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Old 05-24-2012, 01:47 PM   #1
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gears question

Hey guys and gals,

I am wanting to get some 3.90s as a bday present to myself, as I keep getting yelled at for having certain mods and have yet to pull the trigger on gears.

my question to you all is this - what all do I need to buy to make it handle the following -

I drive maybe 10 miles one way to and from work, no freeways

I will occasionally take a freeway from here and there

I have recently fallen in love with the drag strip

i have the following mods
-stage 2 cams
-tune for 93 oct
-suspension
-315s on the rear
-short throw

summers list includes
-tb/plenum
-nitrous

so with that my question is asked... what all is needed to purchase while im in there gutting the diff anyways.

thanks!
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Old 05-24-2012, 01:54 PM   #2
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If you dot have one already a T-lok, or at least that's my guess.
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Old 05-24-2012, 02:00 PM   #3
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Re: gears question

thats what I have, I guess i should have mentioned whats in my cart on AM already..

i have the following:
3.90s
tlok
install kit
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Old 05-24-2012, 02:01 PM   #4
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You don't need a T-Lok, install and rebuild kit will do the trick.
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Old 05-24-2012, 02:03 PM   #5
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Re: gears question

Quote:
Originally Posted by deadsp0t View Post
You don't need a T-Lok, install and rebuild kit will do the trick.
+1, if all this is going to a GT then you don't need to buy a T-Lok
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Old 05-24-2012, 02:05 PM   #6
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Now would be a good time to do the axels as they have to come loose anyway, if so do the C-clip eliminators as well. A good diff cover too, one that pre-loads.
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Old 05-24-2012, 03:19 PM   #7
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Quote:
Originally Posted by Topless04GT
Hey guys and gals,

I am wanting to get some 3.90s as a bday present to myself, as I keep getting yelled at for having certain mods and have yet to pull the trigger on gears.

my question to you all is this - what all do I need to buy to make it handle the following -

I drive maybe 10 miles one way to and from work, no freeways

I will occasionally take a freeway from here and there

I have recently fallen in love with the drag strip

i have the following mods
-stage 2 cams
-tune for 93 oct
-suspension
-315s on the rear
-short throw

summers list includes
-tb/plenum
-nitrous

so with that my question is asked... what all is needed to purchase while im in there gutting the diff anyways.

thanks!
Get rear gears 4.11
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Old 05-24-2012, 04:30 PM   #8
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Re: gears question

I thought about 4.10s but everyone said go with 3.73s so I figured this would be the happy medium
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Old 05-24-2012, 04:32 PM   #9
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Quote:
Originally Posted by Topless04GT
I thought about 4.10s but everyone said go with 3.73s so I figured this would be the happy medium
I have 3.73 and my dad said if I want it faster though the gears I want 4.11
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Old 05-24-2012, 06:28 PM   #10
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Quote:
Originally Posted by deadsp0t
Now would be a good time to do the axels as they have to come loose anyway, if so do the C-clip eliminators as well. A good diff cover too, one that pre-loads.
What do you mean by one that preloads?
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Old 05-24-2012, 07:28 PM   #11
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Quote:
Originally Posted by 2002VertGT

What do you mean by one that preloads?
http://blogs.musclemustangfastfords....ver/index.html

Look down the left side, pre load is for the main. Caps.
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Old 05-24-2012, 08:17 PM   #12
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Quote:
Originally Posted by deadsp0t

http://blogs.musclemustangfastfords....ver/index.html

Look down the left side, pre load is for the main. Caps.
Ok I still don't understand what it means...I see that the cap there is meant to withstand a lot of hp....just don't understand what the preload means or what it does..

Please pardon my ignorance on this subject
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Old 05-24-2012, 10:07 PM   #13
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Quote:
Originally Posted by deadsp0t
You don't need a T-Lok, install and rebuild kit will do the trick.
+1

---------- Post added at 11:07 PM ---------- Previous post was at 10:44 PM ----------

I'd prolly put new wheel bearings on it too.
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Old 05-26-2012, 12:10 AM   #14
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http://www.carcraft.com/techarticles...d/viewall.html

I personally can not explain how it does what it does and did not see much out there explaining in detail.. SlowStang or Trojan or DreamStang may be able too though.
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Old 05-26-2012, 05:25 AM   #15
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I would go big with 4.10s since you only drive 20miles a day city. That's the same as me and I have 4.10s. Go big! Don't fear the gear!!

Your cart should have the gear of your choice(4.10 hopefully), an install kit, bearing rebuild kit, and also 3 bottles of 75-90(I think) gear oil. That will be everything you need.
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Old 05-26-2012, 07:28 AM   #16
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Quote:
Originally Posted by ColeJohnson
I would go big with 4.10s since you only drive 20miles a day city. That's the same as me and I have 4.10s. Go big! Don't fear the gear!!

Your cart should have the gear of your choice(4.10 hopefully), an install kit, bearing rebuild kit, and also 3 bottles of 75-90(I think) gear oil. That will be everything you need.
...and the Ford friction modifier
http://www.amazon.com/Ford-CM19546A1.../dp/B000DZR55U
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Old 05-26-2012, 12:16 PM   #17
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Go 4.10 gears they are soo much better you won't regret it at all! If you love dragstip's then I highly suggest 4.10 all the way no doubt. I also upgraded my axles to moser 31 splined axle and 31 spline posi differential. Cause you'll need all the traction you can get I paid 140 for installation got a good deal..

---------- Post added at 12:16 PM ---------- Previous post was at 12:14 PM ----------

Then you get slicks dropped my 60 foot time from 2.2 to 1.7
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Old 06-08-2012, 09:13 AM   #18
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What's recommended brand on gears I'm pretty convinced with 3:73 gears but Idk if there is a good brand
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Old 06-08-2012, 10:35 AM   #19
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Quote:
Originally Posted by 04Mstng.GT
What's recommended brand on gears I'm pretty convinced with 3:73 gears but Idk if there is a good brand
Can't go wrong with frpp
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Old 06-08-2012, 10:36 AM   #20
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Where can I find those?
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Old 06-08-2012, 10:37 AM   #21
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Originally Posted by 04Mstng.GT
Where can I find those?
American muscle

http://www.americanmuscle.com/ford-373-9904gt.html
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Old 06-08-2012, 10:43 AM   #22
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Quote:
Originally Posted by 2002VertGT

Can't go wrong with frpp
+1
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Old 06-08-2012, 11:10 AM   #23
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Do I Get installation and bearing kit or just installation kit? With the gears
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Old 06-08-2012, 11:27 AM   #24
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Quote:
Originally Posted by 04Mstng.GT
Do I Get installation and bearing kit or just installation kit? With the gears
The $179 is just gears....it's recommended that you get the instal kit as well
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Old 06-16-2012, 12:24 AM   #25
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Re: gears question

Quote:
Originally Posted by Topless04GT View Post
Hey guys and gals,

I am wanting to get some 3.90s as a bday present to myself, as I keep getting yelled at for having certain mods and have yet to pull the trigger on gears.

my question to you all is this - what all do I need to buy to make it handle the following -

I drive maybe 10 miles one way to and from work, no freeways

I will occasionally take a freeway from here and there

I have recently fallen in love with the drag strip

i have the following mods
-stage 2 cams
-tune for 93 oct
-suspension
-315s on the rear
-short throw

summers list includes
-tb/plenum
-nitrous

so with that my question is asked... what all is needed to purchase while im in there gutting the diff anyways.

thanks!
You'll need the bearing kit for the particular rear end that you have with the gears. I'm having 3.90s installed right now and that's all I needed. That and gear oil.
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Old 06-18-2012, 02:09 AM   #26
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Originally Posted by Cobraman8801

You'll need the bearing kit for the particular rear end that you have with the gears. I'm having 3.90s installed right now and that's all I needed. That and gear oil.
So let me get this straight? Because I want to do the 4.10 swap myself, so I need to know what I need besides just the ring and pinion... So just an install kit, and oil too right?
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Old 06-18-2012, 03:38 AM   #27
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Quote:
Originally Posted by Topless04GT
Hey guys and gals,

I am wanting to get some 3.90s as a bday present to myself, as I keep getting yelled at for having certain mods and have yet to pull the trigger on gears.

my question to you all is this - what all do I need to buy to make it handle the following -

I drive maybe 10 miles one way to and from work, no freeways

I will occasionally take a freeway from here and there

I have recently fallen in love with the drag strip

i have the following mods
-stage 2 cams
-tune for 93 oct
-suspension
-315s on the rear
-short throw

summers list includes
-tb/plenum
-nitrous

so with that my question is asked... what all is needed to purchase while im in there gutting the diff anyways.

thanks!
Little advice. Everytime you head to the track make sure you have means of getting the car home when you break the axles or gears (if not installed right) I ran the exact same setup up and only got 1 run in before the rear end exploded. There's 1 inch of axle missin from the driver side cause it couldn't take the pressure from a 5k launch when I was assured they could. 18psi in the tires and fully RACE not drag suspension. What times have you run in your car.

---------- Post added at 08:38 AM ---------- Previous post was at 08:34 AM ----------

Quote:
Originally Posted by Mathew r Wright

So let me get this straight? Because I want to do the 4.10 swap myself, so I need to know what I need besides just the ring and pinion... So just an install kit, and oil too right?
Better know what your doing when it comes to gears. It's not the whine you should be worried about. It's the breaking factor. The previous owner of my car had gears installed professionally and they obviously didn't do it right cause it broke the outside ends of the teeth off on the ring which means the pinion was set back to far and it wasn't making enough contact on the ring for fully strength.
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Old 06-18-2012, 03:24 PM   #28
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Quote:
Originally Posted by Mathew r Wright

So let me get this straight? Because I want to do the 4.10 swap myself, so I need to know what I need besides just the ring and pinion... So just an install kit, and oil too right?
You also need the tools to do it. But yes that's what you need parts-wise.
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Old 06-19-2012, 12:12 AM   #29
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Originally Posted by t0t4lbl4ck0ut

Little advice. Everytime you head to the track make sure you have means of getting the car home when you break the axles or gears (if not installed right) I ran the exact same setup up and only got 1 run in before the rear end exploded. There's 1 inch of axle missin from the driver side cause it couldn't take the pressure from a 5k launch when I was assured they could. 18psi in the tires and fully RACE not drag suspension. What times have you run in your car.

---------- Post added at 08:38 AM ---------- Previous post was at 08:34 AM ----------



Better know what your doing when it comes to gears. It's not the whine you should be worried about. It's the breaking factor. The previous owner of my car had gears installed professionally and they obviously didn't do it right cause it broke the outside ends of the teeth off on the ring which means the pinion was set back to far and it wasn't making enough contact on the ring for fully strength.
Well that's what ya call settin your backlash, so the pinion meets the ring right? And it's not gonna see track probably for a long time, so you guys think I can handle it?
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Old 06-22-2012, 04:47 PM   #30
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Quote:
Originally Posted by deadsp0t
Now would be a good time to do the axels as they have to come loose anyway, if so do the C-clip eliminators as well. A good diff cover too, one that pre-loads.
I know what the c clips are. It not the eliminator. Didn't know there was one. Bel please. Is this on AM?
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