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TSB's for 1990 trucks

Category 2 - Front Suspension

02-06-90A	2wd vehicles only	Front spring spacer for two wheel drive trucks. The condition is a vehicle leaning or low on the left front corner. The repair involves the installation of a spacer (4322629) on the left coil spring to raise the left front corner approximately one inch.
02-09-90	4wd vehicles only	Service manual revision for camber specification.

Category 3 - Rear Axle

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.
05-04-92 A	Sales code BKH, BKJ	Premature brake wear on trucks with 12” brake drums. The bulletin involves replacement of the rear brake shoes (lining) with revised shoes.
05-01-91	All	Rear wheel anti-lock speed sensor connector repair procedure. If a red/amber ANTILOCK warning light illuminates and a code 9 diagnostic code is found, a possible cause is the connector for the RWAL speed sensor. The bulletin describes the repair procedure and parts needed to correct the problem.
05-05-91	All	Front disc brake noise from Bendix disc brakes. The bulletin applies to trucks with Bendix disc brakes (3.38” caliper pistons). Noise can occur and the repair involves grinding a chamfer on both ends of the outboard brake pad.
05-07-90	All	Rear wheel anti-lock faults caused by water contamination. A possible cause for illumination of the BRAKE and ANTILOCK warning lamps could be water contamination of the 4-way connector at the hydraulic valve and/or at the 50-way connector. The bulletin describes the repair and parts necessary to add a service jumper harness to the existing harness.
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

All with manual transmission

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

07-01-91	All	Overheating or no heat condition. An interference between the thermostat and cylinder head coolant passage on engines built before engine serial number 44465181 may result in a stuck t-stat in the open or closed position. A revised t-stat and coolant passage diameter check a part of the repair procedure.
07-04-91	All	Lower radiator hose leakage. Some leakage from the lower radiator hose at the waterpump connection may occur due to a step cast in the water pump nipple. The repair involves installing a second hose clamp.
07-03-90	All	Lower radiator hose leakage. Some leakage from the lower radiator hose at the waterpump connection may occur due to a step cast in the water pump nipple. The repair involves installing a second hose clamp.
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.
08-05-91	All	Trailer tow wiring installation. The information only bulletin gives guidelines for proper wiring of trailer tow wiring packages.
08-10-91	All	Speedometer reading fluctuates and/or the speed control disengages. The condition may be caused by spread female connectors at the 2-way distance sensor connector. Inspect and replace as necessary.
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

11-02-92

All

Rear tailpipe support bracket cracking.
The condition is a rattle noise caused by a crack or break in the rear tailpipe support bracket area. A revised tailpipe support bracket (5 2018458) is the part used for repair.

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.
14-02-90	All	Accelerator pedal effort too high. The bulletin describes the installation of revised parts to lessen the pedal effort. If the truck has a Mopar aftermarket speed control kit, the kit already has the revised parts.

Category 16 - Propeller Shafts & U-joints

Category 18 - Vehicle Performance

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.
19-02-91	4wd	Steering wheel off-center. Due to a shift in the steering gear bracket in high load conditions, the steering wheel may be off center during straight driving. The repair involves installing a shoulder bolt that acts as a dowel pin locking the steering gear bracket to the frame.

Category 21 - Transmission

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.
21-39-93	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.
21-11-91	A 518 auto trans	3-4 up-shift noise with A 518 transmission. A noise or rattle during 3-4 up-shift or down-shift may be the result of an overdrive clutch pack vibration. Diagnose the vehicle to confirm condition and repair as necessary.
21-05-90	Manual trans	Replacement of transmission shift lever and stubshifter. The shift lever and stub shifter are available as separate replacement parts. If replacement is required, use the component parts - do not replace the transmission assembly.
21-14-90	A 518 auto trans	Low/reverse band wear. Premature wear of the low/reverse band may be the result of one of the overdrive transmission mounting bolts making light contact with the band strut resulting in incomplete release of the band. A washer is installed to prevent contact.
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

22-02-92

All

Wheel vibration on 350 Series trucks with flange type lug nuts.
Wheel/tire vibration may be caused by the wheels being off center on the wheel studs. The repair involves a wheel centering procedure using two 90° cone nuts.

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.
23-24-89	All	‘90 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.
24-009-02	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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