1fast70

I'm getting my 5.3 that came from an early 2007 Chevy truck (classic body style) ready to go in my 1970 Chevelle. I'm using an Advance Adapters TH-350 adapter flexplate. This kit includes a bushing that installs in the crankshaft to support the TH-350 torque converter. My crankshaft has an unusual insert in the rear flange that doesn't appear to be any type of thrust bearing I have ever seen. I have asked some knowledgeable local people who have worked on a lot of LSx stuff, and they have never seen anything like it.

Can anyone identify this part. I have tried to use a MAC tools slide-hammer type of pilot bearing remover and this piece won't budge, and I don't want to get too crazy with the slide hammer as I don't want to hurt my thrust bearing.

Any suggestions on what this is and how to remove it would be very much appreciated!

NHRAFORMULA00

iTrader: (2)

Its some kind of adapter that comes with a new TCI flexplate.Maybe for a turbo 350 -400 conversion.I know that 1 came with my flexplate,but was not used.

1fast70

I forgot to mention this engine came from Spalding Auto Parts, and is bone stock. So this part is a factory installed piece. That's what makes it odd.

mark21742

Best way to get it outmay be to use some heat, but don't know if I would do it myself.
I'd take it to a machine shop and let them pull it out