zraffz

iTrader: (1)

I picked up a 2005 2500HD with a broken flex plate. It's not just cracked, it's completely broken around where the crank bolts to it.

This flex plate did not have a spacer on it. This is defiantly a Gen IV 2005 LQ4 with the newer head bolts and LQ9 rods. Did any of the LQ4s with the 4L80E not get a spacer or did some clown forget to put it back in?

The bellhousing was defiantly separated on this truck before so I don't know who did what to it but the flex plate is ruined, the bolts loosened up and it broke apart.

Gadgetized

iTrader: (9)

It should have the spacer on it unless they swapped an earlier crank in it. The spacer is about .400" long so it is quite noticeable how much frather it sticks past the cover.

zraffz

iTrader: (1)

That crossed my mind. I can't possibly see the torque converter sitting .4" forward without stripping the splines off the front pump on the trans. But I didn't check for play before removing the motor.

Does anybody know how long a late style crank is vs the earlier style so I can measure it?

Gadgetized

iTrader: (9)

Is the flange on the back of the crank flush with the seal on the rear cover?

zraffz

iTrader: (1)

Looking at pictures it looks like the crank is about flush with the outer most part of the rear cover (the area directly around the seal). It defiantly isn't almost half an inch out. I'd say it sits approximately where a crank in a small block sits.

So I guess this answers my question and explains why the flex plate blew apart. I'm just very shocked it the splines in the converter didn't chew up the splines on the front pump!

Gadgetized

iTrader: (9)

Yeah it might have caused damage. Also check to see how the starter engages.

Gadgetized

iTrader: (9)

Buy this before someone else does.


https://www.performancetrucks.net/fo...e-sale-539303/

zraffz

iTrader: (1)

I picked one up off another member earlier today. Apparently I have a spacer on the back of the crank, I overlooked it earlier when I removed the crank. I am used to the Gen I and II small blocks, big blocks and did a trans and flex plate in a 5.3 but this is my first 6.0 build so pardon my ignorance with some of this!

Thanks for all your help