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UMI Performance Adjustable Rear Upper Control Arms for 1964-1967 GM A-Body
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UMI Performance Adjustable Rear Upper Control Arms for 1964-1967 GM A-Body

$ 249.99 $ 244.99
$ 244.99

Set Rear Pinion Angle Without Removing the Control Arms

Correct pinion-angle setup supports traction, smooth driveline operation, and reduced wheel hop. UMI Performance 4026-B is built for 1964-1967 applications from Buick, Chevrolet, Oldsmobile, and Pontiac shown in the Fitment table. Key details are on-car length adjustment for precise rear pinion-angle setup and UMI chromoly double adjusters for adjustment without removing the arms.

Key Features

  • UMI Performance 4026-B: On-car length adjustment supports precise rear pinion-angle setup
  • UMI chromoly double adjusters permit adjustment without removing the arms
  • Greaseable polyurethane bushings use zinc-plated steel sleeves
  • Chromoly threaded adapters reinforce the adjustable connection
  • CNC laser-cut 1/4-inch upper mounting pads
  • Tubular mild-steel construction with black powder-coated finish
  • Direct bolt-on installation with no vehicle modifications
  • Manufactured in the United States

Fitment

Use UMI Performance 4026-B only for the applications below. Confirm every listed qualifier and exclusion.

Years Make Model Details
1965-1967 Buick Gran Sport Rear upper position; GM A-body
1964-1967 Buick Skylark Rear upper position; GM A-body
1964-1967 Buick Special Rear upper position; GM A-body
1964-1967 Buick Sportwagon Rear upper position; GM A-body
1964-1967 Chevrolet Chevelle Rear upper position; GM A-body
1964-1967 Chevrolet El Camino Rear upper position; GM A-body
1964-1967 Chevrolet Malibu Rear upper position; GM A-body
1964-1967 Oldsmobile 442 Rear upper position; GM A-body
1964-1967 Oldsmobile Cutlass Rear upper position; GM A-body
1964-1967 Oldsmobile F85 Rear upper position; GM A-body
1964-1967 Oldsmobile Vista Cruiser Rear upper position; GM A-body
1964-1967 Pontiac GTO Rear upper position; GM A-body
1964-1967 Pontiac Tempest Rear upper position; GM A-body
1964-1967 Pontiac Lemans Rear upper position; GM A-body

Specifications

Detail Value
Brand UMI Performance
Manufacturer Part Number 4026-B
Product Type Rear Upper Control Arms
Position Rear upper
Construction Tubular mild steel
Finish Black powder coat
Adjustment On-car adjustable chromoly double adjusters
Bushings Greaseable polyurethane with zinc-plated steel sleeves
Upper Mounting Pads CNC laser-cut 1/4-inch steel
Installation Direct bolt-on; no modifications required
Estimated Installation Time 1-2 hours
Required Tools Basic hand tools and safely rated lifting equipment
Country of Manufacture United States
Quantity Pair

What's Included

  • Two adjustable rear upper control arms for UMI Performance 4026-B
  • Four polyurethane bushings
  • Two steel sleeves
  • Two grease fittings
  • Installation instructions
  • Not included: Factory rear-end mounting hardware
  • Not included: Lower control arms
  • Not included: Specialty alignment or pinion-angle measuring tools

About UMI Performance

UMI Performance designs and manufactures suspension and chassis components in Philipsburg, Pennsylvania, using North American materials and application-specific fabrication.

Related Parts

  • Check every application-matched fastener, seal, mounting part, and companion component required for the complete installation.

FAQ

What is the 4026-B?

It is a UMI Performance rear upper control arms for 1964-1967 applications from Buick, Chevrolet, Oldsmobile, and Pontiac shown in the Fitment table, built around On-car length adjustment supports precise rear pinion-angle setup.

What is the main benefit of this part?

On-car length adjustment supports precise rear pinion-angle setup; UMI chromoly double adjusters permit adjustment without removing the arms.

Which applications does it fit?

It is intended for 1964-1967 applications from Buick, Chevrolet, Oldsmobile, and Pontiac shown in the Fitment table. Use the Fitment table and every listed qualifier before ordering.

What comes with this product?

Two adjustable rear upper control arms; Four polyurethane bushings; Two steel sleeves; Two grease fittings.

What construction details should I know?

Tubular mild steel; Black powder coat; Greaseable polyurethane with zinc-plated steel sleeves.

What should be checked before installation?

Compare the old and new parts, confirm position and orientation, and verify all application notes, clearances, fasteners, and required companion parts.

How should this part be installed?

Confirm the exact vehicle application and compare both arms with the factory rear upper control arms before removal. Follow all torque, alignment, bleeding, calibration, or break-in procedures that apply.

What warranty applies?

A reputable retailer lists a limited two-year manufacturer warranty; confirm current coverage and exclusions with UMI Performance.

Installation Instructions

  1. Confirm the exact vehicle application and compare both arms with the factory rear upper control arms before removal.
  2. Support the vehicle by the frame, place a jack under the differential, and replace only one rear upper control arm at a time.
  3. Set each adjustable arm to the factory arm length, grease the polyurethane bushings, and install it using the retained factory hardware.
  4. Adjust the installed arms evenly to establish the required pinion angle, then tighten the adjuster jam nuts and all mounting hardware to the vehicle manufacturer's specifications.
  5. Recheck clearance, fastener torque, and safe rear-suspension operation before returning the vehicle to service.

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