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

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: 2×3 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