Car pulls on moderate acceleration and off throttle. - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-19-2008, 10:25 PM   #1
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Default Car pulls on moderate acceleration and off throttle.

When I am under moderate throttle, the car wants to pull to the left... randomly, not when I shift necessarily, but when driving it wants to pull to the left and back to the right when I let off the throttle. What gives?

BTW, I had it aligned and NEW tires within 6 months.
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Old 01-19-2008, 11:04 PM   #2
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That'* weird. It sounds like you've got a pull and maybe some torque steer.

Check your tire pressures. Low tires cause a pull and make torque steer worse too. What kind of shape are your motor mounts in?
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Old 01-20-2008, 03:34 AM   #3
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It could be a tire suffering from an internal problem of some sort, just because theyre somewhat new doesnt rule that out.


You might also try jacking up both side and seeing if the wheels spin freely.

Another simple thing to try, just to rule it out, is try driving the car at a slow speed for a little ways after it has been sitting for a bit, slow the car down with the parking brake or just by letting it come to a complete stop, get out quick and see if either side has brakes that are hot...be careful though, because if they are hot, they will burn you.
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Old 01-20-2008, 07:12 AM   #4
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Worn or broken engine/transmission mounts can aggravate torque steer (tendency to pull to one side on acceleration). But whenever a car pulls left or right, the first thing to check is the tires. Start by making sure the pressure is the same left and right. Then swap the left and right tire (one end of the car at a time). If the pull goes the other way, you know you have a bad tire.
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Old 01-20-2008, 01:03 PM   #5
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Which transmission mount? are these known for going out? any difficulty in replacing them?
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Old 01-20-2008, 02:13 PM   #6
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Check all of the engine and transmission mounts by firmly applying the brake with the transmission in low and reverse gear, then increase the engine speed as you watch the engine and transmission. A broken mount will allow the drive train to move much more than normal. Do the same thing with a car with good mounts to see what it should look like. Caution! Don't get too aggressive with this test. The engine pulls very hard on the mounts when this is done and can cause a weak mount to tear completely or break.
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Old 01-20-2008, 04:30 PM   #7
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Where is the transmission mount located? is it the one on the drivers side front? or is there another?
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Old 01-21-2008, 02:13 AM   #8
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There is a front transaxle mount located near the joint between the transaxle and engine, a rear transaxle mount on the driver'* side, and a rear torque strut mount (dogbone) on the passenger side. In addition, there is a solid brace that binds the long transaxle housing on the passenger side to the engine block, and finally a torque axis mount on the front (passenger end) of the engine.
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Old 01-27-2008, 10:30 PM   #9
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Default FIXED

Broken front transmission mount! Motor would rock 6-8 inches!! wow. Thanks!
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