Author Topic: Posi Differential help  (Read 3480 times)

cerider43

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Posi Differential help
« on: August 24, 2010, 07:23:25 PM »
Hi I need help On my 1994 Mustang Gt. currently i have a stock differential and I want to switch it to a Posi as well as adding 420 gears. does anyone have advice how to do this step by step I really appreciate it

ol dirty doug

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Re: Posi Differential help
« Reply #1 on: August 25, 2010, 02:24:48 PM »
the gt should have a stock 8.8 posi unit in it from the factory. 4.10 gears is the way to go, i have not seen 4.20 gears and im sure they are 3 times more expensive due to the odd ratio.

Soaring

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Re: Posi Differential help
« Reply #2 on: August 25, 2010, 03:13:02 PM »
Yeah, I've never heard of 4:20 gears either. 

cerider43

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Re: Posi Differential help
« Reply #3 on: August 25, 2010, 05:37:42 PM »
it has the limited slip diff. and sorry about that i did meant 4.10 gears. so it's just the same as a posi unit?

ol dirty doug

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Re: Posi Differential help
« Reply #4 on: August 25, 2010, 08:06:40 PM »
ya if it slips just replace the springs and clutchs fairly easy if you are ok with tools

Soaring

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Re: Posi Differential help
« Reply #5 on: August 25, 2010, 10:22:02 PM »
Limited slip is Ford's way of saying posi traction.  Chevy uses the term posi tractiion.  If stuck in mud, one wheel will continue to pull even if the other one is stuck or off the ground. 

cerider43

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Re: Posi Differential help
« Reply #6 on: August 26, 2010, 11:39:45 AM »
thanks these advices really help. any more suggests you guys recommend. to actually get my horse power down to the wheels?

Soaring

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Re: Posi Differential help
« Reply #7 on: August 26, 2010, 02:23:37 PM »
What mods do you already have on it?

cerider43

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Re: Posi Differential help
« Reply #8 on: August 26, 2010, 03:29:43 PM »
bbk long tube headers with a x pipe, bbk intake forgot the suspension brand but it's lowered. i think that's about it. the previous owner took off the ac for lighter car? i have no idea why?

Soaring

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Re: Posi Differential help
« Reply #9 on: August 26, 2010, 06:08:14 PM »
Taking off the compressor for a street  car like you have won't make it faster for the street at WOT.  If you want AC, then get a Sanden compressor and have an AC mechanic install it. 

cerider43

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Re: Posi Differential help
« Reply #10 on: August 26, 2010, 07:06:13 PM »
yeah i thought so too, yeah im sure i'm going to do that the ac you need it sometimes.

Jeff73Mach1

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Re: Posi Differential help
« Reply #11 on: August 28, 2010, 01:04:47 AM »
simplest way to get your tires to hook up is to get sticky drag radials and run the pressure lower than you would for the street.

A pair of Mickey Thompson Drag radials will give you a much better launch for about 3-400 bucks or less if you can find some slightly used ones.

There are a ton of suspension mods you can do, but you have to have good tires if you really want to hook up

cerider43

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Re: Posi Differential help
« Reply #12 on: August 29, 2010, 11:56:11 AM »
thanks i will look into that and see what I can find

 

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