Axle Wrap ?s
Hotshot
Joined: Jun 2003
Posts: 12,340
Likes: 4,357
From: SW VA
Here's a pretty scary video:
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I need to build a set of traction bars for my trucks, as my '78 will nearly drive into the ditch when I hammer on it!
******** width="480" height="385"><param name="movie" value="http://www.youtube.com/v/08UIvr6Sotk?fs=1&hl=en_US"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/08UIvr6Sotk?fs=1&hl=en_US" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed>*********>
I need to build a set of traction bars for my trucks, as my '78 will nearly drive into the ditch when I hammer on it!
Elder User
Joined: May 2008
Posts: 574
Likes: 0
From: SW Idaho
Never thought of that but makes total sense. Ill just route both airlines to the rear of truck and air each bag separately to needed psi. I cant imagine those bags take too long to air up. Anyway Ill be very curious to see the differences having the truck leveled makes in reducing vibrations.
Thanks for all the help above.
STM
Thanks for all the help above.
STM
Tuned
Joined: Oct 2006
Posts: 453
Likes: 12
For this discussion it isn't axle wrap that is the problem. Wrong term. The vibration is caused by the misalignment of the drive shaft components which would happen if the rear end drops too much. No different than if you were to put a lift kit on your truck. Shims would be needed to realign the angle of the drive shaft.
Thread Starter
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Senior User
Joined: Dec 2009
Posts: 216
Likes: 0
Thanks again for all the replies. Makes much more sense now. Hopefully Santa comes through for me. Im planning to take a week in February to head south for a few days and get out of this Mi weather.
STM
STM
Super Moderator
Joined: Aug 2008
Posts: 37,375
Likes: 1,860
From: Frederick, MD
Here is a link to my install photo's:
Ford Truck Enthusiasts Forums - senix's Album: air bag install
The tank is under the drivers door, a fitting is right there to access for air.
The compressor I put on the fuel tank braket at the front of the fuel tank.
Ford Truck Enthusiasts Forums - senix's Album: air bag install
The tank is under the drivers door, a fitting is right there to access for air.
The compressor I put on the fuel tank braket at the front of the fuel tank.
Hotshot
Joined: Oct 2003
Posts: 13,011
Likes: 742
From: Here in No. Calif
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Tuned
Joined: Oct 2006
Posts: 453
Likes: 12
Scott
Thread Starter
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Senior User
Joined: Dec 2009
Posts: 216
Likes: 0
No problem Spud, Im going to install them myself. My rv dealer wanted 3hrs of labor at 99/hr. Id rather spend a half day doing it myself and save the coin. Plus you dont even need to drill with my setup just bolts on.
You might want to send Senix a pm. He has the same bags ill be installing and seems to very happy with them he also probably has a better mechanical understanding then I do! I cant wait to have my truck sit level. I hate the way it looks sitting down with my 2200 pin weight. Plus Im betting the handling will be improved having a little more weight back on the front of the truck.
Ill keep you posted.
STM
You might want to send Senix a pm. He has the same bags ill be installing and seems to very happy with them he also probably has a better mechanical understanding then I do! I cant wait to have my truck sit level. I hate the way it looks sitting down with my 2200 pin weight. Plus Im betting the handling will be improved having a little more weight back on the front of the truck.
Ill keep you posted.
STM
Hotshot
Joined: Oct 2002
Posts: 18,488
Likes: 22
From: The Big, Oregon
Everybody has explained this very well but while I was surfing the web a few minutes ago, I found this diagram of axle wrap. Basically, it's when torque / power is applied and the axle begins to "wrap" in the leaves as shown in the diagram:
Hope this helps fz1dave.
Hope this helps fz1dave.
Cross-Country
Joined: Aug 2015
Posts: 60
Likes: 3
Old thread back from the dead
I am having an axle wrap issue with my older F250 when carrying a heavy load on the flatbed or towing. I have helper airbags installed and until I read this old thread I thought the bags might be part of the problem. However, after reading this thread it now sounds like I need to increase the pressure in the bags to correct the at-rest pinion angle. In other words sagging too much is putting the rear driveline in a position that will make it more likely to push the pinion snout upwards. Frankly, that doesn't sound quite right to me. Anyone wanna tell me why I am wrong?
I am currently running about 40 psi when loaded up.
I am currently running about 40 psi when loaded up.
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,348
Likes: 5,941
From: Lake Hartwell, GA
Can you give us a bit more information on your "older F250"?
Year?
Engine?
Differential gear ratio?
Major modifications that increase HP ot TQ?
Lift kit or no?
Tire size?
Etc...
I have a 2000 7.3L ZF6 F250 with a Borg Warner SXE turbo. Since I tow 12,000 lbs cross country and was experiencing axle wrap I installed traction bars from OUO. I do have air bags as well, but they were not 100 necessary.
No more axle wrap or loss of torque to the ground.
My install of the traction bars is linked below in case you have a similar truck.
https://www.youtube.com/watch?v=o9N9hlhRMGw
Year?
Engine?
Differential gear ratio?
Major modifications that increase HP ot TQ?
Lift kit or no?
Tire size?
Etc...
I have a 2000 7.3L ZF6 F250 with a Borg Warner SXE turbo. Since I tow 12,000 lbs cross country and was experiencing axle wrap I installed traction bars from OUO. I do have air bags as well, but they were not 100 necessary.
No more axle wrap or loss of torque to the ground.
My install of the traction bars is linked below in case you have a similar truck.
https://www.youtube.com/watch?v=o9N9hlhRMGw
Cross-Country
Joined: Aug 2015
Posts: 60
Likes: 3
Truck is a 1986 f250 4x4, 460, t19 w/ granny, 4.something gears i assume, stock other than helper airbags on rear axle.
Looking for a cheap and quick solution. If increasing the pressure in the bags will work, great. Also thinking about putting a cutdown mainleaf above the current mainleaf. Read somewhere on the web that this helps wrap. Not really interested in traction bars at the moment as I just haven't got the time at the moment to do the fabwork and can't justify the price of a bolt on kit.
Looking for a cheap and quick solution. If increasing the pressure in the bags will work, great. Also thinking about putting a cutdown mainleaf above the current mainleaf. Read somewhere on the web that this helps wrap. Not really interested in traction bars at the moment as I just haven't got the time at the moment to do the fabwork and can't justify the price of a bolt on kit.