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5. Check to make sure mounting plates are 
square and perpendicular to the extension 
plate by measuring dimensions A and B as 
shown in FIG. 26-1. Squareness is acceptable 
when dimensions A and B are within 1/8” of 
each other.
6. Weld RH mounting plate onto vehicle body 
(FIG. 26-1), then weld LH mounting plate onto 
vehicle body.
STEP 3 - POSITION LIFTGATE - Continued
NOTE: Before welding mounting plates to vehicle body, check squareness to make 
sure mounting plates are perpendicular to extension plate.
METHOD 1 - PRE-INSTALL MOUNTING PLATES
 AND EXTENSION PLATE ON VEHICLE - Continued
GO TO STEP 4: BOLT LIFTGATE TO VEHICLE
REAR OF VEHICLE BODY
FIG. 26-1
A
B
1/4”
2-10”
1/4”
1/4” 2-10”
EXTENSION PLATE
RH MOUNTING 
PLATE
LH MOUNTING 
PLATE
VEHICLE
BODY
FLUSH WITH
EXTENSION
PLATE
FLUSH WITH
EXTENSION
PLATE
1/4”
WELD CORNER 
POST & MOUNT-
ING PLATE WHERE 
THEY MEET
2” 2”
WELD BOTH ENDS
1/4”
1/4”
2-5
2-5
WELD CORNER 
POST & MOUNT-
ING PLATE WHERE 
THEY MEET