Busted dually 70, '04 11.5" aam swap

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Busted dually 70, '04 11.5" aam swap

Postby liftarc » Fri Jun 29, 2018 8:57 pm

Long story short, my drw d70 rear is toast and I have a srw d70 at the house so I'm wondering...

Can I put the drw drums and hubs on the srw housing with the srw axles and run it temporarily while I rebuild the drw's diff?

I know the wheel bearings are the same and the hub seals are the same but its the width that's different. Is the difference in the housings or the hubs? Will the axle shafts engage the diff with my cobbled idea of a band aid?

I don't have good srw tires and need the drw hubs to run my coined dually rims. I wouldn't do this if I had another option but I REALLY need this truck back on the road ASAP. I don't care about track width its a flatbed and I just need my damn truck 2 weeks ago...

Thanks guys!
Last edited by liftarc on Mon Jul 09, 2018 5:46 am, edited 1 time in total.
92 D350 club cab flatbed dually-201k G360, NP205,D60 swap soon
92 Ramcharger 5.9 Magnum, 46rh, NP241-238k
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Re: Busted dually 70, need a quick and dirty fix

Postby thrashingcows » Sat Jun 30, 2018 12:46 pm

I do not know for sure on any of this but being that the axle width is different between a SRW and DRW axle, and the drums and hubs are bigger/longer?? on a DRW compared to SRW I think you might have issues with the axle splines engaging enough.

But if the hubs are basically the same depth/length as the SRW then I would say yes swap the backing plates, drums from the DRW onto the SRW axle and then slide the SRW axles in place. The only other problem you might run into is clearance between the dually rims/tires hitting the spring packs.
1984/93 Dodge Crewcab, W350, 1 Ton SRW, long box, 330K Km's, M&H spacer, 366 spring, fuel pin to deep side, 14cm housing, Piston LP, PS IC, Isspro Boost, Pyro and tach, NV4500, 29 spline NP205, 3.54's.


Check out the build....http://www.dieseltruckresource.com/dev/ ... 05923.html
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Re: Busted dually 70, need a quick and dirty fix

Postby liftarc » Sat Jun 30, 2018 4:27 pm

Backing plates I would think are the same, but I'll know soon enough. Also I'm sure there's room for the tires to go inboard a good bit. I've got a 4hr drive home then some digging to get to the srw... we'll see where I run out of steam tonight....
92 D350 club cab flatbed dually-201k G360, NP205,D60 swap soon
92 Ramcharger 5.9 Magnum, 46rh, NP241-238k
liftarc
fuel screw!!!!
 
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Re: Busted dually 70, need a quick and dirty fix

Postby Philip » Sun Jul 01, 2018 5:53 am

Backing plates are different. The dually backing plates are offset towards the center section more. The dually axle is 8" wider than the SRW axle. The SRW axle will bolt in. You won't be able to use the duals. Use SRW rims. The inner dual will hit the springs long before it hits the hub surface.
93 W350 Club/cab w/duals, buckets & console, B&W flatbed, G56, 6 spd, 3:07 rears, gages, HX40/16, 4" exhaust, 6X.018 sticks, rear air ride suspension
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Re: Busted dually 70, need a quick and dirty fix

Postby liftarc » Mon Jul 02, 2018 4:56 am

Yeah I measured the drw as 7.5" wider at wms width, roughly equally longer at backing plate flanges. So much for that one.....
92 D350 club cab flatbed dually-201k G360, NP205,D60 swap soon
92 Ramcharger 5.9 Magnum, 46rh, NP241-238k
liftarc
fuel screw!!!!
 
Posts: 96
Joined: Thu Mar 03, 2016 1:28 pm
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Re: Busted dually 70, need a quick and dirty fix

Postby liftarc » Fri Jul 06, 2018 5:23 am

Can anyone vouch for Motive Gear ring and pinion sets? I'm looking at part no D70-354 from Summit for $230.

I have read mixed reviews of MG mostly the negatives seem to be Chevy guys saying the gears dont break in right and hum loudly about 1/3 of the time and MG always seems to blame the customer and won't warranty their parts. I have read plenty of good reviews that say their gear set works fine and the customer is happy.

Just thought I'd ask around. Other parts recommendations appreciated too including install kit.
92 D350 club cab flatbed dually-201k G360, NP205,D60 swap soon
92 Ramcharger 5.9 Magnum, 46rh, NP241-238k
liftarc
fuel screw!!!!
 
Posts: 96
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Re: Busted dually 70, need a quick and dirty fix

Postby liftarc » Fri Jul 06, 2018 1:25 pm

I'm also looking at getting an 04 dually rear axle to retrofit into my truck. Besides moving perches and shock mounts is there anything else to consider with this swap? For the price this seems my best option so far so I'd really like to make it work
92 D350 club cab flatbed dually-201k G360, NP205,D60 swap soon
92 Ramcharger 5.9 Magnum, 46rh, NP241-238k
liftarc
fuel screw!!!!
 
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Location: State of Jefferson
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Re: Busted dually 70, need a quick and dirty fix

Postby Philip » Sat Jul 07, 2018 4:45 am

The only aftermarket gear I have used have been Yukon gears. I haven't had any problems with them.

Dana's are not a good axle for a beginner to learn on. They are one of the hardests to setup properly.
93 W350 Club/cab w/duals, buckets & console, B&W flatbed, G56, 6 spd, 3:07 rears, gages, HX40/16, 4" exhaust, 6X.018 sticks, rear air ride suspension
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Re: Busted dually 70, need a quick and dirty fix

Postby liftarc » Mon Jul 09, 2018 5:41 am

For better or for worse I got the 04 aam dually axle. Whole rear end with brakes cables hoses and driveshaft for $750. I plan to weld on 2.5" spring perches inboard of the original 3" ones which will of course be cut off. I'd like to have run the 3" springs too but they were sold already and would add too much fab work. Driveshaft looks like it may work by just shortening the front section and having the appropriate yoke installed to match the back of the t case. Looking for a set of 03+ 17" dually rims. Hope to also find a late model d60 front and go to a driver side drop so front wheels will match and it will already be set up for radius arms.
92 D350 club cab flatbed dually-201k G360, NP205,D60 swap soon
92 Ramcharger 5.9 Magnum, 46rh, NP241-238k
liftarc
fuel screw!!!!
 
Posts: 96
Joined: Thu Mar 03, 2016 1:28 pm
Location: State of Jefferson
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Re: Busted dually 70, '04 11.5" aam swap

Postby liftarc » Wed Jul 11, 2018 5:48 pm

I ordered stock steel 17" wheels today, and scored some carbon 3/8" plate from the ironworkers at the jobsite for spring perches. I'll need a bit more but its a start. I had considered using stainless plate since thats what I normally work with. I have drops from 1/4" to 1/2" to choose from and plenty of 309 wire but using carbon and 70-s wire will be less prone to crack.

Also been thinking that I'd save money keeping my passenger drop 205 and kingpin 60. To run the 3rd/4th gen 17's I would just need to swap out for 9/16" studs of sufficient length and correct shank right? Anyone have a part number for those?
92 D350 club cab flatbed dually-201k G360, NP205,D60 swap soon
92 Ramcharger 5.9 Magnum, 46rh, NP241-238k
liftarc
fuel screw!!!!
 
Posts: 96
Joined: Thu Mar 03, 2016 1:28 pm
Location: State of Jefferson
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Re: Busted dually 70, '04 11.5" aam swap

Postby liftarc » Tue Jul 31, 2018 7:44 pm

This last weekend I managed to measure existing angles, and get some demo work done.

Stock aam showed 5.8deg up at the pinion with the perches leveled, that is drivers angled up .2deg and pass angled down .2deg as there was .4deg difference there.

With my truck frame leveled both lengthwise and width ways best I could manage my t case yoke shows 5deg down. Im going to shoot for 5.5-6.5degrees up at the pinion with perches as close to each other as possible. I'm still trying to learn how to set up a 2 piece driveshaft so I'm open to advice here.

Perches and shock mounts are cut off the aam, its cleaned up and painted. Old d70 is off in the dirt, helluva boat anchor.....

I ordered perches, spring plates and u bolts from Barnes4wd.com last week. Tires are on order this week. Still looking into shocks but I'll probably weld the lower mounts right on the tubes and run my stock '92 shocks since they aren't very old.

The hub bores of the coined 92 rims measure the same within a couple thou as the 03+ 17inchers. I'd really like to run the 17s on my kingpin 60 and upgrade the front calipers at least, possibly discs also.

Well, that's my update, I know you guys were dying to hear something...... :roll:
92 D350 club cab flatbed dually-201k G360, NP205,D60 swap soon
92 Ramcharger 5.9 Magnum, 46rh, NP241-238k
liftarc
fuel screw!!!!
 
Posts: 96
Joined: Thu Mar 03, 2016 1:28 pm
Location: State of Jefferson
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