what gear oil to use to bring the whine down a little 80-90 or 75-140?

[erickmarciano]

just adjusted the rotation force on the rear diff from 12 lbs to 16lbs and the diff now makes less noise . would the type of gear oil affect the noise? is so what to use to minimize the noise?
thanks

[awolff280sl]

Before I tightened my diff drag, I had a definite whine betwen 45-60mph. After tightening it is barely perceptable and I can only hear it between 55-60mph with acceleration. I'm using Redline synthetic 75-90, don't know if it makes a difference.

[erickmarciano]

thanks for all your past help ,the job was very easy with the right tools.my noise is only barely noticible at the same speed as you. hope I did not tighten it to much .
to all the others do you think synthetic would lower the noise even more?

thanks

[jameshoward]

Erik,

Can you define 'really easy' and 'the right tools'? I am about to attempt with another the replacement of my rear axle and will want to give it the once over beforehand.

Is the process one that is easily described?

James

[Garry]

James,

Did I read that right, you are about to take out the 3.46 axle and replace it with another??
Garry

[erickmarciano]

i did what was here . from the jag link the only differnce is used a torque wrench with a dial like this

http://cgi.ebay.com/ebaymotors/snap-on-torque-wrench-TE12A-3-8-Drive-150-inchpound_W0QQcmdZViewItemQQcategoryZ43994QQihZ007QQitemZ170327951335QQrdZ1QQsspagenameZWDVW

http://www.sl113.org/forums/index.php?topic=10572.0