just put in a new posi what gear oil?

[69dodgedart360]

Hey everybody i have a used ring and pinion with new bearings and seals and i just put in a powertrax lockright part # 1240 and am wondering how much gear oil, what grade of oil and if i need an additive to put in with this. i also was told the proper brake in procedure was to drive it for about 15 minutes and no burnouts or taking off hard, let it cool for 45 minutes and do that all over again for about 100 miles and after that i can drive it on the freeway and after 500 miles i can do whatever i want. is this true?
Thanks

P.S. This is a 741 case with 3.55's

 

[70DartMike]

I think the generic type to use is 80/90, and just fill it up until it starts to spill out the hole that you put fluid in.

 

[63dartman]

you also need a friction additive if you posi is a clutch type unit.

 

[69dodgedart360]

should the fluid always be synthetic or not synthetic from now on?

 

[daredevil]

mopar posi huh:dontknow:

 

[74Dusterkid]

if its a locker there are no clutches just straight teeth right? that is a locker and will make loud noises when you turn cause the teeth will slam together while turning. and my dads friend had problems with synthetic gear oil in mopar cone type rears so. i used lakewood bfl yellow label gear oil in my 8 1/4 with a clutch sure-grip. i dont know if theres a special gear oil needed. if you have "instructions" see if it says anything about a special gear oil needed.

 

[65barracudadude]

We Call These Sure Grip's !!!!!!!!!!!!!!!!!!!

 

[1967DartGT]

We Call These Sure Grip's !!!!!!!!!!!!!!!!!!!

Maybe true if he were asking a question about a factory limited-slip differential. Since his question was about a Powertrax Lockrite he can call it whatever he wants.

 

[69dodgedart360]

sorry about the confusion

 

[69DARTS]

We Call These Sure Grip's !!!!!!!!!!!!!!!!!!!

yep that what they are called 100% right on

 

[daredevil]

Maybe true if he were asking a question about a factory limited-slip differential. Since his question was about a Powertrax Lockrite he can call it whatever he wants.

you win.