4x4 highway speed????
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Joined: Mar 2013
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From: Over There
Assuming open diffs I jack up only one wheel leaving the other on the ground or block. Mark the driveline and tire, then turn the tire that is in the air 20 times counting the driveline rotations. Doing it this way is the best way to be accurate when looking at a variation as small as the difference between 3.55s and 3.73s. Doing it this way 3.55s is 35 and 1/2 turns, 3.73s is 37 and 1/3 turns, etc. hard to be off when the difference is two full turns. If you turn the tire only twice as some would recommend you have to guess between 3 and 1/2 turns and 3 and 3/4 turns.
Some will recommend turning each tire once or ten times, this takes more work and or at least 2 people and is less accurate. The only reason to turn both is if there is a locker or posi that prevents only turning one.
I find it best when doing this by myself to keep my eyes on the driveline and keep my hand on one spot on the tire so I don't have to take my eyes off the driveline to look at the tire. And I count the driveline rotations with a nail in the dirt, or pen and paper or something, not in my head, I count tire rotations in my head so only counting one thing. Then just look at the results of the driveline count.
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Joined: Jun 2013
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You're welcome, do you know how to accurately check the ratio easily?
Assuming open diffs I jack up only one wheel leaving the other on the ground or block. Mark the driveline and tire, then turn the tire that is in the air 20 times counting the driveline rotations. Doing it this way is the best way to be accurate when looking at a variation as small as the difference between 3.55s and 3.73s. Doing it this way 3.55s is 35 and 1/2 turns, 3.73s is 37 and 1/3 turns, etc. hard to be off when the difference is two full turns. If you turn the tire only twice as some would recommend you have to guess between 3 and 1/2 turns and 3 and 3/4 turns.
Some will recommend turning each tire once or ten times, this takes more work and or at least 2 people and is less accurate. The only reason to turn both is if there is a locker or posi that prevents only turning one.
I find it best when doing this by myself to keep my eyes on the driveline and keep my hand on one spot on the tire so I don't have to take my eyes off the driveline to look at the tire. And I count the driveline rotations with a nail in the dirt, or pen and paper or something, not in my head, I count tire rotations in my head so only counting one thing. Then just look at the results of the driveline count.
Assuming open diffs I jack up only one wheel leaving the other on the ground or block. Mark the driveline and tire, then turn the tire that is in the air 20 times counting the driveline rotations. Doing it this way is the best way to be accurate when looking at a variation as small as the difference between 3.55s and 3.73s. Doing it this way 3.55s is 35 and 1/2 turns, 3.73s is 37 and 1/3 turns, etc. hard to be off when the difference is two full turns. If you turn the tire only twice as some would recommend you have to guess between 3 and 1/2 turns and 3 and 3/4 turns.
Some will recommend turning each tire once or ten times, this takes more work and or at least 2 people and is less accurate. The only reason to turn both is if there is a locker or posi that prevents only turning one.
I find it best when doing this by myself to keep my eyes on the driveline and keep my hand on one spot on the tire so I don't have to take my eyes off the driveline to look at the tire. And I count the driveline rotations with a nail in the dirt, or pen and paper or something, not in my head, I count tire rotations in my head so only counting one thing. Then just look at the results of the driveline count.
Mark
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