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TSB's for 1993 trucks

Category 2 - Front Suspension

Category 3 - Rear Axle

03-02-93

All

Launch shudder/vibration.
For 1992-1993 131” or 149” wheelbase trucks. Describes repair procedure to adjust the pinion angle of the rear-end to eliminate vibration or shudder in the 1-2 shift made at medium to heavy throttle. This TSB does not address “wheel hop” that occurs with manual transmission trucks at start off. Wheel hop is a function of driveline spring wrap up because of high torque being exerted on the pinion shaft.

Category 5 - Brakes

05-21-94	All	Premature brake wear on trucks with 12” brake drums. The bulletin involves replacement of the rear brake shoes (linings) with revised shoes.
05-09-96	All	Brake noise. The information only bulletin describes the normal noises that may occur with a properly operating system, ABS self check, trace squeak, grinding, groaning etc., noises are discussed.

Category 6 - Clutch

06-01-94

Manual trans

Transmission noise below 1400 rpm.
The bulletin describes a powertrain induced cyclic noise condition that appears to be transmission/ driveline related. Especially noticeable in 4th and 5th gears, the noise occurs below 1400 rpm during coast or light throttle. The noise is not damaging to the powertrain and is due to the dampening characteristics of the clutch springs. The revision, if needed, involves replacement of the clutch disc.

Category 7 - Cooling

07-03-90	All	Recycled engine coolant. The use of “reconstituted” antifreeze/coolants is not authorized in the performance of any repair covered under the provisions of warranty.
07-03-97	All	Engine coolant usage. This information only bulletin discusses the use of propylene glycol instead of ethylene glycol coolants.

Category 8 - Electrical

08-22-95	All	Installation of radio equipment. The bulletin supersedes 08-31-94, 7/15/94 and discusses the proper installation of communication equipment in Chrysler vehicles.
08-16-95 A	All	Speed control - over/undershoot during set of speed selection. The bulletin discusses the “adaptive strategy” that compensates for vehicle-to-vehicle variations in speed control cable lengths. Pressing the “set” button without pressure on the accelerator pedal can cause speed fluctuations. Proper review of the condition with vehicle operator is recommended.
08-33-94	All	Fuel gauge inaccuracy. If the fuel gauge reads inaccurately (too much reserve when the tank gauge reads empty), a revised fuel sending unit may be necessary.
08-05-93	All	White smoke at start-up. Service changes to the powertrain control module (SEBC) may cause white smoke at start-up. The SEBC is programmed to eliminate operation of the air intake heater for the first 25 vehicle starts. After service or in predelivery situations, there may be vehicles that have not accumulated 25 starts. The white smoke condition should be resolved after 25 starts are accumulated.
08-07-93 A	4wd	Speed control surge. The bulletin describes the correct speed control servo and cable match for the powertrain control module. Verify compatability of components. Replace speedometer drive gear, if necessary.
08-58-93	All	Fuel gauge innaccuracy. Too much reserve fuel in the tank when the gauge indicates empty may be the fault of an incorrect sending unit. The repair involves a wiring harness and sending unit change.
08-05-91	All	Trailer tow wiring installation. The information only bulletin gives guidelines for proper wiring of trailer tow wiring packages.
08-16-98	All	Installation of radio transmitting equipment. This bulletin supersedes technical service bulletin 08-22-95, dated May 12, 1995. This information-only TSB is provided to assist in properly installing communication equipment in Chrysler vehicle. This information should be given to any owner inquiring about installing radio transmitting equipment.
08-36-98	All	Use of two digit calendar year codes in automotive computers. There has been a great deal of recent media attention regarding the turn of the century (year 2000, Y2K, etc.) and the effect it will have on computers that have used two-digit calendar year coding in their programming. Questions are arising regarding computers used in automotive applications and the effect year 2000 will have on them. Two digit calendar-year codes have not been used in any Chrysler automotive onboard applications and no problems related to use of two digit coding for calendar years are anticipated.

Category 9 - Engine

09-003-01

All

Engine oil additives/supplements.
(EOS) should not be used to enhance engine oil performance. Engine oil additives/supplements should not be used to extend engine oil change intervals. No additive is known to be safe for engine durability and can degrade emission components. Additives can contain undesirable materials that harm the long term durability of engines. Generally it is not desirable to mix additive packages from different suppliers in the crankcase; there have been reports of low temperature of low temperature engine failures caused by additive package incompatibility with such mixtures.

09-004-01

All

Engine lubricant.
This bulletin involves 1989-2001 Ram trucks equipped with the 5.9L Cummins diesel engines. This bulletin discusses the recommended oil filters for use with Cummins 5.9L diesel engine.

	Part No	Manufacturer
	05016547AC	Mopar
	LF3894	Fleetguard Stratapore
	LF3552	Fleetguard Microglass
	LF3959	Fleetguard Cellulose
	3937695	Cummins Cellulose
	FL896	MotorCraft Cellulose
	L45335	Purolator Cellulose
	PF1070	AC Delco Cellulose

The information only bulletin was issued to alert the field to problems caused by aftermarket oil filter. For example, neoprene compounds used internally in the manufacture of oil filters not recommended by DaimlerChrysler may seperate from the filter, lodge in the piston cooling nozzle, and cause the engine to fail. THIS IS NOT AN ENGINE DEFECT.

Category 11 - Exhaust

Category 14 - Fuel

14-05-94	All	Use of low sulfur fuel. The bulletin discusses the new for 1994 low sulfur fuel. Fuel lubricity concerns are addressed as the use of diesel fuel additives to increase the lubricity of low sulfur fuel are not required.
14-15-93	All	Fuel leakage from the roll-over valve vent. The bulletin warns that repeated attempts to force fuel into the tank after the automatic shut off has engaged may lead to a condition where the fuel level in the tank is above the designed operating level. Fuel may leak out of the roll over valve in this situation. The repair involves raising the roll over vent location by installing fuel hose to the vent nipple and routing to a high location along the filler tube.

Category 16 - Propeller Shafts & U-joints

Category 18 - Vehicle Performance

18-05-93	All	Poor performance/lack of power. The bulletin discusses the troubleshooting procedures for a poor performance complaint. After verification of engine system performance, the bulletin outlines the criteria for a torque converter stall test for automatic equipped trucks and a 20-50 mph test for manual transmission trucks. An adjustment procedure for the LDA (a timing advance that is controlled by boost pressure) is described. The bulletin is known as the “starwheel” or “balloon test” by service technicians.
18-06-92 A	Auto trans	Erratic 3-4 or 4-3 shifts. The bulletin discusses erratic shifting (hunting) between third and fourth gear. The shift schedule is based on several inputs to the powertrain control module (SEBC). Diagnosis of the components is described. If a throttle position sensor is required the replacement part number is 4746966.

Category 19 - Steering

19-03-93

All

Steering Column coupler.
A repair package with a revised boot has been developed to service the steering coupler. The part number is 4740761. This is an information only bulletin.

Category 21 - Transmission

21-17-94	Auto trans	Transmission diagnostic reference supplement. To assist in the repair of automatic transmission, the information only bulletin, lists symptom/ cause/correction information.
21-18-94	Auto trans	Transmission 4-3 downshift clunk. A driveline clunk or harshness occurs during 4-3 coast downshift repair as described in bulletin.
21-23-93	Auto trans	Lack of 3/4 up-shift and deep throttle 2/4 up-shift. A complaint of lack of 3/4 up-shift at 50 to 60 mph on the ‘92 MY trucks or complaint of deep throttle 2/4 up-shift on late built ‘92 and ‘93 models could be related to the overdrive shift calibration. Using the DRB scan tool verify the engine and transmission systems are functioning properly. The powertrain control module (SEBC) may require replacement to updated part number 4746568.
21-39-93	Auto trans	Four speed automatic transmission 4-3 downshift clunk. The bulletin describes a clunk or harshness during 4-3 coast downshift at approximately 18-20 mph. Verify all engine and transmission systems are functioning properly. Repair as required.
21-18-92	Auto trans	Delayed up-shifts and harsh engagement into drive or reverse. The bulletin describes a repair involving adjustment of the throttle valve cable and replacement of the return spring.
21-010-06	Auto	Automatic transmission fl uid usage ATF+4 (Type MS9602). This bulletin supersedes technical service bulletin 21-004-04, dated March 16, 2004. ATF+4, type 9602, is being used as factory fi ll for Chrysler Group automatic transmissions. ATF+4 is recommended for all vehicles equipped with Chrysler Group automatic transmissions except for those noted: AW-4 transmissions, Sprinter transmissions, Crossfi re transmissions, MK/PM vehicles equipped with Continuously Variable Transmission (CVT). ATF+4 is backward compatible with ATF+3, ATF+2, and ATF+. Additionally, ATF+4 can be used to top off vehicles that used ATF+3, ATF+2, or ATF+. Benefi ts: Better anti-wear properties Improved rust/corrosion prevention Control of oxidation. Elimination of deposits Control of friction Retaining anti-foaming properties Superior properties for low temperature operation Mopar ATF+4 has exceptional durability. However, the red dye used in ATF+4 is not permanent; as the fl uid ages it may become darker or appear brown in color. ATF+4 also has a unique odor that may change with age. With ATF+4 fl uid, color and odor are no longer indicators of fl uid condition and do not necessarily support a fl uid change.
21-003-07	All	Automatic transmission diagnostic tear down procedure. This bulletin provides a procedure to determine repair versus replacement of an automatic transmission assembly. Follow the proper repair procedure based on the transmission type. This procedure is to be used after the transmission has been removed from the vehicle. This bulletin supersedes technical service bulletin 21-008-06, dated 04/08/06.
21-014-07	All	Automatic transmission fl uid usage ATF+4 (Type MS9602). This bulletin supersedes technical service bulletin 21-010-06, dated 4/16/06. ATF+4, type 9602, is being used as factory fi ll for Chrysler Group automatic transmissions. ATF+4 is recommended for all vehicles equipped with Chrysler Group automatic transmissions except for those noted: Sprinter transmissions, Crossfi re transmissions, MK/PM vehicles equipped with Continuously Variable Transmission (CVT) all vehicles equipped with a A568RC transmission (sales code DG3), all vehicles with a Gentrag MP56 (sales code DG5), and Grand Cherokee�s with the diesel engine option. ATF+4 is backward compatible with ATF+3, ATF+2, and ATF+. Additionally, ATF+4 can be used to top off vehicles that used ATF+3, ATF+2, or ATF+. Benefits: Better anti-wear properties Improved rust/corrosion prevention Controls oxidation Eliminates deposits Controls friction Retains anti-foaming properties Superior properties for low temperature operation. Mopar ATF+4 has exceptional durability. However, the red dye used in ATF+4 is not permanent; as the fl uid ages it may become darker or appear brown in color. ATF+4 also has a unique odor that may change with age. With ATF+4 fl uid, color and odor are no longer indicators of fl uid condition and do not necessarily support a fl uid change.

Category 22 - Wheels & Tires

22-05-93

All

Tire and wheel runout.
A quick reference chart is provided for dealer diagnosing.

Category 23 - Body

23-63-94	All	Cowl cracks. The condition is cracking or popping sounds from the cowl area at the lower corners of the windshield. Inspect the area underneath the fender at the cowl welds. The fenders must be removed to see the cracks. The repair involves installing cowl reinforcement brackets to the cowl.
23-21-92	All	‘93 standard paint colors.
23-03-97	All	Difficult to clean light colored “chalky” residue from black plastic body components. The discussion covers difficult to clean light colored “chalky” residue from exterior plastic body components that are molded in black, especially those that are textured, such as door handles, mirrors, roof rack attachments, etc. Frequently, this “chalky” residue is actually an accumulation of car wax, road grime, etc. trapped in the plastic grain. The correction is to clean the component with a soft bristle brush and mild detergent (liquid dish soap) until the residue is gone.
23-014-06	All	Windshield wiper blade maintenance. Windshield wiper blades/elements are frequently replaced unnecessarily. If the wipe pattern appears to be streaky or if there is chatter and no damage to the wiper blades/elements is obvious, the following steps should be performed: Use a soft cloth or sponge and squeegee and a solution of 50/50 alcohol and water, to wash the windshield. Raise the wiper blades off the glass and clean the wiper blade elements with a solution of 50/50 alcohol and water and a soft cloth, paper towel or sponge. Return the wiper blades to their normal operating position. If the wipe pattern is still objectionable, repeat several times. If the wipe pattern is still objectionable, replace the wiper blades/elements.

Category 24 - Air Conditioning

24-01-95 A	All	R-12 to R-134a refigerant adaptation procedure. The bulletin describes the conversion from R-12 to R-134a. The procedure should only be performed on vehicles when R-12 is no longer available.
24-17-94	All	A/C evaporation freeze-up or lack of cooling on cycling clutch of air conditioning system. Loss of A/C airflow and/or cooling while the blower fan continues to operate may occur. This bulletin discusses the role of the powertrain control module in the A/C system. The electrical signal from the A/C cycling clutch switch passes through the Powertrain Control Module (PCM) to engage and disengage the A/C clutch relay. If the PCM is not properly disengaging the A/C clutch via the relay, the compressor will stay on continuously and result in evaporator freeze-up. Also, the PCM may not energize the A/C clutch relay at all. THis condition results in the lack of cooling from the A/C system. The PCM should be checked per the procedure in the appropriate Powertrain Diagnostic Procedure Manual. Diagnostic Trouble Code 33 (A/C clutch relay circuit) will be present when either of these conditions are caused by the PCM. It is important to perform the complete test sequence because there are other A.C clutch relay circuit components that could also cause or contribute to the condition.
24-27-93	All	Air conditioner compressor noise. A growling noise may be heard with the compressor running. Diagnose the condition as outlined and perform the repair procedure if necessary. The repair involves installing a revised compressor valve plate assembly.
24-009-02	All Chrysler group products using R-134A refrigerent	A/C system leak detection. Vehicles from the factory no longer have leak detection dye in the A/C system. To determine the source of a R-134a leak, a leak tracer dye has to be injected into the A/C system.
24-003-03	All Chrysler group products	A/C system additives. The use of A/C system sealers may result in damage to A/C refrigerant recovery/evacuation/recharging equipment and/or A/C system components. Many federal, state/provincial and local regulations prohibit the recharge of A/C systems with known leaks. DaimlerChrysler recommends the detection of A/C system leaks through the use of approved leak detectors available through Pentastar Service Equipment (PSE) and fluorescent leak detection dyes available through Mopar Parts. Vehicles found with A/C system sealers should be treated as contaminated and replacement of the entire A/C refrigerant system is recommended.
24-003-03	All	A/C system additives. The use of A/C system sealers may result in damage to A/C refrigerant recovery/evacuation/recharging equipment and/or A/C system components. Many federal, state/provincial and local regulations prohibit the recharge of A/C systems with known leaks. DaimlerChrysler recommends the detection of A/C system leaks through the use of approved leak detectors available through Pentastar Service Equipment (PSE) and fluorescent leak detection dyes available through Mopar Parts. Vehicles found with A/C system sealers should be treated as contaminated, and replacement of the entire A/C refrigerant system is recommended.

Category 25 - Emissions

Category 26 - Miscellaneous

26-04-94

All

Diagnostic procedure manuals.
The bulletin gives a current list of available diagnostic procedure manuals. These manuals provide system information, step-by-step trouble shooting procedures, diagnostic and driveability tests, along with diagrams, illustrations and helpful charts to find and fix problems on Chrysler Corporation vehicles. These manuals can be ordered by calling 1-800-626-1523.

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