Trailing Arm Question

[dhigdon@southerntank]

Trying to decide if I should flip the front trailing arm hangers, is there a great benefit to it?

[1970 CST Short Wide]

Originally Posted by dhigdon@southerntank

Trying to decide if I should flip the front trailing arm hangers, is there a great benefit to it?

I believe it would change your pinion angle which you don’t want

[indymachinist]

Depends it you are lowered or not. Mine are flipped.

[HO455]

Originally Posted by dhigdon@southerntank

Trying to decide if I should flip the front trailing arm hangers, is there a great benefit to it?

Is your truck lowered and if so how much?

[coldrider]

Some good discussion at the here and in the embedded thread linked on post 7

http://67-72chevytrucks.com/vboard/s...d.php?t=439768

[dhigdon@southerntank]

I plan on lowering it 6" in the rear.

[CC69Rat]

Originally Posted by dhigdon@southerntank

I plan on lowering it 6" in the rear.

Yes. If you have access to the brackets (is the bed off now?) It is worth the effort, especially if you're going to replace the TA bushings.

Flipping the brackets will make the truck 'think' its only lowered 2, maybe 3 inches. It also seems to help with lateral geometry and flex. I have personal experience with it and I'd do it again, absolutely.

How do you plan on achieving the 6" drop? All spring, or maybe a combination of drop springs, + a lowering block?

[hewittca]

I think CC69Rat definitely hit the real key point in doing this mod. As for the pinion angle benefit, it could be good or bad depending on your setup. If you only drop a small amount, regaining closer to stock pinion angle is good. On my truck, however, I dropped the rear 11 inches and did the trailing arm bracket flip. I actually had to add pinion shims on my rear to negate the change in pinion angle that the bracket flip gave me. This was because I have a two piece driveshaft and I had to raise the center carrier bearing in order to get my driveshaft angles into spec.

[dhigdon@southerntank]

4" drop springs, 2" blocks

[CC69Rat]

4in spring, 2 in block

I'd add a 3 deg shim a nice double adjustable track bar, shock relocation brackets, clean it good and detail it and drive it like you stole it.

Unless you're going really low (or all spring drop to achieve 6") and/or going to be tracking the truck, auto cross, etc. In my opinion you will be very happy with it without flipping the brackets. Or, if you just want to flip them over, then you can likely get away without the 3 deg shims.

Good call on 4in spring, + 2in block. It will ride much better than a 6in spring. I can elaborate if necessary.