View Full Version : My new rear trussed ford 9"- but it's off-center 6"
CameronB
March 13th, 2006, 22:57
...will it work? The pumpkin is offset 6" towards the pass side, from the t-case output. The driveline will be apx 40" when the sye is on. So that's a deflection of 6" over a length of 40". Would this angle be ok on the road? or would it vibe? what about a driveline with 2 cv joints?
I basically got it for nothing; it's trussed (bridged?) on top with square tube, has big bearing ends, has dutchman 31 spline shafts, is 59 or 60" wide, thick wall housing, and I'd really like to use it, if possible. But if I can't, I guess I'd have to sell it.
tia
BrettM
March 14th, 2006, 15:31
you either need 2 CV joints or no CV joints, in other words a 2 joint shaft or a 4 joint shaft. with a 40" driveline you would have to have a very large lift to need an SYE anyway, so just run the stock t-case slipyoke and keep the pinion pointed parallel to the output. My rear driveline (shortbed MJ) was about 42" and with an 8" lift I had zero vibes and put thousands and thousands of street miles on it.
96XJCLASSIC
March 14th, 2006, 16:12
Get a Dana 18 or 20 case. Or sell it to a Sammy owner.
CameronB
March 14th, 2006, 22:29
Brett,
right now, the ds is 36" ujoint to ujoint. It's an '86/231/ax5 with a centered 9" rear, on 6" of lift. I'll have to measure, but I think it'll need a longer driveline to run the other offset 9", due to axle droop. As it is now, I probably should have a longer ds, but I'll have to measure.
If I get it lengthened (or buy a longer ds,) and the pinion angle is set parallel to the output, then it would be almost horizontal, and more subject to damage (rather than if it were pointed up at the tcase.)
I've already had to grind out the ujoint yoke at the tcase to avoid binding under hard braking, so a sye is in order because of that alone. How did you run 8" without this problem? My tcase is dropped now, and I want to raise it back up.
Tom Woods DS said that a ds with 2 cv's would weight 40+ lbs, and I didn't ask the cost. Although, they do make an offset type ujoint that allows more deflection, and I guess they could be run on both ends. They said that this style is more prone to vibes at higher speeds though because of it's design.
96 XJ,
Not familiar with either tcase, but i'll check it out. If I sell it to a sammy guy, what do you think it would be worth? Is the width right? (59ish- no brakes on it right now) The bolt pattern is 5 on 5.5"
BrettM
March 14th, 2006, 22:42
I used a YJ yoke which has more clearance in the ears. I also had the pinion pointed a bit higher than parallel, but not quite at the t-case. I've found that as long as you have new u-joints in the shaft, the angles aren't nearly as picky as people make them out to be.
CameronB
March 14th, 2006, 23:08
So you used a yj yoke off of the rear of a 231, or off of the front? Are they the same?
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