rear cab to frame measurement needed
#1
rear cab to frame measurement needed
Questions on the rear of the cab to frame measurement. I am setting up my rear mount positions and am figuring how high the back of the cab should be. With the cab perpendicular to the frame I have 1 1/4" from the frame to the pinchweld. The rocker panel looks to be in the same plane as the frame at this point but I have been told that the gap may be too much? Anyone have a measurement of this are or a measurement say of the running board to the front of the rocker and back of the rocker? I would think the running board and rocker panel should be parallel.
#4
I hesitate to use mine as a guide, but here's what I found. First off, the two pieces (outer shell and inner) don't align worth a darn along the flange, see pic. The PO was content to let the cab ride on the frame, so my flange is battered there. So I measured to the main part of the cab as shown. Very hard to put a ruler on it and read it, so that's as close as I can get.
BTW the pinchweld isn't flat across the frame, it's scalloped for clearance (even before it took a pounding).
BTW the pinchweld isn't flat across the frame, it's scalloped for clearance (even before it took a pounding).
#5
I hesitate to use mine as a guide, but here's what I found. First off, the two pieces (outer shell and inner) don't align worth a darn along the flange, see pic. The PO was content to let the cab ride on the frame, so my flange is battered there. So I measured to the main part of the cab as shown. Very hard to put a ruler on it and read it, so that's as close as I can get.
BTW the pinchweld isn't flat across the frame, it's scalloped for clearance (even before it took a pounding).
BTW the pinchweld isn't flat across the frame, it's scalloped for clearance (even before it took a pounding).
#6
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#8
Dave,
I just measured mine It is 1/2" +/- .060 from the top of the frame to the bottom of the pinch weld. Another way to say it is that the metal to metal gap is the above measurement . Restored original cab with totally original rear cab corners, original pressed steel "dog bones" with new rubber in all mounts. I did move the trans crossmember back over a foot however that should not have changed the frame width at the mounts
I just measured mine It is 1/2" +/- .060 from the top of the frame to the bottom of the pinch weld. Another way to say it is that the metal to metal gap is the above measurement . Restored original cab with totally original rear cab corners, original pressed steel "dog bones" with new rubber in all mounts. I did move the trans crossmember back over a foot however that should not have changed the frame width at the mounts
#9
Thanks, sounds like I am good to go. I just went out to the shop and set the cab parallel to the running board mounts and am at 7/8" to the body line, same as Ross, and would be around 1/2" or so to the pinch weld as well. At this setting the back of the cab is not perfectly perpendicular to the frame rail but it looks like it isnt supposed to be, bad assumption. I wont be able to get to make the mounts until Monday, but I will set them up with the cab as it is now.
#10
Thanks, sounds like I am good to go. I just went out to the shop and set the cab parallel to the running board mounts and am at 7/8" to the body line, same as Ross, and would be around 1/2" or so to the pinch weld as well. At this setting the back of the cab is not perfectly perpendicular to the frame rail but it looks like it isnt supposed to be, bad assumption. I wont be able to get to make the mounts until Monday, but I will set them up with the cab as it is now.
I leveled the frame, then leveled the cab measured at the floor. I can't tell you in inches but I used a 1'x6' board as a spacer. looked about 5/8 inch from the lowest part (sitting on the board) to the top of the frame. I used adjustable mounts sold by mid-fifty to permanently get that height.
After leveling the cab you should set the running boards to match cab, not the other way around imho.
#11
Running board mounts are fixed in a straight line to the frame, so they should be a good reference point as far as the plane of the frame rails. Setting the rocker to them will keep the cab in the same line, side pictures of finished trucks look like the bottom of the rocker is parallel to the running boards. I will be double checking everything before making the mounts but I would rather be a little low in case I need shims. Hard to go back if I set it too high.
1" finished board should be nominal 3/4".
1" finished board should be nominal 3/4".
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