11921 Slauson Ave.  Santa Fe Springs, CA.  90670  (800) 227-4116  FAX (888) 771-7713
20
STEP 2 - WELD LIFTGATE TO VEHICLE
NOTE: GPTWR Liftgates are equipped with mounting plates installed at the 
factory. Mounting plate widths are shown based upon truck or trailer 
frame widths.  Ensure you have the correct mounting plate kit for your 
application.
BOLT ON MOUNTING PLATES FOR INSTALLATION ON TRUCKS &TRAILERS
(REAR VIEW OF LIFTGATE)
FIG. 20-1
If it’s necessary to unbolt mounting plates from main frame (FIG 20-1), torque 
mounting plate nuts and bolts 220-240 lb-ft (GPTWR-25/GPTWR-3) or 350-375 
lb-ft (GPTWR-4/GPTWR-5).
RH 
PLATE
LH 
PLATE
“D” INSIDE 
“D” OUTSIDE
BOLT & 
LOCK NUT 
(6 PLACES)
BOLT & 
LOCK NUT 
(6 PLACES)
TABLE 20-1
LIFTGATE MODEL “D” INSIDE “D” OUTSIDE APPLICATION
GPTWR-25/GPTWR-3
34-1/4” 35-1/4” Common truck chassis width
32-1/4” 33-1/4” Trailer applications
34-7/8” 35-13/16” Trailer applications (91 cm)
TABLE 20-2
LIFTGATE MODEL “D” INSIDE “D” OUTSIDE APPLICATION
GPTWR-4/GPTWR-5
34-1/4” 35-1/4” Common truck chassis width
34-7/8” 35-13/16” Trailer applications (91 cm)
39” 40” Trailer applications