hey all i recently bought a 1990 stang LX about a month ago..the guy said it had stock gears......i was just wondering what they were...i am looking to upgrade to 3.73 but i am just curious what the stock ones are....and also....the car has over100k , do u think i need to do anything before putting the new gears on like a major tune up or something? all help is highly appreciated.........thanks in advance

 

I've got 90,000 miles and I just had my rear end rebuilt just for the hell of it and 3.90 gears put it. I'd buy a bearing kit and axle bearings just for the hell of it and have them all replaced.

 

stock gears are like 3.08s or 2.73s and something else for autos.

 

2.73s, and 3.27s for autos.