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post #1 of 7 (permalink) Old 12-12-01, 05:42 PM Thread Starter
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Join Date: Dec 2001
Location: P-Town IN
Age: 31
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Question ATX-MTX swap?How Hard?

Alll righty fellas , if anyone knows what parts I need and How hard this would be, I NEED TO KNOW, cuz my ATX went out and I am kinda screwed until I get a new tranny or swap out the slushbox for a MTX. Also if anyone knows the approximate cost, I would greatly appreciate it. Also, would it be cheaper to get a new ATX or swap for the MTX.


ATX-MTX swap?coming soon?

I wish my Probe wasn't broken.
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post #2 of 7 (permalink) Old 12-12-01, 10:52 PM
Hardcore GL Tuner
Join Date: Apr 2001
Location: NEWWWARK, Cali
Age: 35
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Lightbulb I can't be too much help, but...

There are a few who have done it, but to give you the quick answer i'd have to say it'll cost you anywhere between 500 and 1500, you will need the linkages, clutch cyls, clutch pedal cage(you can just put in the clutch pedal, but it's not recommended, getting the whole cage is better), 5spd tranny, 5spd flywheel, clutch/pressure plate/shifter assembly, etc. You can buy a fidanza lightened flywheel from daprobe if you'd like for about 250 if you have a GL, they're no longer made for them and he has the last few. Good luck:) I plan to do the same, but am going to buy a beater first, hmmm maybe a honda civic

White '91 PGL ATX someday i'll convert to MTX, really:)
RActive Heat shielded cone, Pacesetter Header, Random Tech Cat, Dynomax SuperTurbo, Jacobs Ignition, Removed AC System, 17X7 wheels w/ Dayton ZR's...
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post #3 of 7 (permalink) Old 12-13-01, 01:01 AM
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Location: North Cackalack
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I can get you the lightweight Fidanza flywheel if you want. I have it installed on my car and Mike bought one from me back in July, as did a couple other people. They are very high quality. I can get it delivered to your door for $220 via FedEx. It will be there in a week to two weeks (normally these things cost $400+). If you need it shipped faster, we can work out the shipping costs offline. Send me a PM or an email if you are interested. For more info on the flywheel, check out Fidanza's webpage

I think I have my old clutch sitting around at my parent's house. It has 90,000 miles on it, but it still grabbed nicely and never slipped, the pressure plate was worn down from the pilot bearing, so I think threw it out. I know I have my old flywheel still. It's heavier than hell, but you can buy that from me for $50 + shipping. I resurfaced it by hand so it should be good to go, but you may want to get it resurfaced.

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post #4 of 7 (permalink) Old 12-14-01, 11:28 PM
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Location: Trier, Germany
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i wouldn't think this would cost you more than 500 if you get all the parts ahead of time and do all the work yourself. it sure as hell would be worth the headache though. you can get a new stock clutch from for like 100 if i remember right. good luck! and if you need any help finding parts, just send me a PM and i'll should be able to get you what you need at a reasonable price. :rcool:

Stefan, Co-Founder NMPOC

Gunmetal Gray 91 Probe GT
May the boost be with you!!!
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post #5 of 7 (permalink) Old 12-20-01, 10:44 PM
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Join Date: Sep 2001
Location: Michigan
Age: 35
Posts: 77
Well.. lets see..

In terms of reliability.. MTX's aren't much better and repair parts are harder to find.

In terms of FUN!.. the Swap is definately worth it!

I'm actually in the process of swapping my GL back to ATX though.. in leiu of bigger better things to come... In other words a GT with an ATX... which I am going to swap to a MTX with the GT tranny that I swapped my GL with 9 months ago...

That's a mouthful.. needless to say though.. I know my stuff by now (this will be the 11th time my GL has been tranny-less)

Questions are welcome..

Too many cars!!!

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post #6 of 7 (permalink) Old 12-23-01, 12:21 AM
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i don't know about you, but i am at 170k on the stock clutch and tranny! but i do admit that my speed gear in the tranny resently broke!

Stefan, Co-Founder NMPOC

Gunmetal Gray 91 Probe GT
May the boost be with you!!!
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post #7 of 7 (permalink) Old 12-23-01, 09:45 PM
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Location: Utah
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This is a link ot my documentation for wiring all accessories up(such as cc and the ECU and the starter interlock) I didn't write everything down that is required for the swap, but it sounds like everything was covered. Also, when you get the tranny, remember to get that center axles (that goes to the right CV axle) these ARE different in all formats (GT, auto/ man, and GL auto/ man; basically there are 4 different axles here)
Actually, I just looked at my page, and only the starter interlock is described. This will give you whjat to do to start and use the car, but the cc and ECU will be short 2 inputs. Basically, the cc won't kick out when the clutch is pressed in, and the ECU has a special circuit that tells the ECU when the clutch was pressed, or the tranny dropped in neutral, to allow the ECU to prepare for the idle mapping so the car won't stall. I will update and create the pages to describe these circuits.
As for the swap, it is basically a pull-out put in affair. If you're good, you could probably have the car running in a weekend. If you also plan to upgrade to the GT tranny, the shift linkages are again different, get that off the GT, and ALL axles are different, as well as the brake spindles. You can use your GL brake rotors and calipers, however. Remember to get the flywheel for the proper tranny. GL trannies use a 7 or 8 inch clutch disc(I forget what size), and GT's use a 9-9.5" clutch disc, and will bump the starter out just enough to accomodate.
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