2007 Mack vision CXN613 FRONT Rear End

[Onyx610]

14 minutes ago, MACKS said:

On a side note,I was told many years ago to always check the rears hot as soon as u park the truck or you will get a false reading because some lube from the top of the carrier will drain down to the bottom making it look full or even over full..

Makes sense 

[Shortdawg67]

this is the front of the 2nd rear end. I recently had the truck all around power washed yesterday and seen this for my post trip after 200 miles today.. can any of you fellas indicate what I may need here??? 

[Joey Mack]

Looks like the input housing is loose.  The bolts are 16mm or 5/8 12 point..  you can pull it out as a unit, clean the steel shims, Be careful, they will cut you... Then lightly apply Mack Gray RTV to the shims and re- install it..  I believe the bolt torque is 175 lbft..  when you handle the shims, pay attention to the oil gallery holes in the shims.. make sure you don't cover the holes, by accidently rotating a shim in correctly. 

[Shortdawg67]

Should I put a new gasket as well on there??

[Joey Mack]

there is no gasket, just shims and rtv...  the smaller seal housing directly behind the yoke may have a gasket or o-ring, but if it is not leaking, then there is no need to remove the yoke... dont go heavy with rtv, you dont want to change the bearing preload..  jojo

[Onyx610]

And if it’s that loose you most likely already have changed the preload. So I’d advise fixing it before driving it again. The one in front would be a seal. It’s not worth the hassle trying to get that yoke off right now. I say that because it’s always a bitch when I take one off. 

[Onyx610]

The o ring on the bevel gear compartment may be leaking. You can change that pretty easily. 

[Onyx610]

Just make sure you find out if the cover is plastic or metal before you call. They will ask you. 

[Shortdawg67]

What I’m wondering is, since the shop that replaced my front rear end; took that whole section apart and put it back together. This is Now the 2nd back half rear end, but the FRONT of the 2nd back half rear end is the picture I posted… Did they have to mess with that section that I’m now having to do maintenance to??? (If you get what I’m saying 🥲)

[Onyx610]

Pry left the drive shaft hanging on it 

[Onyx610]

Was usually clean before you ever took it to them?

[Onyx610]

Wonder if the flange is cracked and not just loose. That’s a bad leak….

[Shortdawg67]

They only cleaned there area that they had to repair which was that front rear end. Now I am having an issue with this 2nd rear end 🤦🏻‍♂️ looks like I’ll be back at the shop tomorrow morning and hopefully some simple fixes and not a crack as you said @Onyx610

[Onyx610]

You’re having a tough time with this truck. I feel for you bud. Are these the same guys that did your engine rebuild? Don’t worry you will get it all straightened and be good to go for a while. Big trucks big bucks!

[Shortdawg67]

I really am bro. It’s a project truck for real. No, I have a separate individual mechanic for the engine rebuild. Then I go to a shop for light maintenance that the company I owner operate to; built.. they’re convenient for accepting payments out of my statements. But as you all have witness, gave me a new rear end lol

[Onyx610]

Doesn’t just happen to you so don’t beat your self up too much. Let us know how you make out. Got my fingers crossed it’s something dumb like Joey said. Same goes with the oil pressure. That has to be something minor as well.