Cracked flexplate vs Trans going out
#1
Cracked flexplate vs Trans going out
Nasty loud buzzing/grinding noise coming from underneath the truck, and seems to be from the trans area while driving. Anything more than light throttle input gives the noise which will last about a second or two then go away. Didnt get on it at all for fear of having to be towed again. Seems more like trans to me? Also entertaining the idea a cracked stock flexplate. Motor seemed to be okay but you never know. Thanks.
#3
Just an update, I pulled all the turbo stuff off from the underside and removed the converter inspection cover. The flexplate appears intact. So the noise could still be the transmission or the torque converter but I'm leaning towards the trans. Noise only happens once everything get well up to temperature. From the dipstick the trans fluid is cherry red, smells normal. Next step I will drop the trans pan and see if there's anything going on in there like metal debris or a clogged filter. Thought I could get away with a stock 4l80e, guess not.
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