SRTA PROGRAM 700R4 TRANSMISSIONS
VEHICLES AFFECTED: All with 70OR4 Transmissions
We are pleased to announce the availability of 70OR4 service replacement transmissions through the General Motors of Canada Parts Department.
This new program, called SRTA for Service Replacement Transmission Assembly, is designed to reduce customer downtime and comebacks. SRTA units are remanufactured to the latest production specifications by a select group of authorized General Motors suppliers. All durability and pleasability improvements are inclucied in the units and they are extensively pretested to comply with original equipment standards. The use of these SRTA units provides GM customers with the latest production refinements in a replacement transmission.
SRTA is a customer satisfaction driven program designed to quickly repair the vehicle correctly the first time with confidence.
You, your customers and your zone service personnel will have the option of SRTA usage or bench overhaul.
The SRTA units are acceptable for Warranty repairs. Normal Warranty procedures apply, and the applicable labour time guide is to be used.
For Service Replacement Transmission Assembly part numbers and application refer to the SRTA Application Guide forwarded to your Parts Department.
Service Information
Cooler Line Flushing
In a major transmission failure, where particles of metal have been carried with the oil throughout the transmission, it will be necessary to flush out the oil cooler and connecting lines. To flush the oil cooler and lines use the following procedure:
1. Disconnect both cooler lines from the transmission.
2. Place a hose over the end of the cooler inlet line (from the bottom of the cooler) and insert the hose into an empty container.
3. Flush clean oleum solvent or equivalent through the return line (from the top of the cooler) using an oil suction gun untill clean solvent comes out of the hose. This will 'back flush' the cooler.
4. Remove the hose from the inlet cooler line and place it on the return line.
5. Flush clean oleum solvent or equivalent through the inlet line until clean solvent comes out the return line. Remove remaining solvent from cooler with compressed air applied to the return line and flush with transmission fluid.
6. Reconnect oil cooler lines and torque nuts to 17 N.m (12 ft. lbs.)
IMPORTANT
If the oil cooler is not clean the transmission may experience a condition of stuck valves and premature problems. To prevent this condition, it is necessary to do the following after installing the transmission.
1. Before hooking the cooler return line to the transmission, hold a container under the line and start the vehicle for a few seconds. This will determine whether there is adequate lube flow
2. Next, install a temporary in-line filter, part number 25011159, in the cooler return line and attach the line to the transmission. Road test the vebicle for a few miles. This filter will trap any contaminates that come out of the cooler and keep the transmission clean. After the test drive, remove the filter and install a compression union in its place. This procedure will prevent stuck valves and the filter can be reused.
Manual Linkage
Manual linkege should be adjusted so that the engine will start in the Park and Neutral position only.
TEXT ZONE
With the selector lever in the Park position, the parking pawl should freely engage within the rear/reaction internal gear lugs or output ring gear lugs. The pointer on the indicator quadrant should line up properly with the range indicator in all ranges.
If the linkage is not adjusted properly, an internal leak could occur at the manual valve which could cause a clutch and/or band failure.
CAUTION:
WITH THE SELECTOR LEVER IN THE 'PARK' POSITION, THE PARKING PAWL SHOULD FREELY ENGAGE WITHIN THE REAR/REACTION INTERNAL GEAR LUGS OR OUTPUT RING GEAR LUGS AND PREVENT THE VEHICLE ROLLING, WHICH COULD CAUSE PERSONAL, INJURY.
If adjustment is necessary use the procedure outlined in the applicable Service Manual.
Transmission Oil Fill (70OR4 Automatic Transmission)
1. Oil level is to be at the 'full mark' to minus 6.4mm below 'full mark' with transmission oil at operation temperature 80 DEG to 90 DEG C.
a. At first engine start, fast idle (1000 RPM Min.) for one (1) minute minimum with transmission in park or neutral position to circulate oil.
b. Adjust oil level so that level is between two dimples located below the add mark as shown.
2. Car must be on a level surface, engine idling, in park or neutral range, when correcting level and rechecking.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
