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Toyota SUV's & Trucks Discussion of Toyota Pickup Trucks and 4-Runner SUV's

 
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post #1 of (permalink) Old 01-17-2013, 04:56 PM Thread Starter
Tas
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New noises

Hey everyone, it's been a long time! Hopefully there are still some experts on here that have gone through this:

My toy is an '82 4x4 longbed, with an '86 22R and a 5 speed manual tranny from a 4 runner of unknown year.

This all started quite a while ago with kind of a deep, constant moan-like sound when driving on the highway in 5th. Didn't seem to effect performance, so I simply ignored it. Last week, I had to go over the pass to the beach for a school residency, and noticed a new noise while there: a very slight pinging sound in 1st or 2nd gear, almost imperceptible, but there. It almost sounded like the flywheel was hitting the starter selanoid intermittently, but I don't see how that's possible. Also, sometimes when I put it in gear from a stop and released the clutch, there was a loud ping, sounding like someone tapped the drive shaft once with a hammer. Weird. Then, once I got back over the pass and into my hometown again, just a few miles from my house, I noticed yet another noise: another kind of deep, moaning sound when I let off the gas in first or second gear and let the engine rev down. This seems to be accompanied with more rolling resistance and vibration then normal, but I can't place the source. Once home, I crawled under the truck and tried moving and wiggling the drive shaft near both u-joints to see if they're going bad, but the thing is rock solid. I've had to replace the throw-out bearing twice, and these sounds /symptoms don't really remind me of those days. Any thoughts? Pumpkin issues maybe? A bearing on the rear differential possibly? Transmission failing? I have no clue.

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post #2 of (permalink) Old 01-18-2013, 12:46 PM
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well, my first guess was u joint. did you check for play in neutral with the brake set? did you double check the front shaft as well? check pinion for play. is there much freeplay in the axle when rotating driveshaft? sorry, i couldn't be more help.
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post #3 of (permalink) Old 01-18-2013, 12:51 PM Thread Starter
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Thanks for the info Stump runner. I will check the whole thing again after reading this.

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