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Old 01-06-2010, 09:04 PM
whitedge whitedge is offline
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Default Rear diff/ what weight oil?

Does anybody know what weight oil and how many quarts I need for my rear diff. It is a 05 ranger edge and it has a open diff with the 7.5" ring gear and a 28 spline axle. Also do I want to run synthetic or dyno oil. I am installing a powertrax lock right 1830 and doing the rear disk brake mod. Also do you think because I am adding the locker I should use oil that is for a limited slip diff? Sorry for all the questions but I am at work and I no longer have a owners manual as it was stolen.
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Last edited by whitedge; 01-06-2010 at 09:10 PM.
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Old 01-06-2010, 09:10 PM
Johnbaum13 Johnbaum13 is offline
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Check with the locker manufacturer to see what the recommend for the locker. Thats what you'll want to run. If they say to use the normal fluid, then 75/90 gear oil is what you want. As far as dino oil v.s. synthetic, I personally prefer synthetic, and use Amsoil in my L/S 8.8 axle.
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Old 01-06-2010, 09:15 PM
whitedge whitedge is offline
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Quote:
Originally Posted by Johnbaum13 View Post
Check with the locker manufacturer to see what the recommend for the locker. Thats what you'll want to run. If they say to use the normal fluid, then 75/90 gear oil is what you want. As far as dino oil v.s. synthetic, I personally prefer synthetic, and use Amsoil in my L/S 8.8 axle.
Thanks, I will give them a call tomorrow. As for the amount of fluid is 2.5 quarts?????
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1991 Ranger 4.0L 4X4 STOLEN!1990 F-150 6.5L 4X4-- Trussed Giant D44 TTB w/14" King 2.5 coilovers & 2" King bumps strapped at 17" /custom bed cage w/16" King/Giant link killer 2.5 double bypass and Giant 64's strapped at 19" / Giant radius arms and engine cage / double swing steering / trussed 8.8 with 9" ends / 4.88 gearing / 35's / KMC beadlocks / Headers, & exhaust / custom front and rear bumpers / Vision-X lighting / 40 gallon fuel cell / Lowrance GPS.\_(ツ)_/
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Old 01-06-2010, 09:16 PM
Fx4wannabe01 Fx4wannabe01 is offline
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80w90 is the Ford spec. I run 75W90 Royal Purple full synthetic.

Synthetic oil has better cooling additives in it....and cooler gears are happy long lasting gears.

The amount of fluid....?? I honestly don't know. But my 31spline 8.8 totally dry too a full gallon of oil to fill. My spec said 3qts. Happy I got a gallon. Now....you've got alot smaller tubes and smaller diff. Honestly don't know the fill spec for 7.5's.
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Old 01-06-2010, 09:22 PM
whitedge whitedge is offline
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Gotta love the fast responses, but do any of you guys know how many quarts I need? Sorry for all the questions, but my owners manual was stolen and autozone was useless .
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1991 Ranger 4.0L 4X4 STOLEN!1990 F-150 6.5L 4X4-- Trussed Giant D44 TTB w/14" King 2.5 coilovers & 2" King bumps strapped at 17" /custom bed cage w/16" King/Giant link killer 2.5 double bypass and Giant 64's strapped at 19" / Giant radius arms and engine cage / double swing steering / trussed 8.8 with 9" ends / 4.88 gearing / 35's / KMC beadlocks / Headers, & exhaust / custom front and rear bumpers / Vision-X lighting / 40 gallon fuel cell / Lowrance GPS.\_(ツ)_/
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Old 01-06-2010, 09:27 PM
Johnbaum13 Johnbaum13 is offline
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I've never filled a 7.5, took it out instead. But according to Ford (owners manual), it takes 2.5 quarts for a 7.5, and 2.75 quarts for the 8.8. My 8.8 took 3 quarts, and it wasn't quite topped off, but the fill spec is to .25" below the fill hole.

I'd say, get 3 quarts, and put them in. If it isn't running out the hole, you're good.
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Old 01-06-2010, 09:27 PM
Fx4wannabe01 Fx4wannabe01 is offline
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Ford's Tech site says 5.0 pints which is 2.5 quarts on a 7.5 Ranger axle. I'd grab 3 and get a forth just in case. Take the extra one back if you didn't need it.


*Jbaum beat me. Send me some Shiner damnit!
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Old 01-06-2010, 09:30 PM
Johnbaum13 Johnbaum13 is offline
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^^^ For that I would need an address and money......and motivation.


But I gotta tell you, this here ice cold Ziegen Bock in my hand sure does tate good!
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Old 01-06-2010, 09:32 PM
whitedge whitedge is offline
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Thanks guy's you rock
Id give ya both a rep point, but looks like this site dose without.
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1991 Ranger 4.0L 4X4 STOLEN!1990 F-150 6.5L 4X4-- Trussed Giant D44 TTB w/14" King 2.5 coilovers & 2" King bumps strapped at 17" /custom bed cage w/16" King/Giant link killer 2.5 double bypass and Giant 64's strapped at 19" / Giant radius arms and engine cage / double swing steering / trussed 8.8 with 9" ends / 4.88 gearing / 35's / KMC beadlocks / Headers, & exhaust / custom front and rear bumpers / Vision-X lighting / 40 gallon fuel cell / Lowrance GPS.\_(ツ)_/
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