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Old 08-20-2011, 01:33 PM
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79 scottsdale noise

i have a 79 scottsdale with a np 203 transfer case and th350 tranny...all i do is drive it in town as its my work truck and when i let off the gas i can wait a few seconds and hear a whining sound...sounds like its a "trying to wind down" sound. an clues as to what the sound may be and what a cure for it would be...also what is it gonna tear up?

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Old 08-20-2011, 08:13 PM
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Sounds like a rear end making niose, try to isolate noise, and if it is comeing from the rear end pull cover and check for metal in oil.
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Old 08-21-2011, 07:20 AM
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The NP203 is chain driven, and it may just be a worn chain. There are chain replacements available, or there is also a "chain-saver" that is supposed to help take up the slack without completely replacing the chain. My experience has been that it will operate noisy for many years without actually breaking anything. Just make sure its full of 10w30 oil, not gear oil.

Also check out the front driveshaft and its cardan (CV) joint and slip joint. Both need periodic lubrication, but seldom get it. I had to have my front driveshaft rebuilt because the slip joint had frozen. It made quite a few clunking noises as the front end loaded and unloaded during acceleration, without being able to let the driveshaft length self-adjust for the change in axle position

Bruce
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