Acceleration Improvement Program
83mitsubishi03
SUBJECT:
CORDIA/TREDIA ACCELERATION IMPROVEMENT PROGRAM
NO. STB-83-21-001
DATE February 1983
MODEL 1983 Cordia/Tredia
w/Auto Transaxle
INTRODUCTION
To improve the marketability of 1983 Mitsubishi Cordia and Tredia models equipped with automatic transaxle, an Acceleration Improvement program has been initiated. The program is directed at improving the 0-30 mph performance of these models.
PROGRAM OVERVIEW
The program consists of three independent modifications which act in conjunction with one another to improve low speed performance.
Final Drive: This modification, designed to increase the torque at the driving wheels, consists of a change in the final drive ratio of the transaxle from 2.800:1 to 3.166:1. A/C Cut-Out Switch: This modification consists of the installation of a cut-out switch into the air conditioning electrical circuit. The switch shuts off the A/C compressor under wide open throttle operation, eliminating compressor load and providing maximum engine power to the driving wheels. Secondary Throttle Actuator Vacuum Line
Orifice: A .5 mm orifice is installed in the secondary throttle actuator vacuum line. This modification stabilizes the opening of the carburetor secondary throttle valve?.
PROGRAM RESULTS
The program has produced a substantial improvement in the low speed performance characteristics of these models. As a result, all three modifications have been incorporated on the production line. In addition, a comprehensive program has been developed to assist the Mitsubishi Motors Dealers in modifying all current existing demonstrators, dealer inventory, and vehicles received from the P.O.E.
MODEL APPLICATION
The modifications have been performed on the production line starting from the following vehicle identification numbers. All vehicles that have a VIN preceding these numbers and have not been sold as of February 7, 1983 must be modified for sale.
Federal Vehicles CORDIA Final Drive:
w/power steering JA3BF444*DZ702364
w/o power steering JA3BF444*DZ702370
Secondary Orifice:
w/ power steering JA3BF444*DZ702447
w/o power steering JA3BF444*DZ702498
A/C Cut-Out Switch JA3BF444*DZ702443
Exclude JA3BF444*DZ702360
TREDIA Final Drive:
w/ power steering JA3BF464*DZ702887
w/o power steering JA3BF464*DZ702859
Secondary Orifice:
w/power steering JA3BF464*DZ702974
w/o power steering JA3BF464*DZ703212
A/C Cut-Out Switch JA3BF464*DZ703224
Cordia Vehicles CORDIA Final Drive:
w/ power steering JA3BF444*DZ800831
w/o power steering JA3BF444*DZ800969
Secondary Orifice:
w/ power steering JA3BF444*DZ800967
w/o power steering JA3BF444*DZ800990
A/C Cut-Out Switch JA3BF444*DZ800990
TREDIA Final Drive:
w/power steering JA3BF464*DZ801022
w/o power steering JA3BF464*DZ801016
Secondary Orifice:
w/power steering JA3BF464*DZ801013
w/o power steering JA3BF464*DZ801119
A/C Cut-Off Switch JA3BF464*DZ801138
DEALER RESPONSIBILITY
Acceleration Improvement Progrom modifications should be performed in the following prior ty as soon as possible:
1. Vehicles pending sale. Again, no affected vehicle may be sold after February 7, 1983 without the modification.
2. Demonstrator vehicles.
3. All other vehicles in dealer stock.
4. Vehicles as received from the P.O.E.
MMSA SUPPORT The following are the items required to perform all of the modifications. Parts Three modification parts kits are available:
Final Drive Modification K# P/N MD714319:
QTY DESCRIPTION
2 Circlips
1 D-ring
1 O-ring
3 Seal Rings
1 Snap Ring
1 Gasket, oil drain plug
1 Gasket, oil pump
1 Gasket, case
1 Gear, diff. drive
1 Bearing, taper roller
1 Parts kit, T/F shaft
7 Selective spacers
A/C Cut-Out Switch Kit P/N MB332624:
QTY _ DESCRIPTION
1 Micro switch assembly
1 Switch bracket for cruise control equipped
vehicles
1 Switch bracket for non-cruise control equip-
ped vehicles
1 Mounting bracket
1 Clip
1 Cable band
1 Tapping screw (5 x 12)
2 Bolt and washer (6 x 16)
Secondary Orifice Kit P/N MD600027:
QTY DESCRIPTION
1 .5 mm Orifice 1
Support Parts: Each Final Drive kit contains 7 selective spacers for the adjustment of transfer shaft end play. These 7 spacers represent the most commonly used spacers. They are identified in the following chart with an (*). In addition, 22 additional size spacers are available separately and may be ordered through the regular parts channels.
Selective Spacers
THICKNESS ID MARK P/N
mm (inch)
1.84 (.0724) 84 MD706580*
1.87 (.0736) 87 MD706581
1.90 (.0748) 90 MD706582
1.93 (.0760) 93 MD706583
1.96 (.0772) 96 MD706584
1.99 (.0783) 99 MD706585
2.02 (.0795) 02 MD706586*
2.05 (.0807) 05 MD706587*
2.08 (.0819) 08 MD706588*
2.11 (.0831) 11 MD706589*
2.14 (.0843) 14 MD706590*
2.17 (.0854) 17 MD706591*
2.20 (.0866) 20 MD706592
2.23 (.0878) 23 MD706593
2.26 (.0890) 26 MD706594
2.29 (.0902) 29 MD706595
2.32 (.0913) 32 MD706596
2.35 (.0925) 35 MD706597
2.38 (.0937) 38 MD706598
2.41 (.0949) 41 MD706599
2.44 (.0961) 44 MD706600
2.47 (.0972) 47 MD706601
2.50 (.0984) 50 MD706602
2.53 (.0996) 53 MD706603
2.56 (.1008) 56 MD706604
2.59 (.1020) 59 MD706605
2.62 (.1031) 62 MD706606
2.65 (.1043) 65 MD706607
2.68 (.1055) 68 MD706608
Ordering/Shipment Schedule: During the week of February 7 and again during the week of February 14, 1983, every dealer will receive an initial supply of parts kits, based on the dealership's sales volume. Information on subsequent distribution of parts will be issued at a later date. A complete kit will consist of the following components:
Final Drive Kit MD714319
2 packages
Orifice Kit MD600027
1 package
A/C Cut-Out Switch Kit MB332624
1 package
Identification Label 1 each
Special Tools The following special tools are essential for the completion of the modifications. Since these tools are included in the original required tool package, you should already have them on hand. If, however, you need any of these tools, or if you wish to obtain additional tools to increase your productivity, you may order them direct from Owatonna Tool Company by using one of the order forms in the rear of the Special Tools and Equipment binder.
The special tool information is updated to include a special retainer MD998315 which may be used to hold the clutch pack in place if it is not desired to remove the clutch pack. This tool is available from Owatonna Tool Co. at $12.88.
Technician Training Service training will be provided in an individualized instruction format for all technicians who will be performing the modification. The training program consists of two filmstrip cartridges for the Triple Diamond Communications System titled "1983 Mitsubishi Cordia/Tredia Acceleration Improvement Program", "Cartridge 1" and "Cartridge 2". This comprehensive program contains the complete step-by-step procedures for all the modifications, and when used in conjunction with this Service Technical Bulletin, contains all of the information needed to complete the modifications properly. Each dealer will receive two sets of the cartridges on or about February 4, 1983.
Revisions
Please note these last minute revisions in the modification procedures contained in the filmstrip and apply them at the appropriate points.
1. The recommended automatic transmission fluid for use in the transaxle units is Dexron or the newly developed Ford "Type H" fluid. These fluids are compatible with the operation of the ELC torque converter and may be used for complete refill or for "topping off" the fluid level. If these fluids are not available, Dexron II may be used but for topping off ONLY.
Job Aids To save time, procure the following job aids before beginning the modification.
Band Hook: Fashion a hook from a piece of welding rod or from a coat hanger to aid in the installation of the kickdown drum. The hook should be 8"-10" long with a short hook at the end as illustrated:
Wheel Wedge: A piece of 2x4 lumber, 17" long, will be needed to hold the left axle shaft out of the way during removal and installation of the transaxle.
Procedure/Specification Sheet: After a technician has performed the modification several times, he most likely will no longer need the filmstrip module to modity a vehicle, however, he will still want to be sure that all of the steps are being completed properly. Therefore, a procedure sheet is attached to help guide him through the procedure and to provide the necessary specifications.
WARRANTY CLAIM SUBMITTAL
A Warranty Claim (MWC) should be submitted using the standard Warranty Claim form (MSSP- 003D-00). The following instructions must be followed to ensure prompt processing and reimbursement.
^ Submit one claim form for each vehicle.
^ Change the top part of each claim form. "White-out" the pre-printed "W" and insert
the letter "X" in the same space (see claim example below):
^ Use the following operation code and time allowances.
OPERATION
OPERATION CODE TIME
Final Drive Gear 21310990 4.7
Secondary Orifice 14304390 0.1
A/C Cut-Out Switch 14801090 0.3
NOTE
If a Final Drive Modification is performed on a vehicle, the operation code and the applicable parts kit for that modification MUST be placed on line A of the claim.
^ Use Failure Code "99" for this product modification.
^ Enter the PRODUCT MODIFICATION" in the Sublet Information box on the right side of claim.
GETTING STARTED
1. Identify vehicles on hand which must be modified.
2. Prioritize vehicles and schedule them for modification.
3. Identify/verify what modifications must be
made on each vehicle. Be sure to check the following:
Final Drive:
^ Identify if the vehicle VIN precedes the factory modification VIN. If it does, perform the Final Drive Modification.
SPECIAL NOTE
A silver adhesive tag with 3.166 printed on it is attached to the top of the transaxle upon modification completion. In the event of dealer trades, the presence of this tag should be verified in addition to the VIN.
A/C Cut-Out Switch
^ First, verify that the vehicle has air conditioning installed.
^ Next, identify it the vehicle VIN precedes the factory modification VIN.
- If it precedes the factory identification VIN, perform the modification.
- If it does not precede the factory modification VIN, open the hood and check the radiator support for the installation on a Port "A/C Installed" label.
- If there is a label, install an A/C Cut-Out Switch.
- If there is no label, an A/C Cut-Out Switch is not required since it was installed at the factory.
Orifice
^ Identify if the vehicle VIN precedes the factory modification VIN.
Triple Diamond Communications System:
When the technician performs the modification using the filmstrip, the work area should be arranged similar to the illustration below.
Technician Preview: Organize the technicians who will be doing the modifications in a brief meeting to preview the training filmstrip cartridges and to review the content of this bulletin.
REGISTRATION Several Service Training Registration/Evaluation forms are included with this bulletin. The service manager should fill out the top portion of the form for each technician prior to the technician starting his first modification. The technician staff should then fill out the bottom portion of the form when the modification is complete. The forms should then be mailed to M MSA Service Training for dealership training credit.
ADDITIONAL ASSISTANCE If additional assistance is required, contact your District Service Manager or the Regional Office.
The Quick Specs/Modification Card is updated as follows:
The back side of the card, first column, step number 15 and 16 have been updated as follows:
15. To eliminate the possibility of transfer gear-to-converter housing interference, check the transfer shaft end play as follows: Install a 1.84 mm spacer (MD706580) behind the bearing race in the converter housing before checking end play.
16. Then check end play in the normal way, but calculate the required spacer thickness as follows:
The 1.84 mm spacer must be removed and the new calculated spacer installed.
Remove the following label and place it on the back side of the procedure card below step 20. and also strike out step 15 and 16 on the card.