Hi all, looking for information on the case casting numbers on the 4t40E.
Example= B23, B4, B7. What do they mean?
Also looking for a data breakdown of metal tag codes.
It maybe in the 4T40E performance rebuild trend on the trans forum.
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
