1997 SR5 4runner 4wd Pinion Angle issue
03-07-2008, 09:13 AM
#1
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1997 SR5 4runner 4wd Pinion Angle issue
Well to make the story short I had a new rear drive shaft made to replace my failing unit. The new double cardan joint is about 2 inches shorter than the stock unit. This made my pinion/driveshaft angle change and im getting vibration/noise over 65mph. Since the 4runner has a coil spring link suspension is there anything I can do or have some one do to change my drive shaft angle? I know with leaf springs all you need is angle shims....WISH IT WAS THAT EASY.....Sigh
Any help would be appriciated.
Any help would be appriciated.
03-07-2008, 10:32 AM
#2
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I do know that if its not a toyota cv then the angles could be too steep to work right and may give you a bad vibration and fail prematurly. A stock yota u-joint will reach angles of 45degrees. cv angles a bit less
03-07-2008, 05:50 PM
#3
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A shorter drive shaft will not change your pinion angle. Suspension geometry or relocating the transfer case is the only thing that can change the angle.
If the drive shaft is 2 inches shorter, that means the slip would have to be pulled out 2 inches more than stock since the distance from the transfer case output to the diff would not have changed with a new drive shaft. That shouldnt cause vibrations unless it is getting ready to pull out of the slip joint.
If your getting vibrations, you need to have the new shaft checked. Its either out of balance, out of phase, or has bad ujoints. Sounds like whoever made the drive shaft did a poor job. Take it back to them ASAP.
If the drive shaft is 2 inches shorter, that means the slip would have to be pulled out 2 inches more than stock since the distance from the transfer case output to the diff would not have changed with a new drive shaft. That shouldnt cause vibrations unless it is getting ready to pull out of the slip joint.
If your getting vibrations, you need to have the new shaft checked. Its either out of balance, out of phase, or has bad ujoints. Sounds like whoever made the drive shaft did a poor job. Take it back to them ASAP.
Last edited by Adam F; 03-07-2008 at 05:52 PM.
03-08-2008, 03:33 AM
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Hmm, if the double cardan is shorter than stock then that should make for less of an angle. I agree with the other guys, sounds like it is not true, unbalanced or the cardan is defective.
03-08-2008, 05:40 AM
#6
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A shorter drive shaft will not change your pinion angle. Suspension geometry or relocating the transfer case is the only thing that can change the angle.
If the drive shaft is 2 inches shorter, that means the slip would have to be pulled out 2 inches more than stock since the distance from the transfer case output to the diff would not have changed with a new drive shaft. That shouldnt cause vibrations unless it is getting ready to pull out of the slip joint.
If your getting vibrations, you need to have the new shaft checked. Its either out of balance, out of phase, or has bad ujoints. Sounds like whoever made the drive shaft did a poor job. Take it back to them ASAP.
If the drive shaft is 2 inches shorter, that means the slip would have to be pulled out 2 inches more than stock since the distance from the transfer case output to the diff would not have changed with a new drive shaft. That shouldnt cause vibrations unless it is getting ready to pull out of the slip joint.
If your getting vibrations, you need to have the new shaft checked. Its either out of balance, out of phase, or has bad ujoints. Sounds like whoever made the drive shaft did a poor job. Take it back to them ASAP.
03-11-2008, 03:50 PM
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Im going to have some one check it. Anyway it appears that my rear pinion is on too steep of an angle pointed upwards compared to the shaft. I have heard any more than 3 degrees out can give vibrations.
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03-12-2008, 01:02 AM
#8
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Check that your upper and lower suspension links arent bent. That would cause the pinion angle to change.
Why did you replace the drive shaft in the first place?
Why did you replace the drive shaft in the first place?
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