scottwetzel Posted November 25, 2014 Share Posted November 25, 2014 Ok so I have this noise coming thru the shifter that only happens under a load after driving on the highway for about 20 mins. My truck is a 1988 Superliner 350 with a new 9 speed trans (less then 10000 miles) I think it's coming from the rear drive shaft that connects the 2 rears but I'm not sure. Anybody have any ideas? Please help.trim.xpffRx.MOV Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/ Share on other sites More sharing options...
scottwetzel Posted November 25, 2014 Author Share Posted November 25, 2014 Can't figure out why my video won't work??? Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268155 Share on other sites More sharing options...
farmer52 Posted November 25, 2014 Share Posted November 25, 2014 Video works for me. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268157 Share on other sites More sharing options...
scottwetzel Posted November 25, 2014 Author Share Posted November 25, 2014 ok thanks Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268161 Share on other sites More sharing options...
scottwetzel Posted November 25, 2014 Author Share Posted November 25, 2014 http://youtu.be/DIZ5xCCh_doI copied it to YouTube. Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268162 Share on other sites More sharing options...
gearhead204 Posted November 26, 2014 Share Posted November 26, 2014 I cant say for sure but it sounds like a failed rear, does it also do it under a hard deacceleration? or only under a input load? if you engage the power divider and then accelerate. does this sound change? Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268182 Share on other sites More sharing options...
mack mhe9 Posted November 26, 2014 Share Posted November 26, 2014 my god that sounded bad. that's where id start, pulling the side covers or plugs there should be parts. Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268188 Share on other sites More sharing options...
scottwetzel Posted November 26, 2014 Author Share Posted November 26, 2014 Only does it after driving for 20 mins at highway speeds. And only at highway speeds on a accel. If u pull over then get back on the highway it goes away for around 20 mins. I just don't get it. Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268198 Share on other sites More sharing options...
scottwetzel Posted November 26, 2014 Author Share Posted November 26, 2014 After searching and reviewing I thought it might also be important to mention I did recently replace 4 tires on the front rear axle and are running half worn tires on the rear axle. I'm not trying to jump to conclusions but could this be causing my problem? Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268201 Share on other sites More sharing options...
gearhead204 Posted November 26, 2014 Share Posted November 26, 2014 Scott take a tape measure and wrap it around the worn tire and again on the new how much difference do you have? After you told us this I think it could be the power divider trying to engage, because the front and rear drive shafts are moving at different speeds. I had a old superliner do this to me while on the freeway it would take some time, then the truck would start to quiver and the drive train would get very noisy I could depress the clutch for a few seconds and it would go away then it would rebuild and repeat. Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268205 Share on other sites More sharing options...
mrsmackpaul Posted November 26, 2014 Share Posted November 26, 2014 After searching and reviewing I thought it might also be important to mention I did recently replace 4 tires on the front rear axle and are running half worn tires on the rear axle. I'm not trying to jump to conclusions but could this be causing my problem?In a short answer yes because Im assuming you have Mack diffs the power divider in a Mack diff is not like one in a normal truck as in there are not a third differential you might have to take 2 new tyres of the front axle and put them on the back axle on the opposite side to the ones on the front axle and it counter it out Paul Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268211 Share on other sites More sharing options...
scottwetzel Posted November 26, 2014 Author Share Posted November 26, 2014 Measured my new tires revs my old ones. My new ones have about 2 more inches then the old when u measure the circumstances. I'm gonna switch 2 new tires to the rear axle and see if it changes. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268227 Share on other sites More sharing options...
scottwetzel Posted November 26, 2014 Author Share Posted November 26, 2014 Measured my new tires revs my old ones. My new ones have about 2 more inches then the old when u measure the circumstances. I'm gonna switch 2 new tires to the rear axle and see if it changes.Haha I can't believe I but "circumstances" on my last post. I totally meant circumference. Well anyways I rotated 2 of the new ones to the rear axle on the opposite side, drove it 300 miles and wouldn't you know the problem is gone!!! So basically I'm gonna get 4 new tires and save the half worn out ones for spares!! I just want to say I have learned so much from this website and its been extremely helpful. We have 2 1988 superliners that work everyday and we couldn't be more happier! Thanks again for your help mrsmackpaul and gearhead204!!!!! 2 Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268295 Share on other sites More sharing options...
Popular Post NY-B61 Posted December 2, 2014 Popular Post Share Posted December 2, 2014 Haha I can't believe I but "circumstances" on my last post. I totally meant circumference. Well anyways I rotated 2 of the new ones to the rear axle on the opposite side, drove it 300 miles and wouldn't you know the problem is gone!!! So basically I'm gonna get 4 new tires and save the half worn out ones for spares!! I just want to say I have learned so much from this website and its been extremely helpful. We have 2 1988 superliners that work everyday and we couldn't be more happier! Thanks again for your help mrsmackpaul and gearhead204!!!!!I can almost see you jumping for joy now that there's no unknown repair bill hanging over your head! If you can't find an answer on this forum there isn't one. The shifting forks in my B61 stuck right after I paid money to buy it. I went inside convinced I'd killed the triplex while learning to drive it. It began to rain. The sky looked like an angry, dark repair bill. The lightning was a sign of a ruined transmission that was probably scrap metal. I logged in to BMT and typed in "stuck shifters". 10 minutes later, after a change of underwear, a pry bar and grease gun had me back on the road whistling a tune because all of a sudden the rain stopped and the sun came out. There might have even been birds chirping in there someplace. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/37867-88-superliner-driveline-noise-with-video-help/#findComment-268914 Share on other sites More sharing options...
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