Rear crossmeber for coil over, weld in or bolt in? And.... Panhard or sway bar? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 02-20-2008, 06:17 PM
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Rear crossmeber for coil over, weld in or bolt in? And.... Panhard or sway bar?

I''ve boxed the frame on my '36 Ford PU, have the lower bars of the tri-4 in, and want to locate my rear crossmeber for the coil overs shocks I just got.

I have a piece of 1.5 x 3 (3/16th wall) box tubing for the rear X-member, I thought of making a plate and welding to the tubing then bolting it in (just for flex purposes), but then figured that since the IFS crossmember is all welded in, should I just weld in the crossmember and be done with it?

Also, I got to looking at things, what's the harm of running a panhard bar to keep the axle stable, vs. a sway bar for stability? I realize panhard bards are normally used for regular 4-links, but why not for a triangulated one? I'm not worried about "canyon carving" handling, just a nice commute-type ride in town and on the highway.

Thanks.

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Old 02-20-2008, 07:12 PM
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I would weld in the cross member,If you go triangulated you will not need a pan hard bar,When set up right.
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Old 02-20-2008, 07:32 PM
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Pan hard bar does the same as a triangulated 4 bar, keeps the rear end centered under the vehicle.

The sway bar, if I understand it correctly, is for preventing either side of the vehicle from dipping down heavily on the side during hard cornering. Panhard and sway bar serve two different purposes.

I would personally weld in the crossmember.

Got any pics of the truck? I'm still gathering parts for my '35

later - Karl
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Old 02-21-2008, 07:40 AM
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Good point on the sway bar, I think you're right....I'll have to start putting that in "The Plan".

I'll get some pics eventually, right now I'm down to th chassis and have parts spread out in a few different areas, once I get the rear Xmember in I can clean things up in the shop so I can flip the frame and do some welds on the bottom of the brackets...and have things cleared up enough for pics.

Only thing my cab needs is rockers (and full interior), front fenders, hood and grille are ready for paint, need to do some work on the bed and a little on the rear fenders.

Depending on timing, I'll either start on the my running boards, or I'll be ready for when Bob Drake has the steel repro's out. He has them (RB's) listed for 850 a pair on his site and "coming soon"....a lot of money for sure but will save me a week or two working on mine.
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Old 02-21-2008, 08:08 AM
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Everyone is steering you right
Make the end plate that the c member welds to as long as you can stand . I would not make it any less than 10" or 12" long. You want to spread the load out a fair distance on the frame rails.
You could even box the frame all the way to your x member. That would make your frame nice and stiff.
Don't use a panhard bar with a triangulated 4 bar...not only is it not needed, it will bind up the suspension.

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Old 02-21-2008, 08:11 AM
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Good point Mikey!!!
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Old 02-21-2008, 09:06 AM
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Thanks

I have the frame boxed all the way back with 3/16th, so I should be good to go just welding the x-member to the boxing plate then?

Understood about the panhard...I can see it in my mind now.
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Old 02-21-2008, 09:17 AM
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Just weld it to the boxing plate.

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Old 02-21-2008, 09:22 AM
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Awesome.

Time to gather up the levels and fire up the Mig.

Thanks!
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Old 02-21-2008, 11:20 AM
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Still like to see pics though, doesn't matter if it's not pretty yet!
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Old 02-29-2008, 06:38 PM
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Gonna try to attempt a pic or two...

I got the Coilovers (used) set in and finished up the Tri-bar...best be know that I built pretty much this whole chassis setup from asking some questions here as well as searching HR forum, I think it'll work okay for what I want...no dragging, just a cruiser...hope to get to putting in the reast of the Heidts frontend under it so I can mock up the engine mounts and placement...a few more crossmebers (tranny and one more) and engine mounts and I'll have a solid roller...

Oh, yeah..except for wheels and tires
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Old 02-29-2008, 06:41 PM
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Oh, I might add...

Only reason I thought I'd show you the ***-end pic...was because I'll only be running about 220-240 HP...I'm sure you'll never see it otherwise
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Old 02-29-2008, 06:46 PM
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While I'm at it, and my pics are showing up...

Here's some of the frame and the Heidt's SR2 crossmemebr installed...hope to find some time to miock things up the weekend to get the ride heigth set in with the engine and tranny placed...I dunno though, kids eat a lot of your time

PS..camera angle skews the pics badly, she's pretty straight, about an 1/8th of an inch in all measurements, so should sit level enough and not dog walk down the road
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Old 02-29-2008, 06:49 PM
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Looking good!!!!!
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Old 02-29-2008, 07:01 PM
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Thank you!

Slow-lay, but Sure-lay, I've had this truck in my Dad's shop since the mid-60's, it's nice to finally see things move along
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