need help finding out what gears i have
#1
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need help finding out what gears i have
the sticker on the inside of the door is gone.
i jacked up the rear and 2 turns of the tire equals about 4.6 turns of the drive shaft. this is for a 94 v6 5 speed.
on my other truck i turn the tire twice and get the 8.2 turns of the driveshaft like im suppose to.
any help is appreciated.
i jacked up the rear and 2 turns of the tire equals about 4.6 turns of the drive shaft. this is for a 94 v6 5 speed.
on my other truck i turn the tire twice and get the 8.2 turns of the driveshaft like im suppose to.
any help is appreciated.
#2
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look on the metal plate in the engine bay up against the fire wall. There will be a long code and that code tells you your gears, engine, tranny, x-case, and anything else. All you havet to do is find a website that breaks it down for you, but they are easy to find.
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I've answered this quite a few times here, so a search would have helped you out, but I'll post it again.
The easiest way is to:
For an open differential:
Leave the tranny or transfer case in neutral, lift one of your rear tires off the ground and leave the other on the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tire while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the tire exactly 20 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
For a locked differential:
Leave the tranny or transfer case in neutral, if the rear is locked, lift both rear tires off the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tires while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the rear wheels exactly 10 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
This way, you don't have to guess as to whether the driveshaft rotated 4.6 times or 4.7 times or 4.8 times. There are no partial revolutions if you do it this way.
The easiest way is to:
For an open differential:
Leave the tranny or transfer case in neutral, lift one of your rear tires off the ground and leave the other on the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tire while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the tire exactly 20 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
For a locked differential:
Leave the tranny or transfer case in neutral, if the rear is locked, lift both rear tires off the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tires while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the rear wheels exactly 10 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
This way, you don't have to guess as to whether the driveshaft rotated 4.6 times or 4.7 times or 4.8 times. There are no partial revolutions if you do it this way.
Last edited by GSGALLANT; 11-01-2006 at 03:22 PM.
#5
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I've answered this quite a few times here, so a search would have helped you out, but I'll post it again.
The easiest way is to:
For an open differential:
Leave the tranny or transfer case in neutral, lift one of your rear tires off the ground and leave the other on the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tire while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the tire exactly 20 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
For a locked differential:
Leave the tranny or transfer case in neutral, if the rear is locked, lift both rear tires off the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tires while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the rear wheels exactly 10 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
This way, you don't have to guess as to whether the driveshaft rotated 4.6 times or 4.7 times or 4.8 times. There are no partial revolutions if you do it this way.
The easiest way is to:
For an open differential:
Leave the tranny or transfer case in neutral, lift one of your rear tires off the ground and leave the other on the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tire while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the tire exactly 20 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
For a locked differential:
Leave the tranny or transfer case in neutral, if the rear is locked, lift both rear tires off the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tires while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the rear wheels exactly 10 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
This way, you don't have to guess as to whether the driveshaft rotated 4.6 times or 4.7 times or 4.8 times. There are no partial revolutions if you do it this way.
i did search and that was where i came up with my method of testing.
it worked when i did it on my truck 8.2 turns with one turn of the tire.
the unknown gear truck the driveshaft only turned about 4.56 for one turn of the tire.
one thing that might have messed me up was i had the whole rear end off the ground and not just one tire. didnt think about it possibly being a locked diff either.
thanks for the responses.
--adam
#6
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If the truck came with 31" tires or was an SR5 it has 4.56, if it came with tiny tires it's 4.11
Automatics came with 4.88.
If you jack only one tire, you are spinning thru the spyders and will get a 2x multiplier
Automatics came with 4.88.
If you jack only one tire, you are spinning thru the spyders and will get a 2x multiplier
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when i jacked the whole rear up i made sure only one tire was spinning, the one i had marked.
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#10
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Look at an open differential this way: The driveshaft will rotate X times (where X is the gear ratio) the average number of rotations that both of your rear wheels make.
For example, say you have 4.56 gears. While you are in park with both wheels off the ground, and you rotate one wheel forward 1 rev, the other rotates backwards 1 rev, and the driveshaft doesn't move.
So your driveshaft rotates 0 revolutions / 4.56 = 0. That means the average # of rotations your rear wheels have to make is also zero. The average of 1 revolution (forward) plus negative 1 revolution (backward) is zero, so that works.
Example 2: With 4.56 gears, while in neutral with one wheel on the ground and one wheel up, when the driveshaft rotates 9.1 revolutions / 4.56 = 2. That means the average # of rotations your rear wheels have to make is also 2. The wheel on the ground rotates 0 times, so the one in the air will rotate 4 times (4+0)/2 = 2.
Last edited by GSGALLANT; 09-13-2007 at 04:37 AM.
#11
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Basically trying to make sweeping generalizations for the gear ratios just won't work, you need the axle code.
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I've answered this quite a few times here, so a search would have helped you out, but I'll post it again.
The easiest way is to:
For an open differential:
Leave the tranny or transfer case in neutral, lift one of your rear tires off the ground and leave the other on the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tire while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the tire exactly 20 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
For a locked differential:
Leave the tranny or transfer case in neutral, if the rear is locked, lift both rear tires off the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tires while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the rear wheels exactly 10 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
This way, you don't have to guess as to whether the driveshaft rotated 4.6 times or 4.7 times or 4.8 times. There are no partial revolutions if you do it this way.
The easiest way is to:
For an open differential:
Leave the tranny or transfer case in neutral, lift one of your rear tires off the ground and leave the other on the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tire while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the tire exactly 20 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
For a locked differential:
Leave the tranny or transfer case in neutral, if the rear is locked, lift both rear tires off the ground. Mark the driveshaft with a piece of tape or a dab of liquid paper so you can count the revolutions. Get a friend to help you rotate the tires while you lay under the truck and count the number of revolutions the driveshaft makes.
When you get set up, get your friend to rotate the rear wheels exactly 10 times. Count the number of times the driveshaft rotates. Devide the number of driveshaft revolutions by 10 to get your ratio. (If you have 4.100 gears, the driveshaft will rotate 41 times... 41/10=4.1)
This way, you don't have to guess as to whether the driveshaft rotated 4.6 times or 4.7 times or 4.8 times. There are no partial revolutions if you do it this way.
Once again, thanks.
Richard
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