Frame twist from extra HP?

[Yumalee]

I have '84 Scrambler. Went the lead-foot route with 383 stroker and T350 tranny. I'm trying to narrow down the cause of a steering issue when I hammer the skinny peddle on pavement. The Jeep will head to one side on get-go and then jump back the other way on let-off. I'm wondering if it's frame twist or bump steer effect because of unloading the weight off the front end with acceleration.

Any experience or information out there? I'm sure there is.

 

[FLCJ8]

Could be due to torque steer, rear locker, or worn motor mount or suspension bushings.
Have not experienced it with my 4.2l

 

[sdsupilot]

Is the Jeep lifted? Does it have stock axles? Do you have a picture of the front end of the Jeep? I would guess it is caused by the angle from your pitman arm to steering link on the passenger side.

 

[Yumalee]

Is the Jeep lifted? Does it have stock axles? Do you have a picture of the front end of the Jeep? I would guess it is caused by the angle from your pitman arm to steering link on the passenger side.

4" lift, Real axles are one-piece. Pitman is extended one that came with lift kit. The tie rod and drag link are nearly parallel with about an inch difference at the Piman location. Don't have pic right now. Thanks for the reply.

 

[spankrjs]

What brand leaf springs?
Are they soft?
Maybe broken rear axle center pin?

 

[mysunnshine]

Mine would rear steer when I had the RE springs on it.

 

[Yumalee]

What brand leaf springs?
Are they soft?
Maybe broken rear axle center pin?

Rough Country bought in 2020. Have about 1000 miles on them. Believe me, they are not soft.

 

[cjwoodman1]

I purchased a set of rough county springs years ago and removed them after just a few months, too stiff for the weight of the jeep. Check your angles, mine never settled in and the jeep rode like trash. .

 

[Yumalee]

I purchased a set of rough county springs years ago and removed them after just a few months, too stiff for the weight of the jeep. Check your angles, mine never settled in and the jeep rode like trash. .

I'm only able to post on pic at a time, I guess. This is rear. Left if front.

 

[Yumalee]

 

[Yumalee]

I have a few projects to clean up on this dude, so I waited until it's 110°-114° outside. I'm inside with a beer right now.

 

[cjwoodman1]

Enjoy that beer! Your angles look much better than mine did so I think my theory of the shackles is off. If you look closely in this older pic you can see my shackles were 90 degrees to the frame, really effected the ride quality. Looks like you have 4" lift, looks great.

 

[Yumalee]

Enjoy that beer! Your angles look much better than mine did so I think my theory of the shackles is off. If you look closely in this older pic you can see my shackles were 90 degrees to the frame, really effected the ride quality. Looks like you have 4" lift, looks great.

Thanks, I like the look and the lift is right size, but they don't call if Rough Country for nothing. However, I do think the stiffness helps keep clearance between tire and body safe. I run the dunes with paddles and hit a hard bounce that pushed the paddle into the fender flare. Chomp-chomp! Thankfully, they are not hard to find and not too much $$.

 

[gpassida]

Good info. The shackle angle really does make a big difference in the ride quality and flex.

Most of you guys aren't SOA but here are some pics of my shackle angles.

The on-road ride of my Scrambler SOA setup with the now unavailable Rubicon Express RE1445 1.5" YJ Springs is really nice. Firm but not bouncy and soaks up bumps great. And they flex great on the trail. I have old "Con-Ferr" shackles in the rear and M.O.R.E. shackles in the front. As you can see, these springs have a reverse eye on the main leaf.

Front:



Rear:


And I was really lucky to have a Rubicon Trail Foundation fund raiser in Sacramento to test out all aspects of the suspension on the MetalCloak CTI Trailer: