Guest Ray Newport Posted January 24, 2003 Share Posted January 24, 2003 I have a shimming problem on my 49 Roady. I get a shimming between 60-65 mph(it does go that fast and will hold it), above 65 no shimming. The front alignment is in specs. The tires are bias ply and are inflated at the proper pressure. I don't have a clue. Any help would be appreciated. Thanks in advance. Link to comment Share on other sites More sharing options...
Bill Stoneberg Posted January 24, 2003 Share Posted January 24, 2003 Have you tried balancing your tires ?Tell the people at the tire store what you are experiencing and they should be able to help you. Besides, thiose cars wern't made to go that fast <img src="http://www.aaca.org/ubbthreads/images/graemlins/smile.gif" alt="" /> Link to comment Share on other sites More sharing options...
Mrbuick714 Posted January 25, 2003 Share Posted January 25, 2003 Find a Buick with the same wheel- bolt pattern that does not 'SHIMMY" Borrow his front wheels and give it a try.Sounds tike tire problem, (balance,out-of-round or both).If you were to try radials,you might want to go that route.I remember wnen I drove a 49 Roadmaster,I could feel those bias-ply tires when I slowed down to a little over 60 MPH. Link to comment Share on other sites More sharing options...
The Old Guy Posted January 26, 2003 Share Posted January 26, 2003 The shimmying problem you are experiencing is a common one. Bias tires are not being made as well as they used to be. I experienced the same problem with my 40 Buick when I installed new tires and found that I had two that were not round. I have driven my 40 over 95,000 miles and knew that something was not right. The problem seemed to get a little worse at 65-70 but my wife complains when I run that fast in the old car, so I had the tires trued,and she doesn't realize I' going that fast anymore. I normally run 70+ on the interstates with my 40 ,so I do not understand why there are so many people that think that they won't go over 60 Link to comment Share on other sites More sharing options...
Guest tin knocker Posted January 26, 2003 Share Posted January 26, 2003 Joe----What is the gear ratio on your 40 and what model is it? Link to comment Share on other sites More sharing options...
The Old Guy Posted January 27, 2003 Share Posted January 27, 2003 My buick is a 1940 model 56C and it originally came with a 4.40 axle. I changed it to the optioal 3.9 back in 74 ,and then found out that the rear axles from 1940 to 1955 were interchangable. I then installed a 3.42 from a 55 Dynaflow ,and it will run all day at 70+ without a problem Link to comment Share on other sites More sharing options...
Guest Ray Newport Posted January 27, 2003 Share Posted January 27, 2003 Thanks to all that responded, i'll try your suggestions. I was also glad to see that i'am not alone in getting my 49 up 70+ mph. After reading some past post saying that you couldn't run at these speeds for very long. Link to comment Share on other sites More sharing options...
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