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1977-1990 B-Body Crossmember | RCB3-700

$299.00
SKU RCB3-700

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  • Fits Models: Impala, LeSabre, Estate, Custom Cruiser, 88, Bonneville, Parisienne, Catalina, Laurentian, Safari
  • Fits Years: 77-90
  • Fits Transmissions: 700R4, 4L60, 4L60E, TKO 500, TKO 600
  • The RCB3-700 is designed for the 700R4 transmission with a case mount transmission mount. For a 700R4 with a tailshaft mount purchase the RCB3-400 crossmember instead.
  • Engineered with 2 mounting slots to accept a standard height transmission mount.
  • We recommend a polyurethane transmission mount. The GMTM is sold separately. 

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Product Description

  • Fits Models: Impala, LeSabre, Estate, Custom Cruiser, 88, Bonneville, Parisienne, Catalina, Laurentian, Safari
  • Fits Years: 77-90
  • Fits Transmissions: 700R4, 4L60, 4L60E, TKO 500, TKO 600
  • The RCB3-700 is designed for the 700R4 transmission with a case mount transmission mount. For a 700R4 with a tailshaft mount purchase the RCB3-400 crossmember instead.
  • Engineered with 2 mounting slots to accept a standard height transmission mount.
  • We recommend a polyurethane transmission mount. The GMTM is sold separately. 

The G Force Patented Transmission Crossmember

Performance Engineered from Start to Finish

Performance
Engineered

Engineered and independently tested to withstand the rigors of the track, our crossmembers exceed the demands of even the most challenging roads.

Easy Installation.
It’s Foolproof!

Our unique bolt-to-frame design eliminates cutting and welding. The distinctive double-hump accommodates true dual exhaust. Our crossmembers are guaranteed to be a perfect fit.

SHOPTALK

See the G Force Crossmember Overview for more info.

Many G Force Crossmembers utilize the early GM double stud transmission mount configuration, for the increased strength aspects. Should your vehicle originally be equipped with a single centered stud transmission mount, simply replace your transmission mount with the early style.

For vehicles originally equipped with 3/8″ crossmember bolts, open existing holes on frame to 1/2″. If you prefer to retain 3/8″fasteners, upgrade the installations hardware to Grade 8 bolts and hardened flat washers.

Years

1977 | 1978 | 1979 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990

Models

Buick: Le Sabre, Estate
Chevrolet: Impala
Oldsmobile: 88, Custom Cruiser
Pontiac: Bonneville, Parisienne, Catalina, Laurentian, Safari

Transmissions

700R4 | 4L60 | 4L60E | TKO 500 | TKO 600

Specifications

Weight: 32 lbs

Shipping Dimensions: 53 × 11 × 7 In

Finish: Black Powder Coated

Mounting Hardware: Included

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