Not only would I not do it but I would be sure to hire a tech who has done several Mustang gear changes. Setting up a performance car involves more precision, a good dial gauge, special fluid and additive. I takes a good tech three or four hours so there is a lot to know.
Best thing to do,is check with anyone ,in your area
,who has had a gear install done and go with a shop recommended.
In my case,I do all my own gear installs and it can take a while to get the proper tooth contact pattern and bearing preloads,just right. It is a bit more difficult than a Ford 9 inch setup.
I just got 3:73's installed the other day parts/labor 495.00 but another 75.00 for new bearing's. idk about how much gears wake up the 01. i ran a 14.28 w/o the gears i got a sct tuner and gears and then ran a 13.96. See if you can find someone who has 4:10's and drive in there car and one with 3:73's. I almost regret not getting 4:10's, but i would be killing myself on the free way if i had those. im at 2000 rpm in 4th gear at 40mph, and 70 is 2200ish. But hey i didnt get much passes so i may have gotten some better times which i hope i can get.
Well, if you were in Omaha I'd tell you where NOT! to go. I have about $500 wrapped up in labor and I still ended up fixing their screw up myself! Make sure you use someone that knows what the heck they are doing and get plenty of testimonials before letting them touch your car.
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