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98 suburban shakes violently when driving down the freeway!!

Customer Question

my Dad has a 98 chevy suburban,and when driving down the freeway sometimes this truck shakes violently like if the engine and transmission would break apart,my Dad replace the transmission & still doing same thing what could be the problem thanks!!!!!!!!
Submitted: 11 years ago.
Category: General
Expert:  Vickie replied 11 years ago.

Dear elregio,


Has he checked to see if maybe the truck is out of alignment? Sometimes it doesn't take much to knock it out of align. It could also be that your wheels are out of balance. If you haven't already...you might have those checked out.


Thanks

Customer: replied 11 years ago.
Reply to Vickie's Post: Vickie thank you for your time but it seems that the problem comes from the engine,something like a sensor or fuel pump,and is a 99 chevy suburban thanks!!!!!!!!!!!
Expert:  Steve7654 replied 11 years ago.
does the shaking stop when you apply the brakes and slow the vehicle down? does it ever happen sitting still, or only when the vehicle is moving? Is this a violent shaking in the front of the vehicle, that can be felt in the steering wheel?
Customer: replied 11 years ago.
Reply to Steve7654's Post: THE TRUCK SHAKES ONLY AT SPEEDS OF 50 M.P.H. MY DAD ALREADY REPLACED THE MAP SENSOR AND NOTHING ALSO TRANSMISSION WAS REPLACED AND STILL THE SAME CAN YOU PLEASE HELP, ALSO I DROVE MY 89 CHEVY CELEBRITY WITH THE WIRE DISCONECTED FROM THE TRANSMISSION AND IT IS THE TCC SOLENOID ALL I NEED TO KNOW IS I CAN REPLACE IT MYSELF OR I NEED TO TAKE IT TO A SHOP THANKS!!!!!STEVE FOR YOUR HELP
Expert:  Marc replied 11 years ago.



http://autorepair.about.com/cs/doityourself/l/aa011703b.htm


Above is the link to replace your TCC solenoid


A shake at certain speeds is almost always tire balance

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