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Opinions on offset rear axle for SAS #758983
10/18/06 01:58 PM
10/18/06 01:58 PM
Starchild  Offline OP
Rock Warrior
Joined: Feb 2004
Posts: 965
Fernandina Beach, FL
There is a set of axles advertiesd locally from a J-20. I'm waiting to hear back from the seller, but I thought it might be a good candidate for a future SAS. According to my research, it should be a 3/4 ton, with a D44 front, D60 rear. I don't know the year, but it looks like if the front is Passenger drop, then the rear will be a SF D60 with about a 6" offset to the passenger side. I've seen comments that if you're not swapping it into a jeep with a short rear drive shaft, then the offset rear is workable.

If the price is right, I might consider these, but I just wanted to get some opinions of the offset rear in my Passport. I've got a pretty long rear shaft with my shorter drivetrain.

Thoughts?

<img src="/forums/images/graemlins/cheers.gif" alt="" />Andre


"SERENITY NOW!"

1995 Passport - TH700R4 - Twin-sticked Dana300 w/tera 4:1 - Leaf sprung SAS w/Dana 60/14BFF - 38.5x11 Boggers - DOR bumper w/ MM SE9500
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Re: Opinions on offset rear axle for SAS [Re: Starchild] #758984
10/18/06 02:08 PM
10/18/06 02:08 PM
RobG  Offline
Roll Me Over
Joined: Sep 2000
Posts: 4,277
Winston-Salem, NC, USA
IMO, don't bother. you don't want to deal with a quadratec axle if you don't have to. I don't see you running the offset diff in your Isuzu as is, especially if you plan on keeping highway driving. its significantly offset, without a tcase swap/relocation, this will cause driveline geometry issues big time. yes, you can retube them to center the diff, but again, a lot more work than you want when rear axle choices are so plentiful.

and btw, some J20's come with D60 FF (not SF) too. Though, I've heard this is a light duty version and the tube thickness isn't what you'd find compared to the same axle out of a big van/truck.


-Rob

Re: Opinions on offset rear axle for SAS [Re: RobG] #758985
10/18/06 02:26 PM
10/18/06 02:26 PM
Starchild  Offline OP
Rock Warrior
Joined: Feb 2004
Posts: 965
Fernandina Beach, FL
Thanks Rob. That's pretty much what I figured.

Quote
and btw, some J20's come with D60 FF (not SF) too. Though, I've heard this is a light duty version and the tube thickness isn't what you'd find compared to the same axle out of a big van/truck.


As far as I can tell, they switched to the FF D60 after '75, when they also switched to a drivers side drop.

If the guy is willing, I might just take the front axle, which I understand is pretty standard D44 stuff.

Thanks,
<img src="/forums/images/graemlins/cheers.gif" alt="" />Andre


"SERENITY NOW!"

1995 Passport - TH700R4 - Twin-sticked Dana300 w/tera 4:1 - Leaf sprung SAS w/Dana 60/14BFF - 38.5x11 Boggers - DOR bumper w/ MM SE9500
Re: Opinions on offset rear axle for SAS [Re: Starchild] #758986
10/18/06 03:02 PM
10/18/06 03:02 PM
RobG  Offline
Roll Me Over
Joined: Sep 2000
Posts: 4,277
Winston-Salem, NC, USA
yea, the front axle is good. the heavier J-trucks even came with 8-lug D44's and some had flat top knuckles. The width is around 65" iirc, so its a little wider than your typically waggy D44 that is more common.

-Rob

Re: Opinions on offset rear axle for SAS [Re: RobG] #758987
10/18/06 07:58 PM
10/18/06 07:58 PM
Smiley  Offline
Trail Leader
Joined: Dec 2001
Posts: 5,911
Back in BFE, WV
I went down this road a little while back, when a friend was parting out an old J-20...

Rob got me to see the light about how much of a PITA it would be to try to use that offset D-60
(Thanks Rob! <img src="/forums/images/graemlins/kewl.gif" alt="" /> )


Anyway, I got a passenger-side-drop, full-width, 3/4 ton, 8 lug Dana 44 out of the deal - although, IIRC, I'm pretty sure that it measures 67".


<img src="/forums/images/graemlins/cheers.gif" alt="" />
<img src="/forums/images/graemlins/smile.gif" alt="" />


Six Isuzus, so far... still have three of them.
Re: Opinions on offset rear axle for SAS [Re: Smiley] #758988
10/18/06 08:32 PM
10/18/06 08:32 PM
Starchild  Offline OP
Rock Warrior
Joined: Feb 2004
Posts: 965
Fernandina Beach, FL
Quote
Anyway, I got a passenger-side-drop, full-width, 3/4 ton, 8 lug Dana 44 out of the deal - although, IIRC, I'm pretty sure that it measures 67".


My info says 67" as well <img src="/forums/images/graemlins/nana.gif" alt="" />

It's all beside the point in this case. I talked to the guy today, and it's a centered diff, D60FF, BUT, the front is drivers drop <img src="/forums/images/graemlins/frown.gif" alt="" />

The search continues...

<img src="/forums/images/graemlins/cheers.gif" alt="" />Andre


"SERENITY NOW!"

1995 Passport - TH700R4 - Twin-sticked Dana300 w/tera 4:1 - Leaf sprung SAS w/Dana 60/14BFF - 38.5x11 Boggers - DOR bumper w/ MM SE9500
Re: Opinions on offset rear axle for SAS [Re: Starchild] #758989
10/18/06 08:48 PM
10/18/06 08:48 PM
Bigpoppax2  Offline
Roll Me Over
Joined: Apr 2002
Posts: 2,529
Bluefield, Virginia
I just saw some Unimog axles in the trader paper today. You want the number? <img src="/forums/images/graemlins/evil.gif" alt="" />

Joe


A gun in the hand is better than a cop on the phone.

98 Passport 33's, Supercharged, Calmini Bumper, rockbars, diff drops, Teralows, 4.77's, Aussie and ARB lockers, Safari snorkel, Optima red top.

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