Originally Posted By gdonovan
Originally Posted By 451Mopar
PACT sells a heavy duty overdrive spring for $70. That and some good OD clutches along with the oiling mods to the shaft should support quite a bit of power?


A friend of mines 440 Duster is running 121 mph through the traps with a 518 with Ultrabell. Full street car with steel wheels and power steering.
Just a matter of time before it grenades. It's a shame Chrysler didn't build a better OD Unit. They were no doubt the weakest OD units of all Makes ever made. I know you can beef them up a bit but they won't take a beating especially behind a big block. Hell you can even make the Ford AOD stronger than the 518.I debated about putting a 200r4 behind my car but I was too proud to GM it. So I'm putting the 833 back in it.

Last edited by 70RT Charger; 10/05/15 03:42 PM.