Originally Posted by Alwhite00

I have a "long crank" 1999 6.0 engine and I had a 2001 4L60E trans that I wanted to use in my 67 Chevelle. I could not find any really good info other than ordering a custom torque converter. I started measuring and the 6.0 crank & 5.3 crank had the same ID for the TC - I then measured the ring gear to the rear block face and they were identical from the 5.3 to 6.0. The 5.3 has a dished flywheel and the 6.0 a flat fyywheel.

I held up the 5.3 TC to the 6.0 crank and flywheel and it would not mate up as the snout on the TC bottomed out. I guestimated the distance that it was from bolting to the flywheel was about .200"

I made 3 .250" spacers that I welded to the flywheel after elongating the holes slightly to match the 5.3 TC - then I drew up some spacers and CNC'd them to fit between the engine & trans to make up the .250" difference. This thing bolts together like stock. I am happy as I do not have to hunt down a unobtanium trans or TC - I am sure there are other ways but this worked great for me and didn't cost me much as I did it on my break at work.

Just thought i'd share and maybe someone can take something from this. Don't mind the grease, Will get torn down & detailed before install.

Spacers welded to 6.0 flywheel.


Flywheel & trans spacers. I made it two piece as I didn't need a huge chunk of steel the.


Engine, Trans & spacers.