3.73 or 4.10 gears?

[Jerseyfury2]

Hey all, I have a v6 automatic mustang that's completely stock. I'm going to throw an intake on it soon and eventually exhaust, charger, blah blah blah you know the deal. I was wondering do you think i should throw 3.73 gears or 4.10 gears on it. It's my street car and daily drive. I do a bunch of highway driving....60-80mph pretty daily, while commuting. And if I were to get a set of gears, how difficult is the install? -Mike

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[Black Stang 3200492]

im also wondering the same thing, can u install them ur selfs.

[FastLane034]

Unless you're a mechanic with a lift or extremely skilled, you cannot install yourself. Theres SO many things that can go wrong when trying to do gear swaps. Usually it costs more than the gears themselves to have them installed. Correct me if I am wrong!

[Puerto Rico 4.6]

yep fastlane pretty much summerized it. And if you install them incorrectly by the time you figure it out they would be ruined. My car is an auto i got 3.73s on right now ....but the 410 is in my garage waiting to be installed. My mechanic installed the 3.73 like he always does on other stangs (mostly gts with the 8.8 rear) by ear and feel . They were perfect and quiet for 5-6 months then they gradually started whinning ...more and more..until i grew tired and orderd the 4.10s. ANother shop is going to install them now and they are going to actually use the correct tools to measure backlash and all that stuff. If you drive daily at 80 over long periods of time get the 3.73. If most of your driving is city , with little highway, get the 4.10s...you will like em more. Hope this helps

[tomsa55]

I'd go with the 3.73's, plus a ford t-lock or other limited slip differential. You'll be driving daily, and the 3.73's will give you really good drivability on the street. with out the higher rpms crusing on the hiway. If you check around, local mustang club might be able to reccomned a drive train shop to do the install. I went with the ford dealership, they gave me ford repair warrenty on the setup. If you do go with ford shop, have them order the parts, price is almost the same, but you'll get life time warrenty. Ford factory rep says that this is a solid setup on ford ranger tucks, and will be just fine on the mustang platform. You will need a turner to adjust your speedo. The gears were kind of noisy at first, but after about 2k miles, they quited down some. I would also recomment having the lower control arms replaced, and a strut tower brace and lower a-arm brace installed. BMR's agood supplier and these bolt ons will improve your handling and drivablity.

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Have fun and drive safe.

[Puerto Rico 4.6]

tomsra your car and mine have pretty much the same mods ..good choice on the tunes AAP

[ilduce321]

I do a lot of highway driving too, constantly 65-75mph...so are you guys saying 3.73 gears would be better for someone who does a lot of highway driving vs. 4.10s?

[DragonPL]

I read that 3.73 are better for manuals and 4.10 for automatics...I got a manual and I do alot of driving: highway and city, so will 3.73 will be better for me???

[Puerto Rico 4.6]

if u are really into performance ...visit the track a lot or are looking for everybit that helps in the prformance department...you can still get away with 4 10 s in th highway.....if not get the 373s.

[ilduce321]

What replacement LCAs would you guys recommend?