gtuplin

Well I am here I might as well post one more concern that has been bothering me!!
A few weeks back I had a car in that presented a strange noise at the trans converter flex plate area. I thought that perhaps a crack in the flex plate was the suspect but found that the end play in the crank was huge!! Way more than spec few thousands so pulled the pan and found #3 main thrust bearing worn completely out. I replaced it and checked all other bearings for premature wear but no other issues.Car runs great and noise is gone but I am concerned that there is an underline problem, I have considered trans issues but no codes and it works great.
Has anyone run into this premature wear of the trust bearing? thoughts on causes?

Bert

The only ones I saw with many problems were the older Chev with 454 engine would wear the front side out due to the fact that the torque convertor would swll up like a baloon when hot and put a strain on the front thrust bearing. Nothing on them. Which side was worn the most?

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Bert

gtuplin

Well both sides showed excessive wear but the rearward side (transmission side) was worn more but hard to tell at what point it all started! It was very bad in my eyes and I would give it a total of 4mm travel forward and rearward. .The oil groves were gone from the bearing thrust side. Thought the crank was to blame but installed the new main and it was right in spec for thrust
I have seen the diesel pickup trucks do this when people install the mighty performance cluch packs, and have heard of torque converters out of ballance causing this but normally other problems arrise from that.
No, not sure what to think because the car runs and drives perfectly now. Perhaps just a bad bearing! Still bothers me to not knowwhy things go wrong!

Bert

I sure understand your concern. Probably the only thing you can do is check the endplay in a few thousand miles to see if it's wearing again. Makes you wonder if the front pulley is out of line too.

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Bert

gtuplin

I will be seeing the car at oil change intervals so will keep an eye out to see if it changes.