rear wheel hopping

[ksmitty]

I have a 1987 cutlass 442 with a 1970 olds 350 under the hood. 373 posi unit new to car. When we try to get a good launch off the line the rear wheels will not grab or spin. they bounce up and down and cause the car to shake violently. The engine has a lot of torque, and pushing 300 hp. Any ideas of the problem?

 

[patmckinneyracing]

I occasionally have this problem doing a burnout with my bu. Do you have a sway bar and are the rear lower control arms boxed? A lot of times this will fix most cases of wheel hop.

 

[GuysMonteSS]

I have boxed control arms,anti roll bar & poly bushings,550 + hp,and no wheel hop at all.
Guy

 

[tc1959]

I got it bad now with this set of tires,Didn't have it with the old ones. I could burn them to the rims never hopped.
Bought some new tires from Discount Tire I really don't lIke them.

 

[ksmitty]

old bf Goodrich radial tires, do not know what you mean by boxed control arms, I believe yes for the sway bar. Is that the bar running under the rear end that goes from side to side. the suspension is the way it came from the factory. No changes to it have been made. It drives normal fine and before we installed the posi it spun the one tire for ever if you wanted it to. Is this a suspension problem?

 

[SonOfRDgear]

watch out, i've seen cars do that that end up busting u-joints, or worse, the whole axle.

 

[-83MONTESS-]

watch out, i've seen cars do that that end up busting u-joints, or worse, the whole axle.

x2! I have also heard it referred to as "F-150 hop" because I guess the F-series trucks are, or were, bad for it.

 

[ksmitty]

I know its not good. so how do I stop it from happening

 

[CHRIS.O]

Are you running all stock suspension? Adjustable shocks help, as do boxed control arms like what was already suggested.

Oh ya and the f150 hop, I can vouch for that haha. They hop like a rabbit.

 

[Minion1186]

Its kind of drastic but you could add anti hop bars to the rear. Basically they relocate the center of the rear and plants the tires effectively removing the wheel hop. I have a set on my cutlass with 3.73s and posi. It literally lifts the rear of the car too! I found that you have to make a bracket and move the brake distribution block forward and to the left a bit, possibly bending up new brake lines and removing the upper control arm bushings from the axle housing.