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04-17-2020, 07:12 PM | #1 |
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Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,308
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Pinion Seal replacement 2016 1 ton dually, 2WD...
I service and repair a fleet of vehicles. I have done a lot of things, replaced a lot of pinion seals, never had one give me any trouble.........
2016 One ton dually pickup (2wd), tows cattle trailers, has a heavy flat bed on it. I had been under the weather last 3 months of 2019, and not too terribly well from Jan-Mar of this year (kidney stones). This pickup gets boat load of miles put on it. I was unable to service it the last two times it was in need, SOOO they take it to an oil change place. The oil change experts managed to install a new air filter. I am sure it didn't get any grease, tires were not checked and the differential wasn't checked, obviously...When I check the differential oil, I stick my pocket screwdriver in the oil fill hole. I checked this one several times. After sticking screwdriver straight down in hole, I got about half a drip on it...well crap I say to myself. I slide around on other side of differential. Pinion seal had been leaking. Dust combined with oil to make a nice crust, and a LOT of it... I replaced the pinion seal. The surface on the yoke had 2 nice grooves in it, bought a new yoke. New yoke comes with a new seal, pinion nut, and washer for nut. Replaced seal, nut/washer and yoke, got pinion nut tightened to where old one was (for bearing pre-load on bearings, crush sleeve...). Filled it up with 75W90 synthetic gear oil, just as manual says to. One thing I did notice when I poured the drain pan into my used oil tank. There were a lot of little chunks of something at the bottom of the drain pan. The chunks are gritty, and non metallic. I let the diff drain after I pulled the cover, I then sprayed down the gear area with brake cleaner. THis pickup DOES get driven on unpaved roads, a lot!!! Rear end howls quite nicely, now. I have driven this pickup in the past, on test drives. It never made any noise. My next move is??? Last edited by 68Gold/white; 04-17-2020 at 07:33 PM. |
04-17-2020, 08:41 PM | #2 |
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Join Date: Jan 2013
Location: Eastern TN
Posts: 1,921
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Re: Pinion Seal replacement 2016 1 ton dually, 2WD...
could the grit be clutch material from the posi? I would run it a day and drain again. Maybe there is crap in the bearings that needs cleaned out still.
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04-18-2020, 05:33 PM | #3 | |
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Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,308
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Re: Pinion Seal replacement 2016 1 ton dually, 2WD...
Quote:
It only makes noise when you are accelerating, and accelerating even a small amount, or have your foot in it. Let off the throttle, no noise. It all tells me it's a gear problem... Monday I am going to ruinate that new GM pinion seal, by removing it, and remove the front pinion bearing, see what it looks like. I tried to shake the drive shaft before I even took the drive shaft loose, It was tight...Pinion yoke turns freely w/ drive shaft removed. |
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