A/T - Harsh Shifts/False Neutrals/Shift Flare
NO: 43-53DATE: 11-09-2007
MODEL/YEAR:
2005- for XC90 V8
2006- for S60R/V70R
2007- for XC90 3.2 & S80
SUBJECT:
TF80-SC, 6 Speed Automatic Transmission Fault Tracing Tips
REFERENCE:
VIDA, TNN 40-02
Note:
This TNN supersedes the previous 43-53, dated 12/21/2006. Information about speed sensor and valve body faults has been added. Please update your files.
This document summarizes customer complaints related to the 6 speed Automatic Transmission (TF80-SC) and should be used together with the information in VIDA.
Valve Body: The Valve Body should be replaced to address the following symptoms:
1. Customer complaints about 2-3 upshift quality. The shift may be described as harsh, or as a shudder. The symptom is usually more apparent during the first few minutes of driving after a cold start.
2. Customer complaints of shudder when slowing down, just before coming to a stop. The symptom may also be described as a harsh downshift just before coming to a stop.
3. Neutral condition in 4th, 5th & 6th gear; normal behavior in 1st, 2nd, 3rd & Reverse. One or more of the following DTCs (Diagnostic Trouble Codes) may be present in the TCM (Transmission Control Module): P073400, P073500, P072900, P089600.
4. Neutral condition in all gears except 5th & Reverse, usually with TCM P273300 set. DTCs for gear ratio(s) may also be set such as TCM P073000, P073100, P073200, or P073400.
5. Customer complaints of engine RPM flare at upshift or power-on downshift (kickdown) due to a worn modulator valve bore.
Note:
Transmissions starting with serial number 06J and later already have the latest valve body which is designed to prevent these symptoms.
Speed Sensor Faults
The customer may complain of the transmission being in limp home mode (stuck in high gear) and/or have message in the DIM (Driver Information Module). Several DTCs may be set to due an open or short circuit in one or both of the speed sensors or the connectors going to them.
Possible DTCs for an input speed sensor fault: TCM P071500, P071600, P071700, P071800, P215800, 0022, 0023, 0024, 0087, 0088, ECM/TCM P070000 (MIL request).
Possible DTCs for an output speed sensor fault: TCM P050000, P072000, P072100, P072200, P072300, 001E, 001F, 0020, 0082, 0083, ECM/TCM P070000 (MIL request).
In the case that the input speed sensor needs to be replaced, it can be replaced separately however the output speed sensor cannot be replaced without complete gearbox replacement.
Note:
Transmissions starting with serial number 06M and later already have the latest process changes, which is designed to prevent these speed sensor related symptoms.
Electrical Connector:
Pins that are bent, have backed out of the connector, or have low tension are a common cause for intermittent or permanent communication problems with the TCM, as well as DTCs such as CEM (Central Electronic Module) 1A61, TCM U000100, ECM (Engine Control Module) U010100, ECM P070000, ECM P085086, ECM P216262, ECM P050087. The most common place to find a fault is 54/57.1 which is an 8 pin gray connector joining the TCM jumper harness to the engine bay harness. 2005 XG90 V8 & 2007- XG90 3.2 cars use this connector; the other variants do not.
If a careful visual inspection does not reveal any faults, check the tension of the female pins by using male pin PN 30656636.
TCM locked/stuck/off-line during software downloads:
The TCM can occasionally become locked, stuck or stop communicating during a software download. When this happens, the lights on the shifter will be out & the gear position will not be displayed in the DIM. This happens most commonly during a TCM Upgrade, but could happen during other downloads as well. To recover the TCM, perform a CEM reload, then a TCM reload.
TCM failures:
Any one or combination of the following DTCs indicates a faulty TCM: P096100, P096500, P096900, P273700, P271900, P272800.
Auxiliary cooler, XC90 V8:
XG90 V8 customers in very hot climates who are towing a trailer or making repeated accelerations may wish to add an additional transmission oil cooler (PN 30776304).
Installation instructions are found in VIDA (Repair > Installation Instruction, Accessories > Group 26).
Excessive rustproofing: appearance of oil leakage:
A drip of fluid may be seen under the powertrain where the engine and transmission meet.
This fluid is rust protection used on the torque converter during production. No action is needed.
Oil level:
Since an 'overflow tube' is used instead of a dipstick, there is a unique procedure for checking the oil level. Low oil level will result in slippage, especially after stopping and/or turning. TCM DTC P073000 and others may be set.
1. Beginning with a cold transmission (below 50°C/120°F oil temperature), remove the lower engine cover, the air snorkel & the air cleaner with the MAF (Mass Airflow Sensor) & ECM.
2. Remove filler plug (Torx 55) and place a clean funnel in the filler hole.
3. Temporarily install the air cleaner with the MAF & ECM so that the engine can be started.
4. Start the engine & leave it running for steps 5-9.
5. Move the shifter from P to D. Stop at each position for at least 2 seconds. Do this twice.
6. With the shift lever in P, raise the vehicle and place a receptacle under the transmission.
7. Remove the level plug (Torx 40). Lower the vehicle & add oil to the transmission until it starts to run out of the level plug hole beneath the vehicle.
8. Allow the transmission to warm up by letting the engine idle in P. During this time, some oil will be running out.
9. When the oil temperature reaches 50°C/120°F, reinstall the level plug & turn off the engine.
10. Reinstall the filler plug (Torx 55). Install the lower engine cover, the air cleaner correctly & the air snorkel.
A full version of the oil level checking procedure, can be found in VIDA. Note that it is not necessary to remove the air cleaner & ECM on S60R/V70R.
Interpreting the Serial Number:
The serial number is on the black & silver metal ID plate on top of the transmission.
The first two digits indicate the year: 04 = 2004, 05 = 2005, 06 = 2006, etc...
The 3rd digit indicates the month: A = Jan, B = Feb, C = Mar, etc...
On vehicles with the 3.2 liter engine, the ID plate is difficult to see because it is located under the power steering pump. The production year & month can instead be read off of the white sticker located on the transmission case directly below the brake master cylinder.
Note:
Refer to TNN 40-02 for applicable TCM software upgrades for certain drivability complaints and/or DTCs. Not all drivability complaints and/or DTCs can be fixed by TCM software so VIDA should be used to properly fault trace DTCs while other TNNs can be used to remedy certain drivability complaints and/or DTCs. In the case that the complaint is not directly addressed by software and once the cause of the complaint is corrected, TCM and ECM software upgrades should then be attempted to be sure the ECM/TCM have the latest software.