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Old 06-13-2013, 08:57 AM   #1
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Transmission Decision

I am fairly new to owning a Mustang (2 weeks) after buying my first 1998 GT convertible automatic. I was wondering why I got it so cheap to have 127,000 miles on it. Turns out the transmission is at the end of its life (slipping horrible in 1st and 2nd). While I have the chance, I want to improve it. I'm trying to decide weather to buy a kit to change it over to manual or just rebuild the auto and put a shift kit in it. Just looking at the cost of parts, which option would be best for my money? Also, if there is something else that would be better for me to do, please inform me.
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Old 06-13-2013, 09:12 AM   #2
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I would swap it to a stick, but that's just my preference.
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Old 06-13-2013, 09:14 AM   #3
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Quote:
Originally Posted by PoeWalker View Post
I am fairly new to owning a Mustang (2 weeks) after buying my first 1998 GT convertible automatic. I was wondering why I got it so cheap to have 127,000 miles on it. Turns out the transmission is at the end of its life (slipping horrible in 1st and 2nd). While I have the chance, I want to improve it. I'm trying to decide weather to buy a kit to change it over to manual or just rebuild the auto and put a shift kit in it. Just looking at the cost of parts, which option would be best for my money? Also, if there is something else that would be better for me to do, please inform me.
Put an 04 auto in with a j mod, or put a 5 speed. With an auto you won't have to change the computer out. And an 04 is the strongest auto from 96 to 04.
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Old 06-13-2013, 09:20 AM   #4
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Where would be a good place to look into getting an 04 tranny with a j mod?
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Old 06-13-2013, 10:42 AM   #5
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Where would be a good place to look into getting an 04 tranny with a j mod?
All you need is the transmission and you can do the j mod. It will be better than 99% of sticks then

---------- Post added at 11:41 AM ---------- Previous post was at 11:40 AM ----------

You can either get one new or just a junk yard.

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I would swap it to a stick, but that's just my preference.
He would have to change the Ecu and that isn't cheap lol
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Old 06-13-2013, 10:48 AM   #6
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[QUOTE="DSG2003;1687211"]

All you need is the transmission and you can do the j mod. It will be better than 99% of sticks then


How hard is it to do? I looked into the steps and it seems easy, but I have never really messed with automatics before. Also, I seem where you can buy shift kits. Would that do the same thing?
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Old 06-13-2013, 11:02 AM   #7
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Originally Posted by DSG2003 View Post

All you need is the transmission and you can do the j mod. It will be better than 99% of sticks then

---------- Post added at 11:41 AM ---------- Previous post was at 11:40 AM ----------

You can either get one new or just a junk yard.

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He would have to change the Ecu and that isn't cheap lol
Just retune it through bama, that's what I did.
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Old 06-13-2013, 11:13 AM   #8
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Would it be better to just buy a shift kit being that i have no experience with automatics?
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Old 06-13-2013, 11:57 AM   #9
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Would it be better to just buy a shift kit being that i have no experience with automatics?
A j mod is basically a shift kit. It's way cheaper than tuning it. All you have to do is look up how and do it. It's very very easy.
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Old 06-13-2013, 01:19 PM   #10
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Originally Posted by DSG2003 View Post

A j mod is basically a shift kit. It's way cheaper than tuning it. All you have to do is look up how and do it. It's very very easy.
+1
Better than a shift kit actually!
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Old 06-13-2013, 01:26 PM   #11
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Originally Posted by DSG2003 View Post

A j mod is basically a shift kit. It's way cheaper than tuning it. All you have to do is look up how and do it. It's very very easy.
Does the J mod end up being bad for the transmission over time? Like does it just increase the pressure or something?
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Old 06-13-2013, 01:34 PM   #12
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Is the 04 transmission a direct swap for a 99-03 mustang? Like no other mods or tuning other than the tranny?
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Old 06-13-2013, 04:32 PM   #13
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Does the J mod end up being bad for the transmission over time? Like does it just increase the pressure or something?
The j mod helps longevity of the transmission and makes everything work better and shift stronger

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Is the 04 transmission a direct swap for a 99-03 mustang? Like no other mods or tuning other than the tranny?
If you already have an auto it should be a direct swap
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Old 06-13-2013, 04:47 PM   #14
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If you don't have all the equipment (transmission jack, 4 jack stands, etc.) Id shop around at some transmission shops for estimates to do the removal and replacement of your trans. That way you can get an idea of how much grief that you want to go through to save a few dollars...
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