A/T - 700R4 Correction To Bulletin SIL8722

CORRECTION TO:...SIL 87-22 (July)

SUBJECT: HYDRAMATIC 4L60/THM 700-R4

The following casting number information may be helpful in determining if the pump assembly being used is a matched set. To find these numbers, look at the casting of the pump cover and pump body. See Figure 1.

YEAR PUMP COVER PUMP BODY

82-83 8642031 8642380

Early 84 8654025 Small turbine shaft bushing
Corrected number. 8642380

Late 84 8654025 Large Turbine shaft bushing
Corrected number. 8642380

85 8654304 8654303

Early 86 8654304 8654732

Late 86 8663570 8654732

Early 87 8663570 8654732

Some of these pumps will have 10 Vane Rotor

Late 87 8663570 8654732

All pumps have 10 vane rotor. Cup plug beside filter inlet removed only on models with auxiliary valve body.

(Information courtesy Hydramatic Division, GM)