Author Topic: bad vibration (Read 171201 times)

philo_beddoe · « **on:** October 17, 2015, 10:15:27 pm »

Surprised i couldent find some old posts on this. 2wd c10, starting to notice a pulsating vibration at about 45-50 mph. Feel it right through the seats, not the steering column. Most likely u joints?? How do you check or test them?

85ckaz · « **Reply #1 on:** October 18, 2015, 01:57:52 pm »

I replaced the transmission mount in my K20 to eliminate the same issue. To check U joints just push on the drive shaft and you should have no movement. I would also check the pinion gear bearings/ rear diff yoke for movement. They should be tight. If there is slop in anything it needs to be repaired/ replaced.

philo_beddoe · « **Reply #2 on:** October 19, 2015, 08:06:55 am »

I'm on it! Thanks!

philo_beddoe · « **Reply #3 on:** October 20, 2015, 07:32:44 am »

New tires and factory rims, but i'll check the weights anyway. It is not "shuddering" like a bad unbalanced wheel, more of a steady vibrate, hardly pulsating i guess, seems to smooth out near 60 mph. I tried to move driveshaft, tight as a drum.

philo_beddoe · « **Reply #4 on:** October 20, 2015, 07:37:16 am »

....oh and yes, one piece shaft, as far as being a new problem.,, we'll im just now noticing. I guess i'll let it go for now. My mechanic is a chevy guy, (i only use him when a garage is needed), im getting new exh manifolds put on soon, i'll have him take a look.

philo_beddoe · « **Reply #5 on:** October 22, 2015, 10:15:28 pm »

Not sure what you mean "out of phase"

philo_beddoe · « **Reply #6 on:** October 27, 2015, 05:26:14 pm »

That makes good sense., but i have a one piece shaft.

philo_beddoe · « **Reply #7 on:** October 27, 2015, 05:29:21 pm »

....or does it matter in terms of speaking out of phase?

philo_beddoe · « **Reply #8 on:** October 28, 2015, 09:50:29 am »

I will take a look. It seem to let up when i let off the gas. Does this make sense?

Irish_Alley · « **Reply #9 on:** October 28, 2015, 10:41:51 am »

Yes. I know with my crew cab I had a vibration. I replaced the carrier bearing and my shaft was out of phase fixed both them and the vibration under throttle went away.

philo_beddoe · « **Reply #10 on:** October 28, 2015, 08:39:12 pm »

Carrier bearing? Ok, where is it and what does it look like? I have not delved into that area too much.

Captkaos · « **Reply #11 on:** October 28, 2015, 09:02:15 pm »

The carrier bearing will be in the driveshaft.

philo_beddoe · « **Reply #12 on:** October 28, 2015, 09:30:08 pm »

Ok, will have a look, thanks.

Irish_Alley · « **Reply #13 on:** October 28, 2015, 09:36:07 pm »

Carrier bearing won't be found on your truck. Only 2+ piece drive shafts. It keeps the driveshaft in line. There's a physical limit to how long/thick a driveshaft can be. So they have to split it up in a couple different sections. Fist section will have the driveshaft bolted to the transmission or transfer case. Then a few feet down the carrier bearing attaches to the frame to keep it in line then you have male splines on the end of the first shaft and a female slip yoke drive shaft that will bolt to the rear

philo_beddoe · « **Reply #14 on:** October 28, 2015, 09:52:02 pm »

Ok, appreciate the feedback. Maybe it's the flux capacitor...lol. I will get under there and check correct phase first, check ujoints again, etc.

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Author Topic: bad vibration (Read 171201 times)

philo_beddoe

bad vibration

85ckaz

Re: Pulsating vibration at 50

philo_beddoe

Re: Pulsating vibration at 50

philo_beddoe

Re: Pulsating vibration at 50

philo_beddoe

Re: Pulsating vibration at 50

philo_beddoe

Re: Pulsating vibration at 50

philo_beddoe

Re: Pulsating vibration at 50

philo_beddoe

Re: Pulsating vibration at 50

philo_beddoe

Re: Pulsating vibration at 50

Irish_Alley

Re: Pulsating vibration at 50

philo_beddoe

Re: Pulsating vibration at 50

Captkaos

Re: Pulsating vibration at 50

philo_beddoe

Re: Pulsating vibration at 50

Irish_Alley

Re: Pulsating vibration at 50

philo_beddoe

Re: Pulsating vibration at 50