the rpms on a 91 4runner v6 5spd
Sep 26, 2010 | 10:11 PM
#7
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Joined: Mar 2010
Posts: 50
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From: Roseville
http://www.brian894x4.com/Gearratiosanddiffs.html
or hop under the car spin your drive shaft and see how many turns your drive shaft makes to spin your wheel a complete 360 degrees
or hop under the car spin your drive shaft and see how many turns your drive shaft makes to spin your wheel a complete 360 degrees
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Sep 26, 2010 | 10:29 PM
#8
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Joined: May 2009
Posts: 666
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From: Moscow, ID
http://www.brian894x4.com/Gearratiosanddiffs.html
or hop under the car spin your drive shaft and see how many turns your drive shaft makes to spin your wheel a complete 360 degrees
or hop under the car spin your drive shaft and see how many turns your drive shaft makes to spin your wheel a complete 360 degrees
- If you think your axle gearing has not been changed since it left the factory, you can read and decode the "axle code" from your vehicle information plate. Off-road.com has some pretty good information how to do this HERE (scroll down to the section titled "Gearing").
- If your differential has been removed so that you can see and count the teeth on the gears, you can divide the number of teeth on the ring gear by the number of teeth on the pinion gear to come up with their ratio. For example, 41/10 gives you a 4.10:1 gear ratio (the most common stock ratio).
- To verify gear ratios w/ the diffs on the vehicle, there is the "spin and count" method: For "open" diffs:
- Block the tires at one end of the vehicle to keep it from rolling, and then jack up a tire on the other end.
- Place the transmission in neutral and release the parking brake if you are checking the rear diff.
- Spin the tire exactly TWO full revolutions while at the same time counting exactly how many revolutions the driveshaft spins (marking the driveshaft and tires beforehand will make it easier to count revolutions).
- The number of revolutions the driveshaft spins is your gear ratio.
If it spins just over 4 times, then the ratio is probably 4.10; 4-1/3 = 4.30; 4-1/2 = 4.56; just under 5 = 4.88; 5-1/3 = 5.29, etc.
- With these types of diffs, you won't be able to turn one tire w/o the tire on the opposite side of the axle turning with it.
- In this case, follow the directions above except raise both tires off the ground and turn them exactly ONE full revolution while counting driveshaft revolutions.
- Again, the number of driveshaft revolutions is your gear ratio as mentioned above.
Kzink thanks, I have seen that link before but forgot to save it, SAVED.
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