rtyler8140 Posted October 21, 2009 Share Posted October 21, 2009 I've tried searching to no avail. I was wondering if anyone could tell me if there was a difference in length between a short bed driveshaft and a long bed driveshaft? I did a springover and have a slight driveline vibration and would feel more comfortable with a longer shaft. I was thinking if the long bed had a longer shaft, I could do that. If not, anyone have any suggestions? Thanks in advance. Link to comment Share on other sites More sharing options...
akamcbird Posted October 21, 2009 Share Posted October 21, 2009 what are your specs? lwb... engine, trans, t-case, axle... this info is just as important as lwb or swb when asking about drive shafts (put it in your sig) soa shouldnt cause vibes. check your u-joints then check the angle of your pinion vs the angle of your output yoke. a slip yoke from a yj? iirc is a bit longer Link to comment Share on other sites More sharing options...
mjeff87 Posted October 21, 2009 Share Posted October 21, 2009 did you install new u-joints? They tend to wear in at the fixed angle they've been operating at, and when you change the operational angle they aren't very happy. I'd swap them as a start..... Jeff Link to comment Share on other sites More sharing options...
Pete M Posted October 21, 2009 Share Posted October 21, 2009 did you install new u-joints? They tend to wear in at the fixed angle they've been operating at, and when you change the operational angle they aren't very happy. I'd swap them as a start..... Jeff :agree: Given identical drivetrains, the longbed MJ will have a driveshaft 6" longer than a shortbed MJ. If you have a 4.0L auto, you can get a driveshaft from a 4.0L stick and it'll be 1" longer. Link to comment Share on other sites More sharing options...
rtyler8140 Posted October 21, 2009 Author Share Posted October 21, 2009 Hrm...It's a 1987 4.0L auto short bed. My mechanic did the soa and said I could probably use a little bit longer driveshaft, but as long as I don't beat and bang on it off-road it would be fine. I will have to throw some new U-joints at it and see what that does. (Pete is gonna love this part)...Probably doesn't help matters that I'm running 33's with stock gearing. :doh: I think I might be putting some 4.56's in pretty soon. Also, just out of curiosity, I currently have 6.5" of lift in the front and about 8" in the rear. Could I bump it up to 8'" in the front without having to extend the front driveshaft? Link to comment Share on other sites More sharing options...
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