Noise under load, cracked flex plate? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

powell72 · 04-20-2009, 10:30 PM

My truck has started making a tinging noise, almost like rocks rolling around, when it's under load. It occasionally does it at idle, it's coming from the very back of the motor/front of tranny. I can hear it very well underneath. It isn't consistent with rpm. Does not sound like a rod knock. I removed the inspection cover and didn't see any cracks, but I heard they crack around the mounting bolt holes. I put a new one in when installed the tranny four years ago. I've never encountered a cracked flexplate before, does this sound familiar to anyone who has had this happen? Am I one the right track?

04-20-2009, 10:30 PM	#1
powell72 Senior Member Join Date: Jan 2005 Location: Loveland Co. Posts: 3,098	Noise under load, cracked flex plate? My truck has started making a tinging noise, almost like rocks rolling around, when it's under load. It occasionally does it at idle, it's coming from the very back of the motor/front of tranny. I can hear it very well underneath. It isn't consistent with rpm. Does not sound like a rod knock. I removed the inspection cover and didn't see any cracks, but I heard they crack around the mounting bolt holes. I put a new one in when installed the tranny four years ago. I've never encountered a cracked flexplate before, does this sound familiar to anyone who has had this happen? Am I one the right track? __________________ Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html

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