Triangulated 4-bar Rear Suspension

Progressive Automotive Triangulated 4-bar supension with Ride Tech HQ coil-overs & Wilwood brakes
Progressive Automotive Triangulated 4-bar suspension with Ride Tech HQ coil-overs & Wilwood brakes

 Our Triangulated 4 bar rear suspensions are made from heavy wall, seamless tubing and include urethane bushings. Bars are TIG welded for strength and appearance. Ride heights can be custom tailored to you taste during your installation. All bars have an one end adjustable to allow easy adjustment of the pinion angle. Frame rails must be boxed for bracket attachment points. Economic urethane bushings are standard with Ride Tech R-Joint as an upgrade.

  We also custom build for non-stock frames or most vehicles not listed. Inquire for details. Vehicles must have trim-able inner fender panels for upper control arm clearance.

The kit are designed for steel housing rear ends, such as 8″ and 9″ Ford and 8 3/4 Chrysler rear ends, where steel brackets can be welded to a steel housing. These kits are not designed for Dana style rear ends that have cast housings. See our Parallel 4-bar for Dana style rear ends.

  UPS Shipping and packaging is additional. Proudly manufactured at our shop in Baltimore Ohio.

All Triangulated 4-bar kits include:  (2) Upper bar, (2) Lower bar, (4) Upper bar rear axle mounts with hardware, (2) Upper bar frame mounts with hardware, (2) Lower bar rear axle mounts with hardware, (4) Lower bar frame mounts with hardware & (2) Lower coil-over/Shockwave mounts with hardware. Some kits include additional parts, as noted.

Triangulated 4-bar with optional R-Joints
Triangulated 4-bar with optional R-Joints

 Additional Parts & Upgrades, such as R-joints, are listed at the bottom of this page

Universal Kit     Includes long upper bars. Cutting & tapping required

          with Urethane bushings   TRB-U              $459

          with R-joints                     TRB-U-R          $619

 

Chevrolet Cars

1928-32 car/1931-33 truck

          with Urethane bushings   TRB-CA              $459

          with R-joints                     TRB-CA-R          $619

  

1933 Master & Standard car

          with Urethane bushings   TRB-CB              $459

          with R-joints                     TRB-CB-R          $619

  

  1934 Master car

          with Urethane bushings   TRB-CC              $459

          with R-joints                     TRB-CC-R          $619

 

  1934-35 Standard car
          with Urethane bushings   TRB-CD              $459

          with R-joints                     TRB-CD-R          $619

  

   1935 Master car/1936 Standard car

          with Urethane bushings   TRB-CE              $459

          with R-joints                     TRB-CE-R          $619

  

   1936 Master car

          with Urethane bushings   TRB-CF              $459

          with R-joints                     TRB-CF-R          $619

  

*1937-39 car

          with Urethane bushings   TRB-CG              $459

          with R-joints                     TRB-CG-R          $619

          *Recommended (4) 7″ Top Hat Frame re-enforcement plates can be found here

  

*1940-48 car

          with Urethane bushings   TRB-CI              $459

          with R-joints                     TRB-CI-R          $619

          *Recommended (4) 7″ Top Hat Frame re-enforcement plates can be found here

  

*1949-54 car

          with Urethane bushings   TRB-CH              $459

          with R-joints                     TRB-CH-R          $619

          *Recommended (4) 7″ Top Hat Frame re-enforcement plates can be found here

  

   1955-57 car

          with Urethane bushings   TRB-CJ              $459

          with R-joints                     TRB-CJ-R          $619

  

   1953-62 Corvette

          with Urethane bushings   TRB-CV              $459

          with R-joints                     TRB-CV-R          $619

 

 

Chevrolet/G.M.C. Trucks

   1934-36 Truck

          with Urethane bushings   TRB-CTB              $459

          with R-joints                     TRB-CTB-R          $619

  

   1937-40 Truck

          with Urethane bushings   TRB-CTC              $459

          with R-joints                     TRB-CTC-R          $619

  

   1941-46 Truck

          with Urethane bushings   TRB-CTD              $459

          with R-joints                     TRB-CTD-R          $619

  

   1947-55 (1st Ser.) Truck

          with Urethane bushings   TRB-CTE              $459
          with R-joints                     TRB-CTE-R          $619

  

   For 1955 (2nd Ser.) -up Chevy trucks, see our Parallel 4-bar suspensions

Chevrolet 1934-35 Standard Car Triangulated 4-Bar Suspension
TRB-CD shown with additional parts

 

TRB-CV shown with additional parts
TRB-CV shown with additional parts

 

TRB-CTD shown with Ride Tech coil-overs & additional parts
TRB-CTD shown with Ride Tech coil-overs & additional parts

 

TRB-CTB shown with rear sway bar and additional parts
TRB-CTB shown with rear sway bar and additional parts

 

TRB-CTC shown with Ride Tech ShockWaves & additional parts
TRB-CTC shown with Ride Tech ShockWaves & additional parts

Ford Cars & Trucks

          1932 car/1932-33 (1st Ser.) Truck

          with Urethane bushings   TRB-FB              $459

          with R-joints                     TRB-FB-R          $619

  

          1933-34 car/1933 (2nd Ser.)-34 Truck

          with Urethane bushings   TRB-FC              $459

          with R-joints                     TRB-FC-R          $619

  

          1935-40 car/1935-41 Truck

          with Urethane bushings   TRB-FD              $459

          with R-joints                     TRB-FD-R          $619

  

          1941-48 car

          with Urethane bushings   TRB-FE              $459

          with R-joints                     TRB-FE-R          $619

  

           *For 1942-up Ford trucks, see our Parallel 4-bar suspensions

TRB-FD shown with Ride Tech HQ coil-overs and additional parts
TRB-FD shown with Ride Tech HQ coil-overs and additional parts

 

TRB-FE shown with Ride Tech HQ coil-overs, rear sway bar and additional parts

Mercury Cars

          1941-48 Mercury car

          with Urethane bushings   TRB-ME              $459

          with R-joints                     TRB-ME-R          $619

  

Mopar Cars & Trucks

*Note, Specify Wheelbase   

    *1933 Plymouth (108”/112” WB) car/1933-35 (1st Ser.) Dodge Truck

          with Urethane bushings   TRB-PA              $459

          with R-joints                     TRB-PA-R          $619

  

    *1934 Plymouth (108”/114” WB) car

          with Urethane bushings   TRB-PB              $459

          with R-joints                     TRB-PB-R          $619

TRB-PA shown with additional parts
TRB-PA shown with additional parts

Willys Cars & Trucks

          1937-41 car/1937-41 Truck

          with Urethane bushings   TRB-WA              $459

          with R-joints                     TRB-WA-R          $619

 

Additional & Optional Parts

Boxing Plates for C-channel style frame rails can be found here:

Progressive Automotive Rear Sway Bar kit                      PA-RSB-1            $339

Progressive Automotive PA-RSB-1 rear sway bar shown
Progressive Automotive PA-RSB-1 rear sway bar shown

 

Progressive Automotive PA-RSB-1 rear sway bar shown
Progressive Automotive PA-RSB-1 rear sway bar shown

Rear Coil-over/Shockwave Upper mounting crossmember              PA-RCC               $89

*Recommended for Top Hat frames, add (2) 7″ Top Hat Frame re-enforcement plates

  

1955-57 Chevy/1953-62 Corvette Upper Coil-over/Shockwave mounts    TRB-CO-CJCV     $59

  

Ride Tech Coil-Overs

*More information on these can be found on our Ride Tech Coil-over & Shockwave page

             HQ coil-overs, rebound adjustable                        TRB-CO-HQ            $750

             TQ coil-overs, rebound adjustable, dual stage compression           TRB -CO-TQ   $1,930

Ride Tech HQ Coil-overs shown
Ride Tech HQ Coil-overs shown

Ride Tech Shockwaves for Air suspension

*More information on these can be found on our Ride Tech Coil-over & Shockwave page

             HQ ShockWaves, rebound adjustable                        TRB-SKW-HQ            $925

             TQ ShockWaves, rebound adjustable, dual stage compression           TRB -SKW-TQ   $2,150

Ride Tech HQ Rear Shockwaves for air ride shown
Ride Tech HQ Rear Shockwaves for air ride shown

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