LordBritish

I may be getting a Motive 3.90 Ring & Pinion set for my automatic 05 GT.

The reason I'm getting Motive is because Ford does not make a 3.90 gear.

I've heard from a mechanic that some non Ford gears don't fit well, make noise, wear out quickly, etc.

I certainly don't want that !!

Can anyone reccomend Motive gears?

I also need to get some gear oil - how many quarts do I need?

I heard I need synthetic 75W-140 gear oil.
How many quarts of gear oil do I need ??

O5GT

motive gears rock

and alot of Big boys run them

LordBritish

Excellent, Motive it'll be.

Now how many quarts of gear oil do I need?

I guess I need the friction modifier as well.

Anything else I would need.

I'll be taking it to a shop.

The Boss Hog

LordBritish,
When I asked Steeda about installing Motive 3.90 gears they told me I would have to sign a release so they would not be responsible for excessive gear whine. If I would go with the Ford 3.73 or 4.10 gears, I would not have to sign a release. Doesn't prove anything but just something to consider.

The Boss Hog . . . . . . . .

2005RedGT

I have motive 4:10 - no whine, installed easy and work great.

-Bryan

O5GT

wonder who makes fords gears

LordBritish

It appears that Motive gears are fine The installation probably makes all the difference.

subzero05

Lordbritish~ let me know how these work out for you..I want to do the motive 3.90's as well but nobody seemed to have much info on them.I will definately order them if yours work out well.Oh, Richmond makes the Ford gears.

Is there a specific shim kit or something that is needed to install these?..Want to make sure I order all the correct parts for install, so if anybody knows specifics please chime in..Thanks for the part # on the street set Blazing saddles!