WTF? Dog Tracking under Accel...
10-07-2010, 12:57 PM
#16
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Year: 1995
Model: Cherokee
Engine: 4.0 I6
Are you positive its coming from the rear though, are you sure its not just the front turning abruptly and it makes you think its coming from the rear?
10-07-2010, 01:07 PM
#17
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Year: 2000
Model: Cherokee
Engine: 4.0
Well Ill put it this way. If i didnt turn the wheel under acceleration, It would drift off the road.
I think were misunderstanding each other here.
I think were misunderstanding each other here.
10-07-2010, 01:26 PM
#21
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Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
If the problem were in the steering components it would do it all the time, not just under acceleration.
When there's something loose on one side of the rear end of a vehicle w/leaf springs, it can allow the rear axle to shift under acceleration becoming cocked in the vehicle making it pull in that direction. For instance: If the left rear spring bushings are shot and allow the axle to move forward on the left but the right remains tight it can cause the rear of the vehicle to move or steer itself to the right. This would need to be compensated for by turning the steering wheel to the right to keep the vehicle headed in a straight direction even though all four tires are following a slightly different path.
That's why you see some vehicles "Dog-tracking" when you're following them.
The rear tires aren't following the front tires. Worn parts, a bent frame, or a mis-aligned axle are the causes of that.
When there's something loose on one side of the rear end of a vehicle w/leaf springs, it can allow the rear axle to shift under acceleration becoming cocked in the vehicle making it pull in that direction. For instance: If the left rear spring bushings are shot and allow the axle to move forward on the left but the right remains tight it can cause the rear of the vehicle to move or steer itself to the right. This would need to be compensated for by turning the steering wheel to the right to keep the vehicle headed in a straight direction even though all four tires are following a slightly different path.
That's why you see some vehicles "Dog-tracking" when you're following them.
The rear tires aren't following the front tires. Worn parts, a bent frame, or a mis-aligned axle are the causes of that.
10-07-2010, 01:28 PM
#22
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Year: 2000
Model: Cherokee
Engine: 4.0
If the problem were in the steering components it would do it all the time, not just under acceleration.
When there's something loose on one side of the rear end of a vehicle w/leaf springs, it can allow the rear axle to shift under acceleration becoming cocked in the vehicle making it pull in that direction. For instance: If the left rear spring bushings are shot and allow the axle to move forward on the left but the right remains tight it can cause the rear of the vehicle to move or steer itself to the right. This would need to be compensated for by turning the steering wheel to the right to keep the vehicle headed in a straight direction even though all four tires are following a slightly different path.
That's why you see some vehicles "Dog-tracking" when you're following them.
The rear tires aren't following the front tires. Worn parts, a bent frame, or a mis-aligned axle are the causes of that.
When there's something loose on one side of the rear end of a vehicle w/leaf springs, it can allow the rear axle to shift under acceleration becoming cocked in the vehicle making it pull in that direction. For instance: If the left rear spring bushings are shot and allow the axle to move forward on the left but the right remains tight it can cause the rear of the vehicle to move or steer itself to the right. This would need to be compensated for by turning the steering wheel to the right to keep the vehicle headed in a straight direction even though all four tires are following a slightly different path.
That's why you see some vehicles "Dog-tracking" when you're following them.
The rear tires aren't following the front tires. Worn parts, a bent frame, or a mis-aligned axle are the causes of that.
THANK YOU!!!
Thats exactly what i think is happening!!!
10-07-2010, 01:37 PM
#23
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Year: 2000
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Engine: 4.0L with throttle body spacer and cold air intake, bored throttle body, #784 injector upgrade
He beat me too it but yeah... also when was the last time you checked your U-bolts on the axle? Had the same problem on my street rod and spent WAY to much money on the steering only to end up doing this 
because my u-bolts had come loose enough to allow the axle to slip sideways. Best of luck.
because my u-bolts had come loose enough to allow the axle to slip sideways. Best of luck.
10-07-2010, 01:48 PM
#24
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Year: 1993
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If you have loose u bolts on a rear axle the torque when accelerating will cause the rear axle to move forward on the side that is loose creating a rear steer condition. It will also move rearward on deceleration or compression braking. ( but they have to be real loose )
Seems like I type to dam slow!!
Seems like I type to dam slow!!
10-07-2010, 02:07 PM
#26
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Year: 1994
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OK...with engine OFF...first get a helper to waggle the steering wheel while you watch the steering gear. ANY play is bad.
Next, lift the front end off the ground, grab the wheel at noon and six and work it. Do the same at nine and three. Any play is bad.
While up there ON FOUR JACKSTANDS check the control arms carefully. PUt a pry bar on them and see if you can get any wiggle. Wiggle bad.
Next, air up all four tires to the same pressure. If you have a locker and your rear tire pressure is off even a few pounds, the diameter of the tire changes and the locker will thrust you sideways.
If none of these yield results, get a .357 mag, stand in front of the car and explain that if it doesn't knock this crap off you're going to put it out of your misery....then you can shoot it or take it to a mechanic, whichever seems best.
Next, lift the front end off the ground, grab the wheel at noon and six and work it. Do the same at nine and three. Any play is bad.
While up there ON FOUR JACKSTANDS check the control arms carefully. PUt a pry bar on them and see if you can get any wiggle. Wiggle bad.
Next, air up all four tires to the same pressure. If you have a locker and your rear tire pressure is off even a few pounds, the diameter of the tire changes and the locker will thrust you sideways.
If none of these yield results, get a .357 mag, stand in front of the car and explain that if it doesn't knock this crap off you're going to put it out of your misery....then you can shoot it or take it to a mechanic, whichever seems best.
10-07-2010, 03:02 PM
#27
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Year: 2004
Model: Grand Cherokee
Engine: 4.7L V8
I'd check the leaf spring's front bushings, the u-bolts, the front spring hanger boxes for rust/damage, and a broken main leaf in those springs. Also if your Jeep's lifted with blocks they can shift causing this.
10-07-2010, 04:58 PM
#28
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Year: 1995
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weird this topic came up, I recently noticed I had the same thing going on...after installing my 31's, I say check everything that was stated (i havnt had time to yet so if you find something post it up, I'm betting ubolts though), and to put it to a fair explanation for arguments sake lol, it's like a torque steer feeling in a fwd car (for those of you familiar with that) but from the rear, and I'm betting the correct diagnosis would be considered "excessive axle wrap" due to worn/loose rear axle components. 
10-07-2010, 05:30 PM
#29
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Year: 1995
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Engine: 4.0 with all of the noise and clatter
Good idea, check all components and connections.
Rear steer only works if it is countering the front steer in unison.
If your idea was actually happening, and the bushing magically disappeared, it wouldnt cause the front to steer either way, you would either a. get a bad shake at all speeds, and/or b. snap the leaf bolt resulting in a fun filled day.
Rear steer only works if it is countering the front steer in unison.
If your idea was actually happening, and the bushing magically disappeared, it wouldnt cause the front to steer either way, you would either a. get a bad shake at all speeds, and/or b. snap the leaf bolt resulting in a fun filled day.
10-07-2010, 08:57 PM
#30
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Year: 1998
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I saw a post somewhere, about a month ago. The bolt that holds the front of the leaf spring through it's eye had sheared off right where it threads into the frame nut. This would be on the other side of the spring eye from where the bolt head is.
I remember it was quite a pain to remove the broken off end from the nut too.
I remember it was quite a pain to remove the broken off end from the nut too.