yamaha537

does anyone know what the stock gears are in a 1989 mustang gt. its a 5.0 5spd if that helps any. im looking to get 3.73 just wanted to know whats in there now. thanks

camaroeater

The gears are different year to year. Do a search on how to translate the codes on the door tag. There is a code on the tag that will specify gear ratio.

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88 GT - Mac CAI, BBK Shorty's, BBK O/R H-pipe
Magnaflows, Smog/EGR Delete, Timing @ 14*

yamaha537

thats true. i didnt think of that. thanks

silver91gt

tags arent always accurate though, it is most likely a 2.73.
mine had the 3.08 tag on it, but they were 2.73.

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novi powered 347 11.6@121mph
with a little spray 10.7@130mph

silver91gt

after you jack up the rear and support it with jackstands put the trans in neutral. Make a mark on the driveshaft, mark the tire, and count how many times the driveshaft turns vs 1 full turn of the tire, this will give you your ratio.

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novi powered 347 11.6@121mph
with a little spray 10.7@130mph

nitrous_bob

door tag "ax" code

m= 2.73
z=3.08
e=3.27 (aod avail only)

i prefer 4.10's myself... but thats just my opinion based on 4 cars.... 2 had 3.73, 2 had 4.10

i'll never use anything but 4.10

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'93 calypso notch 6th stang and counting



nitrous oxide is proof there is a GOD and he wants us to be happy

http://www.myspace.com/nitrous_bob

yamaha537

alright thanks for your input guys. i didnt know that you could do that. what was hte benifit of the 4.10's i was thinking about that but i didnt want to loose to much top end. idk i have to look into them more so i can make my decision.

stang8689

4.10 will get you off the line quick and still not tach too high on the highway. I have 3.73's and I would rather have 4.10's

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89 2.3 Turbo, 82 T-Top Notch 5.0, 86 LX T-Top 5.0 roller and 86 GT Black in and out with Gt 40X Heads, Smoothed Engine Bay, Battery in Trunk, SLP's, Bolt-on's

Stevens91gt

i have an aod and i love my 4.10's
stock it came with 2.73's and it was horrible

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302army187

ditto

car came with 2.73's, now have 4.10s LOVE THEM 18.5mpg also

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1989 302 LX vert; ported heads, intake, lots of bolt-ons, 4.10's, NX 100 wet-shot *old times 16.33 new time with 50shot 14.28!* (5900ft elevation track)