Stock Gear Ratio...

[PhLoBuS]

What is the stock gear ratio of a 1990 Mustang GT?
I called to have my gears swapped at a place because I want to put my 4.10s in (its an AOD) and he asked me for the gcode and my current gear ratio.

 

[super302]

either 3.08 or 2.73
Check the door tag and see what letter it says for differential

 

[super302]

if it says Z then it has 3.08's, something else than it is prob. 2.73's
??Did any foxes(non-cobra) come with 3.27's

 

[Thomas302]

Look at the tag on your rear end cover. It will say something like 2L73, or 3L08. They did also put 3.27 in the rear too. My friends 89 gt with an auto had them.

 

[PhLoBuS]

Yeah I read that 3.27 is in AOD 1990 GT's

 

[DTT92LX]

3.27s in my '92 lx. Check the metal tag on the rear end cover...

 

[PhLoBuS]

Okay going to go check it! I will let you know!

 

[5spd GT]

I would have went with 373's on your auto because the 410's seem to outrun the higher rpm flow in the 5.0...either way you get a good SOTP feel...

Yes...some autos came with 327's...

My auto (converted to a 5spd)...had 273's in it stock...

 

[PhLoBuS]

It read
201A which is not the gear ratios
3A88880 which means its probably 3.08 gears =]

 

[Thomas302]

Nether one of those numbers are the gear ratio. It should be the top number near the bolt. The bolt might cover a little of the first number, but there is a code that reads 2L73, or 3L08, keep looking. Or just jack up the rear and count the tire rotation to the drive shaft rotation, ie 1 turn of the tire for every 2.73 turns of the drive shaft.