sure grip oil

[67belvedere/225]

what do run in your diff for oil
I used regular Castrol gear oil with a friction modifier additive
is synth better???

 

[1967coronet440]

A lot of guys here like the ford additive, I think dr diff even recommends it

 

[1967coronet440]

I use Lucas synthetic in mine, it’s an s trac though so no additive

 

[threewood]

I ran Lucas 80w-90 because that is what Tractor Supply stocks, plus a bottle of Mopar friction modifier. Whithout it the rear was super grabby.

Edit: 8 3/4 with clutch sure grip.

 

[khryslerkid]

A lot of guys here like the ford additive, I think dr diff even recommends it

And regular gear oil, not sync. I used 80w90. The additive is called XL3. Get it at your local Ferd dealer. Dr. Diff says nothing else will last as long and preform better.

 

[khryslerkid]

Friction modifier isn't used in an open rear, only clutch sure grip.

 

[67belvedere/225]

And regular gear oil, not sync. I used 80w90. The additive is called XL3. Get it at your local Ferd dealer. Dr. Diff says nothing else will last as long and preform better.
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funny thats what i had in her before ,i used castrol and the ford stuff
thanks

 

[Cranky]

When I changed the oil in my 2000 Durango (Crap Lock) and added the Ford additive, it was fine for about a 1000 miles then started chattering. STP went in next and it's been good for the last 50+k miles.

 

[Dennis H]

Can't remember what's in, but did not add the modifier. No chatter. Dana.

 

[loganlane68]

When I changed the oil in my 2000 Durango (Crap Lock) and added the Ford additive, it was fine for about a 1000 miles then started chattering. STP went in next and it's been good for the last 50+k miles.

I have read you saying that before.
How much STP? A whole bottle?
Thanks

 

[YY1]

O'Reily's has three different brands of 80/90/120 that have limited slip additive already mixed in.

I bought the Castrol brand.

I was shocked they had them and at the fairly inexpensive price.

The last time I tried to buy some was about 1992, and it was almost impossible to find.

 

[Cranky]

I have read you saying that before.
How much STP? A whole bottle?
Thanks

About the same amount as a bottle of the LSD additive.....

 

[loganlane68]

About the same amount as a bottle of the LSD additive.....

Thanks
I'm going to give it a shot.
the Ford dealer here isn't the greatest with that kind of stuff.

 

[biomedtechguy]

the LSD additive.....

Far out man...
I just used the Ford friction modifier that Cass recommended.

 

[Cranky]

Far out man...
I just used the Ford friction modifier that Cass recommended.

Never tried it in the older LSD's but it didn't work in the Crap Lock I mean Trac Lock that's in my 2000 Durango.....

 

[biomedtechguy]

Never tried it in the older LSD's but it didn't work in the Crap Lock I mean Trac Lock that's in my 2000 Durango.....

I had a new power lock installed with my 4.10 Dana/Spicer r&p replacing my 3.54. ZERO chatter. ALL good. (Can't WAIT for next Sunday "Sunday! Sunday!" to try the new ratio on the 1320)