1wheelthrills

Ok so I have a lt1 with a th350. I was told I needed a new flywheel to match the th350 converter so ordered a flywheel which turns out to be a 168 tooth. The starter that im trying to use now I believe is off a 4.3 motor with diagonal bolt holes and it grinds that starter pretty bad even after shimming. I've searched and searched and only seen one pwrson say the starter from a 99 tahoe should work but wasnt sure....does anyone know what starter I can use?

kline454

iTrader: (1)

Not sure why you changed flywheels unless you have the large pattern torque converter, Witch would be my guess, But I run a th350 with lt1 flywheel and starter.

1wheelthrills

I did this swap about 5 years ago and just getting back to it... i oreded all this stuff years ago when the swap was the thing to do and apparently got my info on the flywheel/starter from the wrong person...and yes I have the big bolt pattern converter and all that lined up right.

96capricemgr

iTrader: (1)

Which 4.3l do you think the starter is for? The L99 starter works perfectly on an LT1 and is basically just an older SBC starter whereas the LT1 got a gear reduction version. I would expect the 4.3l V6 starter to be the same as well seeing as it is just a 350 shorted two cylinders.

I suspect you are getting all kinds of confused here. You just need a starter meant for the flexplate you have. I think you have a 153 tooth starter on the 168 tooth flexplate. Buy a starter for a 168tooth gen 1 setup and you should be OK.

1wheelthrills

Being confused would be a understatement lol. We had a 99 tahoe sitting around so I took the starter out of it since it has the diagnol starter bolts and a 168 tooth flywheel...we got it to work after shimming it pretty good.