Hey all,
I got the SM420 trans and a 3:54 ratio. Engine is a 327.
I have gone through the tranny and all looks good but this thing really whines and rattles! At 65-70 mph it is just absurd how loud everything is and how revved the engine seems to be. It is in 2hi (NOT 4wd) and at 70 mph I am running about 3000 RPM.
My Question- What is a better transmission to put in there with the 3:54 ratio so this ole girl will quiet down enough to hear some Hank Sr. while driving down the highway?
Thanks
Shane Hamilton
Warrensburg, MO
