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05-14-2015, 01:16 AM | #1 |
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Join Date: Feb 2012
Location: Beautiful BC, Canada, eh?!
Posts: 2,265
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Left-turn snapping noise - Ideas??
'77 Silverado, 350/th350.
There is what sounds like sheet metal being caught in a driveshaft, but only when I turn moderate to hard left turn only. Only there is no sheet metal in the driveshaft. I ~think~ I can feel it in the steering, but I might be fooling myself. Usually sounds like it is coming from under the floor, other times it sounds like the front wheel area, and sometimes from the rear axle area. Not at all useful, I know. It also seems to be related (or more easily instigated) by bumps on the road. Here is what has been done, not all related to chasing the sound - just what has been done, none of which made a difference: 350 fully rebuilt 2500-stall converter added, "tamed" B&M shift kit, fresh fluid Headers, x-pipe, and dual exhaust installed Heat shields removed (cat is gone) Poly engine and trans mounts Poly cab mounts Poly suspension bushings (front and rear) New 1-ton coils BellTech spindles Upper a-arm bolts checked for tightness Lower a-arms moved forward 3/4", cross member rail clearanced Flip kit, both via bracket and via welded spring perches New U-bolts Rear shock extenders New shocks (front and rear) Box mounts inspected, bolts replaced Rear brake drums turned to remove any corrosion on the edges Front hubs cleaned and bearings re-packed Fuel tanks removed and truck tested to see if they were contacting anywhere Control arms trimmed for wheel clearance Fenders checked for tire clearance Front brake calipers and dust shields checked for clearance I cannot find any contact at all anywhere. Another funny thing, is sometimes it is worse when cruising around 35mph in 2nd, even on the straight. It is also usually much worse when pulling my utility trailer. Honestly, I'm not sure where to look, and I'm hoping someone might have some magical experience like this and might know what tree I need to bark up. Thanks.
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