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

Gears

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Old 12-18-05, 11:22 PM
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vrrmmmmm

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Gears

I got a pair of 4:11s that came with my 82 GSL new in the box. Will these fit in other years?
Old 12-19-05, 01:26 PM
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sellout

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79-83 i believe. mazda switched to larger axles in 84-85 so i dont know if they will work with those years.?
Old 12-19-05, 01:45 PM
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^ correct.
Old 12-19-05, 09:11 PM
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vrrmmmmm

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Do you know how much they cost new?
Old 12-19-05, 09:35 PM
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82's had 3.90's
Old 12-20-05, 02:28 PM
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Form the research I have done, it seems all first gens had 3.90:1's. All second gens have 4.10:1's except GTU s models that had 4.30:1's. You may have a set of second gen 4.10's. The second gen rear gears are not interchangable with gen 1's - gen 1's have 7" ring gear and 2nd gen's have 8" ring gears.

The 84-85 models do have larger axles, but you can use the side gears as needed to swap 3rd members.

I have been told that the old rear-drive 626's had a 3.63 gear that will work in a 1st gen diff, and a diesel 81-83 pickup (or a Ford Courier) has a 3.31 gear that will work. Can anyone confirm this for me? I am looking for a higher gear, as my 1st gen car has a 302 Ford in it, and I don't need a 3.90 gear.
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