A/T - Hard Lockup Engagement/Disengagement
Section4
Group
43
No.
0029
Year
00
Month
05
S70/V70-2000/V70XC-2000
1998-2000
Reference:
This service bulletin replaces the previous service bulletin SB 43-0029 from April 2000, which should be discarded.
Vehicles Involved:
Cars with AWD and AW 50-42/ AW 42 AWD
Purpose:
A new Service Bulletin due to corrected time allowance
Automatic transmission AW 50-42, hard lockup engagement and disengagement.
Background
Customer complaints regarding transmission lockup engagement / disengagement while driving at cruising speeds ( 90-100 km/h / 55-60 mph ) may be due to worn, overheated transmission fluid.
As service solution, the transmission should be flushed/refilled using new, clean transmission fluid, meeting DEXRON III G specifications.
Affected vehicles
Materials
Note!
The total volume ATF needs to be 16 litres.
Autom, Transm. AW50-42, harsh lock up engage and disengage on S/V70 AWD
Automatic transmission AW5042, hard lockup engagement and disengagement
1
Checking and adjusting the oil level
Check and adjust the oil level according to Checking oil level.
VADIS:
Section 4 Cleaning, checking and adjusting
Transmission
Checking the oil and line pressure
Checking the oil level
2
Fault-tracing
Faults which occur in the transmission but do not store any diagnostic trouble codes (DTC) can be mechanically fault traced by carrying out certain checks and adjustments.
Fault-trace in the following order.
Check the transmission fluid
Check the color. The color must be red or reddish brown. The color must not be pink or cloudy. (Pink and/ or cloudy oil means that coolant has entered into the transmission).
Check the expansion tank
Check that there is no transmission fluid in the radiator expansion tank (do not confuse it with black engine oil).
Corrective action
The following corrective action must be taken if coolant has entered the transmission:
Replace the transmission assembly according to VADIS
Replace the radiator including the extra cooler, if installed, and the hoses for the transmission.
Clean the expansion tank. Check and replace the expansion tank if necessary.
If coolant has not entered the transmission, flush and fill with new ATF Dexron III G according to the following method.
3
Preparations
Warning!
The oil may be very hot if the car has just been driven. Avoid skin contact.
Remove
- the battery and battery shelf
- the return hose on the control system (valve body) cover.
Install
- a plastic plug in the connection on the cover
- a transparent plastic hose on the oil return hose connection
Position a container for the oil with markings for the volume under the hose.
Temporarily reinstall the battery shelf and the battery.
4
Flushing the gearbox
Apply the parking brake. Move the gear selector lever to position P
Start the engine. Allow the engine to idle.
Switch the engine off when 2 quarts off oil have been pumped out or when air bubbles become visible in the hose.
Top up with 2 quarts of oil.
Repeat this 7 times.
Note!
16 litres ATF in total.
Start the engine again. Allow the engine to idle.
Check the color of the oil. When the color of the oil is clear red (as new oil), switch off the motor.
Connect the return hose to the control system (valve body) cover.
5
Checking and adjusting the oil level
Check and adjust the oil level according to Checking oil level.
VADIS:
Section 4 Cleaning, checking and adjusting
Transmission
Checking the oil and line pressure
Checking the oil level
6
Supplementary work
Reset DTC's
WARRANTY STATEMENT: Claims may be submitted under the New Car Warranty when there is a documented customer complaint, using claim type 01.