I don't know diddly about transmission components on these trucks...but I have some noise coming from the rear axle...could it be a bearing...and if so WHERE...or could it be Diff fluid?? How do I check that and top it off?? Have the fluid...just want a little guidance, so hopefully I will save a little time on this project.

Thanks!

HappyJACK

 

what kind of noise?
when does it happen?
under decel, or while speeding up?

 

Hi YNEVADA, thanks for the response!!

I can hear it when I am coasting at slow speeds...sounds like metal to metal...OUCH! I know! That isn't good...but what should I tackle first??

 

while under throttle its quiet?

might be carrier bearings.

what year and model is the truck? what rear? 9" or d60?

if its got a removeable cover, pop it off, check the oil for heavy shavings.
check if the carrier goes SIDE TO SIDE.

 

Check the filler plug first -- normally, it has a magnet to catch metal shavings, so you don't necessarily have to take the cover off.

 

Is the filler plug on the top side of the diff? My truck has whatever rear end comes standard with a 2000 Excursion 7.3 Diesel...it is not the real low rear end!! It's hard to hear anything coming from it at much speed primarily due to road noise. It may very well be singin' like a sparrow...but I can't hear it that much unless I am off the throttle and coasting under 30mph...

 

Thank you guys for responding...this truck has had constant issues since I bought it...so I am through with the dealer service thing...

ANOTHER QUESTION...should the A/C condenser be dripping even when I am NOT using the A/C?? I have the vents on, but NOT on A/C - but I was getting a pretty steady drip behind the right front tire...doesn't seem normal to me!!

 

the compressor will cycle on/off whether u have the AC engaged or not.
normal...

 

Just like said above, check you carridge bearing, its where the two drive shafts connect. Metal piece with rubber interior that holds the drive shafts in place. I had to change mine out, got to be pressed out. Good luck.