1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

SA to FB transmission

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Old 02-13-07, 05:26 PM
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SA to FB transmission

Is there a difference in drive shafts between the two? Will my 79 shaft work with an 82 tranny or do I need the 82 shaft?
Old 02-13-07, 05:39 PM
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Shafts are the same. Are you putting a Fb trans in a Sa?
Old 02-13-07, 06:14 PM
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Yeah, Im thinking about it. Just trying to make sure it will work out

I cant find any SA trannys around here so I was thinking of buying The Wankler's 82 transmission in the for sale forum.
Old 02-13-07, 06:18 PM
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It will fit and work just fine, other than the shifter is about 2" further rearward.
Old 02-13-07, 06:20 PM
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Originally Posted by Rogue_Wulff
It will fit and work just fine, other than the shifter is about 2" further rearward.
Thats not a big deal, I just want it to work mechanically, or at least know what else I need to have to make it work.
Old 02-13-07, 06:24 PM
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https://www.rx7club.com/1st-generation-specific-1979-1985-18/need-input-someone-has-done-fb-trans-sa-612876/
Old 02-13-07, 06:25 PM
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The farther rearward shifter means you have to hack up your tunnel and console to make it fit.
Old 02-13-07, 06:25 PM
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Only thing to deal with, is the shifter location. The FB trans looks different on the outside, but everything bolts up the same way. Input shaft, output shaft, even the trans mount are the same.
Old 02-13-07, 06:30 PM
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Originally Posted by rx7doctor
I saw that and thats where I got the idea to just put a later year tranny in. It didnt say anything about the drive shaft so I wasnt sure.

Is it the differentials on LSD rearends that require a different shaft?
Old 02-13-07, 06:34 PM
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79-82 diffs (all) use a smaller flange than the 83-85 diffs (all). Easy way to ID the diff flange, threaded holes = 79-82, non-threaded holes = 83-85. LSD/nonLSD diffs from the same years have the same flange.
Old 02-13-07, 06:35 PM
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83 1/2 on up with the larger ends are different.
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