Offset diff to ATLAS?? (4 Viewers)

[chicago]

Been thinking about saving up for an atlas and ive read a number of posts saying that a centered rear output SHOULD work fine w/ an off set diff, but is it a GOOD IDEA to do this?? Or is it better to center a rear axle ??
Is drive shaft length a big factor in how the off set will function??

 

[Cruiserdrew]

Subscribing. I am thinking of temporarily going the other direction, ie off-set output, centered axle.

I feel an Atlas in my future too. Soon.

 

[chicago]

Subscribing. I am thinking of temporarily going the other direction, ie off-set output, centered axle.

I feel an Atlas in my future too. Soon.

Did you finally get that 14 bolt in??
What cases do you have now!?

 

[yOHda]

It will add to your overall ujoint angle, but the ujoint has no idea what angle it is operating at. Im running a offset case with a less offset 80 series rear axle and I have no vibrations up to the 60 mph I can muster.

A few guys in the tacoma world have swapped to 80 series rear axles and run them without issue.

Samurai guys with Toyota axles do it all the time without issue.

I'm pretty sure you have to stick with ujoints though, you cant use a cv.



Good info here: http://www.pirate4x4.com/forum/gene...th-about-center-output-tcase-offset-diff.html

 

[TCinVA]

I had a centered diff with an offset output on my last trail ride. I have a doubler and a really short driveshaft I had to grind and clearance, I was worried about the angle and the yokes holding up but it worked out fine, I even twisted the tube on one hop and was able to camp fix it and keep going the next day.

 

[bsilva132]

I believe wngrog had an atlas to offset diff in one of the early iterations of Kate. Might try sending him a PM.

 

[chicago]

It will add to your overall ujoint angle, but the ujoint has no idea what angle it is operating at. Im running a offset case with a less offset 80 series rear axle and I have no vibrations up to the 60 mph I can muster.

A few guys in the tacoma world have swapped to 80 series rear axles and run them without issue.

Samurai guys with Toyota axles do it all the time without issue.

I'm pretty sure you have to stick with ujoints though, you cant use a cv.

Good info here: http://www.pirate4x4.com/forum/general-4x4-discussion/1348370-truth-about-center-output-tcase-offset-diff.html

Thanks for the link. That actually what I was looking at prior to posting this discussion here.
So did you get DL vibes ABOVE 60 MPH w/ your set up??
For my rig, going to an atlas would solve some "piece of mind" issues I have and increase the overall performance.
Right now I've got a 203-split case set up. It works good, but there are some things that I don't like about it.
I'm, not understanding why a CV wouldn't work vs. a u joint??
DC type shaft should negate the vibes, no??

Thanks for the input, all!!

 

[chicago]

I believe wngrog had an atlas to offset diff in one of the early iterations of Kate. Might try sending him a PM.

Ill shoot him a pm!!
Thanks!

 

[SNLC]

I ran offset t-case and centered rear diff. No issues but I could not muster 60mph. It was a slow beast and I don't think I ever had it above 55mph.

Cheers

 

[Fast Eddy]

I'm, not understanding why a CV wouldn't work vs. a u joint??

Because geometry.

Ideally with a CV in the driveline you want the pinion to point straight at the end of the CV. With the offset, there's no way to do that.

 

[mookie]

i had an atlas to offset rearend for about 6-9 months, it worked ok, looked horrible though. i used a CV mini-truck dshaft about 35" long. i never noticed any vibration or anything. Ironically the very next time i took it out after swapping to a 14B the cv exploded.

 

[Tigerstripe40]

When I pulled the rear end out of my '40to do the soa, I noticed that the T-case and rear axle flange weren't alighned straight to each other. I've never had a DS vibration issue, and it's in the stock configuration. For the SOA, I am planning on rotating the pinion up, and have a CV but after reading fast eddies last comment, I am not so sure about that now...

 

[chicago]

Sounds as if the best thing to do is get everything lined up as it SHOULD be.
Kinda what I figured, but just getting an idea of the experiences.

Thanks for the input gents.

K

 

[Fast Eddy]

My case and rear end are both offset and I have a CV shaft, but the offsets are not exactly the same. I'd have to measure. It's not off by much; maybe 3-4"? I don't have any vibrations up to 75mph.

 

[chicago]

With the idea that it'll just be generally BETTER to do a centered rear, this idea became one for DOWN THE ROAD!!!
W/ the way I built my rig, my fuel tank I built will be SMACK DAB in the way, so a LOT would have to happen for me to make this work.
Fortunately I'm in no hurry for a change!! "

 

[Poser]

You will probably need to look into high pinion rear differentials with an Atlas.

I am spring under on my junk, and I could not make a low pinion diff work with the Atlas, and I have the rear axle moved back 7.5".

35 spline ARB/Hi9, CTM axle shafts and 1350 CV rear shaft from High Angle.

It is only money.

 

[chicago]

You will probably need to look into high pinion rear differentials with an Atlas.

I am spring under on my junk, and I could not make a low pinion diff work with the Atlas, and I have the rear axle moved back 7.5".

35 spline ARB/Hi9, CTM axle shafts and 1350 CV rear shaft from High Angle.

It is only money.

Poser,
Why is that??
What is it that wouldn't work??

 

[Cruiserdrew]

I can guess. It's about the very high output (in line with the crankshaft) to a low pinion = very high operating angles for a driveline. Especially for one as short as yours.

 

[chicago]

I can guess. It's about the very high output (in line with the crankshaft) to a low pinion = very high operating angles for a driveline. Especially for one as short as yours.

Ah. I see.
I would imagine, however, in switching to an atlas I would gain an additional 7in, at least, to the DS.
But, I can see what you're saying.

 

[mookie]

Atlas's are clockable so you could reduce the angle if it doesnt affect your belly height. high pinion in the rear is less than ideal strengthwise so i personally would avoid that at all costs