74 360 dart sport
Well-Known Member
What is the best gear oil and friction modifier for a 1969 8.75 suregrip thank you
No Montevideo MinnesotaAre you really in Uruguay?
I would recommend any regular 85-90 weight gear oil you can find ( NOT synthetic!) that has a limited slip additive in it.
IF you can get it, the Motorcraft friction modifier, (Ford dealer) is the preferred stuff.
Your 69 should be a clutch style sure grip, a little more picky about gear oil than the cone, but stronger and preferred over the later cone type.
I thought you were in South America.No Montevideo Minnesota
Originally it had 80/90 I would bet. Dr Diff sells the Ford branded friction modifier. It must be good if he recommends it.
Okay, that's easier! My advice stands. Dino oil, Motorcraft additive, NO SYNTHETIC.No Montevideo Minnesota
Nice! Straight 90. Lovin' your license plate wall covering.
I've always wondered why people recommend the Ford additiveI bet the Mopar stuff is good too. View attachment 1715944371
I think it is a matter of recommending what we know works, from experience. Versus recommending something simply because the brand name matches.I've always wondered why people recommend the Ford additive
When Mopar has their own?
I'm sure it's similar/same but why not use Mopar in your Mopar?
Just saying...
That's what I would do. (ONLY two pints? What rear?)A question for all you that have done this a few times,
How much Friction Modifier do you use? Service Manual calls for 2 pints of lubricant, of course I find Lucas in a 1 quart bottle & FM in 4oz. Do I use the full 4oz, the bring the oil to the hole?
Fill to the hole. Lucas says it is ready for limited slip, but that would be my last choice. Advance Auto is in Chesapeake. See if they have Valvoline or Castrol 80W-90with LS additive already blended in. The stores near me have it. Try that first. If you get clutch chatter out of your rear end, add a very small amount of additive. Like 1/2 an ounce. This is a case of where the right amount is necessary, but too much is no good.A question for all you that have done this a few times,
How much Friction Modifier do you use? Service Manual calls for 2 pints of lubricant, of course I find Lucas in a 1 quart bottle & FM in 4oz. Do I use the full 4oz, the bring the oil to the hole?
Thanks, I looked again, & I had been in the 7-1/4 specs. (Scrolling on a phone screen-without glasses)That's what I would do. (ONLY two pints? What rear?)
Okay, that's easier! My advice stands. Dino oil, Motorcraft additive, NO SYNTHETIC.
Edit: i had a buddy, since passed, who owned his own rear-end shop. Would NOT use synthetic, used nothing but Torco, bought it by the pallet load.
I like the stuff s'cuder recommended too.