GSL-SE trans apart and need main shafts....what will work?
10-26-11, 12:29 PM
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GSL-SE trans apart and need main shafts....what will work?
So I have a GSL-SE 5spd trans apart that I'm having rebuilt for a customers car, I ordered a full syncro and bearing kit, but my buddy who rebuilds trans pointed out the main shaft and 5th gear shaft both have bad pitting and wear.
Mazda shows no stock on either shaft.
Would the FC N/A trans internals be interchangeable? Or possibly Miata trans?
Joe
Mazda shows no stock on either shaft.
Would the FC N/A trans internals be interchangeable? Or possibly Miata trans?
Joe
10-26-11, 08:46 PM
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i think 81-85 main shaft is the same? off the top i think the FC uses a different needle bearing between the mainshaft and the input shaft
the miata should use the late one too, but you should check the bearing part numbers
the miata should use the late one too, but you should check the bearing part numbers
10-27-11, 09:16 AM
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I just looked it up parts catalog. The 12A and 13B use the same shaft.
Parts numbers:
M502-17-221 from '81 to Sep 84
M502-17-221A from Oct 84
Not sure what the change was for the 85 model
Parts numbers:
M502-17-221 from '81 to Sep 84
M502-17-221A from Oct 84
Not sure what the change was for the 85 model
10-27-11, 10:57 PM
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i vaguely remember that the parts fische is wrong. this was in the 90's but i think one number is the 4 speed shaft, and the other is the 5 speed? i know this cause we ordered one.... but this was like 15 years ago... i wanna say that the late number is the 4 speed one?
10-28-11, 08:46 AM
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I thought they dropped the 4 speed in '81? I didn't post the numbers for the 79-80 because they were completely different numbers and I figured different parts.
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10-28-11, 11:30 AM
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11-06-11, 11:31 AM
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Good info guys, I looked around in my parts collection and do not have an FB trans to take apart, so if anyone has a good main shaft and 5th grear set to selll let me know!
Thanks
Thanks
11-07-11, 09:43 AM
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The 5th gear set is different in the SE than the 12A. It should still work but the ratio will be different than stock. This should help: http://www.mazdatrix.com/g1.htm
You should put a want ad up.
You should put a want ad up.
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