Rear bumper

[kcustom73]

With the resto/mod I'm doing to my 75 Fj40, I will be building a new rear bumper. The current rear cross member is not reusable so I was thinking of just building one out of square/rectangle tube.

My frame as been boxed in this area and I was thinking of using 2 pieces of angle iron on each side of the frame rail (bolted thru with 3x 1/2" grade 8 bolts and spacers in the frame) to give me a mouting surface for the bumper. Then I would bolt the bumper to the angle iron with 4x 1/2" grade 8 bolts. I would also add 2x frame gusset at a 45deg angle (like stock but beefier) to make sure I would have a stong bumper to tow with.

I will be building my own tire carrier and using the Ipor spindle as my starting point.

So with all of this said... How big of a square/rectangle tube will I need to make my bumper to accomadate all of the above? The frame height is around 4" so that gives me one dimension but how far out would I need to go to accomadate for a tire carrier? What are the dimension for the back of the tub to the original crossmember and how far pass the tub should I be for the tire carrier?

I need to go out and buy the tube in the near future so I can start mounting my new tub to the frame so any help here would be greatly appreaciated.

 

[John Smith]

This thread may help you some. https://forum.ih8mud.com/40-55-series-tech/275867-rear-bumper-replacement-possible.html

 

[kcustom73]

Good info in the link above.

Anybody out there using the Ipor spindle would know how much pass the tub I have to be to build a strong tire carrier (using square tubing) ie 2", 2.5" 3" pass the tub???