Suburban 1/2 Ton 2WD V8-5.3L VIN T (2004)
A cracked 1-2 accumulator piston (56) that is allowing fluid to leak by.
Mislocated/Missing valve body-to-spacer plate check balls (61).
When attempting to correct a consistent harsh 1-2 shift, the four conditions listed above should be inspected as possible causes. It is important to also
refer to the appropriate Service Manual for further possible causes of this condition.
