2stacksuperdog Posted January 22, 2013 Share Posted January 22, 2013 We have a 88 superliner 350, 12speed, 46K rears and its making a real bad clunking sound/feel. Don't know if rear end or power divider? It started as getting on highway so idk. Any help appreciated! 1 Quote Matt Link to comment Share on other sites More sharing options...
slpwlker Posted January 23, 2013 Share Posted January 23, 2013 What kind of thunk? Does it act up as you slow down? ,Accel , you take off it does anything other then thunk? Quote Link to comment Share on other sites More sharing options...
2stacksuperdog Posted January 23, 2013 Author Share Posted January 23, 2013 You wouldn't notice it until you get going and as you speed up it speeds up 1 Quote Matt Link to comment Share on other sites More sharing options...
HK Trucking Posted January 23, 2013 Share Posted January 23, 2013 Chipped bull gear???A worn power divider jumping over is usually irregular & happens under a hard pull. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment Share on other sites More sharing options...
2stacksuperdog Posted January 23, 2013 Author Share Posted January 23, 2013 Chipped bull gear???A worn power divider jumping over is usually irregular & happens under a hard pull.The truck only has 107,000 miles on it but it does happen when pulling 1 Quote Matt Link to comment Share on other sites More sharing options...
2stacksuperdog Posted January 23, 2013 Author Share Posted January 23, 2013 but not when coasting 1 Quote Matt Link to comment Share on other sites More sharing options...
fjh Posted January 23, 2013 Share Posted January 23, 2013 If you have steel rims check for a cracked inner wheel! (Usually) power divider problems are an fairly evenliy spaced clunk along time in between usually caused by missed matched tires. Quote Link to comment Share on other sites More sharing options...
2stacksuperdog Posted January 23, 2013 Author Share Posted January 23, 2013 its got all same tires and spoke wheels 1 Quote Matt Link to comment Share on other sites More sharing options...
felicello122 Posted January 24, 2013 Share Posted January 24, 2013 any vibrations under pull? Drain some oil out of your rears check for metal. 1 Quote Link to comment Share on other sites More sharing options...
2stacksuperdog Posted January 24, 2013 Author Share Posted January 24, 2013 any vibrations under pull? Drain some oil out of your rears check for metal.That is what were planning on doing when it gets to at least 30 degrees out 1 Quote Matt Link to comment Share on other sites More sharing options...
2stacksuperdog Posted February 4, 2013 Author Share Posted February 4, 2013 OK so we took off the side plate off the front rear end and their was a chunk of teeth lying there. it was from the gear that connects to the power divider so we bring the power divider to Ballard Mack and they order the parts. Well they call up today and say the parts don't match. The ones they ordered are 30 something teeth on the inside where as the one in it has only 8 teeth. they ordered the parts before taking it apart. Are the 8 tooth after Market or for a heavier duty carrier? the truck came from Mass so idk if they put heavier carriers in since Mass lets you move anything with them. anybody have any info? 1 Quote Matt Link to comment Share on other sites More sharing options...
Challenger Posted February 5, 2013 Share Posted February 5, 2013 Sounds like you broke a tooth off the pinion gear. The ring and pinion are a match set, I'm confused on what they ordered. If you broke the pinion you should need a ring and pinion. Its possible that someone changed the ratios so they wont match the build spec. The ratio should be stamped on the right front flat area on the rears. Quote Link to comment Share on other sites More sharing options...
2stacksuperdog Posted February 5, 2013 Author Share Posted February 5, 2013 The guy said he was going to get back to us but didn't tonight. he said he was going to do some research on them so hopefully he just ordered the wrong parts. The outer teeth matched just not the inner. 1 Quote Matt Link to comment Share on other sites More sharing options...
2stacksuperdog Posted February 7, 2013 Author Share Posted February 7, 2013 So the guy from Mack calls back today and says the parts fit all of a sudden? Imagine that! 1 Quote Matt Link to comment Share on other sites More sharing options...
Challenger Posted February 7, 2013 Share Posted February 7, 2013 That's never a good sign. Maybe the gearman was sick that day. 1 Quote Link to comment Share on other sites More sharing options...
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