It appears that additive is a Mopar product and comes in a 4oz bottle. Regardless whether my rear end is a sure grip, posi, power lock, or trac lock, would this product be used in any of them?? Also, would you recommend 1 or 2 bottles (4oz or 8oz)? thanks, Richard
I've heard that from others. This rear axle world that I've entered is confusing enough without adding synthetic products. Unless there is a significant reason to use it, I'll stay away from it, thanks, Richard
Use the whole bottle then fill with gear oil 75-90 gl4 is what I use.
Thanks for the information, Richard
"Sure Grip" as they said is just Mopar speak for posi (cough cough). If you have a Dana, a WS23U0_ with a 727, on your fender tag check 2nd line from top, 2nd number in, should be "084" = axle package = A32 Super Performance Axle package = Dana 60 - 9.75 with 4.10 Sure Grip (also includes 7 blade fan, 26" radiator and power front brakes). The 3.54s were probably swapped for better driveability. 3.55 wasn't Dana and only came on A36 packages.
Depends, early SPDs could still have the Powr-Lok before the Trak-Lok phased them out for 1970.
What makes it better than the others? I would go with the additive that Mopar has, unless there is a good reason not to.....................MO
I think if you are starting from no oil in the differential, you are doing the right thing. I started with a complete re-built 742 sure grip, including the clutches, used non synthetic GL4 oil and the Mopar non synthetic sure grip additive ( Mopar friction modifier) Mine works just as Ma Mopar intended-perfect.
I used to change mine quite often.....usually because I was swapping gear ratios a lot and didn't want to chance any dirt from the swap getting in the drain pan. At one time I was using a suction gun but that was a rpita.
I did the same thing but got the same results from both and that's when I tried the STP for the first time in a rear end. First time I used that stuff was to 'doctor' a 69 Dodge pickup in the mid 70's. Hard to believe it smoked so bad when it was only 6 years old but it looked like it was rode hard and put up wet. 3 cans later and no more smoke!
Next patient was a 65 Mustang with a tired 289 but just one can did the trick. Fast forward to the early 80's and now working at Exxon and one night while doing some maintenance work in the lab, I run into this chem engineer and asked about the use of STP. He chuckled at the question but explained that a product that STP uses and trademarked is used in just about all lubricants. Only thing is, the product that most refiners use isn't marketed as STP....and since it's sold only to refiners, it's not marketed to the general public but basically, STP is pretty close to the same stuff. I did manage to end up with a couple of quarts from the refinery and it's even heavier that what STP packages if that can be possible lol.
I used to change mine quite often.....usually because I was swapping gear ratios a lot and didn't want to chance any dirt from the swap getting in the drain pan. At one time I was using a suction gun but that was a rpita.
I did the same thing but got the same results from both and that's when I tried the STP for the first time in a rear end. First time I used that stuff was to 'doctor' a 69 Dodge pickup in the mid 70's. Hard to believe it smoked so bad when it was only 6 years old but it looked like it was rode hard and put up wet. 3 cans later and no more smoke!
