Dieselman350

I told um to get the front diff coming its obviously where the noise was coming from had metal chunks in it also going to replace torque arms and suspension wear pads and hold off on the transmission 

Well rearend noise got worse took it to dealer they found the front diff has damage and want to put one in and they want to rebuild the synchronizers in the transmission 

Yea I don't think it's the transmission anymore 

I'm gunna take that cover off and check it out good idea on locking it in and turning it will do it at slow speeds 

It has a interaxle lockout switch in the cab so power divider I think I'll try taking that cover off and inspect in there

Found 2 u joints with a little movement so replaced those which seemed to change the noise now I really am leaning towards the front diff now I can make it growl/rattle in almost any gear going slow under load checked both with heat gun after a drive both about 125 I figured one would be hotter but there not but I'm still leaning on rearend 

The tag on the tranny says 2017 ReMack so it's been replaced but idk when or why 

I think the noise has been there just getting more pronounced 

I've been told the whole truck is about as tough as they come so shouldn't have to many issues lol

It will grind a little when it's cold going from low to high on the initial first shift in the morning so I think the synchronizers  are probably starting to get wore which doesn't concern me as much as the rattling noise I'll take a good look at the driveline though 

I've had if for about a year it doesn't seem to do it in high gear but definitely 7th gear 

It has a e7 460 and mack diffs but all rear tires are new 

I have a 01 cl713 with a maxitorque T2130 13 speed transmission and when under a load in 7th gear it seems to make a rattling noise not sure what it is all u joints seem good or is it just normal for this transmission doesn't seem to do it in other gears

Thanks for the info I appreciate the responses I been getting it back up to snuff on maintenance I bought it it 1 year ago its my first Mack and has made me want another one lol

I have a 2001 CL713 quad axle dump truck with a E7 460 and 18 speed it pulls pretty good grossing 70000# but I would like to add a pup wondering how u guys think it would pull grossing over 100000# and would it stay cool or just be to hard on truck