I had Ford racing 3.73 gears put in my mustang

[bud4au]

it is an 2006 gt auto. i picked it up last night and noticed a low tone moaning noise when i would let off the gas at 40-50 mph. as soon as i touch the gas, it goes away. I let it slow down on its own , and the slower it got the less i heard it. I also noticed when i put it into drive it was more aggressive to go. Is any of this normal?

 

[gmantheman]

That does not sound normal. Did you get ford racing 3.73? The part number would end in A. Hopefully other people will chime in but if I were to guess, I would say you need to add more friction modifier.

 

[bud4au]

yes

it's all ford racing parts

 

[SpartaPerformance]

Not normal, imperfect install of the ring & pinion

 

[bdcardinal]

there should be no noise, the person that did the install did not do it correctly.

 

[Tanus]

improperly installed

 

[Zora]

Bad install...hope they fix it for you.

 

[mjk]

wow, that sucks. I have the same issue with 4.10s

 

[DMSIA07GT/CS]

NOISE

did you recalibrate your trannie with a tuner? You didn"t discribe where noise was coming from, could be tranie downshifting with deceleration. The first thing I noticed with 4.10 gears after tuning was the difference in shift points and the auto downshifting it did.