Quote:
Originally Posted by nuzzo
yes he did, he said he only uses synthetic gear oil also on lower gears like that.......he did say he was surprised to see an open carrier instead of posi.....said he would work with me if i wanted to put a posi unit in he wouldnt charge to change the gears if i wanted to try another brand to quiet it down
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nuzzo: It appears you have a 6-speed?
This only LOOKS like it has no posi. It actually does have a limited slip capability builkt in, but it is NOT conventional like your guy is used to seeing. This Eaton setup behaves like an open diff until one wheel starts to spin, and then it locks up.
Secondly, there are several ways to address the noise.
The best way is to replace the silly factory light gauge "ringtone" aluminum dirveshaft with a quieter one that does not play music based on excitations from the rear axle
. One of Dennis Reinhart's metal matrix composite driveshafts is perfect. It totally silenced my Motive Gear 4.56 rear end noise.
A less effective solution is to use "climbing fluid" in the axle housing versus normal syntehtic lubricant. The "climbing fluid" "clings" to the gears much more aggressivley and thus silences some (not all) of the noise. Check with a more technical source than me to ensure that climbing fluid is comaptoible with this Eaton axle (it is with the automatic axle).
Thirdly, a change in backlash clearance can make a difference in noise produced. The Motive Gear instrucitons called for a much looser clearnce than we ultimately went with in mine. The tighter clearnace helped make it quieter, but don't go TOO tight or it will seize up! You can search on my postings from about mid 2005 to get all the details on clearances I used. I cannot remember them.
The best solution by FAR is of course the driveshaft. Dennis's MMC shaft is totally awesome. Last I hear, he had a sourcing problem for the MMC shaft, but may have overcome it by now.
Jim G
