I have a 95 4.3 auto 4X4 thats makin a knockin sound. I comes from that plate over the flywheel/torque converter area. Doesnt seem to be hurting anything but its pretty loud. Its a constant knock no matter what gear park drive everything and it speeds up with the rpm any ideas?

 

It cound be a cracked flywheel. I had a 86 s10 that was knocking and the flywheel was cracked around the bolts where it mounts to the crankshaft.

 

It is very noticable when next to a wall like in a fast food drive through isn't it? The noise is more than likley the flexplate. They are notorious for cracking around the center where they bolt to the crank.

 

Yeah its real loud next to a building thats prolly what it is I guess how hard are they to put in? I had a heck of a time just tryin to drop the tranny pan to change the filter....wonderful design

 

A transmission (motorcycle) jack makes things alot easier. Also helps to have some long socket extensions. Its not too hard... Just plan to have a Saturday free to do it.

 

Good I should be able to handle that a saturday in the shop with a few buddys and some beer. Sounds like vacation. Preciate the help man.