gear ratios

[bamracing]

Were there different gear ratios available in the open differentials from the factory? Or were they the same every year in the coupe and the fastback? I'm planning to weld mine to lock it for dirt track racing. s13/s14
Modified by bamracing at 3:00 PM 8/8/2007

[dickie]

there were r200 diffs that used different ratios that you can swap into your housing, but afaik all usdm open diffs had the same.

[Mazworx]

Rear end gears to choose from for the factory R200: 4.083, 4.363, 4.636, 4.9

[bamracing]

Thanx for the info. Is there any easy way to tell them apart without opening up the dif?

[karmakaze]

Thanx for the info. Is there any easy way to tell them apart without opening up the dif?

turn the drive input and count how many rotations the half shaft makes.