Driveshaft Troubles
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Joined: Jul 2006
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From: Trafford
Driveshaft Troubles
hi, ive recently put a 6'' skyjacker suspension lift on my 1979 ford f-250 and everything works ecept for my front driveshaft. When i installed the lift i had the driveshaft extended to fit in the front. I recently got around to putting it on and it clunks and binds up when i use it. Is there anything i can do to the driveshaft to get it stop doing this?
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New User
Joined: Jul 2006
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From: Trafford
I agree with u on the divorced tranfercase, but my truck is a 79 lowboy. I thought the divorced transfercases could only fit in the 73-77 1/2 frames?
And also to to answer "couios gorge" i already have the ballsocket and double u joint set-up on there already.
And also to to answer "couios gorge" i already have the ballsocket and double u joint set-up on there already.
Laughing Gas
Joined: Dec 2007
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From: Alvarado, TX
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Post Fiend
Joined: Jul 2006
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How much have you shimmed the front axle?
I run 1410's and a married case in my shortbed 73 and I do not have this issue.
Expect about 6 degrees of shim to fix the driveline issues.
I run 1410's and a married case in my shortbed 73 and I do not have this issue.
Expect about 6 degrees of shim to fix the driveline issues.
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Postmaster
Joined: Oct 2005
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From: Victoria , BC
not too sure if it is a direct fit but I do know that you can make anything work if you really want it too
Laughing Gas
Joined: Dec 2007
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From: Alvarado, TX
This is a fix for the front but it makes the rear shaft almost 2' shorter. Which end do you use more? I would rather deal with the existing issues than go through all the hassle of a conversion and have to deal with the same thing on the back. My truck has a divorced case and with its height I should put a CV on the rear. It shudders every time I hit the throttle in 2wd. The front, however, has perfect angles. All a divorced case would do is move the same issue from the front of the truck to the rear. Guys lift trucks all the time and make the shafts work properly. It might just take a little trial and error.
Postmaster
Joined: Oct 2005
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From: Victoria , BC
yeah but the rear isnt nearly as bad. Have you seen my truck? I run about 15 inches of lift in total with a divorce tcase and 44's with a 1 ton cv rear driveshaft that is my daily driver to and to and from work and I have no shake issues. Figuring out a 6 inch lift should be a piece of cake! There is a proper way to run your driveline angles when you know what you are doing
Post Fiend
Joined: Jul 2006
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Here you can see the amount of wedge correction required for a lift of this size. Notice the driveshaft angle. This is my other truck and you can see that even with a married t-case and 1410 joints the angles can be kept under control.
This is a steel wedge under the spring.
This is a steel wedge under the spring.
Postmaster
Joined: Oct 2005
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From: Victoria , BC
there is a very good tech article on pirate 4x4 called"1ton cv high angle driveline" by Billa Vista. It goes into detail on ujoint sizes, max operating angles and proper diff tilting for running a cv driveshaft(1.5 degrees down from being parralell in line of shaft to alow for axle to rotate up while underload). Read it(twice if u need to) and you'll understand...
Senior User
Joined: Jan 2006
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From: Bethel,Ohio
I have the same problem on mine. If yours is painted just look and see where it is hitting. I used the superduty spring and mine is just over 7" of lift and the front shaft was 2'' from even bolting to the pinion. I took the cv apart and ground down where it was hitting and added some wedge to the front axle and It fits now. But needs a little more taken out of the cv. From my experence with mine the centering yoke was hitting the cv was the biggest problem. At least yours bolted up. You should have no problem at all with a little grinding on the cv. I had to take a bunch out of mine and still have plenty left. You might also just get away with a little wedge in the front depending on your caster. Check some of my posts. 75F350 has done this several times already and has helped me out a bunch. These guys have already done the ground work for us so that will be less trail and error for us.