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Old 11-08-2013, 11:28 AM   #1 (permalink)
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Default 1st GEAR KNOCKING OR GRINDING SOUND

Yesterday on my way home my 87 Sami developed a noise sounding like some sort of gear slippin when starting out in 1st gear and once torque is eleviated the noise subsided. Although I was nursing it quite a bit to make it home. So I did not press my luck to see how bad I could make it grind. I happened once or twice in the begining of second also but not as bad. I am looking for a place to start my search as the most likely cause. I know the bearings in my transfer case make a lil noise and I just got the rebuild kit and new gears for that. But the noise just doesn't seem like that. I am leaning towards the rear end diff but don't know how common this is with Sami's and how to diagnos without disassembling it first. Trying to keep guesswork to a mininmum. Thanx for any help someone may have.
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Old 11-08-2013, 12:35 PM   #2 (permalink)
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The rear diff is probably NOT the issue, if noises are peculiar to starting out in first gear (sometimes 2nd) as you describe.

Maybe clutch, pilot bearing or trans input shaft related though.

I'd start with an underside inspection of gear oil levels / signs of leakage and "U" joint condition first off.
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Old 11-08-2013, 10:18 PM   #3 (permalink)
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Yes I did the underside inspection. When it makes the noise, it feels like the driveline slips slightly. And audible from the rear portion of the vehicle. I will get someone to test it tomorrow while I am next to the vehicle. I disconnected the rear driveshaft and ran it in 4wheel hi and the noise was not present. Prior to removal it made the noise in all 3 transfer case positions. Thank you very much. Any other suggestions are very welcome. I don't want to tear apart anything that doesn't need to be
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Old 11-09-2013, 07:15 PM   #4 (permalink)
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Still looking for suggestions. I have searched the sight and the closest I have found similar was someone that crushed the side gear in the rear end. When I disconnected the driveshaft, the noise does not occur. Spider gear maybe???
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