Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Transmission Cooler: All Technical Service Bulletins
A/T - Cooler Replacement/Flushing
BULLETIN NO: 93-7A-97
SECTION: 7A Automatic Transmission
NUMBER: 14
CORPORATE REFERENCE NO: 367102R
DATE: July, 1993
SUBJECT:
Information on Automatic Transmission Cooler Replacement
MODELS:
1993 and Prior Light Duty Trucks Equipped with Automatic Transmissions
When inspection of an inoperative automatic transmission reveals metal material in the oil pan, the transmission oil cooler (located in the radiator end
tank) must be replaced. The cooler lines must also be flushed to prevent any debris from entering the transmission oil cooler or the transmission.
If inspection reveals friction material or fluid contamination (but no metal), the transmission cooler must be flushed and a flow check MUST be
performed. It is essential to flush the cooler after SRTA installation, major overhaul, in the case of pump or torque converter replacement, or when fluid
contamination is suspected. Use Kent-Moore tool J35944 and solvent J35944-20 to flush the cooler. Follow the instructions published in each Service
Manual, Section 7A, On Vehicle Service, Transmission Cooler Flushing.
SERVICE PARTS INFORMATION
Refer to section 4.128 of the appropriate GMSPO parts catalog for transmission oil cooler applications.
WARRANTY INFORMATION
For vehicles repaired under warranty, use:
Note:
If transmission is to be replaced with SRTA, do not use ADD condition H (To Replace Transmission Oil Cooler - 0.7 hr). Labor Operation K7000
(Transmission Assembly Replace) already includes 0.7 hr (for transmission cooler flush).
