21-012-14 REV. A

NUMBER:
21-012-14 REV. A
GROUP:
Transmission and
Transfer Case
DATE:
July 09, 2014
This bulletin is supplied as technical information only and is not an authorization for repair. No part of this publication may be reproduced, stored in a retrieval system,
or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise, without written permission of Chrysler Group LLC.
THIS BULLETIN SUPERSEDES SERVICE BULLETIN 21-012-14, DATED APRIL 25,
2014. INTERNAL ATTRIBUTES HAVE BEEN UPDATED TO ALLOW ADDITIONAL
APPLICABLE VEHICLES. THERE ARE NO CHANGES TO THE CONTENT OF THE
SERVICE BULLETIN.
SUBJECT:
Transmission Shift Enhancements - Adaptation Drive Learn Procedure
OVERVIEW:
This bulletin involves performing a subjective shift quality rating when customers
experience poor shift quality and if necessary, performing the transmission adaptation
learn procedure. In addition, this bulletin involves performing transmission adaptation learn
procedure when the transmission is repaired/replaced and/or the valve body/TCU
assembly (mechatronic) is replaced, or when the adaptation memory cells are cleared with
the wiTECH diagnostic scan tool.
MODELS:
2013 - 2014
DS
Ram 1500 Pickup
2012 -2014
LD
Charger
2012 -2014
LX
300C
2014
WD
Durango
2014
WK
Grand Cherokee
NOTE: This bulletin applies to vehicles equipped with the 845RE (Sales Codes DFL),
8HP45 (Sales Codes DFG), or the 8HP70 8-Speed Automatic Transmission
(Sales Codes DFD).
DISCUSSION:
The 845RE, 8HP45, or the 8HP70 8-Speed Automatic Transmission uses a sophisticated
shift algorithm that includes learned information so that the shift quality remains excellent
even as the transmission wears. This learned information is recorded in memory cells
referred to “Adaptation Memory Cells”. Each applied clutch records the amount of time it
takes to fill the clutch (Fast Filling Counter/Filling Time) and the amount of pressure (Filling
Counter/Filling Pressure). The adaptation memory cells are set to zero (0) on every new
transmission (new in vehicle and/or replaced for service) and when the transmission
control module is replaced for service. In addition, the adaptation memory cells are set to
zero (0) when the transmission control module adaptation memory cells are cleared using
21-012-14 REV. A
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the wiTECH diagnostic scan tool. Until the adaptation has been learned/relearned, the
transmission shift quality may not meet the customers expectations.
NOTE: Anytime the transmission has been overhauled (unless the valve body/TCU
assembly (mechatronic) was replaced), the adaptation memory cells must be
cleared using the wiTECH.
The adaptation memory cells appear on the wiTECH for every clutch. Each clutch will
include:
•
•
•
•
Fast Filling Counter = the number of filling time events that has taken place
Filling Time = +/- number of ms (milli seconds) from zero (standard set value).
Filling Counter = the number of filling pressure events that has taken place
Filling Pressure = +/- mb (millibar)/PSI (Pounds Per Square Inch) from zero
(standard set value)
If the adaptation memory cell “counter” is zero (0), than the adaptation memory cell has not
been updated. The, Filling counter ideally should be at least 12 (6 on 8HP70/90) and Fast
Filling counter at least 4 (2 on 8HP70/90) to improve shift quality and with each
subsequent count, shift quality will improve even more.
Typical wiTECH Display of Adaptation Memory Cells
Graph
Name
Value
Unit
Type
Clutch A- Filling
Pressure
0
PSI
Sensors
Clutch A- Filling
Counter
6
Counts
Sensors
Clutch A- Filling
Time
0
ms
Sensors
Clutch A- Fast
Filling Counter
2
Counts
Sensors
Clutch B - Filling 0
Pressure
PSI
Sensors
Clutch B - Filling 6
Counter
Counts
Sensors
Clutch B - Filling 0
Time
ms
Sensors
Clutch B - Fast
Filling Counter
Counts
Sensors
Clutch C- Filling 1
Pressure
PSI
Sensors
Clutch C- Filling 6
Counter
Counts
Sensors
Clutch C- Filling 18
Time
ms
Sensors
Clutch C- Fast
Filling Counter
Counts
Sensors
2
2
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21-012-14 REV. A
Clutch D- Filling 1
Pressure
PSI
Sensors
Clutch D- Filling 6
Counter
Counts
Sensors
Clutch D- Filling -6
Time
ms
Sensors
Clutch D- Fast
Filling Counter
2
Counts
Sensors
Clutch E- Filling
Pressure
2
PSI
Sensors
Clutch E- Filling
Counter
6
Counts
Sensors
Clutch E- Filling
Time
2
ms
Sensors
Clutch E- Fast
Filling Counter
3
Counts
Sensors
SYMPTOM/CONDITION:
Customers may indicate that their transmission shift quality does not meet their
expectations.
DIAGNOSIS:
Perform “REPAIR PROCEDURE A” anytime the Transmission is replaced, Transmission
has been overhauled, valve body/TCU assembly (mechatronic) is replaced, and/or the
adaptation memory cells have been cleared with the wiTECH.
Perform the “EIGHT SPEED TRANSMISSION SHIFT QUALITY DIAGNOSIS” anytime a
customer indicates that their shift quality does not meet their expectations.
EIGHT SPEED TRANSMISSION SHIFT QUALITY DIAGNOSIS
To ensure that the process is repeatable, dealers should perform the following
recommendations:
•
•
Identify specific employees to perform the Subjective Shift Quality Analysis. These
employees become the Qualified Subjective Shift Quality Auditors.
Each Qualified Subjective Shift Quality Auditor should drive approximately five
8-speed vehicles to establish a baseline for the shift quality of each shift as received
at the dealerships.
NOTE: This evaluation and procedure MUST NOT be done while the vehicle is still in
Shipping Mode. Place the vehicle in Customer Mode prior to performing.
1. Using the wiTECH, check for active Diagnostic Trouble Codes (DTC) in the
Transmission Control Module’s (TCM) memory.
2. Were there any active DTC’s in the TCM’s memory?
a. YES>>>Using the appropriate trouble shooting procedure, diagnose and repair
conditions that may have set the DTC(s).
b. NO>>>Proceed to the next step.
21-012-14 REV. A
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3. Start the vehicle and operate the engine until the transmission oil temperature is at
least 30°C (86°F). It may be necessary to apply the service brake and shift the
transmission into gear to improve warm-up time and/or drive the vehicle until the
transmission temperature reaches 30°C (86°F).
NOTE: Some vehicles may be equipped with a message center in the cluster that
provides transmission temperature values. If the vehicle is not equipped with
this message center, than the wiTECH must be used to identify transmission
temperature.
Determining Shift Quality Subjective Measurement Chart
Condition Noted
Not
Severe
Tolerable
1
2
Very
Poor
Poor
3
4
Marginal Barely
Accept
5
6
Fair
Good
Very
Good
Perfect
7
8
9
10
4. The “Eight Speed Shift Quality Worksheet” will be used for documenting the Shift
Quality Subjective rating as well as the Adaptation Memory Cell data. Refer to
DealerCONNECT>Service>Diagnostic Check Sheets (Located on the Service Tab in
the “Repair Information” box)>Transmission. Print a copy of the worksheet and attach
a copy of the worksheet on the Repair Order once completed.
5. Determine shift quality using the “Determining Shift Quality Subjective Measurement
Chart”. Shift quality will be evaluated on a scale of 1 to 10. The shifts should include
1-2, 2-3, 3-4, 4-5, 5-6, 6-7, 7-8 upshifts along with 8-7, 7-6, 6-5, 5-4, 4-3, 3-2, and 2-1
down shifts with light braking and reverse engagement.
6. The transmission adaptations will improve as the vehicle is driven.
7. Drive the vehicle in a safe area where the transmission is allowed to shift from first
gear through each gear up to eighth gear. From a stop, slowly accelerate the vehicle
using a constant throttle/pedal to approximately 72 KPH to 80 KPH (45 MPH to 50
MPH). The transmission must shift from first gear up to eighth gear.
8. Record the Shift Quality Subjective Rating for each shift.
NOTE: The Shift Quality Subjective Rating should not be established by comparing
each shift event to other shift events in a single vehicle. Example: Do not
compare the 1-2 shift to the 3-4 to establish the subjective rating. The
Subjective Quality Rating for each shift should be established by comparing
the shift quality of a specific shift to the baseline of that specific shift
established from driving multiple vehicles.
NOTE: On vehicles equipped with the paddle shifter or ERS, use of the paddle shift
system/ERS shifter should be used to help maintain specific gear positions.
9. From 72 KPH (45 MPH), lightly brake to a stop.
NOTE: The time allowance includes time to perform the Subjective Shift Quality
assessment (upshift from first gear to eight gear and down shift from eight
gear to first gear) three times if necessary.
10. On the Shift Quality Worksheet, record the Shift Quality Subjective Rating for each
shift.
-5-
21-012-14 REV. A
11. While the vehicle is static and the service brake is applied perform a shift from Neutral
to Reverse.
12. If any shift has a Subjective Shift Quality Evaluation less than five (5), perform the
Adaptation Drive Learn identified in “REPAIR PROCEDURE B”.
NOTE: Customers may need to be informed that adaptation will continue to update
as the vehicle is driven providing improved shifts as the vehicle mileage
increases.
SPECIAL TOOLS/EQUIPMENT REQUIRED:
NPN
wiTECH VCI Pod Kit
NPN
Laptop
REPAIR PROCEDURE A:
NOTE: Repair Procedure A should only be performed if a Transmission is replaced,
Transmission has been overhauled, valve body/TCU assembly (mechatronic)
is replaced, and/or the adaptation memory cells have been cleared with the
wiTECH.
1. To ensure that the process is repeatable, dealers should perform the following
recommendations:
a. Identify specific employees to perform the Adaptation Procedure. These employees
become the Qualified Adaptation Procedure Technicians.
b. Each Qualified Adaptation Procedure Technician should drive approximately five
8-speed vehicles to establish a baseline for the shift quality of each shift as received
at the dealerships.
NOTE: It may be necessary to compare shift quality only to like vehicles. E. G. Ram
1500 shift quality to other Ram 1500 vehicles.
2. The Adaptation Drive Learn procedure is very sensitive to transmission temperature,
transmission input shaft torque, and transmission turbine RPM. The Adaptation Drive
Learn procedure must be performed at the following:
a. Transmission Oil Temperature between 30°C (86°F) - 100°C (212°F).
b. UPSHIFTS - Transmission input Shaft Torque between Between 100 N·m and 150
N·m (74 ft. lbs. and 111 ft. lbs.) (will be monitored on wiTECH as Engine Crankshaft
Torque).
c. UPSHIFTS - Transmission input shaft RPM 1250 - 2000 RPM (can be monitored by
monitoring Engine RPM using the tachometer on the cluster).
3. The Adaptation Drive Learn procedure will be performed driving the vehicle while
maintaining the previous criteria. The following needs to be considered when
determining the Adaptation Drive Learn procedure drive route:
a. The Adaptation Drive Learn procedure needs to be performed on a road that can be
driven safely while accelerating repeatedly to a speed of 64 - 80 KPH (40 - 50
MPH).
b. The route road needs to be very smooth - imperfections in the road surface such as
pot holes, tar strips, etc. can cause minor deflections in torque causing a delay in
obtaining the adaptation.
21-012-14 REV. A
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c. Avoid hills although a constant slight incline will allow the transmission input shaft
torque to be obtained easier. A too severe of an incline may cause the transmission
to down shift. The adaptation must be learned in the proper gear. The procedure will
restart once the proper gear has been obtained. Also, if the route contains hills that
both incline and decline, the transmission input shaft torque load may be too light
and the adaptations will not be recorded.
d. Traffic congestion should be avoided. The procedure will require the vehicle to be
driven safely while accelerating repeatedly to a speed of 64 - 80 KPH (40 - 50
MPH).
e. Avoid Traffic Lights/Stop Signs/Yield Signs/etc. The procedure will require the
vehicle to be driven safely while accelerating repeatedly to a speed of 64 - 80 KPH
(40 - 50 MPH).
f. The Adaptation Drive Learn procedure is performed with an assistant so that
wiTECH can be properly monitored while maintaining safe driving practices.
4. With the Scan Tool, erase transmission related DTCs.
5. Accelerate the vehicle from a stop to approximately 64 - 80 KPH (40 - 50 MPH)
making sure the transmission upshifts to seventh gear. The following parameters must
be kept during acceleration in order for the adaptation to take place:
a. Turbine (Input) Speed between 1,250 - 2,000 rpm
b. Torque between 100 N·m and 150 N·m (74 ft. lbs. and 111 ft. lbs.)
6. Release the throttle (0% position) allowing the vehicle to coast until the transmission
performs a 6-5 down-shift.
NOTE: In order for the adaptation of the B Clutch, the transmission must be allowed
to perform a 6-5 downshift without braking with transmission input shaft
torque between negative (-) 60 N·m and negative (-) 40 N·m (negative (-) 44 ft.
lbs. and negative (-) 30 ft. lbs.) and input shaft RPM Between 750 and 1100
rpm.
7. Continue to coast (brake can be applied once the 6-5 downshift has occurred) until
third gear can be obtained.
8. Perform steps 4-6 until the Filling Counters for each clutch displays:
a. 8HP45/845RE - Filling Counters by 10 counts
b. 8HP70/8HP90 - Filling Counters by 6 counts
9. The tables below may be used as an alternate reference for the optimal conditions
required to learn the Fast Filling Adaptations.
Adaptation Conditions Table
Conditions Where Adaptations Occur
Condition
Transmission
Temperature
Torque N·m (ft. lbs.)
Input Speed (RPM)
Upshifts
Between 30° C and
100° C (86° F and
212° F)
Between 100 N·m
and 150 N·m (74 ft.
lbs. and 111 ft. lbs.)
Between 1250 and
2000 rpm
6-5 Downshifts for B
Clutch
Between 30° C and
100° C (86° F and
212° F)
Between negative (-)
60 N·m and negative
(-) 40 N·m (negative
(-) 44 ft. lbs. and
negative (-) 30 ft.
lbs.)
Between 750 and
1100 rpm
-7-
21-012-14 REV. A
Clutch versus Shift Table
Shifts Where Each Clutch Will Adapt
A Clutch
B Clutch
C Clutch
D Clutch
Shift
6-7
6-5
2 - 3 and 4 - 5 3 - 4
Optimal
conditions
under which
adaptation
learning
occurs
Best
Coasting with Best
performed at throttle at 0% performed at
highway
position
light to
speeds in
medium
excess of 80
throttle kph (50 mph)
normal
vehicle launch
Best
performed at
light to
medium
throttle normal
vehicle launch
E Clutch
1 - 2 and 5 - 6
Best
performed at
light to
medium
throttle normal
vehicle launch
10. Perform the “EIGHT SPEED TRANSMISSION SHIFT QUALITY DIAGNOSIS”.
REPAIR PROCEDURE B:
NOTE: Repair Procedure B should only be performed if a customer indicates that
their shift quality does not meet their expectations.
1. To ensure that the process is repeatable, dealers should perform the following
recommendations:
a. Identify specific employees to perform the Adaptation Procedure. These employees
become the Qualified Adaptation Procedure Technicians.
b. Each Qualified Adaptation Procedure Technician should drive approximately five
8-speed vehicles to establish a baseline for the shift quality of each shift as received
at the dealerships.
NOTE: It may be necessary to compare shift quality only to like vehicles. E. G. Ram
1500 shift quality to other Ram 1500 vehicles.
2. The Adaptation Drive Learn procedure is very sensitive to transmission temperature,
transmission input shaft torque, and transmission turbine RPM. The Adaptation Drive
Learn procedure must be performed at the following:
a. Transmission Oil Temperature between 50°C (122°F) - 100°C (212°F).
b. UPSHIFTS - Transmission input Shaft Torque between Between 100 N·m and 150
N·m (74 ft. lbs. and 111 ft. lbs.) (will be monitored on wiTECH as Engine Crankshaft
Torque).
c. UPSHIFTS - Transmission input shaft RPM 1250 - 2000 RPM (can be monitored by
monitoring Engine RPM using the tachometer on the cluster).
NOTE: Adaptation learning will be aborted if the transmission oil temperature is
above 100° C (212° F).
3. The Adaptation Drive Learn procedure will be performed driving the vehicle while
maintaining the previous criteria. The following needs to be considered when
determining the Adaptation Drive Learn procedure drive route:
a. The Adaptation Drive Learn procedure needs to be performed on a road that can be
driven safely while accelerating repeatedly to a speed of 64 - 80 KPH (40 - 50
MPH).
21-012-14 REV. A
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b. The route road needs to be very smooth - imperfections in the road surface such as
pot holes, tar strips, etc. can cause minor deflections in torque causing a delay in
obtaining the adaptation.
c. Avoid hills although a constant slight incline will allow the transmission input shaft
torque to be obtained easier. A too severe of an incline may cause the transmission
to down shift. The adaptation must be learned in the proper gear. The procedure will
restart once the proper gear has been obtained. Also, if the route contains hills that
both incline and decline, the transmission input shaft torque load may be too light
and the adaptations will not be recorded.
d. Traffic congestion should be avoided. The procedure will require the vehicle to be
driven safely while accelerating repeatedly to a speed of 64 - 80 KPH (40 - 50
MPH).
e. Avoid Traffic Lights/Stop Signs/Yield Signs/etc. The procedure will require the
vehicle to be driven safely while accelerating repeatedly to a speed of 64 - 80 KPH
(40 - 50 MPH).
f. The Adaptation Drive Learn procedure is performed with an assistant so that
wiTECH can be properly monitored while maintaining safe driving practices.
4. With the Scan Tool, erase transmission related DTCs.
NOTE: First and second gears do not require a standard clutch filling adaptation
procedure.
5. Use the following “8-Speed Clutch Application Chart” and the “Standard Clutch Filling
Adaptation Conditions Table” to determine which clutches require adaptation based
upon which shifts had a Subjective Shift Quality Evaluation less than five (5) as
identified in the Diagnosis Section. Example: When performing the diagnosis, it was
determined that the 2-1 downshift had a subjective rating of 4. Note that clutch “C” and
clutch “E” are applying and releasing while clutch “A” and clutch “B” remain engaged.
Since clutch “A” and clutch “B” are not applying and releasing, they will not have
anything to do with poor shift quality during the 2-1 downshift. However, during the 2-1
downshift, clutch “E” is releasing and clutch “C” is applying thus it is recommended
that both of these clutches require the adaptation to be updated. Using the “Standard
Clutch Filling Adaptation Conditions Table”, clutch “C” and clutch “E” require the
adaptation procedure which are performed in 4th and 7th gear.
8-Speed Clutch Application Chart
Gear
Clutch - A )
Clutch - B
Clutch - C
First
X
X
X
Second
X
X
Third
X
Fourth
X
Fifth
X
Sixth
Seventh
X
Eight
X
Reverse
X
Clutch - D
X
X
X
X
X
X
X
X
X
X
X
X
Clutch - E
X
X
X
X
-9-
21-012-14 REV. A
Standard Clutch Filling Adaptation Conditions Table
Steady State Gears And Conditions Where Each Clutch Will Adapt
Clutch/Gear
Optimal Vehicle
Speed
Input Speed
RPM
Torque N·m (ft.
lbs.)
Transmission
Temperature
A Clutch/6th
73-81 kph (45-50 Between 950
mph)
and 1750 rpm
Between 50 N·m Between 50° C
and 120 N·m (37 and 100° C (122°
ft. lbs. and 89 ft. F and 212° F)
lbs.)
B Clutch/7th
73-81 kph (45-50 Between 950
mph)
and 1750 rpm
Between 50 N·m Between 50° C
and 120 N·m (37 and 100° C (122°
ft. lbs. and 89 ft. F and 212° F)
lbs.)
C Clutch/4th
32-56 kph (20-35 Between 950
mph).
and 1750 rpm
Between 25 N·m Between 50° C
and 120 N·m (18 and 100° C (122°
ft. lbs. and 89 ft. F and 212° F)
lbs.)
D Clutch/3rd
32-56 kph (20-35 Between 950
mph).
and 1750 rpm
Between 25 N·m Between 50° C
and 120 N·m (18 and 100° C (122°
ft. lbs. and 89 ft. F and 212° F)
lbs.)
E Clutch/7th
73-81 kph (45-50 Between 950
mph)
and 1750 rpm
Between 25 N·m Between 50° C
and 120 N·m (18 and 100° C (122°
ft. lbs. and 89 ft. F and 212° F)
lbs.)
6. Drive the vehicle using the paddle shifters or Gear +/- buttons on steering wheel to
hold the transmission in the desired gear while maintaining the optimum input shaft
speed and torque.
7. Then, increment the Filling Counter and Fast Filling Counter for each clutch requiring
an adaptation update.
a. 8HP45/845RE - Filling Counters by 12 counts and Fast Filling Counters by 4
counts
b. 8HP70/8HP90 - Filling Counters by 6 counts and Fast Filling Counters by 2
counts
8. Perform the “EIGHT SPEED TRANSMISSION SHIFT QUALITY DIAGNOSIS” to
verify the repair.
21-012-14 REV. A
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POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
No:
Description
Skill Category
Amount
08-19-05-9A
Adaptation Drive Learn - Determining 2- Automatic
Shift Quality Subjective Measurement, Transmission
(2 -Skilled)
0.5 Hrs.
08-19-05-9B
Adaptation Drive Learn - Repair BAdaptation for Specific Shift Quality
Concerns - Drive Learn Two Clutches
(2 -Skilled)
2- Automatic
Transmission
1.9 Hrs.
08-19-05-9C
Adaptation Drive Learn - Repair A Adaptation After Transmission Repair,
Replacement, and/or valve body/TCU
assembly (mechatronic) Replacement
(2 -Skilled)
2- Automatic
Transmission
1.4 Hrs.
95-21-44-02
Adaptation Drive Learn - Determining
Shift Quality Subjective Measurement
— Porters Time Flat Fee Allowance
$25.00
95-14-01-02
Adaptation Drive Learn -Fuel
Allowance - A Copy of the Fuel Receipt
Must be Attached to the Repair Order
$32.00
08-19-05-54
Adaptation Drive Learn - Repair B2- Automatic
Adaptation for Specific Shift Quality
Transmission
Concerns - Vehicles Equipped Without
ERS or Paddle Shifter (2 -Skilled)
0.3 Hrs.
08-19-05-55
Adaptation Drive Learn - Repair B Each Additional Clutch (Maximum
Three)
0.2 Hrs.
Related
Operations No:
FAILURE CODE:
ZZ
Service Action
2- Automatic
Transmission