Chrysler NS, GS Service Manual

Chrysler NS, GS Service Manual. That’s what you need when a customer rolls in with a mushy pedal and you’ve got two hours to diag it before the next job. I’ve been turning wrenches for 28 years, and I’ve seen more brake jobs go sideways from using a third-party manual than from bad parts. This 110-page factory PDF is the one Chrysler engineers wrote for their own techs. It covers the base brake system, proportioning valves, master cylinders, wheel cylinders, and every vacuum booster variation for the 2.4, 3.0, and 3.3/3.8 liter engines. You want the bleeding sequence? It’s in there. You need the rotor refinishing limits? Page numbers are printed, but you’ll find them under ROTOR MACHINING (FRONT/REAR). No guessing. No aftermarket shortcuts.

Brake System Diagnosis Charts – Real-World Use

The BRAKE SYSTEM DIAGNOSIS CHARTS section alone is worth the download. It breaks down noise conditions, red brake warning lamp function, power brake system diagnostics, and vehicle road test procedures. If you’ve ever chased a pulsation that turned out to be a height-sensing proportioning valve sticking, you know how much time a proper flowchart saves. The manual includes the FIXED PROPORTIONING VALVE TEST PROCEDURE and the HEIGHT SENSING PROPORTIONING VALVE test – both with factory pass/fail criteria. I’ve used this exact chart on a 1998 GS van that had a sporadic ABS light. Found the valve wasn’t within spec in under 20 minutes.

Master Cylinder & Wheel Cylinder – Disassembly and Assembly

Under DISASSEMBLY AND ASSEMBLY, the manual walks through the MASTER CYLINDER FLUID RESERVOIR, the brake fluid level switch, the fill tube, and the front disc brake caliper guide pin bushing service. The REAR DRUM BRAKE WHEEL CYLINDER disassembly procedure is covered with the exact spring orientation and bore inspection limits. No aftermarket manual I’ve seen gives you the CALIPER ASSEMBLY torque sequence for the NS/GS platform. This one does. Pay attention to the SERVICE PRECAUTIONS under FRONT DISC BRAKE CALIPER – they call out the specific thread locker type for the caliper guide pins.

Bleeding Procedures – Why Factory Specs Matter

Three bleeding procedures are documented: PRESSURE BLEEDING PROCEDURE, BLEEDING WITHOUT A PRESSURE BLEEDER, and MASTER CYLINDER BLEEDING PROCEDURE. The pressure bleeder section gives the exact psi range for the NS/GS brake system – something a generic manual won’t tell you. Overpressurize a master cylinder reservoir and you can blow the seal. That’s a come-back that costs you two hours and a set of brake pads. Follow the factory method. The STOP LAMP SWITCH TEST PROCEDURE also includes a fluid contamination check that most DIYers skip. Don’t be that guy.

Removal & Installation – Every Component, Every Engine

This manual dedicates pages to VACUUM BOOSTER removal and installation for three different engines: 2.4L, 3.0L, and 3.3/3.8L. Each has its own bolt pattern and vacuum line routing. The REAR BRAKE SUPPORT PLATE and HUB/BEARING sections separate front-wheel drive from all-wheel drive configurations. If you’re swapping a rear wheel cylinder on a GS with drum brakes, the REAR DRUM BRAKE SHOES installation procedure shows the manual lockout of the auto adjuster. Miss that step and the customer gets a dragging brake the first time they set the parking brake. I’ve seen it happen. The PARKING BRAKE AUTO ADJUSTER MECHANISM section includes the engagement procedure – use it.

Why OEM Documentation Beats Reprints

This is a direct scan of the Chrysler factory manual, not a rewrite from a third party. The GENERAL VEHICLE SERVICE CAUTIONS page includes original warnings about brake dust, corrosion, and torque-to-yield fasteners that reprint houses often omit. The tube flare specifications – DOUBLE INVERTED TUBING FLARES and ISO TUBING FLARES – are given with thread sizes (3/8-24, M10x1, M12x1) that match the actual hardware on the NS/GS. No generic “use a 10mm” nonsense. I’ve watched a tech round off a brake line nut because a cheap manual said M10 when the car used 3/8-24. This manual prevents that.

Does It Cover the Proportioning Valve?

Yes – both the FIXED PROPORTIONING VALVE (non-ABS) and the HEIGHT SENSING PROPORTIONING VALVE (rear disc brakes) are covered in DIAGNOSIS AND TESTING and REMOVAL AND INSTALLATION. The valve is a Valve that often gets blamed for a soft pedal when the real issue is air in the rear circuit. The manual’s test procedure will tell you exactly when to replace vs. bleed. Also included: PROPORTIONING VALVE (W/ABS BRAKES) and PROPORTIONING VALVE (W/O ABS BRAKES) separate removal/install steps.

FAQ

Does this manual include torque specs for the brake caliper bracket bolts?

Yes. Factory torque values are listed in the REMOVAL AND INSTALLATION sections for each caliper and bracket. You won’t find generic ranges – they’re model-specific for the NS and GS platforms.

Can I use this manual for the antilock brake system (Teves Mark 20)?

The manual covers the base brake system in full. The antilock brake system is referenced in the table of contents (page 80 of the original book), but the PDF focuses on the base system components – master cylinder, wheel cylinders, proportioning valves, brake tubes and hoses. For the ABS modulator and electronic diagnostics, you’ll want the Chrysler NS GS Wiring Diagram to pair with this manual. The wiring diagram gives you the pinouts for the ABS controller and the wheel speed sensors. For drivetrain-related brake issues (like a seized caliper from a bad half-shaft), reference the Chrysler NS/GS Transaxle and Power Transfer Unit Service Manual – Section: Power. And if you’re doing a brake job that involves removing wheels and tires, the Chrysler NS GS Tires & Wheels Service Manual has the correct lug nut torque and wheel installation sequence. Finally, if you need to understand how the brake system integrates with the Manual Transmission or Manual Transmission clutch master cylinder, consult the external resources – but trust the factory brake manual for all hydraulic specs.

You don’t get a do-over on a brake job. The Chrysler NS, GS Service Manual gives you the factory sequence, the correct flare nut torque, and the bleeding order that keeps the proportioning valve from sticking. Download the Factory Manual and keep it on your tablet next to the workbench. Your customer’s safety – and your flat rate – depend on accurate data.