when making a left turn I feel some clunking or vibration what can I do to ease
this ,I know this has been discussed before But I can't seem to find the thread

also I am going to change the fluids in both front and read diffs what should I put in rear to eliminate noise ie Oil ???

thanks

 

I used the Mopar Posi additive in my old truck. Wish I had posi in this one.

 

Please fill out your sig so we can see if you're driving a 1963 D250 or a 2010 Dodge 5500.

My truck takes no additives in the pumpkins.... And some clunking is normal on a locking diff... I had an old posi Chevy car that you'd swear was going to come apart during slow turns in a parking lot.... I miss that old Posi-Traction !!!

 

so you don't think I need the additive in the rear end ?

 

Some do, some don't. Some like mine are specifically called out to add NO additives.

 

Ah! I see you added your sig!

The 2003 should have an 11.5" ring gear diff and requires no additives. That said, some add a friction modifier if they feel a shutter after changing fluids.

There is no clutch pack in the 2003 AAM axle, so it doesn't need the modifier, but it shouldn't hurt to add it if you need it.

Dodge says don't add any FM's.....

 

that being said I won't
thanks for the info