Geico266

I changed my rear differential fluid about 2 years ago, and I added 6-8 OZ of the anti-slip differential modifier. Everything was fine until about 2-3 months ago when I noticed the differential would shutter going around tight corners under a load.

I changed the differential fluid again tonight and added 8 oz of modifier. Seems to work better right away doing figure 8's in the parking lot to mix it up.

Does the modifier wear out? Anyone else notice this?

J BODY

.....I see it quite often. Lack of scheduled maintenance.

Geico266

Changing the fluid sure took care of the problem. Learn something new everyday here.

I would think the additive would last longer than 50K miles. I don't tow that much so I stretch the changes.

Change that differetial fluid boys & girls!

billmac

I replaced the differential fluid in my truck 15k miles ago and put in 2 ozs. of the Mopar Limited Slip additive. Everything worked fine until about two weeks ago when the truck started to get a little chatter going around corners. It's really not that bad and I've read that a little chatter is not harmful. If it gets worse, I will add another oz. or so of additive.

wrm

Why Do The New Trucks Not Need Additive,they Call For The Same Gear Oil.

billmac

I believe the 3rd generation trucks use the American Axel differential instead of the Dana which was used on first & second generation trucks. The anti-spin set-up is different between the two. I'm currently using a synthetic fluid which has the additive in it; however, additional additive may be required depending on how "tight" or loose" the clutch packs are in the differential. I believe that's correct. I don't think the American Axel differential uses clutch packs.

wrm

it is a AMERICAN axel so that explains why . thanks !