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Intermittent grinding noise rotational #737584
June 26th 2018 3:11 pm
June 26th 2018 3:11 pm
Joined: Aug 2010
Posts: 101
Joizy Shawr - Tolls & Taxes
Doone Offline OP
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Joizy Shawr - Tolls & Taxes
I had my shocks changed out and I changed my power steering fluid. About 20 miles afterward a grinding noise that is definitely rotational showed up. I checked the trans fluid and its clean, clear and has no burning odor, Trans not slipping, all up and downshifts good -even in kickdown mode, however intermittent noise rises and falls more with engine rpm rather than wheel speed. I checked the ebrake and its operating properly stopped or in motion. Checked u joints, no clicking or unusual movement. Noise present on acceleration but fades with speed or by taking foot off the throttle. All vacuum and emissions functioning properly.


Any ideas anyone? 305 F code automatic.
Thanx, Doone


85 Chevy Beauville G20

In Memorium: 67 Jeepster Commando Convertible Roadster-VICTIM OF SUPERSTORM SANDY
Re: Intermittent grinding noise rotational [Re: Doone] #737586
June 26th 2018 3:30 pm
June 26th 2018 3:30 pm
Joined: Sep 2013
Posts: 690
Indiana
tuner4life Offline
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Indiana
Sounds like the steering pump to me. What fluid did you use?


[Linked Image]
1985 Chevy G20 305ci/4spd Manual
Re: Intermittent grinding noise rotational [Re: tuner4life] #737599
June 26th 2018 5:32 pm
June 26th 2018 5:32 pm
Joined: Aug 2010
Posts: 101
Joizy Shawr - Tolls & Taxes
Doone Offline OP
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Joizy Shawr - Tolls & Taxes

Thanx for your reply, Ive only put about 50 miles on since fluid change. I used a fresh bottle of STP ps fluid If I put in wrong type, I can change it out again, I hope its no biggie, should I have used dexron atf?

Last edited by Doone; June 26th 2018 5:54 pm.

85 Chevy Beauville G20

In Memorium: 67 Jeepster Commando Convertible Roadster-VICTIM OF SUPERSTORM SANDY
Re: Intermittent grinding noise rotational [Re: Doone] #737600
June 26th 2018 5:36 pm
June 26th 2018 5:36 pm
Joined: Aug 2010
Posts: 101
Joizy Shawr - Tolls & Taxes
Doone Offline OP
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Joizy Shawr - Tolls & Taxes
T Y


85 Chevy Beauville G20

In Memorium: 67 Jeepster Commando Convertible Roadster-VICTIM OF SUPERSTORM SANDY
Re: Intermittent grinding noise rotational [Re: Doone] #737606
June 26th 2018 9:41 pm
June 26th 2018 9:41 pm
Joined: Mar 2016
Posts: 316
Tucson,Az.
H
Hasan Ben Sobar Offline
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Hasan Ben Sobar  Offline
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Posts: 316
Tucson,Az.
Never changed PS fluid in 50 years of wrenching. In a steering pump /box the fluid is basically hydraulic fluid. No real wear factor.


Tucson-it's a dry heat...like an oven
Re: Intermittent grinding noise rotational [Re: Hasan Ben Sobar] #737631
June 27th 2018 9:37 am
June 27th 2018 9:37 am
Joined: Aug 2010
Posts: 101
Joizy Shawr - Tolls & Taxes
Doone Offline OP
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Thanks, in a 38 y o truck it does tend to become dirty, especially if prior owners neglected to properly service.


85 Chevy Beauville G20

In Memorium: 67 Jeepster Commando Convertible Roadster-VICTIM OF SUPERSTORM SANDY
Re: Intermittent grinding noise rotational [Re: Doone] #737660
June 28th 2018 8:48 am
June 28th 2018 8:48 am
Joined: Nov 2013
Posts: 963
West Texas
W
Wedgy Offline
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Wedgy  Offline
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Posts: 963
West Texas
Hi Doone, Welcome to the site!

I've have had quite a few bearing failures in the Rotating assembly on the Serpentine systems in my "Newer," model Vans. West Texas is HARD on vehicles...

Also half a dozen Alternator bearing failures of the years. An AC clutch bearing failure will make that noise as well. Try and isolate it with a mechanics stethoscope. BE Extremely careful.

Daaaamn Ben, and I thought I was an Old Dog... Cheers!

Re: Intermittent grinding noise rotational [Re: Wedgy] #737673
June 28th 2018 6:27 pm
June 28th 2018 6:27 pm
Joined: Aug 2010
Posts: 101
Joizy Shawr - Tolls & Taxes
Doone Offline OP
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Joizy Shawr - Tolls & Taxes
Thanx 4 your reply, I just changed out the ps fluid again and will take 4 a cruise tonite to see if that eliminated that possibility. I dont think its the alt as I changed that out about 1500 miles ago and it works fine. I will check out the a/c clutch next, hadnt thought of that, it blows real cold and theres no burnt smell in that area. I will get a hold of a stethoscope to listen to the idler pulley and belts as you suggested. 'Preciate your help pardner, lots of open space between those west Texas towns I hear.


85 Chevy Beauville G20

In Memorium: 67 Jeepster Commando Convertible Roadster-VICTIM OF SUPERSTORM SANDY
Re: Intermittent grinding noise rotational [Re: Doone] #737680
June 28th 2018 9:25 pm
June 28th 2018 9:25 pm
Joined: Aug 2010
Posts: 101
Joizy Shawr - Tolls & Taxes
Doone Offline OP
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Joizy Shawr - Tolls & Taxes
Nope, now it hums loud with a vibrarion so Im thinkin its drive shaft related either a yoke or the universals. Wish I had a hydraulic lift.


85 Chevy Beauville G20

In Memorium: 67 Jeepster Commando Convertible Roadster-VICTIM OF SUPERSTORM SANDY
Re: Intermittent grinding noise rotational [Re: Doone] #737688
June 29th 2018 8:13 am
June 29th 2018 8:13 am
Joined: Nov 2013
Posts: 963
West Texas
W
Wedgy Offline
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Wedgy  Offline
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Joined: Nov 2013
Posts: 963
West Texas
Hi Doone,

Ha! Yes. Definitely wide open spaces 'round here. Uh Oh, that song is stuck in my head now.

I should add, the bad AC clutch bearing gets worse and sounds like a box of rocks. That bearing carries the load when the AC is off. When the AC is on, the front bearing inside the compressor is load bearing.

I've gone through 2 rebuilt bad alternator bearing failures lately on the 120 amp in the B350. Not sure if I should buy new, but the $150 looks better in my pocket, and to me it's only time that I spend working on the Van. I'm getting better at it, But it is getting old...

On the lift situation, I've found a tire shop that I Iike here, spent some money, well, a lot of money with 3 Vans and a Mexican Dodge, and stop in occasionally. They do it for me, but it is Texas...

Catch them when it's slow, see if they'll do you a solid. Doesn't hurt to ask. Good Wrenching Doone!

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