Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Fluid Pump: All Technical Service Bulletins
A/T - Updated Oil Pump Assemblies
Number:
88-56
Section:
7A
Date:
Sept., 1987
Subject: NEW PUMP ASSEMBLY VANE RINGS
THM 700-R4 THM 200-4R
Model and Year:
1981-88 PASSENGER CARS AND L.D.
TRUCKS EQUIPPED WITH EITHER THM 700-R4 OR THM 200-4R TRANSMISSIONS
TO:
ALL CHEVROLET DEALERS
New transmission oil pump assemblies with Nodular Iron Vane Rings entered production April 28, 1987 (Julian date 118) on THM 700-R4
transmissions. This change also applies to SRTA.
FIGURE 1 - THM 200-4R AND THM 700-R4 TRANSMISSION IDENTIFICATION INFORMATION
Beginning June 17, 1987 (Julian date 168) all THM 200-4R began production with the new rings. (Refer to Figure 1)
