Who has a TH350 bolted to a '99 LQ4
#6
TECH Fanatic
Why waste money buying something you don't need???
You need the stock flat flex plate that came on the LQ4. Then redrill it for the TH350 verter. Since your LQ4 is the longer crank you DON'T need the spacer for the flat flex plate. If you don't have the flat flex plate just get the later 6.0L flat unit. It will have the spacer on it simply remove the spacer from the flex plate. The bonus is you can use the that spacer to align the flexplate to the verter to help mark the holes for drilling other than that its not needed.
You need the stock flat flex plate that came on the LQ4. Then redrill it for the TH350 verter. Since your LQ4 is the longer crank you DON'T need the spacer for the flat flex plate. If you don't have the flat flex plate just get the later 6.0L flat unit. It will have the spacer on it simply remove the spacer from the flex plate. The bonus is you can use the that spacer to align the flexplate to the verter to help mark the holes for drilling other than that its not needed.
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#18
TECH Fanatic
The flaxplate is usually in stock at the dealer ship for around $70. the GM flat flexplate part # is 12621399. My wife gave me mine for Christmas. I ovaled the holes and it works awsome!!!!!