Caster over front pinion angle or front pinion angle over caster
- Thread starter EROCK
- Start date
Based on the latest pics, are we trying to set him up for a DC driveshaft? It looks like he has a stock 2 u-joint ds.
Yes. We are setting it up with a DC shaft. So far I've gathered it's a 4in lift with a 1inch drop TC. I'm getting 7.5 degree out of the TC, 18.5 degrees off the Drive shaft and 6.5 degrees off the Rear diff(1 degree lower than the TC). It is now vibrating the drivetrain under acceleration. Is this the correct geometry?
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Read your question quoted in post #60 again, it was a yes-no answer question that I replied 'no' to.
So your statement was correct that my rear diff should be just 1 degree lower than the angle of the "drive shaft" not the TC? Beause right now it's like 12 degrees less than the drive shaft angle of 18.5 degrees. I'm afraid I may be using the wrong terminology so I made a pic below of my rear end as it is right now.
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DC is an abbreviation of double cardan, also called a CV shaft, which should be in your future if you keep similar lift height. The stock driveshaft is a single cardan. For a single cardan, the ideal is matched u joint operating angles of no more than 3 degrees. That's not possible in this configuration. Raise the pinion to match the TC output, and use that as a baseline. The original pinon angle was a degree higher than the TC. You didn't mention vibrations at that setting, so logic would suggest returning to the same.
A couple of things to avoid while waiting on an SYE and DC/CV driveshaft; high rpm, and major droop under power. Droop is an output shaft slip yoke killer. Recommended reading assignment, https://*****************/forum/f9/what-cv-shaft-why-do-i-want-one-854790/ Well then, since that link is sabotaged, read this instead, https://wranglertjforum.com/threads/what-is-a-sye-cv-driveshaft-and-why-do-i-want-one.2701/
A couple of things to avoid while waiting on an SYE and DC/CV driveshaft; high rpm, and major droop under power. Droop is an output shaft slip yoke killer. Recommended reading assignment, https://*****************/forum/f9/what-cv-shaft-why-do-i-want-one-854790/ Well then, since that link is sabotaged, read this instead, https://wranglertjforum.com/threads/what-is-a-sye-cv-driveshaft-and-why-do-i-want-one.2701/
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Thank you. You know I actually read that thread a few days ago. It is very clear. I don't know why I called the stock shaft DC. I just forgot I guess. I referred to DC shaft earlier in this post with it's correct definition. Guess Ive been burning the candle at both ends here lately. Haha my mistake. Yes I'll have to find a place that can do the SYE. I watched a video of one getting put in and well. I'm not sure if that's for me. Anyone know of a great Jeep place near Hot Springs AR that's open for buisness?
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