Hellpp!
 

i got a 72 chevy shortbed pro street truck... ladder bars, coil overs, narrowed 9 inch... the whole nine. for some damn reason when i get on it the ass end shimmys back and forth?? i really need some help on this. the truck didnt do it until the guy before me changed the tires?? but he said he messed with the pinion angle and it got better? but its still really bad. i wanna get it lined out before i take it to the track

Re: Hellpp!
 

Start w/the basics.... Make sure everything is properly fastened in place. Measure to ensure it's square. If both of those items are good, verify the current pinion angle to see where you're at (& if it needs adjusting).

Re: Hellpp!
 

what tires were on it before and what are on it now?do the ladder bars have an adjustment on the bottom tube near the axle.if so,make sure they are adjusted equally to start with.is there multiple mounting holes for the ladder bars on the frame(normally there are 3).check to make sure the are mounted correctly.this might be a shot in the dark but as far as the tires,sidewall thickness between the 2 different tires could be a possibilty.hope this helps.

ken

Re: Hellpp!
 

it had sportsman pro's but now it has sportsman S/R radials the tire size is 31x18 thanks i will check it out

Re: Hellpp!
 

Does it still have a panhard bar on it? I think that's what keeps the rear from having side to side movement, but I'm also not very smart...

Re: Hellpp!
 

yeah its gotta aftermarket one but its a lil loose?? im gonna tighten it and see what that does

Re: Hellpp!
 

check your center to center of front spindle to rear center axle, also check the roll out of your tires using a seamstress tape . another thing could be the shock bottoming out or shock adjustment,or weak spring,good luck,vince.