Exedy 350 for a 3650 and a stock Coyote flywheel
I'm going to guess you over extended the slave,
It's a bit of a PiTA but you need to pull the FW/clutch and take some measurements to see if you need to shim the slave.
Measure the top of the crank flange from the block flat surface. Not sure what the Coyote is but on the cast 3v crank the flange was .15" .. Kellogg crank , .19"
Torque the PP down on a bench and measure the PP finger height. Depending on the FW that measurement can vary quite a bit. I had a Mach500 and the finger height measured 3.125" on a RAM billet steel FW.
Install the new slave on the tranny, Put a straight edge across the front of the transmission and measure from the front of the trany to the top of the slave.
I use the SACHS SB60225 slave. It measures 2.65" from the face of the tranny. Measure the separator plate and add that to the 2.65" 3v 3650 plate is .07"
Slave depth is then, 2.72"
Calculate the preload, , [PP finger height+crank flange is how far the clutch sits back in the bellhousing] - slave depth..
In my case.. [3.125"+.19"]= 3.315"-2.72" = .595" preload on that setup.
For comparison I used an ACT clutch on the OE 3v FW and found out the hard [$$$] way it was way too shallow on the cast crank.
[3.05"+.15"]-2.72= .480"= Overextended slave ..
I popped 2 before one of the guys I work with told me how the LSx world needs to run shims under their slaves.
You don't want less than .500" , for added margin, I use .525" to be the minimum.
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