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Does the RX7 have a transmission ID number?

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Old 11-30-21, 06:30 PM
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Does the RX7 have a transmission ID number?

so im looking everywhere for some kind of ID number for the rx7 trans but I cant seem to find it anywhere. you know, like how GM has there 4L60 trans, im looking for its ID number. its ~1990 T2 5 speed. I looked on another form and it talked about there being many variants of the transmission in both J-spec and A-spec markets but you would think there would still be an identification number on it somewhere, right?

Also does anyone know where I can find a rebuild kit for one of these or know of any reputable sites that sells them.

Last edited by Paulc19; 12-01-21 at 07:11 AM.
Old 12-01-21, 08:34 AM
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As far as basic rebuilding is concerned, you'll need bearings, synchros, and some gear oil RTV sealer

The sealant can be bought at O'Reillys, no big deal.
The synchros I got from the Mazda dealership.
Bearings I found a kit online. As long as the make and fitment match up, they're the same thing. You just want the same make of Japanese bearings.
Here's the bearing kit I think I used a few years ago... https://transpartswarehouse.com/bk19...kit-87-95.html
It comes with synchros in it I believe.

You don't need to use the pan gasket, as Mazda just RTV'd the original pans in place.

Also note, if you change the end bearings, you will need to check and see if it needs shimmed or your gears will start chewing each other apart when you start it.

Last edited by professionalpyroman; 12-01-21 at 08:36 AM.
Old 12-01-21, 09:03 AM
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Originally Posted by professionalpyroman
As far as basic rebuilding is concerned, you'll need bearings, synchros, and some gear oil RTV sealer

The sealant can be bought at O'Reillys, no big deal.
The synchros I got from the Mazda dealership.
Bearings I found a kit online. As long as the make and fitment match up, they're the same thing. You just want the same make of Japanese bearings.
Here's the bearing kit I think I used a few years ago... https://transpartswarehouse.com/bk19...kit-87-95.html
It comes with synchros in it I believe.

You don't need to use the pan gasket, as Mazda just RTV'd the original pans in place.

Also note, if you change the end bearings, you will need to check and see if it needs shimmed or your gears will start chewing each other apart when you start it.
does it matter if its an s4 or s5 transmission? if so how do I find out which one mine is because its not the original transmission for my car and the previous owner of the trans had it swapped into their car as well.
Old 12-01-21, 10:35 AM
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Originally Posted by Paulc19
does it matter if its an s4 or s5 transmission? if so how do I find out which one mine is because its not the original transmission for my car and the previous owner of the trans had it swapped into their car as well.
https://www.rx7club.com/general-rota...guide-1153243/

glad you asked! there are basically 3 FC turbo variations. the S4, and S5, which i think would share most of the bearings and synchros. the third is the early S4, which has a different 5th gear synchro.

there is a Mazda code for the thing, but its not on the trans so it doesn't matter too much. its like R 152 or something like that
Old 12-01-21, 11:07 AM
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Originally Posted by j9fd3s
https://www.rx7club.com/general-rota...guide-1153243/

glad you asked! there are basically 3 FC turbo variations. the S4, and S5, which i think would share most of the bearings and synchros. the third is the early S4, which has a different 5th gear synchro.

there is a Mazda code for the thing, but its not on the trans so it doesn't matter too much. its like R 152 or something like that
EXACTLY what I needed, thank you! Now I just need to find a kit for it now that I know mine is an S4. im also wondering where I can get the smaller stuff like snap rings and roll pins, or do they come with the rebuild kit?
Currently im looking at this one off ebay since its the same part number as one I found on rock auto: USA Standard Gear ZMBK137CWS Manual Transmission Bearing and Seal Overhaul Kit | eBay
as well as the kit that was recommended in a previous reply: https://transpartswarehouse.com/bk19...kit-87-95.html
Old 12-01-21, 12:53 PM
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Originally Posted by Paulc19
EXACTLY what I needed, thank you! Now I just need to find a kit for it now that I know mine is an S4. im also wondering where I can get the smaller stuff like snap rings and roll pins, or do they come with the rebuild kit?
Currently im looking at this one off ebay since its the same part number as one I found on rock auto: USA Standard Gear ZMBK137CWS Manual Transmission Bearing and Seal Overhaul Kit | eBay
as well as the kit that was recommended in a previous reply: https://transpartswarehouse.com/bk19...kit-87-95.html
all the little bits need to come from Mazda. feel free to post what you need or shoot me a PM, i sit in front of the EPC all day, so i'm happy to look stuff up
Old 12-01-21, 01:59 PM
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Originally Posted by j9fd3s
all the little bits need to come from Mazda. feel free to post what you need or shoot me a PM, i sit in front of the EPC all day, so i'm happy to look stuff up
wonder how much its going to cost since its coming from a dealer... when I have the tranny fully apart Ill PM you what Im looking for. have only taken the tail end off and have already busted a roll pin and bent a snap ring trying to get it off the shaft.
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Old 12-02-21, 08:44 AM
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Originally Posted by Paulc19
wonder how much its going to cost since its coming from a dealer... when I have the tranny fully apart Ill PM you what Im looking for. have only taken the tail end off and have already busted a roll pin and bent a snap ring trying to get it off the shaft.
its not too bad, roll pins and snap rings are a few bucks each
Old 12-02-21, 01:42 PM
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Originally Posted by Paulc19
so im looking everywhere for some kind of ID number for the rx7 trans but I cant seem to find it anywhere. you know, like how GM has there 4L60 trans, im looking for its ID number. its ~1990 T2 5 speed. I looked on another form and it talked about there being many variants of the transmission in both J-spec and A-spec markets but you would think there would still be an identification number on it somewhere, right?

Also does anyone know where I can find a rebuild kit for one of these or know of any reputable sites that sells them.
I've found a couple useful sites over the years. Cobra Transmission and PartSouq. The former sells kits, the latter is great for looking up individual parts and equivalents if you're willing to spend some time searching.
https://partsouq.com/en/catalog/genu...31&uid=7745&q=
https://cobratransmission.com/rotary...kit-50223001-1
Cobra has a kit that includes the syncros for $400 more, or the synchos sold as their own kit for $31. Yes, 400 vs 31. They've changed the kits since I last ordered from the site, so I'm not sure about the accuracy of their contents.

The transmission ID is a clear plastic sticker on the top of the bell housing. I imagine they've fallen off for most people. It won't do you any good though; I've not seen any websites that identify with it.



Last edited by Delphince; 12-02-21 at 01:46 PM.
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