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Old 12-29-2008, 01:40 AM   #1
nuke1
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Join Date: Jun 2007
Location: Saskatoon, Saskatchewan,:
Posts: 2,901
Adjustable rear trailing arms how-to

ADJUSTABLE REAR TRAILING ARMS HOW-TO
MODS move if needed

I thought i would give a how-to on this. everyone on here has been very inspirational and helping of others. so here is something from me. I wanted to build adjustable trailing arms for a few reasons. i can alter the wheelbase, alignment is easier, and i added ballistic joints that are teflon lined for uninhibited wheel travel in the rear, there is no compression of a bushing. Well on to the build, if there are questions ask away, i will answer to the best of my knowledge, and please forgive me if i made a mistake.

Anyways, the first thing i did was lay down some white poster board on my bench, i taped it down so it would not move. I then traced out the original trailing arm for the angle and pivot points. once i did this i marked out my tubing i was using (2"x3"x3/16") and found where my new angle will be located.
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Once i marked out what and where my new trailing arms would be i proceeded to find the existing angle of the old trailing arms. i then used this angle to determine the pie cut i would need to kick up the rear of the arms. Sorry i did not show a pic of the angle finder.
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What i did now was to take a rachet tie down and squish the two ends together until my desried anlgle was acheived. Once it was acheived i then tack welded in two spots on the top of the cut so it did not move, do not fully weld up yet. and make sure that the arm is still square.
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i then cut the other arm with the same pie cut. once that is done i used the tie down againg to bring that one together, once it is i used C-clamps to clamp them together to make sure that they were the same angle. once this was done i tack welded the outsides of the arms. Then i removed the clamps and tack welded the inside of the arms, all the while making sure they are straight. once this is done i fully welded them up. at the same time, i made a boxing plate for the end of the arm and welded it in too.
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__________________
James
1968 GMC "HAVOC"
1986 GMC "Frank"
J.J.R.H. Design & Consulting

My 68`Rebuild "HAVOC": http://67-72chevytrucks.com/vboard/s...d.php?t=316300
A 58' chev build thread: http://www.67-72chevytrucks.com/vboa...d.php?t=311238
1969 Camaro Pro Touring http://67-72chevytrucks.com/vboard/s...61#post3513361
Swiss Cheese: http://67-72chevytrucks.com/vboard/s...d.php?t=384390
Adjustable Trailing Arm How-To: http://67-72chevytrucks.com/vboard/s...d.php?t=321100
1968 Ford Farm Truck: http://67-72chevytrucks.com/vboard/s...=1#post6555587
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