38 Plymouth rear body mounting detail

[westaus29]

I am about to mount the body of my 7 passenger back on the chassis temporarily so that I can properly align the trunk floor replacement panel, but have struck a problem which I hope someone can help with, as it should be common to the 5 passenger sedan. Suggestions would be appreciated as if I dont get it right it will affect the rear alignment quite a bit.

 

I have new rubber and fixings for all the other mounting points and have worked out where they go, all except for the mountings just behind the rear seat. I may be short of rubber for these as have had to guess what extra I needed for the 7 passenger.

 

I have a photo of that area just after the body came off and there are two studs visible in that location which I have circled in the photo below. It looks like there is a rubber pad on each between the chassis and the body. I cant recall if there were also rubber pads inside the chassis rails as well but I feel they are needed there as the threaded part of the studs is quite long so something is needed (see below). The studs also stick up a long way which makes me think there should be more rubber pads inside the body

 

 

I am pretty sure I have found the studs and I have 2 Steele rubber pads 40-0230-48 and two pads 40-231-48 (the pad with a neck) left over. A photo of these bits is below.

 

 

I have already used a couple of sets of these pads on the third row of mountings from the front of the body, see photo below, but that is a simpler setup with a bolt thru it. The neck on the 40-231-48 fits into a hole in the chassis.

 

 

I have added a final pic of the area waiting for a solution. The hole for the stud in the chassis is smaller than the one for the "third" mounting so it doesnt match the "neck" on the 40-231-48

 

[Sharps40]

Just looked at my 37 dodge 4 door hump back.  D5.  5 passenger.  All original mounts.   Same location on mine as yours. 

 

1.  Simple bolt.   Head inside frame.  Nut inside trunk.

 

2.  Bolt goes thru the left and right lower legs of the x brace between trunk and rear seat back. 

 

3.  Stacking is in this order from head in frame to nut in trunk.

 

A.  Bolt up thru top of frame rail

 

B.  A rubber doughnut over bolt shank and resting on top of frame

 

C. Body sitting on top of doughnut 

 

D. Rubber doughnut over bolt shank inside trunk and resting on the floor/foot of the rear seat x member

 

E. Big steel washer,  1/8 or more thick over bolt and on top of the trunk doughnut 

 

F. Nut pulling the washer down to secure the assembly.  

 

Simple set up.  Basic hardware.  

 

Luck

[westaus29]

Thanks Sharps40, that makes a lot of sense and is enough to get me sorted. I still think the studs came from there but there isnt room in the frame rail to install and tighten a nut and the rail is quite narrow at that point and cant fit the standard donut in there. I have made a small rubber donut from a shock absorber rubber, held it on with a thick washer, tightened a nut onto it and installed it from below, then the rest is as you described. I agree a bolt would work fine.

[Sharps40]

Good.  Hard to see inside the frame rail access window but by feel I'm positive its a bolt head not the bottom of a stud with nuts on both ends.