1978-1983 G-Body Crossmember -TH400 with frame extension | RCG-400K
$365.00
Product Description
- Fits Models: GM RWD G-Body; Malibu, Monte Carlo, El Camino, Cutlass, Grand Prix, Regal, Century, LeMans, Caballero, Bonneville
- Fits Years: 78-83
- Fits Transmissions: TH400, 2004R
- If you are looking for improved performance check out our lighter weight, next generation of this crossmember, RCGNG-400KBLK. What is a lightweight crossmember? Find out here.
- We recommend a polyurethane transmission mount. The G Force GMTM is sold separately.
- G force has developed a frame extension, GF-FE100, to duplicate this longer frame on the early generation vehicles. The RCG-400K is pre-packaged with the frame extension.
- The primary frame change on the 1978-1988 generation of GM G-Body vehicles begins with 1984 models and the implementation of the 2004R transmission which required positioning the crossmember further to the rear of the vehicle. This is evidenced by two sets of frame holes for the crossmember on the driver side of the vehicle.
- Note: Some 1983 Hurst Olds are known to have the 2004R transmission and thus the longer frame rail which does not require the GF-FE100 frame extension that is included in this Kit. Some 1984 El Caminos retained the early frames and do require an GF-FE100 frame extension to run this crossmember.
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.
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.
SHOPTALK
See the G Force Crossmember Overview for more info.
This crossmember has been redesigned to accept the double slot bolt pattern of standard transmission mounts.
On all 78-88 G-Body crossmembers, the passenger side hump is the taller of the two.
On some installations, it is necessary to remove the catalytic converter heat shield from the passenger side floor pan. For all 78-88 G body crossmembers the passenger side hump is the taller of the two.
This generation of vehicle is prone to body bushing compression, even with some southern vehicles. If the floor pan is too close to allow installation, it may be necessary to replace the body bushings. Some customers have reported that with instances where there is slight interference they have been able to gently lift the floor pan with the assistance of a floor jack and a wood cushion to create enough clearance for installation.
This crossmember is installed so that the exhaust clearance humps are closed on the top and open on the bottom.See the G Force Crossmember Overview for more info.
This crossmember is installed with the G Force label facing the rear of the vehicle. However, another determining feature is the crossmember center tube which has a 1/2″ drain slot that is positioned on the bottom and on the passenger side next to the hump weldment.
This crossmember is installed so that the exhaust clearance humps are closed on the top and open on the bottom.
To use the provided 7/16″ hardware it is necessary to enlarge holes in your frame rails with a 1/2″ drill. If you choose to use the stock size 3/8″ hardware, it is strongly recommended to use new Grade #8 fasteners to compensate.
Discover more about the G Force Crossmember product line on these pages-
This crossmember has been redesigned to accept the double slot bolt pattern of standard transmission mounts.
On all 78-88 G-Body crossmembers, the passenger side hump is the taller of the two.
On some installations, it is necessary to remove the catalytic converter heat shield from the passenger side floor pan. For all 78-88 G body crossmembers the passenger side hump is the taller of the two.
This generation of vehicle is prone to body bushing compression, even with some southern vehicles. If the floor pan is too close to allow installation, it may be necessary to replace the body bushings. Some customers have reported that with instances where there is slight interference they have been able to gently lift the floor pan with the assistance of a floor jack and a wood cushion to create enough clearance for installation.
This crossmember is installed so that the exhaust clearance humps are closed on the top and open on the bottom.See the G Force Crossmember Overview for more info.
This crossmember is installed with the G Force label facing the rear of the vehicle. However, another determining feature is the crossmember center tube which has a 1/2″ drain slot that is positioned on the bottom and on the passenger side next to the hump weldment.
This crossmember is installed so that the exhaust clearance humps are closed on the top and open on the bottom.
To use the provided 7/16″ hardware it is necessary to enlarge holes in your frame rails with a 1/2″ drill. If you choose to use the stock size 3/8″ hardware, it is strongly recommended to use new Grade #8 fasteners to compensate.
Discover more about the G Force Crossmember product line on these pages-
Years
1978 | 1979 | 1980 | 1981 | 1982 | 1983
Models
| Buick: | Regal, Century |
| Chevrolet: | El Camino, Malibu, Monte Carlo |
| GMC: | Caballero |
| Oldsmobile: | Cutlass |
| Pontiac: | Grand Prix, LeMans, Bonneville |
Transmissions
TH400 | 2004R
Specifications
Weight: 37 lbsShipping Dimensions: 51 × 11 × 6 In
Finish: Black Powder Coated
Mounting Hardware: Included
-
Product Tags:
- 1978 Buick Century
- 1978 Buick Regal
- 1978 Chevrolet El Camino
- 1978 Chevrolet Malibu
- 1978 Chevrolet Monte Carlo
- 1978 GMC Caballero
- 1978 Oldsmobile Cutlass
- 1978 Pontiac Bonneville
- 1978 Pontiac Grand Prix
- 1978 Pontiac LeMans
- 1978-1983
- 1979 Buick Century
- 1979 Buick Regal
- 1979 Chevrolet El Camino
- 1979 Chevrolet Malibu
- 1979 Chevrolet Monte Carlo
- 1979 GMC Caballero
- 1979 Oldsmobile Cutlass
- 1979 Pontiac Bonneville
- 1979 Pontiac Grand Prix
- 1979 Pontiac LeMans
- 1980 Buick Century
- 1980 Buick Regal
- 1980 Chevrolet El Camino
- 1980 Chevrolet Malibu
- 1980 Chevrolet Monte Carlo
- 1980 GMC Caballero
- 1980 Oldsmobile Cutlass
- 1980 Pontiac Bonneville
- 1980 Pontiac Grand Prix
- 1980 Pontiac LeMans
- 1981 Buick Century
- 1981 Buick Regal
- 1981 Chevrolet El Camino
- 1981 Chevrolet Malibu
- 1981 Chevrolet Monte Carlo
- 1981 GMC Caballero
- 1981 Oldsmobile Cutlass
- 1981 Pontiac Bonneville
- 1981 Pontiac Grand Prix
- 1981 Pontiac LeMans
- 1982 Buick Century
- 1982 Buick Regal
- 1982 Chevrolet El Camino
- 1982 Chevrolet Malibu
- 1982 Chevrolet Monte Carlo
- 1982 GMC Caballero
- 1982 Oldsmobile Cutlass
- 1982 Pontiac Bonneville
- 1982 Pontiac Grand Prix
- 1982 Pontiac LeMans
- 1983 Buick Century
- 1983 Buick Regal
- 1983 Chevrolet El Camino
- 1983 Chevrolet Malibu
- 1983 Chevrolet Monte Carlo
- 1983 GMC Caballero
- 1983 Oldsmobile Cutlass
- 1983 Pontiac Bonneville
- 1983 Pontiac Grand Prix
- 1983 Pontiac LeMans
- 2004r crossmember
- 78 Buick Century
- 78 Buick Regal
- 78 Chevrolet El Camino
- 78 Chevrolet Malibu
- 78 Chevrolet Monte Carlo
- 78 GMC Caballero
- 78 Oldsmobile Cutlass
- 78 Pontiac Bonneville
- 78 Pontiac Grand Prix
- 78 Pontiac LeMans
- 79 Buick Century
- 79 Buick Regal
- 79 Chevrolet El Camino
- 79 Chevrolet Malibu
- 79 Chevrolet Monte Carlo
- 79 GMC Caballero
- 79 Oldsmobile Cutlass
- 79 Pontiac Bonneville
- 79 Pontiac Grand Prix
- 79 Pontiac LeMans
- 80 Buick Century
- 80 Buick Regal
- 80 Chevrolet El Camino
- 80 Chevrolet Malibu
- 80 Chevrolet Monte Carlo
- 80 GMC Caballero
- 80 Oldsmobile Cutlass
- 80 Pontiac Bonneville
- 80 Pontiac Grand Prix
- 80 Pontiac LeMans
- 81 Buick Century
- 81 Buick Regal
- 81 Chevrolet El Camino
- 81 Chevrolet Malibu
- 81 Chevrolet Monte Carlo
- 81 GMC Caballero
- 81 Oldsmobile Cutlass
- 81 Pontiac Bonneville
- 81 Pontiac Grand Prix
- 81 Pontiac LeMans
- 82 Buick Century
- 82 Buick Regal
- 82 Chevrolet El Camino
- 82 Chevrolet Malibu
- 82 Chevrolet Monte Carlo
- 82 GMC Caballero
- 82 Oldsmobile Cutlass
- 82 Pontiac Bonneville
- 82 Pontiac Grand Prix
- 82 Pontiac LeMans
- 83 Buick Century
- 83 Buick Regal
- 83 Chevrolet El Camino
- 83 Chevrolet Malibu
- 83 Chevrolet Monte Carlo
- 83 GMC Caballero
- 83 Oldsmobile Cutlass
- 83 Pontiac Bonneville
- 83 Pontiac Grand Prix
- 83 Pontiac LeMans
- all
- Buick
- chevrolet
- chevy
- cross member
- cross member frame
- crossmember
- crossmember bar
- crossmember car
- crossmember frame
- Crossmember Menu
- DiscountEligible
- g force
- g force performance
- G-Body
- gbody
- gforce
- gforce performance
- gforce performance products
- gid://shopify/Collection/411467120894
- GM-3
- gmc
- Make_Buick
- Make_Chevrolet
- Make_GMC
- Make_Oldsmobile
- Make_Pontiac
- Model_Bonneville
- Model_Caballero
- Model_Century
- Model_Cutlass
- Model_El Camino
- Model_Grand Prix
- Model_LeMans
- Model_Malibu
- Model_Monte Carlo
- Model_Regal
- olds
- Oldsmobile
- Parts Menu
- Pontiac
- rcg
- RCG-400K
- RCG400K
- transmission cross member
- transmission crossmember
- Transmission_2004R
- Transmission_TH400
- usamade
- Year_1978
- Year_1979
- Year_1980
- Year_1981
- Year_1982
- Year_1983