1997 Dodge Caravan Brake Booster

Removal (3.3L V6 & 3.8L V6)
Release vacuum from power brake booster by pumping brake pedal several times with engine off until brake pedal becomes firm. Disconnect battery cables from battery. Remove battery guard and battery. Remove air inlet resonator with hoses attached from throttle body and air cleaner housing.
On models with cruise control, disconnect electrical connector at cruise control servo. Disconnect vacuum hoses from cruise control servo and vacuum reservoir on battery tray. Remove cruise control servo mounting bracket-to-battery tray bolt. Slide mounting bracket forward and unhook from battery tray. Remove mounting bracket and cruise control servo.
On all models, remove bolts/nuts and battery tray. Disconnect electrical connectors at EGR transducer and throttle body. Remove bolts and throttle body with throttle cable bracket from intake manifold.
Disconnect electrical connector at brake fluid level sensor located on master cylinder fluid reservoir. Remove wiring harness bracket from studs on driver's side strut tower.
Clean master cylinder-to-power brake booster area to prevent dirt particles from falling into power brake booster. Remove clip attaching drain hose on brakeline at master cylinder. Remove drain hose from windshield wiper module.
Remove master cylinder-to-power brake booster nuts and slide master cylinder from power brake booster with brakelines attached and secure aside. Remove EGR valve with EGR transducer as an assembly from intake manifold. Disconnect vacuum hose from check valve on power brake booster. DO NOT remove check valve from power brake booster.
Remove power brake booster rod-to-brake pedal pin retaining clip by positioning a small screwdriver between center tang on retaining clip. Rotate screwdriver enough to allow retaining clip center tang to pass over end of brake pedal pin. Pull retaining clip from brake pedal pin. Discard retaining clip. Disconnect brake booster rod from brake pedal pin.
On models with ABS, remove mounting nuts securing Controller Anti-Lock Brake (CAB) on power brake booster mounting studs, near brake pedal. Lay CAB aside with electrical connector still installed on CAB.
On all models, remove power brake booster-to-firewall nuts located below the dash panel, near steering column and brake pedal bracket. From engine compartment, slide power brake booster forward until it clears the studs and then tilt upward and toward center of vehicle and remove.
CAUTION:DO NOT pry master cylinder-to-power brake booster vacuum seal from master cylinder by inserting sharp tool between master cylinder and vacuum seal.

Remove master cylinder-to-power brake booster vacuum seal from groove on mounting flange of master cylinder by pulling vacuum seal from master cylinder. DO NOT pry vacuum seal from master cylinder.
CAUTION:DO NOT attempt to disassemble power brake booster. Power brake booster is serviced ONLY as a complete unit. Master cylinder-to-power brake booster vacuum seal MUST always be replaced. DO NOT reuse vacuum seal. Ensure vacuum seal is squarely installed in groove on mounting flange of master cylinder.

Installation
To install, reverse removal procedure. Ensure heater hoses are not caught between dash panel and power brake booster when installing power brake booster.
Use NEW retaining clip and NEW master cylinder-to-power brake booster vacuum seal. DO NOT reuse retaining clip or vacuum seal. Coat bearing surface of brake pedal pin with grease before installing brake booster rod on brake pedal pin.
Ensure NEW master cylinder-to-power brake booster vacuum seal is squarely installed in groove on mounting flange of master cylinder before installing master cylinder. Tighten all fasteners to specification.

The brake booster is bolted on the firewall. You will need to remove the master cylender, the attaching clip on the brake pedal in the vehicle, and then there are 4 bolts that hold it. You need to get under the dash to access the nuts that hold it on. It's tight but accessable.

Let me know if you have questions.

Joe