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^After looking at the Mazdatrix and Racing Beat site, I'm guessing that this is not possible. The 72-85 pinions are very short, and the 86-92 uses a very long pinion gear. So swapping the entire ring and pinion swap is not possible.
But can you swap in the ring gear from the Kia into the FC diff? This would give you a 4.3 ratio without having to find the very rare GTUs rear.
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what I have:
1985 Gs:12a All motor Drag car - 1973 Rx2: Play car
What I had:
93 Touring: TRADED - 91 Coupe: TRADED - 90 GTU: RHD - 88 10AE: SOLD - 87 Base: SOLD - 86 Base: SOLD - 1985 GSLSE - 85 Gsl: SOLD - 80 Gs: TRADED - 1972 Rx2
Last edited by sen2two; 08-15-2010 at 02:13 PM.
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