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  1. Shawn at Tom Wood's

    Is an SYE and DC driveshaft install worth it?

    Everything I've read on here is good advice and input. I agree, the angles don't seem to be the issue here and do not seem to necessitate an SYE and double cardan shaft. You might still benefit from it but perhaps only due to the fact that you'd be replacing a bunch of old things with new...
  2. Shawn at Tom Wood's

    Driveshaft length

    Check this out! How much vertical change affects drive shaft length is a pretty common question, this thread inspired me to create a calculator to help answer this question. It's basically the Pythagorean Theorem I linked previously but this time it is in a hand calculator that is purpose made...
  3. Shawn at Tom Wood's

    Driveshaft length

    The Tummy Tuck will affect the length by maybe an inch. It can be calculated here https://www.calculatorsoup.com/calculators/geometry-plane/pythagorean-theorem.php. Drive shaft length is hypotenuse. I don't know what side a is going to be in your vehicle so I used 8 inches as an educated guess...
  4. Shawn at Tom Wood's

    How much angle is too much angle for the rear driveshaft?

    You know something? You are right! I messed up the math! I calculated the average pinion rotations per mile first by mistake and then re-multiplied that by 4.10. So all of my numbers are 4.1X too large. Still though, the pinion bearing is spinning many times faster and many times more per mile...
  5. Shawn at Tom Wood's

    Time for a 241OR rebuild

    It looks like the boot came loose from its seat which would cause it to get pinched between the yokes. There is a little metal ring on the weld yoke that the little metal ring of the boot is supposed to press onto. There's not a lot of surface contact area between the two things so it is not too...
  6. Shawn at Tom Wood's

    How much angle is too much angle for the rear driveshaft?

    @freedom_in_4low Understood what I was saying. @freeskier93 I'm not saying that it is because people re-gear, I'm saying the pinion bearing is spinning faster than the side bearings in the differential. This is always true, whether you are running 3.23 gears (3.23X as fast) or 5.13 gears (5.13X...
  7. Shawn at Tom Wood's

    How much angle is too much angle for the rear driveshaft?

    Oh man, I wish I knew the diameters of the rollers and the bearing race so I could figure that one out. I just grabbed a pinion bearing, I don't know what it is out of, and marked a roller and marked the starting point on the bearing race. I then rolled it around by hand, rolling the roller with...
  8. Shawn at Tom Wood's

    How much angle is too much angle for the rear driveshaft?

    Wow! This video is great! I didn't know it existed, I need to embed it on our website somewhere. People are always worried about lubrication when they rotate their pinion. At first glance it makes sense to worry. We try to always assure people that the ring gear slings oil all over the place...
  9. Shawn at Tom Wood's

    Alignment issues and vibration after 4 inch lift

    I'm a terrible sales person. I never want to talk someone into spending money with us or spending more money for the sake of getting a (bigger) sale. If I think someone needs something more expensive because I'll tell them but if I think they need something less expensive than they were...
  10. Shawn at Tom Wood's

    Alignment issues and vibration after 4 inch lift

    Jerry is spot on as always with his explanation about the SYE. If you are more of a visual learner you can watch the video and explanation on this page https://4xshaft.com/blogs/general-tech-info-articles/slip-yoke-eliminator-installation-purpose-and-benefits. Regarding the quote above about...
  11. Shawn at Tom Wood's

    Is replacing bad rear driveshaft u-joints urgent?

    I agree. Maybe $40 for the joints is money well spent on the peace of mind that the shaft will be safe for a few more weeks until you get the SYE and CV shaft. That way if 2-3 weeks turns into 3-5 you'll still be okay. Plus you get the added bonus of practicing your u-joint replacement skills, a...
  12. Shawn at Tom Wood's

    SYE and non-cv yoke / driveshaft

    I just have to hurry and reply with answers before you get a chance to answer the question equally well so that i can continue to appear relevant. ;)
  13. Shawn at Tom Wood's

    SYE and non-cv yoke / driveshaft

    Oh, and as @GPK03X mentioned, the shaft you'd need isn't exactly a longer stock TJ rear shaft. It would have to have a slip yoke integrated into the shaft. Basically a shaft like the one we show here https://4xshaft.com/collections/jeep-cj-products/products/cj-rear-shaft-stock-type.
  14. Shawn at Tom Wood's

    SYE and non-cv yoke / driveshaft

    For the most part, the only reason to do a SYE is to facilitate a double cardan shaft. The bonus is that you get a fixed output yoke on the transfer case which I like better as it is a more solid way of attaching things. Another bonus is that you shorten the output of the transfer case, thereby...
  15. Shawn at Tom Wood's

    Tom Wood driveshaft lost a weight

    More often than I would like but not often if you take into account the number of shafts we produce. It is frankly quite difficult to get a good weld on the balance weights. Because we are welding dissimilar materials and because we gotta keep the welds small so we don't throw off the balance...
  16. Shawn at Tom Wood's

    U-joint squeak, un-greased wheel bearing, or dying front driveshaft?

    That's one of the reason I advocate that people use a small hammer, around 16 oz. Because if you have to hit things so hard that you need a 24 oz hammer you're probably going to damage something.
  17. Shawn at Tom Wood's

    U-joint squeak, un-greased wheel bearing, or dying front driveshaft?

    We both commented at almost exactly the same time with basically the same thoughts!
  18. Shawn at Tom Wood's

    U-joint squeak, un-greased wheel bearing, or dying front driveshaft?

    That kit from Denny's should be all you need. That is a great price for all those parts BTW. If you don't have much experience changing u-joints this page may be helpful: https://4xshaft.com/blogs/general-tech-info-articles/diy-u-joint-replacement
  19. Shawn at Tom Wood's

    Play in rear driveshaft

    I agree with others that this is not good. To be clear though, the play is in the pinion, not the drive shaft, so I don't think you need a new drive shaft or to get your drive shaft repaired. You do need to fix something in your pinion/differential though. It could be that you need to just...
  20. Shawn at Tom Wood's

    Drive line vibration after alignment

    What others have said is correct, your drive shaft doesn't know the difference between up, down, left, and right. What matters is the total angle. So if you are bumping right up against the limits of vertical angle and then you add a couple/few degrees of side angle you exceed those limits and...