KYB KG4745A Shock Absorber - Rear, Rear Left or Rear Right

KYB Gas-a-just Rear Shock Absorber

The KYB Gas-a-just KG4745A is a monotube rear shock absorber built for trucks and utility vehicles that need firmer control, quicker response, and consistent damping. It is a direct-fit suspension shock absorber for select Suzuki, Geo, Chevrolet, GMC, and Pontiac applications, including rear fitments for the Suzuki Grand Vitara, Tracker, Vitara, Sidekick, X-90, and Pontiac Sunrunner.

Gas-a-just Performance Line

KYB Gas-a-just shocks use a monotube design with separate gas and oil chambers for stable operation and immediate response. The Gas-a-just line is aimed at vehicles that work, tow, or run larger tires and wheels, with valving and components tuned for truck use and added damping over OE-style shock designs.

Key Features

• Adds up to 25% more damping performance over original equipment shocks
• Monotube construction separates gas and oil for fade-resistant operation
• High-pressure nitrogen gas helps the shock respond quickly to steering and road inputs
• Triple chrome plated piston rod helps reduce seal wear and fluid leakage
• Designed specifically for trucks and heavier-duty rear suspension demands
• Supports consistent suspension control for vehicles with larger, heavier tires and wheels
• Dust cover included

Detailed Description

KYB KG4745A is engineered for rear suspension applications where control matters more than soft ride tuning. The monotube design uses an air-free hydraulic working chamber and a separate high-pressure gas chamber with a floating piston, which helps maintain damping consistency under load and during repeated suspension movement. For drivers of the Suzuki Grand Vitara, Geo Tracker, and related compact SUV platforms, this shock is built to restore rear-end stability, improve body control, and reduce the loss of damping that can occur with worn twin-tube units. The KG4745A part number is a practical OE-style replacement choice for rear suspension service on these vehicles.

This part cross-references Monroe Shocks & Struts (e.g., 37070) for the same application.

What It Helps Fix

• Excessive rear bounce after bumps or dips
• Reduced steering response caused by worn rear shocks
• Rear-end instability when carrying cargo or towing
• Suspension fade from heat and repeated compression cycles
• Fluid leakage related to worn shock seals

Installation Notes and Fitment

Fits 1999-2005 Suzuki Grand Vitara, rear. Fits 1998-2004 Chevrolet Tracker, rear. Fits 1989-1991 Chevrolet Tracker, rear. Fits 1999-2004 Suzuki Vitara, rear. Fits 1989-1998 Suzuki Sidekick, rear. Fits 1996-1998 Suzuki X-90, rear. Fits 1996-1997 Geo Tracker, rear left. Fits 1996-1997 Geo Tracker, rear right. Fits 1989-1997 Geo Tracker, rear. Fits 1994-1997 Pontiac Sunrunner, rear. Fits 1989-1991 GMC Tracker, rear.

Verify compressed length, extended length, and mount style before installation: compressed length 11.81 in, extended length 18.19 in, stroke length 6.38 in, lower mount type E2(12X38), upper mount type S1. This shock includes a dust cover and uses an R-stop. Professional installation and a post-installation alignment check are recommended when replacing rear suspension components.

Quality Assurance

KYB is known for suspension components engineered to meet the demands of OE replacement and performance-oriented service. The Gas-a-just design uses a high-pressure monotube layout to help maintain consistent damping and support electronic safety systems that rely on proper suspension, brake, and tire behavior.