Gear ratio check

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==Rotating the tires method==
 
==Rotating the tires method==
  
With a standard differential raise one wheel off of the ground, mark the tire at the 6:00 position, mark the drive shaft. Turn the tire exactly 2 full turns. Count the number of times that the drive shaft turns.  
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With a standard open (non posi traction) differential raise one wheel off of the ground, mark the tire at the 6:00 position, mark the drive shaft. Turn the tire exactly 2 full turns. Count the number of times that the drive shaft turns.  
  
 
2 3/4 turns of the drive shaft = 2.73, just past 3 turns = 3.08, 3 1/3 = 3.23 or 3.31, almost 3 1/2 = 3.42, just past 3 1/2 = 3.55, 3 3/4 = 3.73, just past 4 = 4.10 or 4.11.
 
2 3/4 turns of the drive shaft = 2.73, just past 3 turns = 3.08, 3 1/3 = 3.23 or 3.31, almost 3 1/2 = 3.42, just past 3 1/2 = 3.55, 3 3/4 = 3.73, just past 4 = 4.10 or 4.11.
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If there is a removable cover on the differential you can count the teeth on the ring and pinion gears.
 
If there is a removable cover on the differential you can count the teeth on the ring and pinion gears.
  
Count the teeth on the pinion now. Then divide the number of teeth on the pinion into the number of teeth into the ring gear and you have the ratio.
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Count the teeth on the pinion and ring gears. Then divide the number of teeth on the pinion into the number of teeth into the ring gear and you have the ratio.
  
  

Revision as of 22:32, 10 January 2011

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