lxcoupe

iTrader: (8)

I'm putting a 6L90 behind an LS3. I'll be using an LSA converter (with 3 bolts). Can I use a 4L60 flexplate off, say a 2003 Tahoe 5.3/4l60? I thought I read a post that said they were interchangeable. Reason I ask is I have a 4L60 flexplate kicking around that I'd love to use.

FormulaBoat

iTrader: (1)

L80 and L60 same. Not sure of L90, your post doesn’t match the title.

dr_whigham

iTrader: (49)

Yes it will work. As you said, 3 bolts though instead of 6 (I personally don't like that idea)

The one you can't use the 4L80 flexplate. It's not dished and wont fit the LSA converter.