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Old 09-21-2015, 02:17 PM
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Old 03-26-2017, 05:26 AM
  #27751  
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On a 3-joint drive shaft, double cardon is the pivot joint for suspension travel and must be at fixed end of drivetrain (transfer case) to function properly.
Old 03-27-2017, 01:26 PM
  #27752  
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Originally Posted by NewKindOfClown
Is there a reason why the double cardan joint needs to be on the transfer case side? In theory, could it be attached to the axle's pinion yoke with a standard u-joint at the TC output? Assume all angles are correct in both scenarios and oiling the pinion is not an issue.
The double cardan needs to be where the angle is, and the single u-joints needs to be where there is no angle. If you could somehow swap the angles then it would work. In practical applications it's unlikely.
Old 03-27-2017, 03:13 PM
  #27753  
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Originally Posted by McCaffrey
The double cardan needs to be where the angle is, and the single u-joints needs to be where there is no angle. If you could somehow swap the angles then it would work.
That doesn't make sense geometrically. Both sides are at angles relative to each other; nothing can be at "no angle" when you're comparing things.

If a setup were configured in that manner, the single ujoint would attach to the TC yoke with the driveshaft following the same angle of the TC output. The DC joint would attach to the axle pinion, which would be pointing higher than before, at whatever angle it needs to be in order to make the driveshaft's angle 0° relative to the TC output yoke.

That's why I said to assume the angles are adjusted correctly and the pinion is lubricated. I don't see a reason why it shouldn't work in that manner in theory, at least at low RPM on a bench, but I don't know if it would be an issue in a functional application.
Old 03-27-2017, 04:12 PM
  #27754  
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...
Old 03-27-2017, 05:17 PM
  #27755  
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Originally Posted by NewKindOfClown
That doesn't make sense geometrically. Both sides are at angles relative to each other; nothing can be at "no angle" when you're comparing things.

If a setup were configured in that manner, the single ujoint would attach to the TC yoke with the driveshaft following the same angle of the TC output. The DC joint would attach to the axle pinion, which would be pointing higher than before, at whatever angle it needs to be in order to make the driveshaft's angle 0° relative to the TC output yoke.

That's why I said to assume the angles are adjusted correctly and the pinion is lubricated. I don't see a reason why it shouldn't work in that manner in theory, at least at low RPM on a bench, but I don't know if it would be an issue in a functional application.
Think about what you're saying. The entire engine, transmission, and transfer case would have to be parallel to the driveshaft in order for that to work. Which means like a 12" transfer case drop, or the nose of the engine sticking up through the hood lol
Old 03-27-2017, 05:40 PM
  #27756  
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Originally Posted by salad
Think about what you're saying. The entire engine, transmission, and transfer case would have to be parallel to the driveshaft in order for that to work. Which means like a 12" transfer case drop, or the nose of the engine sticking up through the hood lol
Maybe this is his Jeep? Fits your description...

Old 03-27-2017, 05:51 PM
  #27757  
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Ok...

Wheels:
https://www.quadratec.com/products/92601_4XX_B_PG.htm

Tires:
http://www.4wheelparts.com/Tires/Goo...iews_Container

First question, will these tires fit on this wheel? and is the backspacing on those wheels enough for a 3 inch lift? I am new to this if you can't tell...
Old 03-27-2017, 05:59 PM
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Originally Posted by nardey11
Ok...

Wheels:
https://www.quadratec.com/products/92601_4XX_B_PG.htm

Tires:
http://www.4wheelparts.com/Tires/Goo...iews_Container

First question, will these tires fit on this wheel? and is the backspacing on those wheels enough for a 3 inch lift? I am new to this if you can't tell...
15" tires will fit on 15" rims.

No other information is listed at the Quadratec link. See the details of the model here: http://www.cragarwheel.com/wheels/wh...ies-397-soft-8

8" wide with 4.5" backspacing (or thereabouts) is plenty if you don't intend on upgrading in tire size.
Old 03-27-2017, 06:01 PM
  #27759  
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Originally Posted by salad
15" tires will fit on 15" rims.

No other information is listed at the Quadratec link. See the details of the model here: http://www.cragarwheel.com/wheels/wh...ies-397-soft-8

8" wide with 4.5" backspacing (or thereabouts) is plenty if you don't intend on upgrading in tire size.
Now why would I do 8 inch wide and not 7?
Old 03-27-2017, 07:04 PM
  #27760  
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Originally Posted by nardey11
Now why would I do 8 inch wide and not 7?
Moves the tire bulge further out from the control arms with the same backspacing, preventing rub
Old 03-27-2017, 09:11 PM
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Originally Posted by salad
Think about what you're saying. The entire engine, transmission, and transfer case would have to be parallel to the driveshaft in order for that to work. Which means like a 12" transfer case drop, or the nose of the engine sticking up through the hood lol
Paint to the rescue! What's the problem with the bottom image? Purely as a hypothetical setup, I mean.

All Lift & Tire questions go here!!!-20170327_220931.jpg
Old 03-27-2017, 09:15 PM
  #27762  
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Originally Posted by NewKindOfClown
Paint to the rescue! What's the problem with the bottom image? Purely as a hypothetical setup, I mean.
Nothing, if your Jeep is slammed. With that little of an operating angle why wouldn't you run a traditional properly-phased single-cardan shaft?
Old 03-27-2017, 09:57 PM
  #27763  
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Originally Posted by salad
Nothing, if your Jeep is slammed. With that little of an operating angle why wouldn't you run a traditional properly-phased single-cardan shaft?
I'm not saying I intend to. I was only curious if there was some reason why it wouldn't work
Old 03-28-2017, 05:12 AM
  #27764  
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Originally Posted by fivendime
OK lets see if I can do it. hahaha

Warrior Products Front Rock Crawler Bumper with Brush Guard, and D-rings
Warrior Products Rear bumper with D-rings
Warrior Products Safari Rack
" Diamond Plate Body Armor
" Steering Box Brace
" Safari Rack Air dam
" Rock Barz
" 3" Suspension Lift Kit
" Leaf Spring Shackle Kit
" Auxiliary Light Tab Brackets
" High Lift Jack Brackets
" Spare Tire Bracket
Warrior Products Link: http://www.warriorproducts.com/catalog.html

Husky Liners Front seats, Second seats, Rear cargo Grey Liners
Husky Liners Link: http://www.huskyliners.com/searchresults.cfm

KC 57 Series All Season Light Kit, 5x7 black plastic system #735 Link:http://www.kchilites.com/store/5x7-B...735-P7C25.aspx

Airaid Intake
Airaid Link: http://www.airaid.com/ProductDetail....ductID=310-136


WP products review: PM me if you have a question on one of them, but for the most part all there products are good quality. There suspension kit has very good manners on the street, an off road test in the near future. I also have pucks in the front which I have no idea who there from. I did not install these items but have checked them out and other then the lift and Rock Barz they seem to be simple. You will need a drill and rivet gun for the body armor. 2 people would help with the Rock Barz but a jack stand can be the other hand.

Husky Liners review: I LOVE THESE THINGS. Just drop them in, they fit perfectly.

KC HiLites review: Dont let the price scare you. They are the best lights I have ever owned or viewed. High quality product. Very good light, with optional lenses. I have used them in the fog and they work awesome! Also work very well for driving lights. Spot on instructions. Took me about 3-4hours to install, but you cant see a wire anywhere. Fairly simple just time consuming.

Airaid Review: Came with the rig, not too loud at idle while out of XJ. Not loud under acceleration. Very good fitment. I'm sure there is a power and mileage gain. Kinda pricey. Very easy install.

WHEW! This may be edited at any time.

Nice information.. Thanks for sharing.
Old 03-28-2017, 07:26 AM
  #27765  
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Originally Posted by NewKindOfClown
Paint to the rescue! What's the problem with the bottom image? Purely as a hypothetical setup, I mean.

Attachment 300154
Originally Posted by salad
Nothing, if your Jeep is slammed. With that little of an operating angle why wouldn't you run a traditional properly-phased single-cardan shaft?
Originally Posted by NewKindOfClown
I'm not saying I intend to. I was only curious if there was some reason why it wouldn't work
In purely hypothetical terms, I don't see why it wouldn't, however based on this tidbit of information:



from this article:

http://www.pirate4x4.com/tech/billav...ft/index2.html

It would seem to me that you'd NEVER have any vibes during axle wrap, but every time you hit a bump at cruising speed, your u-joint angles would go out of phase and you'd experience driveline vibes.

Does that tickle your funny bone?

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