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1977-1990 B-Body crossmember | RCB3-4L80

1977-1990 B-Body crossmember | RCB3-4L80

by G Force Performance Products
$359.00
SKU RCB3-4L80

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  • Fits Models: Caprice, Impala, Biscayne, Electra, Le Sabre, Catalina, Bonneville, Delta 88, Starfire, Delmont, Custom Cruiser, Estate Wagon, Parisienne, Riviera, Safari
  • Fits Years: 77-90
  • Fits Transmissions: 4L80E, 4L85E
  • A new transmission mount is recommended. Use the centered type only, offset mounts will not fit.

Customer Reviews

Based on 5 reviews
100%
(5)
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(0)
0%
(0)
0%
(0)
0%
(0)
A
Andy mills
83’ Buick LeSabre

This crossmember fit like a glove. I was going to fab one up, but I was worried about my angle for the driveshaft. This took all the guesswork out of it, and my 4l80e is sitting pretty. I would highly recommend this product, the welds look great, and it is very, very sturdy. I’m not a guy to write reviews normally, so that should tell you something. If you have a B body, just get this.

Thanks for taking the time to review this Crossmember. Glad you got a perfect fit!

E
Edward Black
86 caprice

Fit well an worked amazing..4l80e transmission with aftermarket exhaust.

M
Mack Anderson

I have a 86 Caprice classic it fits perfect with the 4L 80 transmission that I have

S
Sandy Gibson
Great product

Took the guess work out of my swap. Worth every penny!

w
warren jackson
B body crossmember

Part fits perfectly and also has great clearance for exhaust.

Product Description

  • Fits Models: Caprice, Impala, Biscayne, Electra, Le Sabre, Catalina, Bonneville, Delta 88, Starfire, Delmont, Custom Cruiser, Estate Wagon, Parisienne, Riviera, Safari
  • Fits Years: 77-90
  • Fits Transmissions: 4L80E, 4L85E
  • A new transmission mount is recommended. Use the centered type only, offset mounts will not fit.
PRODUCT DETAILS  

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, each crossmember exceeds the demands of even the most challenging roads.

LEARN MORE

Easy Installation.
It’s Foolproof!

Our unique bolt-to-frame design eliminates cutting and welding. The distinctive double-hump accommodates true dual exhaust. A G Force crossmember is guaranteed to be a perfect fit.

DOWNLOAD INSTRUCTIONS

SHOPTALK

See the G Force Crossmember Overview for more info.

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

Some minor contact between the floorplan and the crossmember may occur due to body bushing settling and deterioration, or a bowed floor pan. Usually, this is not a problem. A hydraulic floor jack with a wood cushion will correct a bowed floor.

Discover more about the G Force Crossmember product line on these pages-

Years

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

Models

Buick: Electra, Le Sabre, Estate Wagon, Riviera
Chevrolet: Caprice, Impala, Biscayne, Safari
Oldsmobile: Delta 88, Starfire, Delmont, Custom Cruiser
Pontiac: Catalina, Bonneville, Parisienne

Transmissions

TH350 | TH200 | TH250 | Muncie | T10 | Super T10 | Powerglide | Saginaw

Specifications

Weight: 37 lbs

Shipping Dimensions: 51 × 19 × 6 In

Finish: Black Powder Coated

Mounting Hardware: Included

Customer Reviews

Based on 5 reviews
100%
(5)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
A
Andy mills
83’ Buick LeSabre

This crossmember fit like a glove. I was going to fab one up, but I was worried about my angle for the driveshaft. This took all the guesswork out of it, and my 4l80e is sitting pretty. I would highly recommend this product, the welds look great, and it is very, very sturdy. I’m not a guy to write reviews normally, so that should tell you something. If you have a B body, just get this.

Thanks for taking the time to review this Crossmember. Glad you got a perfect fit!

E
Edward Black
86 caprice

Fit well an worked amazing..4l80e transmission with aftermarket exhaust.

M
Mack Anderson

I have a 86 Caprice classic it fits perfect with the 4L 80 transmission that I have

S
Sandy Gibson
Great product

Took the guess work out of my swap. Worth every penny!

w
warren jackson
B body crossmember

Part fits perfectly and also has great clearance for exhaust.

    Product Tags:
  • 1977-1990
  • all
  • B-Body
  • bbody
  • Buick
  • caprice crossmember
  • chevrolet
  • chevy
  • cross member
  • cross member frame
  • crossmember
  • crossmember bar
  • crossmember car
  • crossmember frame
  • g force
  • g force performance
  • gforce
  • gforce performance
  • gforce performance products
  • Make_Buick
  • Make_Chevrolet
  • Make_Oldsmobile
  • Make_Pontiac
  • Model_Biscayne
  • Model_Bonneville
  • Model_Caprice
  • Model_Catalina
  • Model_Custom Cruiser
  • Model_Delmont
  • Model_Delta 88
  • Model_Electra
  • Model_Estate Wagon
  • Model_Impala
  • Model_Le Sabre
  • Model_LeSabre
  • Model_Parisienne
  • Model_Riviera
  • Model_Safari
  • Model_Starfire
  • olds
  • Oldsmobile
  • Part Type_Crossmembers
  • Platform_B-body
  • Pontiac
  • rcb3
  • rcb3 4l80
  • rcb34l80
  • transmission cross member
  • transmission crossmember
  • Transmission Group_GM-4
  • Transmission_4L80E
  • Transmission_4L85E
  • Year_1977
  • Year_1978
  • Year_1979
  • Year_1980
  • Year_1981
  • Year_1982
  • Year_1983
  • Year_1984
  • Year_1985
  • Year_1986
  • Year_1987
  • Year_1988
  • Year_1989
  • Year_1990