BronsonA2150 Posted October 7 Share Posted October 7 Just had an occasional clunk start in my 94 Mack with Eaton super 10 and Mack rears. When it does it it’s a consistent clunk every second or so and only does it under partial throttle. Goes away at no throttle or full power. Not sure what can be checked externally but don’t see bolts in flywheel housing missing or loose and throw out bearing, input shaft etc. appear fine what I can see. It really sounds like something in transmission area causing the sound but won’t rule out anything in driveshaft or rear ends. All u joints and driveline bearings feel fine. One thing I wondered is I recently had 4 new drive tires put on rear axle and front drive axle has used tires. Could there be enough of a height difference there to cause an issue? I also drained a little oil out of transmission and didn’t see any filings or chunks of metal. Anything else that could be checked? Quote Link to comment https://www.bigmacktrucks.com/topic/76021-clunk-in-94-ch613/ Share on other sites More sharing options...
Joey Mack Posted October 7 Share Posted October 7 Auto power divider ?? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76021-clunk-in-94-ch613/#findComment-583919 Share on other sites More sharing options...
BronsonA2150 Posted October 7 Author Share Posted October 7 25 minutes ago, Joey Mack said: Auto power divider ?? No, air. Also why is my text so dark? Can’t even hardly read it Quote Link to comment https://www.bigmacktrucks.com/topic/76021-clunk-in-94-ch613/#findComment-583922 Share on other sites More sharing options...
fjh Posted October 7 Share Posted October 7 30 minutes ago, Joey Mack said: Auto power divider ?? Yup if the the divider has a lock out use it if the noise goes away you have your answer! If your going to put of size tires on any tandem anybody’s diff put them kitty corner ! It will help distribute the speed difference over the works! just my opinion! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76021-clunk-in-94-ch613/#findComment-583926 Share on other sites More sharing options...
BronsonA2150 Posted October 7 Author Share Posted October 7 21 minutes ago, fjh said: Yup if the the divider has a lock out use it if the noise goes away you have your answer! If your going to put of size tires on any tandem anybody’s diff put them kitty corner ! It will help distribute the speed difference over the works! just my opinion! We talked about that also. Will try that tomorrow Quote Link to comment https://www.bigmacktrucks.com/topic/76021-clunk-in-94-ch613/#findComment-583929 Share on other sites More sharing options...
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