapping using screw in studs leaves very near as much meat around the stud as the OEM original knurled pressed in studs
Quote:
The axles on my sons Dart were drilled to the large pattern and has screw in studs. It was done in 1997 and the axles are still in the car. It has been raced and driven over the years with no problems. Ron
You guys need to quit making sense.
I've done the same thing. Launching off a transbrake and running sub 1.50 60's.
Run stud centric wheels.
Both my failures were on the street turning quick corners, not nearly the same loads on drag cars...
I've done all kind of autocrossing and high speed track days with mine. Driven 1600 miles in 40 hours and overloaded car to 5600 lbs once. Lots of other long trips.
Been off track a few times at high speed. Bent front steel rim once and twice had to have my rear tires dismounted and remounted to remove the chunks of earth wedged between the tire and rim bead.
The corners are long enough and fast enough that the rear end will puke diff oil out the little factory breather.
Going directly sideways against the axle over desert terrain at 70mph or so...
http://m.youtube.com/watch?v=XJW-YvipFYE...mp;ved=0CA0QqwQ
But nowdays I would have just got real BBP axles. Makes life easier for brakes.
My failures were long before screw-in studs were available, so I cannot comment on how good they are.
Grade 8 socket cap screws. Been around forever.
Yep, that's what mine are. Just grade 8 socket cap screws.
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Re: i want to redrill my small axles to large bolt pattern
[Re: autoxcuda]
#1521604
10/25/13 01:12 AM
10/25/13 01:12 AM
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Joined: Feb 2003
Posts: 8,020
Pangaea
B5 Bee
master
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master
Joined: Feb 2003
Posts: 8,020
Pangaea
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30plus years ago we re-drilled them. Back then, an aftermarket set of axles was $300, almost the same as what they can be bought for today.
We used a lathe to scribe a 4.5" circle on the flange, then drilled and tapped 1/2"X20 holes every 72*.
With the price of axles today, there's no way I'd bother re-drilling. Just the advantage of brake choice is worth the price of the axles. Why stick with expensive, hard to find 10"X1.75" brakes when you can upgrade to cheap and plentiful 10"X2", or larger, brakes.
Do yourself a favor and call Dr Diff.
Last edited by B5 Bee; 10/25/13 01:14 AM.
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Re: i want to redrill my small axles to large bolt pattern
[Re: B5 Bee]
#2747815
02/29/20 05:38 PM
02/29/20 05:38 PM
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Joined: Mar 2003
Posts: 4,848
Memphis
HemiRick
master
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master
Joined: Mar 2003
Posts: 4,848
Memphis
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Just got the axles back from Moser today w screw in studs installed it was $90 to do the pair. They look great, can't hardly tell where the old holes where and they obviously put em in a lathe and trued both sides of the flange. Very happy w their work.
Last edited by HemiRick; 02/29/20 05:39 PM.
Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
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Actully you will twist the left side axle splines off and break the axle first before the screw in studs give you any problems, trust me on that 
