adding Trac bar with drop shackles?

[Chevy1925]

My experience was a little different. 10K on my Dmax street rod last year and the double heim panhard was hammered out.QA1 heims. Going to a poly bushing this year to hopefully make it last.

thats part of the issue. what size heim? i know of others who have that same issue as you with qa1 heims on both street and desert trucks. FK is where its at.

go with derlin if at all possible. no grease needed, next to no flex, and will way out last poly.

 

[zf>allison]

So derlin is a kind of rubber bushing?

 

[Chevy1925]

No, it is its own compound. It's like a hard plastic that has rubber attributes. It is not good for points that need some give like the normal axle wrap bars you see but in spots you need no twisting movement and only rotational, it is ideal.

 

[Turbo Performance]

thats part of the issue. what size heim? i know of others who have that same issue as you with qa1 heims on both street and desert trucks. FK is where its at.

go with derlin if at all possible. no grease needed, next to no flex, and will way out last poly.

1/2". Good to know. I was operating on the assumption that a QA1 heim was decent stuff.

 

[Chevy1925]

They are ok but there is better stuff. And a 1/2" heim is small as hell for what your asking it to do. The surface area a 1/2" heim ball has on the race is tiny compared to a 3/4" or 7/8". That really didn't help you either. Just stepping up in size would greatly improve longevity even if you stayed with QA1 stuff. It's like using the bearings/spindle out of a 3500lbs trailer axle on a trailer that weights 10k with a single axle. Those bearing a burn up fast cause they can not distribute the load well enough

 

[Turbo Performance]

They are ok but there is better stuff. And a 1/2" heim is small as hell for what your asking it to do. The surface area a 1/2" heim ball has on the race is tiny compared to a 3/4" or 7/8". That really didn't help you either. Just stepping up in size would greatly improve longevity even if you stayed with QA1 stuff. It's like using the bearings/spindle out of a 3500lbs trailer axle on a trailer that weights 10k with a single axle. Those bearing a burn up fast cause they can not distribute the load well enough

I get that going bigger would help it last longer but we're still talking about a pretty light street rod not a full size truck. 1/2" seems to be pretty standard for heims in panhard setups for this setup from what I saw. Either way, thanks for the advice on the heim quality, I'll go to some better stuff this time around.

 

[zf>allison]

I might just do big heims of good quality. See how I like it first. I don't mind squeaking you would understand if you heard my dual disc lol noise doesn't bother me. I think it would be easier to do that than something with bushings

 

[Chevy1925]

I get that going bigger would help it last longer but we're still talking about a pretty light street rod not a full size truck. 1/2" seems to be pretty standard for heims in panhard setups for this setup from what I saw. Either way, thanks for the advice on the heim quality, I'll go to some better stuff this time around.

It may be just what I'm accustom to seeing but at no point would I run 1/2" heims as a track bar on the rear end of the truck you built. I have a 1500lbs sand car that ran them on the front a arms and it worried the heck out of me. Wound up going 5/8" stuff till I build different arms. I'm surprised at some of the stuff people run on a street rig and it works.

You might look to see if for some reason the suspension is keeping a constant left or right load on the bar even when sitting still at ride height, that won't help at all.

 

[bfmine]

Look into currie "Johnny joints"