Fox Diff, T5 and Brake fluid

[Mindseye007]

How often should you change your Differential fluid I have the OEM Traction Lock 8.8 with 4:10's.
T5 fluid I have the Z-Spec and brake fluid on a foxbody and what are the best fluids to change them with?

 

[Noobz347]

Do you have the OEM Traction Lock?

 

[Mindseye007]

Do you have the OEM Traction Lock?

yes it the 8.8 OEM Traction Loc... what is better

Torsen T-2R torque-bias differential, High Bias, Ford 8.8” differential or​

The FORD 8.8 OEM TRAC LOCK POSI UNIT 31 SPLINE
W/ "S" SPRING & CARBON FIBER CLUTCH PACKS?

 

[Noobz347]

For the street? The traction lock does very well.

Here's a thread on the fluids folks are using: https://stangnet.com/mustang-forums/threads/8-8-axle-gear-oil-and-modifier-question.916297/

 

[Mindseye007]

For the street? The traction lock does very well.

Here's a thread on the fluids folks are using: https://stangnet.com/mustang-forums/threads/8-8-axle-gear-oil-and-modifier-question.916297/

is it better to run 31 Spline or 28 Spline Axles ?

 

[Noobz347]

is it better to run 31 Spline or 28 Spline Axles ?

How much torque do make and what tires do you run? The 28 spline will take a [lot] of abuse. Dudes run blower setups and slicks on 28 spline setups every day.

 

[Mustang5L5]

I probably change my fluids too often, but it gives me something to do in the winter.

I use Mobil 1 gear oil, no friction modifier. 75W-140 in the diff.
In the T-5, i run Mobil 1 Mercon V ATF.
For Brake FLuid, i run the Valvoline Synthetic Dot 4.
Engine oil is Mobil 1 Synthetic
Ford Type F for power steering

 

[limp]

If your replacing everything new, there is usually NO price difference ( or just a few dollars ) between 28 spline vs 31 spline..... Kind of a why not deal??