A/T - Early Upshift/No Kickdown
TRANSMISSION: 440-T4/4T60BULLETIN: # 070
SUBJECT: Early Upshifts
APPLICATION: GM
DATE: September 1991
440-T4/4T60
EARLY UPSHIFT - NO KICKDOWN
A mismatch may be created during the replacement of either the valve body or spacer plate. The result can be a lack of T.V. pressure which can cause upshift and no kickdown.
Measure the diameter of the 2nd land on the T.C.C. Regulator valve (See Figure 1).
IF LAND # 2 MEASURES .387 DIA. THE SPACER PLATE MUST HAVE THE HOLE SHOWN BY THE ARROW.
IF LAND # 2 MEASURES .335 THE SPACER PLATE MUST NOT HAVE THE HOLE SHOWN BY THE ARROW.