what gear lube and modifier for a 83/4, 3.91 posi rear end..

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In my Dakota R/T.... Synthetic with 2 bottles of Mopar additive.....
156k miles with a lot of towing so I change it every 25 to 30k miles.
 
75w140 synthetic ... the limited-slip additive .. we called it whale sperm at the dealer. I'm not sure why (never smelled it), but I always asked for whale sperm at the parts counter when I worked for Chrysler. Went into the local NAPA the other day, and asked if they had any whale sperm and they looked at me like I had three heads. :laughing:
 
Some gear lubes already have the LS additive. That's one reason I like Royal Purple MaxGear. No worries, just one fluid to buy.
 
Duster346 said:
Went into the local NAPA the other day, and asked if they had any whale sperm and they looked at me like I had three heads.
Click to expand...

ROTFLMAO! Thanks Chris, I needed that today. I was just picturing the look on the counter people's faces when you said that. **** man, I'm still laughing.
 
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