98GT Mustang

ive got 3.73s going in right now and they will be finished tomorrow.....i was wondering if i should be easy on them and wear them in like that or just drive like i always do....and what is the calculation to convert from 2.73s to 3.73s for ur speedo...ive seen a way to do it on here but cant find it anymore ...thanks in advance

pete1665

same question here. my 3.73's will be done in a few hours. I'll let you know what my installer says.

jdaniel

Its good to heat cycle them for a bit then let them cool down and heat cycle them again. After a couple days of doing this then you are safe to play.

Dan04COBRA

3 heat cycles in one day, drive for about 10 minutes at normal operating speeds. Let cool for 30 mins, do the same a couple times and then it's ready for massive amounts of abuse.

PipsBlackStang

Hey 98GT Mustang and pete1665 will you both please record your 70 mph rpm's for me? I have a 96 GT and am not sure if I have stock gears in my car. The guy I bought it from had no idea what had been done to the car, he just purchased it from his newphew who was in need of some cash. If you could please get those #'s for me I would greatly appreciate it.

Dave2000GT

I broke my 4.10's in by doing multiple burnouts complete w/power shift to 2nd.

ZW99GT

I got my gears used out of a old wrecked fox body. I hoped that he did all that heat and cooling crap, and i just romped on it as sonn as i pulled out of the shop parking lot. I guess thats different cuz they were used.

sandcracker21

i have a question to pose to you all.....

if my friends rmps onhis 01GT are at 2100 at 70 on the highway with auto trany,

then what gears does he have?

DIVER8374

He has the stock 2.73 gears in it, That is where mine is at at 70 also. If he had 4.10 he would be around 2800 rpm's and around 2600 rpm's with 3.73

03GTType

The stock gears for a 01 GT aren't 2.73's they are 3.27's... [&:]