question

[mistu]

i was wondering if any one here knows the gear ratios of a 89 sonata km-210 trans

[SpeedRacer]

Since I have no clue what a KM-210 is, and you didn't say if your car is auto/manual here's both of them:

This applies for 2.4L I4 and 3.0L V6.

MANUAL TRANSMISSION
1st: 3.166
2nd: 1.833
3rd: 1.240
4th: 0.896
5th: 0.666
Final: 4.067

AUTOMATIC TRANSMISSION:
1st: 2.551
2nd: 1.488
3rd: 1.000
4th: 0.685
Final: 3.986

[bryce804]

what does final gear mean?

[Hyundai92Excel]

end gear ratio. Kinda like the rear end or the differential gear ratio.