Quick gear and auto question.

[paintballpyro1]

I have a 96 gt with the auto trans. Im looking at buying a whole rear-end with 4:10 gears(ford motor sports) w/ rear girdle for $300 hasnt been driven on. 1st does that sound like a good deal? Also i was reading that it will/can cause damage to the trans which i cannot afford to roast another one. Will a speed cal fix that problem(know it fixes speed/odo)

 

[04YELLOWGT]

Are you talking axles and all? If so I would be careful because that is too cheap.

Also it won't hurt your trans it will just throw off your speedo. A speed cal doesn't work for an auto you will need to get an SCT Tuner.

 

[paintballpyro1]

Yea it is complete minus brakes. He said gear were 200, girdle was 200 and the carrier was close to 400. It looked like it was a project car and just funds ran out and now he is parting out. I asked about it alittle more so we will see what he says.

Anyway yea i was reading by changing the gears it changes the shift points and can damage it. I have been looking at the sniper special force, would that work for the gears and shift points?

 

[Flghtmstr1]

The shift points don't change; they are RPM-triggered not MPH triggered. I drove my car after getting gears put in without a tune to compensate, and it shifted the same. The only difference was that my speedo read high.

 

[paintballpyro1]

Well i ended up getting the sniper tuner anyways cause you do a couple other things that i have on my car. Should i raise the rpms that it shifts at with the new gears or just leave it?

 

[04YELLOWGT]

Leave it. Just change the gear ratio to 4.10s to get your speedo correct.

 

[paintballpyro1]

sounds good then. This is really my first swap and will be first geared car. What weight fluid should i use?(i know i need friction modifier also). I kinda searched and people said 80-90, 75-90 or synthetic 70w-140. What would be best for it sense it has no miles on it. O and i cant find my haynes manual but how much does it take?