Old frames with riveted or no crossmembers can flex due to elongation of the rivet holes. This issue becomes more pronounced when modern engines with higher horsepower are installed, leading to increased frame flex under torque. Progressive Automotive offers specially designed X-members with transmission cross members that help eliminate the flex caused by age and increased power.
Our X-members are designed for either automatic and manual transmissions. Each X-member includes a steel, bolt-in transmission mount, allowing for easy removal from the bottom without the need to pull the motor from the vehicle.
Top and bottom side tubes are formed as one piece, as opposed to welded square or rectangular tubes. This design approach eliminates the chance of stress cracks that can occur, ensuring greater strength and durability.
Their X-members are also designed to allow for the passage of 3″ exhaust with a half-inch clearance. It’s worth noting that the availability of space for exhaust may be limited when underfloor pedal assemblies are used.
If your vehicle isn’t listed in their offerings, contact us for our X-member Tech sheet.
Progressive Automotive takes pride in manufacturing their products at their shop in Baltimore, Ohio, U.S.A. emphasizing their commitment to quality and craftsmanship.
Boxing Plates for C-channel style frame rails can be found here:
Brake and Brake/Clutch Pedal Assemblies with Booster mounts can be found here:
Optional items are listed at the bottom of this page
*Tubular X-member kits, include:
(2) X-member sides, assembled
(1) Steel trans. Mount with mounting hardware
(1) Rear connector
and either
(1) Straight connector & Drop connector
or
(1) K- connector
Connector tube are coped (notched) for fit and marked on the sides for alignment.
Chevrolet/G.M.C.
1931-32 Chevy car/1931-33 truck
For Automatic Transmissions XT-CA-AT $579
For Manual Transmissions XT-CA-MT $609
1933 Chevy Master/Standard car
For Automatic Transmissions XT-CB-AT $579
For Manual Transmissions XT-CB-MT $609
1934 Chevy Master
For Automatic Transmissions XT-CC-AT $579
For Manual Transmissions XT-CC-MT $609
1934-35 Chevy Standard
For Automatic Transmissions XT-CD-AT $579
For Manual Transmissions XT-CD-MT $609
1935 Master/1936 Chevy Standard
For Automatic Transmissions XT-CE-AT $579
For Manual Transmissions XT-CE-MT $609
1936 Chevy Master
For Automatic Transmissions XT-CF-AT $579
For Manual Transmissions XT-CF-MT $609
1937-39 Chevy
*For Automatic Transmissions XT-CG-AT $579
*For Manual Transmissions XT-CG-MT $609
*Recommended (1) 7″ & (1) 14″ Top Hat Frame re-enforcement plates can be found here
1940 Chevy
*For Automatic Transmissions XT-CH-AT $659
*For Manual Transmissions XT-CH-MT $689
*Recomended (1) 7″ & (1) 14″ Top Hat Frame re-enforcement plates can be found here
1941-48 Chevy
*For Automatic Transmissions XT-CI-AT $659
*For Manual Transmissions XT-CI-MT $689
*Recommender (1) 7″ & (1) 14″ Top Hat Frame re-enforcement plates can be found here
1949-54 Chevy
*For Automatic Transmissions XT-CK-AT $579
*For Manual Transmissions XT-CK-MT $609
*Recommended (1) 7″ & (1) 14″ Top Hat Frame re-enforcement plates can be found here
1955-57 Chevy
For Automatic or Manual Transmissions XT-CJ $579
1934-36 Chevy truck
For Automatic Transmissions, Short Bed XT-CTB-AT-SB $579
For Manual Transmissions, Short Bed XT-CTB-MT-SB $609
For Automatic Transmissions, Long Bed XT-CTB-AT-LB $609
For Manual Transmissions, Long Bed XT-CTB-MT-LB $659
1937-40 Chevy truck
For Automatic Transmissions, Short Bed XT-CTC-AT-SB $579
For Manual Transmissions, Short Bed XT-CTC-MT-SB $609
For Automatic Transmissions, Long Bed XT-CTC-AT-LB $609
For Manual Transmissions, Long Bed XT-CTC-MT-LB $659
1941-46 Chevy truck
For Automatic Transmissions, Short Bed XT-CTD-AT-SB $579
For Manual Transmissions, Short Bed XT-CTD-MT-SB $609
For Automatic Transmissions, Long Bed XT-CTD-AT-LB $609
For Manual Transmissions, Long Bed XT-CTD-MT-LB $659
1947-55 (1st Ser.) Chevy truck
For Automatic Transmissions, Short Bed XT-CTE-AT-SB $579
For Manual Transmissions, Short Bed XT-CTE-MT-SB $609
For Automatic Transmissions, Long Bed XT-CTE-AT-LB $609
For Manual Transmissions, Long Bed XT-CTE-MT-LB $659
1955 (2nd Ser.)-59 Chevy truck
For Automatic Transmissions, Short Bed XT-CTF-AT-SB $579
For Manual Transmissions, Short Bed XT-CTF-MT-SB $609
For Automatic Transmissions, Long Bed XT-CTF-AT-LB $609
For Manual Transmissions, Long Bed XT-CTF-MT-LB $659
Ford
1932 Ford car/1932-33 (1st Ser.) truck
For Automatic Transmissions XT-FB-AT $579
For Manual Transmissions XT-FB-MT $609
1933-34 Ford car/1933 (2nd Ser.)-34 truck
For Automatic Transmissions XT-FC-AT $579
For Manual Transmissions XT-FC-MT $609
1935-40 Ford car/1935-41 truck
For Automatic Transmissions XT-FD-AT $659
For Manual Transmissions XT-FD-MT $689
1941-48 Ford car
For Automatic Transmissions XT-FE-AT $659
For Manual Transmissions XT-FE-MT $689
1942-47 Ford truck
For Automatic Transmissions, Short Bed XT-FTE-AT-SB $579
For Manual Transmissions, Short Bed XT-FTE-MT-SB $609
For Automatic Transmissions, Long Bed XT-FTE-AT-LB $609
For Manual Transmissions, Long Bed XT-FTE-MT-LB $659
1948-52 Ford truck
For Automatic Transmissions, Short Bed XT-FTF-AT-SB $579
For Manual Transmissions, Short Bed XT-FTF-MT-SB $609
For Automatic Transmissions, Long Bed XT-FTF-AT-LB $609
For Manual Transmissions, Long Bed XT-FTF-MT-LB $659
1953-56 Ford truck
For Automatic Transmissions, Short Bed XT-FTG-AT-SB $579
For Manual Transmissions, Short Bed XT-FTG-MT-SB $609
For Automatic Transmissions, Long Bed XT-FTG-AT-LB $609
For Manual Transmissions, Long Bed XT-FTG-MT-LB $659
1957-63 Ford truck
For Short Bed, specify transmission XT-FTH-SB $579
1964-72 Ford truck
For Short Bed, specify transmission XT-FTI-SB $959
Plymouth/Dodge
1933 Plymouth car/1933-35 (1st Ser.) Dodge truck
For Automatic Transmissions XT-PA-AT $579
For Manual Transmissions XT-PA-MT $609
1934 Plymouth car
For Automatic Transmissions XT-PB-AT $579
For Manual Transmissions XT-PB-MT $609
1935-36 Plymouth car
For Automatic Transmissions XT-PC-AT $579
For Manual Transmissions XT-PC-MT $609
Oldsmobile
1956 Oldsmobile, for Automatic or Manual transmission XT-O-56 $639
Optional Items
Vulcanized G.M transmission mount with attachment hardware TM-RM-C $6
Vulcanized Ford transmission mount with attachment hardware TM-RM-F $6
Drive Shaft Loop kits, recommended for High horsepower vehicle XT-DLK $95