what weight rear axle lube??? - Ford Mustang Forum
 
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post #1 of 14 (permalink) Old 02-07-2009 Thread Starter
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Smile what weight rear axle lube???

hey all, my buddy has a 2006 mustang gt auto and we are puttting 4.10s into his car next weekend. i want to be sure that i am getting the right weight lube for doing so. i already have the friction modifier, but was unsure of which weight to go with. my 97 gt takes 80-90, but looking at threads on this site i have found 75-140 or 75-90??? any idea, i found mine in the owners manual but i am unsure if he got one with his car, seeing as he bought it used

one more thing, for the clutch packs in my locker. i will be replacing them so i heard something about soaking them in either the lube or the friction modifier overnight? anybody heard of this and if so which do i soak it in. thanks in advance

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post #2 of 14 (permalink) Old 02-07-2009
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weather u soak them or not, fluid will work in, my sisters packs his different.. his is pretty much locked up...but his isint ment to turn much.

open the install manual of the gears it will tell u

i think motive said like an 85 weight. but dont quote me on that. look in the booklet!
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post #3 of 14 (permalink) Old 02-07-2009
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4.25 pts High Performance SAE 75W-140 Rear Axle Lubricant F1TZ-19580-B
4 oz Additive Friction Modifier XL-3 C8AZ-19B546-A

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post #4 of 14 (permalink) Old 02-07-2009
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And go with a petroleum based gear oil instead of a synthetic.
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post #5 of 14 (permalink) Old 02-07-2009
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Quote:
Originally Posted by gmantheman View Post
And go with a petroleum based gear oil instead of a synthetic.
That's what I did but not sure it's right in all cases.

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post #6 of 14 (permalink) Old 02-07-2009
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You guys using straight petroleum lube convert your cars back to breaker points too?
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post #7 of 14 (permalink) Old 02-07-2009
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Originally Posted by stlwagon View Post
4.25 pts High Performance SAE 75W-140 Rear Axle Lubricant F1TZ-19580-B
4 oz Additive Friction Modifier XL-3 C8AZ-19B546-A
I took STL's advice and that oil works great. I went with RP Syn as well.

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post #8 of 14 (permalink) Old 02-07-2009 Thread Starter
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sounds good, thanks!!

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post #9 of 14 (permalink) Old 02-07-2009
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Quote:
Originally Posted by Alfaduetto View Post
You guys using straight petroleum lube convert your cars back to breaker points too?
Funny...

But, the point is that synthetic does not adhere to the ring gear as well as dino oil does. It is actually too slick, and has a tendency to provide less lubrication that a good petroluem oil. You go ahead and do whatever makes you happy, but I'll stick with what one of the best gear shops on the west coast did for me.

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Quote:
Originally Posted by bigwilly43729
HP numbers are good and all, but they are like asking someone how much they can bench. What difference does it make if I can still kick your a$$?
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Funny...

But, the point is that synthetic does not adhere to the ring gear as well as dino oil does. It is actually too slick, and has a tendency to provide less lubrication that a good petroluem oil. You go ahead and do whatever makes you happy, but I'll stick with what one of the best gear shops on the west coast did for me.
I always forget the name of the guy that does the work over at SD gear and axle. I had him change my gear oil and I talk to him at Barona. Although they, SD gear and Axle didn't do my gear install, they did say the shop that did my install did a very good job.
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Quote:
Originally Posted by gmantheman View Post
I always forget the name of the guy that does the work over at SD gear and axle. I had him change my gear oil and I talk to him at Barona. Although they, SD gear and Axle didn't do my gear install, they did say the shop that did my install did a very good job.
Steve Zimmerman owns SD Gear and Axle. He is also a major sponsor at Barona, as well as the lead Tech Inspector.

2005 Sonic Blue, a.k.a. "BAD 05 GT", Auto Trans (and damn proud of it!)
Best 1/8 mi: 6.691 @ 103.04, DA= 1,166' (2-19-09)
Best 1/4 mi: 10.37 @ 132.98 (3-14-08)

Kenne Bell 2.8L SC, Boss 5.0 Block w/Cobra crank, Diamond Pistons, Scat Rods, Livernois P&P Heads - Check out my Homepage for Full Mod List and Videos
Quote:
Originally Posted by bigwilly43729
HP numbers are good and all, but they are like asking someone how much they can bench. What difference does it make if I can still kick your a$$?
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Quote:
Originally Posted by don_w View Post
But, the point is that synthetic does not adhere to the ring gear as well as dino oil does.
That's exactly what Ford Racing told my installer. I've been running 85W-90 conventional for some time now...

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Quote:
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Steve Zimmerman owns SD Gear and Axle. He is also a major sponsor at Barona, as well as the lead Tech Inspector.
Who is the guy that does the work at SD? He drives the Ford Maverick at Barona. For some reason I am thinking his name is Brian or Keith.
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Quote:
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Who is the guy that does the work at SD? He drives the Ford Maverick at Barona. For some reason I am thinking his name is Brian or Keith.
Oh, him... I think he goes by "Bry", which is probably short for Bryan.

2005 Sonic Blue, a.k.a. "BAD 05 GT", Auto Trans (and damn proud of it!)
Best 1/8 mi: 6.691 @ 103.04, DA= 1,166' (2-19-09)
Best 1/4 mi: 10.37 @ 132.98 (3-14-08)

Kenne Bell 2.8L SC, Boss 5.0 Block w/Cobra crank, Diamond Pistons, Scat Rods, Livernois P&P Heads - Check out my Homepage for Full Mod List and Videos
Quote:
Originally Posted by bigwilly43729
HP numbers are good and all, but they are like asking someone how much they can bench. What difference does it make if I can still kick your a$$?
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