okay, now i have a brain storm....if the flat flexplate was intended for the 4l80 and the torque conveter holes are different on that flat felx plate, why cant i just use my current converter and just machine the holes for the 4l60 converter? The bolts thread into the converter, not the flexplate.

Just throwing my thoughts out there...

edit: nevrmind i see what the 4l80 converter looks like... how much different is the convert shaft on the 4l80 compared to the 4l60?

 

So did you ever get this resolved?
What did you end up doing? I might have to do this as well.

 

If you have a 99/00 6.0 with the longer crank and plan to mate it to a 60/65E, you will need a custom torque converter to make it work. There are members here who have done it, no biggie. Just call Cirlce-D and talk to Chris, or Yank and talk to Dave, and tell them your dilemma and they can resolve it for you

 

there is another option also bud...what I did was bought a TCI flexplate that was for ls-4L60... now it wont fit when installed the way it says on the plate (engine side)....I called tcI and asked what the effects of turning it around for fitment purposes, they said there was not issue to do that...so thats what i did, the engine side of the flex plate faces the trans. I had to use long grade 8 bolts and 4 washers on each bolt to make up for the counted gap hole on the flex plate. I actualy put everything together backwards on how you usally would bolt the trans back to the motor. I bolted the flex plate first, then the TC to the flex plate, then the trans. the trick was aligning the trans and the TC key way!!!! thats the whole trick is getting those lined up before you start lifting the trans into place....

i have 4600 miles on this set up now, and no problems...Ive checked all bolts and tightness about every week and nothing has become and issue..

Summit Racing will have the TCI flexplate you are looking for, just make sure its for a truck and not and F-body

 

Very interesting, that's the first time that I've heard of that, cool deal

 

That sounds good. You dont remember a part number do you? Im going to see aboout trying this. And will post up if it works for me as well.


What torque converter did you end up using (the 4l60e or the original 4l80e unit)

thanks

 

Have there been any updates to this??? I will soon be having the same issue and would like to know if the flipping the flexplate works for an extended period of time? And if it was an OEM style with the recesses or a flat plate?

 

I know I'm way behind on this but (TCI Auto #399753) Was this your part number for that flexplate? Does it matter what gen of 4L60E you use? Or do you not know?