FRPP rear end fluid fill question?

[mr. anderson]

I installed the FRPP rear end girdle M-4033-G2, and was wondering how much fluid needs to go in the rear, I have put 4 quarts of 75-140 in it and it still isn't up to the fill plug like the instructions says to fill it to. WTF?

 

[stkjock]

Factory fill is 2 qts and 4oz of mollifier.

Of course a 30 second search would given you this answer.

 

[mr. anderson]

huh, interesting, that's what I get for reading the instructions. Checking on a couple of the forum vendor websites that sell the part and they all say 3 quarts with this cover. oh well, at least draining a quart will be easy.

 

[YoungPony]

Do you have the rear end level and are you filling it from the hole in the girdle cover or the hole by the drive shaft? As stated above it takes about 2 quarts to fill stock

 

[Rob72]

Checking on a couple of the forum vendor websites that sell the part and they all say 3 quarts with this cover.

Chilton says 4.25 pints & the service manual says to fill to the bottom of the filler hole while on a level surface.

http://westprecisiontool.com/FILES/GT/driveline lubes.pdf

I'm very interested in the solution since I'm going to buy that cover in the future.

 

[mr. anderson]

3 quarts of fluid, I drained 1 out. didn't know about the forward fill port. now I do

 

[BadHabit2Break]

3 quarts of fluid, I drained 1 out. didn't know about the forward fill port. now I do

you did add the bottle of friction modifier?

 

[Rob72]

3 quarts of fluid, I drained 1 out. didn't know about the forward fill port. now I do

Are you saying that the factory fill port is lower to the ground than the fill port on the new differential cover?

 

[mr. anderson]

yes, very much so. I used amsoil 75w140, plus the ford friction modifier, I know amsoil says it's not needed, but I added it anyway,

Are you saying that the factory fill port is lower to the ground than the fill port on the new differential cover?

 

[Rob72]

yes, very much so.

I can understand how that could be confusing. Sounds like a bad design.

 

[OneQwkStang]

It will hold a little more fluid using that girdle...but regardless remove the front fill plug on the drivers side of the diff...fill it until you can reach your pinky finger in and touch fluid with a slight bend in the finger. Any more and it will piss out the vent on the passenger side axle tube vent.