80 axle with centered t-case output? (8 Viewers)
- Thread starter 1974FJ
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Hmmm...
Do you have some other t-case in there with a centered out and are wondering if you can run the 80 rear? IIRC the 80 rear is 5 inches off center. I've been told that it would be okay from Jeremiah at Proffitt's but a driveline guy told me don't do it. I know that isn't any help but that is as far as I got on the same question. If you were going to stretch the wheelbase a bit I would think it would be okay.
Kyon
Do you have some other t-case in there with a centered out and are wondering if you can run the 80 rear? IIRC the 80 rear is 5 inches off center. I've been told that it would be okay from Jeremiah at Proffitt's but a driveline guy told me don't do it. I know that isn't any help but that is as far as I got on the same question. If you were going to stretch the wheelbase a bit I would think it would be okay.
Kyon
Trail or DD? DD, might not work so well....trail, should be fine strength wise.
My friend runs a 80 series rear axle on his 4Runner buggy with a centered transfer case with zero driveline issues and the small offset.
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Sounds very similar to what I was originally planning for my 40 until I got the 80. I was going to run an NV4500 with a Klune to a split t-case with 80 axles front and rear. Anyways, the thing I don't quite know/understand is what the compound angles would do to the drive shaft. Seems to me that it would be okay. The drive shaft is designed to flex in any direction... I have been trying to picture the movement in my mind's eye and I think I can see it. Imagine one end of the shaft stationary the other end of the shaft is rigged to make a 3' circle around the stationary end. Now spin the shaft and put the circle end in motion. I think it would do it no problem. Not sure if that is a good example but I have to "see" things to understand them.
Alk, not sure I get the logic. Seems to me that on the road you would be facing a much more static environment. i.e. the compound angles would be much less in play, albeit at a much faster driveshaft rotation. On the trail, you would see the angles changing all over the place. Slower rotation speed, yes, but angles would be changing quick.
I still think the drive shaft would be okay...
- Thread starter
- #7
Mostly a DD.
Difference here is the length in drive shafts. His 4runner, i would imagine, would have a longer rear drive shaft to decrease the offset over a given amount of space. And i guess not knowing what the length will be from my t-case output flange to the rear axle flange makes this a dumb question. Just looking for ideas so i can start getting parts together.
I would plan or running a double cardon shaft. Stretching to 110" will help too. Gives a great departure angle
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there is always the Hybrid Centered Cruiser Diff Option.. if you use Tacoma Shafts your Width would be about 60"..
My Driveshaft is 24" long in my cruiser, and the t-case is offset by about 2.5" from the Diff FLange, i have no driveline vibrations with a Toy CV Shaft from an IFS Minitruck
My Driveshaft is 24" long in my cruiser, and the t-case is offset by about 2.5" from the Diff FLange, i have no driveline vibrations with a Toy CV Shaft from an IFS Minitruck
you will need to run u-joints on both end of the shaft and you will not be able to rotate your pinion up. U-joint angles on either end of the shaft need to be = within 2-3 deg to not get vibs. As long as the flanges are in parallel plains and you don't exceed the u-joints operation angle you'll be okay.
It would be structurally sound, as in it's not going to grenade from being spun, but it could probably cause terrible vibrations that could cause things to come loose.
This is how I've always understood things:
(u-joints on both ends of the shaft mean no C.V.s, just a plain old U-joint)
My Scout came factory equipped with Dana 18(offset transfer like a cruiser), and centered rear diff(Dana 27-yikes!). Granted the driveshaft was quite a bit longer than a cruiser's, but it worked just fine.
Never really looked right though!
(u-joints on both ends of the shaft mean no C.V.s, just a plain old U-joint)
My Scout came factory equipped with Dana 18(offset transfer like a cruiser), and centered rear diff(Dana 27-yikes!). Granted the driveshaft was quite a bit longer than a cruiser's, but it worked just fine.
Never really looked right though!
Eskimo
SILVER Star
My rear diff is offset and it drives fine on the street, up to about 55 is the highest I've had it, but with my gearing, that's about 75 in a rig with 4.11's and a 35" tire.
IPOR
IronPigOffroad.com
Ditto. You won't be able to run a double cardan joint, or rotate the pinion, but provided you stay within the operating range of the u-joint it doesn't care whether you're down... or out!
Lance
Iron Pig Off Road : Toyota 4WD experts
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Wouldn't the gas tank on an 80 series interfere with a centered output?
- Thread starter
- #17
Its not going on a 80, Its going under my 74 fj40.
Whats the width of a toyota mini rear axle(V6)?
And whats the width of a fj40 rear axle? and the width of a fj80 rear axle?
Any more info on this? Are you running one, have you seen one, build threads?
