I just replaced a worn out carrier bearing, Now I have a vibration at low rpm's in 4th thru 7th gear- doesn't matter loaded or empty-Loaded its more significant. Once reaching normal operation 1500-1600rpm,its fine and smooth.
Checked for play in yokes-everythings tight.
I have some seepage at rear of transmission pinion.
Any ideas? I did NOT have a vibration before I changed carrier.
Vibration at low end torque
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by stayinback, Jun 17, 2019.
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if no play in out put shaft than it is fine
Dave_in_AZ and Rideandrepair Thank this. -
I would check and make sure a weight didn’t get accidentally knocked off the drive line during the carrier replacement
Dave_in_AZ, Rideandrepair and FlaSwampRat Thank this. -
doesnt make sense in his post at all though. its not driveline speed related at all. He says its rpm related. Only thing rpm related would be motor balance. Better check the balancer. If its throwing that much vibration where you can feel it, good by crank and good by motorRideandrepair Thanks this.
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I was just going off more the “didn’t have vibration before I replaced the carrier” commentRideandrepair and FlaSwampRat Thank this.
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Its not Crank Related-Motor mounts are good- Coming from the Trans- Output shaft- Im gonna pull the back half off and check bearings.
Only feel it in the seat-maybe a touch on the wqheel , ONLY UNDER TORQUE CONDITIONS-Rideandrepair Thanks this. -
Your driveline yolks have to be lined up when you put it back together you may have got it off just a little bit and that will make your driveline vibrate !!
Dave_in_AZ, Intothesunset and Rideandrepair Thank this. -
Install the old carrier bearing if you still have it and see what happens.
Rideandrepair Thanks this. -
Remove driveshaft and turn it half way around and re install. They should always be marked and Re-installed the same way. It can only go 2 ways.
Dave_in_AZ and Dino soar Thank this. -
Also you probably know, new straps and bolts, and torque proper. I learned the hard way broke bolt off in yoke, had to replace it. Made Me a believer. Lolstayinback Thanks this.
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