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Transmission Model/Type

Old 06-28-2018, 02:51 PM
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FL Transmission Model/Type

Hey, my 2004 Rx8 has had a code reading Torque converter Clutch solenoid, I cant Seem to find said solenoid anywhere, even called a few Mazda dealers and they donít carry them. Can anyone help me out on what transmission model my car has so I can Look it up that way? Itís a 2004 Automatic Transmission (4-speed).
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Old 06-28-2018, 03:18 PM
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I was going to be a smart-***, but im feeling sympathetic because I was once a noob and also once owned a 4 port 4 speed autotragic.


The 4 speed automatic transmissions aren't hardly worth much of anything because well, nobody wants an automatic rx8 for the most part. that said, you may be better off buying a whole used 4 speed automatic transmission
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Old 06-28-2018, 05:23 PM
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Xero Ryuu that’s not the point lmao, my point is I need To find out what model the transmission is, so I can Have my local Mazda dealer find me the part, and I kind Of have to have an auto due to only having one foot to drive...
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Old 06-28-2018, 06:16 PM
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Originally Posted by Zer0T0lerant View Post
Xero Ryuu that’s not the point lmao, my point is I need To find out what model the transmission is, so I can Have my local Mazda dealer find me the part, and I kind Of have to have an auto due to only having one foot to drive...
From my understanding, theres only one model 4 speed auto transmission for the Rx8, and the gentlemen at your local dealers parts department should've been able to find the exact part number of the transmission with a simple search.


I advise you try again with a different Mazda dealer. Also, do you happen to have the exact fault code number? Maybe we may be of more assistance with that fault number
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Old 06-28-2018, 07:03 PM
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Agreed. They should be able to look up with the year and model. No need for a transmission model.

Sounds like someone doesn't know how to do their job.
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Old 06-30-2018, 02:24 PM
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The guy there said he can look for parts with year make and model but nothing shows for exact transmission model code.. which is what I need to find the part I need. I need A torque converter and a transmission but idk why type of transmission I need Lmao.
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Old 06-30-2018, 02:27 PM
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Also @Xero Ryuu the exact code is P0740
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Old 07-01-2018, 09:15 AM
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If they can't look it up using your VIN, they shouldn't be working in the parts department.
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Old 07-02-2018, 05:33 AM
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^^^ I agree with the above. Using the VIN number will narrow it down in Mazda's system to the exact trans serial number put in your car. Even then a competent pats guy should be able to look up the converter lock up solenoid in an exploded view of the trans. Its more than likely in the valve body in the trans. Also, Mazda more than likely did not change anything with their automatic transmission through the years on the 8. I bet they are nearly all the same for all years of the 1st gen 8 and more than likely the same for the 2nd gen 8 as well. Maybe minor changes between generations if any. I believe Aisin makes the trans btw.
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Old 07-02-2018, 10:28 AM
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I looked up the code for you, I looked up symptoms and common required fixes based on what other Mazda owners who encountered the code have encountered. Sadly, that transmission is probably FUBAR'ed and it will be cheaper to just install a used, low mileage 4 speed automatic transmission. I still know some people out in the FL area that might be able to find you a transmission for cheap if you need any help with that and would prefer to source one from somewhere more reputable than some back-alley dude you might find on craigslist.
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Old 07-02-2018, 01:00 PM
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Originally Posted by mazdaverx7 View Post
^^^ I agree with the above. Using the VIN number will narrow it down in Mazda's system to the exact trans serial number put in your car. Even then a competent pats guy should be able to look up the converter lock up solenoid in an exploded view of the trans. Its more than likely in the valve body in the trans. Also, Mazda more than likely did not change anything with their automatic transmission through the years on the 8. I bet they are nearly all the same for all years of the 1st gen 8 and more than likely the same for the 2nd gen 8 as well. Maybe minor changes between generations if any. I believe Aisin makes the trans btw.
04~05 AT are 4-speed. 06~11 AT are 6-speed, so there are definitely differences.
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Old 07-03-2018, 08:00 AM
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I figured there was a difference in the generation split. Thank you for adding the info.
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Old 07-03-2018, 08:41 PM
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This a stupid question but would the newer 6 speed auto fit in my car or would I have To modify something? Cause I have One from my old 2009 Rx8 laying around
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Old 07-03-2018, 08:42 PM
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Originally Posted by Zer0T0lerant View Post
This a stupid question but would the newer 6 speed auto fit in my car or would I have To modify something? Cause I have One from my old 2009 Rx8 laying around
what year and what trans is in your car

edit just saw your first post here. the ecu is different
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Old 07-03-2018, 08:44 PM
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I don’t think it will work, the shift points are different, the engines are actually different too.

I’ve got a 30,000 mile four speed auto sitting in a a garage, let me know if we can work something out.
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Old 07-03-2018, 09:15 PM
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didnt even think about the 4 vs 6 port motor difference. the rear end gearing is probably different too. if the 6sp trans is bigger then the driveshaft would also be different etc. i doubt it would be easy or cheap to do
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Old 07-05-2018, 09:00 PM
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@bigbadchris

How much ya want for it? And where ya located
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Old 07-05-2018, 09:34 PM
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I’m in Dallas Texas. $250? I have no clue what it costs to ship.

Last edited by BigBadChris; 07-05-2018 at 09:39 PM.
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