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Gear oil options?

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Fryeken

Gear oil options?

Morning gentlemen,
I’m wanted to ask if motorcraft hypoid is the only gear oil of choice for the Dana 50 and 10.25 rear? I have no reason to believe mine is not on the original fill and after all these years think it should be freshened up. I found it at rockauto for $25/ quart, but I’m curious why a standard 75/90 with friction modifier won’t work the same.

Gary Lewis

Re: Gear oil options?

Administrator

A name-brand 75/90 or 80/90 will be fine, unless you have the limited-slip diff and then the friction modifier is needed. I run Mobil 1 synthetic, but that is probably overkill.

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

Fryeken

Re: Gear oil options?

Thanks Gary,

I miss the smell of friction modifier.

Gary Lewis

Re: Gear oil options?

Administrator

That stuff STINKS! Do you have a pet skunk?

Gary, AKA "Gary fellow": Profile

Atlas75

Re: Gear oil options?

Perfect timing on this question. I need to change my rear axel fluid as well. I have been looking at this product at Walmart. Seems like it will do the trick. Any issues with using this in a Dana 61?

Carl

1980 F-350 4X4; 400 C6; Dana 61 rear, Dana 50 TTB front
1984 F-250 4X4; 6.9L T19; Dana 70 rear, Dana 44 TTB front

Gary Lewis

Re: Gear oil options?

Administrator

I don't see any problem with it. And that style of container is great.

Gary, AKA "Gary fellow": Profile

kramttocs

Re: Gear oil options?

Administrator

Agreed

I put the Amsoil in my 10.25 using those bags and it really made it clean and easy.

Scott
'Camano' 1986 F250 Supercab XLT Lariat 460/C6
'Chanute' 1980 F350 C&C 400/NP 435 - Gin Pole

But there ain't nothin' wrong with the radio