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Beccarain · 06-03-2005, 07:40 PM

The patient: My 2001 Jimmy, 2WD, 4.3 liter engine, auto trans, 47k miles, purchased new a little over four years ago.

Symptoms: At speeds between 60 and 70 mph, there is a shimmy in the steering wheel and whole truck seems to vibrate, most noticable at 65 mph, smooths out at about 75 mph. Problem is consistent on three different freeways including an area of rubberized asphalt.

Patient history and actions taken:

She (her name is Jen) started pulling a bit in January. I had the alignment done at Big-O, problem got worse, Big-O realigned and swapped tires, and tires were blamed. Purchased new set of good tires at Discount. Took Jen on a roadtrip to California and no problems noticed (speeds 75+), but since then mostly surface street driving. About 3 weks ago noticed shimmy between 60 and 70 mph but smooths out at higher speeds. Discount rebalanced wheels, no fix. Took her back to Discount, found left rear tire was out of round, replaced with new tire. Symptoms slightly improved but no fix. The third time, found left front could not be balanced even with 180 rotation on wheel so replaced with new and road force test done on all tires. Now, Jen has two new tires on front and two tires with about 2700 miles on rear. And still no fix. Assistant manager at Discount says they've done what they can do and suggested possible problem with shocks, but that doesn't make sense to me since problem is isolated to limited speed range.

I understand more about cars and trucks in general than many women but would like to be better informed about possible causes before I have her checked out. I will greatly appreciate any suggestions of possible causes.

Many thanks!

06-03-2005, 07:40 PM	#1 (permalink)
Beccarain Upright Location: Right here, right now	Shimmy in my Jimmy, need guidance please The patient: My 2001 Jimmy, 2WD, 4.3 liter engine, auto trans, 47k miles, purchased new a little over four years ago. Symptoms: At speeds between 60 and 70 mph, there is a shimmy in the steering wheel and whole truck seems to vibrate, most noticable at 65 mph, smooths out at about 75 mph. Problem is consistent on three different freeways including an area of rubberized asphalt. Patient history and actions taken: She (her name is Jen) started pulling a bit in January. I had the alignment done at Big-O, problem got worse, Big-O realigned and swapped tires, and tires were blamed. Purchased new set of good tires at Discount. Took Jen on a roadtrip to California and no problems noticed (speeds 75+), but since then mostly surface street driving. About 3 weks ago noticed shimmy between 60 and 70 mph but smooths out at higher speeds. Discount rebalanced wheels, no fix. Took her back to Discount, found left rear tire was out of round, replaced with new tire. Symptoms slightly improved but no fix. The third time, found left front could not be balanced even with 180 rotation on wheel so replaced with new and road force test done on all tires. Now, Jen has two new tires on front and two tires with about 2700 miles on rear. And still no fix. Assistant manager at Discount says they've done what they can do and suggested possible problem with shocks, but that doesn't make sense to me since problem is isolated to limited speed range. I understand more about cars and trucks in general than many women but would like to be better informed about possible causes before I have her checked out. I will greatly appreciate any suggestions of possible causes. Many thanks! __________________ Onward, through the fog . . .