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

[69 Valiant Kid]

what fluid are you guys running?

 

[yellowdartdave]

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.

 

[69 Valiant Kid]

do you know what weight?...anyone?

 

[Duster346]

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:

 

[69 Valiant Kid]

hey thanks for the help duster 346....nice story too...

 

[Ace]

Some gear lubes already have the LS additive. That's one reason I like Royal Purple MaxGear. No worries, just one fluid to buy.

 

[ramcharger]

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.

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.

 

[2shelbys]

Amsoil Severe Gear 75W-140 plus Slip Lock additive.