UMI Performance 78-88 GM G-Body Modular Adjustable Transmission Crossmember - Black

UMI3108-B
Crossmembers
4 Units In Stock - Ships Next Business Day
$ 349.99
$ 349.99

SKU: 3108-B

UMI Performance 78-88 GM G-Body Modular Adjustable Transmission Crossmember - Black

UMI Performance delivers a modular adjustable transmission crossmember system for 1978-1988 GM G-Body vehicles including Chevrolet Malibu, Monte Carlo, El Camino, Buick Regal, Oldsmobile Cutlass Supreme and Pontiac Grand Prix. This black powder coated steel crossmember uses laser-cut tabs and slots for precise multiple mounting locations to set your driveline angle. It provides clearance for large diameter dual exhausts while supporting a range of transmissions for reliable performance.

Key Features

  • Modular Design: Laser-cut tab and slot construction allows quick assembly of different brace configurations for various transmission types like TH350, TH400, 700R4, Powerglide and more.
  • Adjustable Driveline Angle: Multiple mounting holes enable exact pinion angle adjustments to reduce vibrations and improve power transfer.
  • Dual Exhaust Clearance: Brace geometry creates ample space for 3-inch or larger exhaust systems without modifications.
  • Heavy-Duty Construction: 2x3 inch rectangular steel tubing with black powder coat finish resists corrosion and withstands high torque loads.
  • Lightweight Yet Strong: Total assembled brace weight of 22 lbs balances strength and reduced unsprung weight for better handling.

Product Notes

  • Direct bolt-on replacement for stock crossmember using factory mounting points.
  • Hardware kit included for complete installation.
  • Ships in one oversized box measuring 38 x 12 x 8 inches with 25 lbs total shipping weight.

Installation Notes

  • Professional installation recommended.
  • Support transmission during install and verify driveline angles with angle finder tool.
  • Compatible with stock or aftermarket motor mounts, no transmission mount alterations needed.

This Part Fits

Year Make Model Submodel
1978-1980 GMC Caballero Laredo
1981 GMC Caballero Royal Knight
1980 Oldsmobile Cutlass Base
1980-1981 Oldsmobile Cutlass Brougham
1980-1981 Oldsmobile Cutlass LS
1978-1979 Oldsmobile Cutlass Vista Cruiser
1978-1983 Chevrolet Malibu Classic
1978-1980 Chevrolet Malibu Classic Estate
1978-1981 Chevrolet Malibu Classic Landau
1979-1980 Chevrolet Malibu Classic Sport
1979-1980 Chevrolet Malibu Estate
1979 Chevrolet Malibu Landau
1978-1987 Buick Regal Base
1982-1983 Buick Regal Estate Wagon
1987 Buick Regal GNX
1984-1987 Buick Regal Grand National
1978-1987 Buick Regal Limited
1982 Buick Regal Limited Turbo
1978-1982 Buick Regal Sport
1983-1986 Buick Regal T-Type
1978-1987 Chevrolet El Camino Base
1978 Chevrolet El Camino Conquista
1981-1986 Chevrolet El Camino Conquista
1979-1981 Chevrolet El Camino Royal Knight
1978-1987 Chevrolet El Camino SS
1978-1981 Chevrolet Malibu Base
1978-1988 Oldsmobile Cutlass Supreme Base
1978-1987 Oldsmobile Cutlass Supreme Brougham
1988 Oldsmobile Cutlass Supreme Classic
1988 Oldsmobile Cutlass Supreme Classic Brougham
1988 Oldsmobile Cutlass Supreme Indy 500 Pace Car
1978 Chevrolet Monte Carlo Sport
1980 Chevrolet Monte Carlo Sport
1983-1988 Chevrolet Monte Carlo SS
1981-1986 GMC Caballero Amarillo
1978-1987 GMC Caballero Base
1981 GMC Caballero Conquista
1978-1987 GMC Caballero Diablo
1979 Chevrolet Malibu Police
1979-1980 Chevrolet Malibu Sport
1979 Chevrolet Monte Carlo Base
1981-1988 Chevrolet Monte Carlo Base
1983 Chevrolet Monte Carlo CL
1978-1981 Chevrolet Monte Carlo Landau
1986-1988 Chevrolet Monte Carlo LS
1979 Oldsmobile Cutlass Vista Cruiser Brougham
1978-1984 Oldsmobile Cutlass Calais Base
1983-1984 Oldsmobile Cutlass Calais Hurst
1982-1983 Oldsmobile Cutlass Ciera Base
1988 Oldsmobile Cutlass Ciera Base
1982-1988 Oldsmobile Cutlass Ciera Brougham
1982-1988 Oldsmobile Cutlass Ciera LS
1986-1988 Oldsmobile Cutlass Ciera S
1986-1988 Oldsmobile Cutlass Ciera SL
1980-1983 Oldsmobile Cutlass Cruiser Base
1980-1981 Oldsmobile Cutlass Cruiser Brougham
1978-1979 Oldsmobile Cutlass Salon 442
1984-1985 Oldsmobile Cutlass Ciera Cruiser LS
1983 Oldsmobile Cutlass Ciera ES
1985-1986 Oldsmobile Cutlass Ciera ES
1985-1987 Oldsmobile Cutlass Ciera GT
1985-1986 Oldsmobile Cutlass Ciera Holiday
1988 Oldsmobile Cutlass Ciera International
1984-1986 Pontiac Bonneville LE
1978-1987 Pontiac Grand Prix Base
1981-1987 Pontiac Grand Prix Brougham
1984-1987 Pontiac Grand Prix LE
1978-1983 Pontiac Grand Prix LJ
1978-1980 Pontiac Grand Prix SJ
1985-1986 Oldsmobile Cutlass Salon 442
1978-1980 Oldsmobile Cutlass Salon Base
1985-1987 Oldsmobile Cutlass Salon Base
1978-1980 Oldsmobile Cutlass Salon Brougham
1979 Oldsmobile Cutlass Salon Hurst
1987 Oldsmobile Cutlass Supreme 442
1988 Oldsmobile Cutlass Supreme International
1981 Oldsmobile Cutlass Supreme LS
1985 Oldsmobile Cutlass Supreme LS
1988 Oldsmobile Cutlass Supreme SL
1982-1986 Pontiac Bonneville Base
1982-1986 Pontiac Bonneville Brougham

Why Choose UMI Performance?

  • Over 20 years specializing in GM G-Body chassis components.
  • Made in USA with high-grade steel and TIG-welded joints for durability.
  • Designed and tested on real G-Body vehicles for exact fit and function.

Frequently Asked Questions

  • Q: Does this fit my 1984 Buick Grand National with TH400 transmission?
    A: Yes, the modular braces include specific options for TH400 and other GM automatics used in 78-88 G-Bodies like the Grand National.
  • Q: What material and finish does it have?
    A: Constructed from 11-gauge steel tubing with durable black powder coat finish for long-lasting rust protection.
  • Q: Is welding required for installation?
    A: No welding needed, all components bolt together using included Grade 8 hardware and factory locations.

Shipping & Handling

  • Method: UPS Ground or Freight for oversized items
  • Availability: In stock - ships same or next business day
  • Packaging: Securely packed in one 38 x 12 x 8 inch box
  • Weight: 22 lbs product weight, 25 lbs shipping weight

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