So I noticed a bunch of cracks in the floor pan where the rear of the passenger seat mounting bracket bolts through the floor. Upon further inspection I noticed that Chrysler in it's infinite wisdom decided to spot weld a small rectangular plate under the cab floor pan but NOT tie it into any of the nearby floor braces. Therefore every time the truck hits a bump, the seat bounces and the floor flexes and eventually cracks.

I decided to do something about it. I made a brace out of a piece of 1/8" plate. I cut the spot welds off of the factory bracket, removed it, welded the brace to the cab floor support braces and floor pan. I welded the factory plate to the new brace using the interior seat mount bracket to properly locate factory bracket. Lastly I welded up the holes and cracks, and ground them flat.

 

In the event I ever get the rig on the road I'd like to see that piece of plate flex! I'll have to find someone big to test it.

 

I took my jump seats out, no one ever sits back there anyway.

 

I'm confused.

My passenger seat of my club cab has the pivot in the front, and the hoop in the rear which catches the seat latch under the seat.

Where is this mount you're describing, Tim ?

 

Maybe I'm the one confused.

 

For clarification I'm talking about the rear mounting bracket of the FRONT passenger seat. I agree with AJ that the jump seats are pretty useless and won't be going back in.


I'll try to fix the original post for better understanding. It made more sense when I posted it last night but less sense now that I've re-read it.

 

Passenger seat mount bracket bolted up to properly locate the mount bracket under the floor.
The area in question is where the 3 holes go across bottom of the plate next to the seat strut mount.

 

Cracks in the floor pan from the sheet metal flexing. Rear mounting area of the front passenger seat mount. This is under the black seat mount bracket.

 

Factory bolt plate for the rear mount of the front passenger seat bracket from under the floor pan. The holes in the corners and middle are there so I can spot weld it to the brace I made.

 

The underside of the floor pan with the factory bolt plate removed. I sanded off the paint and rust in preparation for welding in my brace.

 

Close up of above.

 

My brace welded to existing cab braces on three sides and the floor pan across the top. The two bigger holes aer where the bolts go through the seat bracket, floor pan, and in to weld nuts on the factory bolt plate.

 

My brace and the factory bolt plate all welded up.

 

That should hold up a little better, eh ?

 

That's the plan. Is it easier to understand now?

This was a neat little project but I was actually just procrastinating on doing more rust work on the rear cab mounts/floor yet trying to gain a sense of accomplishment.