UMI Performance 65-87 GM Polyurethane Rear End Housing Replacement Bushings - 3000-B - UMI3000-B

The UMI Performance 65-87 GM Polyurethane Rear End Housing Replacement Bushings (Part # 3000-B) are a direct-fit, high durometer polyurethane upgrade engineered specifically for 1965–1987 GM A-Body and G-Body vehicles. If your classic Chevelle, Malibu, Monte Carlo, El Camino, or Buick/Oldsmobile/Pontiac G-Body is showing signs of worn, cracked, or rotted rear differential bushings, this kit from UMI Performance is the definitive fix — and a genuine performance upgrade over the factory rubber setup.

Key Features & Benefits

• High Durometer Polyurethane Construction: UMI's polyurethane compound is significantly firmer than the OEM rubber, resisting the cracking, dry rot, and hardening that plagues aging factory bushings — restoring precise rear suspension geometry and feel.
• Replaces the Upper Control Arm Rear End Differential Bushings: This kit specifically targets the bushings that stay attached to the rear end "ears" — the two upper control arm mounting points on the differential housing — addressing the most common wear point in these classic GM rear suspensions.
• Includes Polyurethane Washers to Prevent Bushing Walk: The kit ships with two bushings and two polyurethane washers. These washers are a critical detail — they keep the bushings from migrating side to side in service, a common failure mode with budget bushing kits that omit this hardware.
• Suitable for Both Street and Track Use: Whether you're building a reliable weekend cruiser or a competitive autocross/drag strip G-Body, UMI rates these bushings as an excellent upgrade for street-driven and track-used vehicles alike.
• Press-Fit Mounting: The bushings install via press fit into the existing rear end housing ears, maintaining factory mounting geometry without requiring modification to the housing.
• Made in the USA: UMI Performance manufactures these bushings domestically, consistent with their reputation for quality American-made suspension components.
• Black Finish: The black polyurethane color blends cleanly with underbody hardware for a stock-appearing, professional result.

Specifications

• Brand: UMI Performance
• Part Number: 3000-B
• Bushing Material: Polyurethane (High Durometer)
• Color: Black
• Mounting Type: Press Fit
• Country of Manufacture: USA
• Kit Contents: 2 polyurethane bushings, 2 polyurethane washers
• Application: GM A-Body / G-Body, 1965–1987/88

Fitment

These UMI Performance rear end housing bushings are designed to fit 1965–1987 GM A-Body and G-Body vehicles — a broad platform family that includes:

• Chevrolet Chevelle, Malibu, El Camino (A-Body)
• Chevrolet Monte Carlo (A-Body / G-Body)
• Buick Regal, Century (G-Body)
• Oldsmobile Cutlass Supreme (G-Body)
• Pontiac Grand Prix (G-Body)

The product title and listings reference model years spanning 1965 through 1987 (some sources note 1965–88). If you're unsure whether your specific year, trim, or rear axle configuration is covered, contact the ThreePiece.us fitment team before ordering — especially if your vehicle has been modified with a non-stock rear end housing.

What's in the Box

• 2 × UMI Performance High Durometer Polyurethane Rear End Housing Bushings (Black)
• 2 × Polyurethane Washers (to prevent bushing side-to-side migration)

Why Buy from ThreePiece.us

• Free Shipping on Every Order: All orders ship free — no minimum required, no hidden freight charges at checkout.
• Financing Through Affirm: Split your purchase into manageable payments with Affirm financing, available at checkout.
• Expert Fitment Support: Our team has served 10,000+ customers and specializes in verifying parts compatibility. If you have questions about whether this bushing kit fits your specific A-Body or G-Body application, call us at 813-535-5801 or use the Get Fitment Help contact form.
• In-Stock & Ready to Ship: This is a regularly stocked product — not a special order — so you won't wait weeks for your suspension rebuild parts.

Frequently Asked Questions

What exactly do these bushings replace — is this a full rear suspension bushing kit?

No — this is not a complete rear suspension bushing set. The UMI 3000-B specifically replaces the two upper control arm rear end differential bushings: the bushings that remain attached to the rear end housing "ears" where the upper control arms mount to the axle. If you need bushings for the control arm frame-side mounts or other locations, those are separate parts.

What's included — do I need to source any additional hardware?

The kit includes two polyurethane bushings and two polyurethane washers. The washers are included specifically to prevent the bushings from walking side to side during use — an important detail. No additional hardware is specified as required beyond standard press-fit installation tooling.

How are these installed — do I need a shop press?

These bushings use a press-fit mounting type, meaning they are pressed into the rear end housing ears. A shop press or suitable bushing press tool is typically required for proper installation. UMI does not specify that special proprietary tools are needed, but press-fit bushings generally should not be driven in with impact tools to avoid damaging the housing bore or the bushing.

Will these fit my 1988 G-Body or A-Body?

The product title covers 1965–1987, though at least one source notes compatibility extending to 1988 GM A-Body/G-Body applications. To confirm fitment for a borderline model year or an unusual configuration, reach out to the ThreePiece.us fitment team at 813-535-5801 before placing your order.