Which Differential Fluid Weight?

aridranger03 · 05-26-2010, 02:55 PM

I am about to change my differential fluid in my truck. It's an 03 with the Ford 8.8 and 4:10 with limited slip. The manual calls for 80w-90 oil but after researching, I am seeing that many people are using different weights. Just wonder if anyone on here has recommendations for a certain weight.

Alex

bcost882 · 05-26-2010, 04:09 PM

i swapped out for the explorer rearend and the explorer book tells you to use 75w140. either one you use, if you don't get synthetic, remember to put in the friction modifier.

exbass94 · 05-26-2010, 05:28 PM

Any 90 weight such as 80w-90 or 75w-90 will be fine. There's not really any reason to use 140 weight. Some fluids such as Valvoline synthetic and Mboil 1 come with the friciton modifier already mixed in.

daniel3507 · 05-26-2010, 07:51 PM

Quote:

Originally Posted by exbass94

Any 90 weight such as 80w-90 or 75w-90 will be fine. There's not really any reason to use 140 weight. Some fluids such as Valvoline synthetic and Mboil 1 come with the friciton modifier already mixed in.

That pretty much sums it up. Personally though I dont use synthetic gear lube. It just doesnt seem thick enough to me to provide the protection that the gears need

exbass94 · 05-26-2010, 08:25 PM

Quote:

Originally Posted by daniel3507

That pretty much sums it up. Personally though I dont use synthetic gear lube. It just doesnt seem thick enough to me to provide the protection that the gears need

The whole point of synthetic is to provide MORE protection. Synthetic isn't any thinner than conventional. A 90 weight oil is a 90 weight oil. But conventional works too...

aridranger03 · 05-26-2010, 09:36 PM

Ok, Thank you guys so much for the help! Valvoline 80w-90 will be going in tonight!

05-26-2010, 02:55 PM	#1
aridranger03 Junior Member Join Date: Dec 2008 Location: Tri-Cities, TN Year: 2003 Make: Ford Model: Edge Flareside Engine: 3.0 V6 Class: 2WD Used For: Taking Me Where Ever I May Roam Posts: 59 Rep Power: 9 iTrader: (0)	Which Differential Fluid Weight? I am about to change my differential fluid in my truck. It's an 03 with the Ford 8.8 and 4:10 with limited slip. The manual calls for 80w-90 oil but after researching, I am seeing that many people are using different weights. Just wonder if anyone on here has recommendations for a certain weight. Alex __________________ 2003 Ford Ranger Edge Reg. Cab Flareside 2wd 3.0 5 Speed 4:10 Limited Slip Mods: 3rd Brake Light To Cargo Light, Tow Hooks, Fabtech AAL, Step Bars Wanted: 06+ Tails, 06+ Corners, Edge Decals, Tint
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05-26-2010, 05:28 PM	#3
exbass94 Member Join Date: Aug 2007 Location: Guilford, CT Year: 2006, 1994 Make: Ford Model: Ranger, Explorer Engine: 4.0 SOHC, 4.0 OHV Class: 4x4 Used For: Pavement Poundin' Posts: 3,076 Rep Power: 21 iTrader: (0)	Any 90 weight such as 80w-90 or 75w-90 will be fine. There's not really any reason to use 140 weight. Some fluids such as Valvoline synthetic and Mboil 1 come with the friciton modifier already mixed in. __________________ 2006 Ford Ranger Sport 4x4 2-dr Extended Cab, 45k miles 1994 Ford Explorer Sport 2-dr 4x4, 178k miles
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05-26-2010, 09:36 PM	#6
aridranger03 Junior Member Join Date: Dec 2008 Location: Tri-Cities, TN Year: 2003 Make: Ford Model: Edge Flareside Engine: 3.0 V6 Class: 2WD Used For: Taking Me Where Ever I May Roam Posts: 59 Rep Power: 9 iTrader: (0)	Ok, Thank you guys so much for the help! Valvoline 80w-90 will be going in tonight! __________________ 2003 Ford Ranger Edge Reg. Cab Flareside 2wd 3.0 5 Speed 4:10 Limited Slip Mods: 3rd Brake Light To Cargo Light, Tow Hooks, Fabtech AAL, Step Bars Wanted: 06+ Tails, 06+ Corners, Edge Decals, Tint
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