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1977-1990 B-Body Crossmember | RCB3-400

$325.00
SKU RCB3-400

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  • Fits Models: Caprice, Impala, LeSabre, Estate, Custom Cruiser, 88, Bonneville, Parisienne, Catalina, Laurentian, Safari  
  • Fits Years: 77-90
  • Fits Transmissions: TH400 Short Tail, 2004R, 700R4 with B-Body tailshaft Mount
  • For Classic B-Body builders, we€™ve designed a direct bolt-in transmission crossmember to accommodate both a 2004R or TH400 short tail transmissions, as well as a 700R4 with the tailshaft transmission mount.  One crossmember, both transmissions!  
  • We accommodate both by using a second set of mounting holes on the crossmember which allows you to position the crossmember in two different locations while still using the factory crossmember mounting locations. 
  • No drilling, cutting, grinding, or welding is required.  
  • When considering the popular 700R4, there are two basic transmission mount locations. One version utilizes a transmission mount directly behind the transmission pan on the transmission case. With the other version the transmission mount is located further forward and bolts to the tailshaft housing. It is crucial that you properly determine which mount location your 700R4 uses. The RCB3-400 is designed to accommodate the longer tailshaft mount. If you have the shorter case mount transmission, you will need to purchase our RCB3-700 crossmember.
  • We recommend a polyurethane transmission mount. The GMTM is sold separately.

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Product Description

  • Fits Models: Caprice, Impala, LeSabre, Estate, Custom Cruiser, 88, Bonneville, Parisienne, Catalina, Laurentian, Safari  
  • Fits Years: 77-90
  • Fits Transmissions: TH400 Short Tail, 2004R, 700R4 with B-Body tailshaft Mount
  • For Classic B-Body builders, we€™ve designed a direct bolt-in transmission crossmember to accommodate both a 2004R or TH400 short tail transmissions, as well as a 700R4 with the tailshaft transmission mount.  One crossmember, both transmissions!  
  • We accommodate both by using a second set of mounting holes on the crossmember which allows you to position the crossmember in two different locations while still using the factory crossmember mounting locations. 
  • No drilling, cutting, grinding, or welding is required.  
  • When considering the popular 700R4, there are two basic transmission mount locations. One version utilizes a transmission mount directly behind the transmission pan on the transmission case. With the other version the transmission mount is located further forward and bolts to the tailshaft housing. It is crucial that you properly determine which mount location your 700R4 uses. The RCB3-400 is designed to accommodate the longer tailshaft mount. If you have the shorter case mount transmission, you will need to purchase our RCB3-700 crossmember.
  • 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.

One crossmember for a 2004R or TH400 short tail transmissions, as well as a 700R4 that has the tailshaft transmission mount is accomplished by a second set of mounting holes on the crossmember to allow positioning the crossmember in the two different locations.

Years

1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 | 1987 | 1988 | 1989 | 1990

Models

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

Transmissions

TH400 Short Tail | 2004R | 700R4 with B-body Tailshaft Mount

Specifications

Weight: 34 lbs

Shipping Dimensions: 51 × 19 × 7 In

Finish: Black Powder Coated

Mounting Hardware: Not Included

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