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Chrysler 300 - AGAIN with the "crown sensitive" crutch/gambit!

18 messages,  Last post on Sep 15, 2009 at 3:33 PM

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#15 of 18 crown sensitivity & things by brit5 Sep 23, 2008 (8:31 am)
There are two issues here.   First issue is the incorrect jigging of a number of early C300's. This is a genuine manufacturing flaw & it is partly corrected by the offset bolt bandaid. Depepending on the magnitude of the jigging error, the offset bolts may or may not correct the problem, but the chassis fault itself cannot be fixed.   Second issue is crown sensitivity. This results from a deliberate design feature that is intended to give the front tires more "bite" in cornering & provide reduced understeer and sharp steering response that is normally completely absent in large heavy cars with long wheelbases. The front end geometry is similar in concept to that seen on a road grader -- the front wheels lean into the turn as they are deflected right or left. This greatly reduces lateral tire slip and sharpens steering response. It also introduces a pronounced crown sensitivity -- it is neither a manufacturing nor a design flaw and cannot be removed.   It is there for sure on a crowned road, but takes only a little steering pressure to correct, and on flat roads it is absent. I quite like the sharp response -- the car has amazing right-left transitional response & tracking despite its 4,000 lb weight, slow steering ratio and 120 in wheelbase. My 300C is enormously more agile than my 300M ever dreamed of being.   Chargers have exactly the same geometry & have identical steering response.   Some folks don't like it -- so be it. I'll keep mine, thank you very much Replies to this message: smithed (Sep 25, 2008 10:20 am) brit5 (Oct 03, 2008 6:15 am) pipex (Sep 15, 2009 3:33 pm)
#16 of 18 Re: crown sensitivity & things [brit5] by smithed Sep 25, 2008 (10:20 am)
Replying to: brit5 (Sep 23, 2008 8:31 am) Can you describe what the incorrect "jigging" actually means?   Certainly my 2006 300C seems to run straight on flat surfaces (and like a scalded dog, as is said), and has some sensitivity to a crowned road, but only if I think about it. Replies to this message: brit5 (Oct 03, 2008 6:15 am) pipex (Sep 15, 2009 3:33 pm)
#17 of 18 Re: crown sensitivity & things [smithed] by brit5 Oct 03, 2008 (6:15 am)
Replying to: smithed (Sep 25, 2008 10:20 am) In this case jigging refers to the positioning of chasis components for welding and other assembly operations. The incorrectly aligned chasis assemblies had front suspension attachment points so far out of spec that there was insufficient alignment travel to make the vehicles run straight. Some cars could be more or less satisfactorily fixed by using offset bolts that increased alignment travel. Others were beyond remediation. Replies to this message: pipex (Sep 15, 2009 3:33 pm)
#18 of 18 Re: crown sensitivity & things [brit5] by pipex Sep 15, 2009 (3:33 pm)
Replying to: brit5 (Oct 03, 2008 6:15 am) There is a TSB for "pull to the right" problem   You have to move the "rack" and resecure it with new bolts.   I found the TSB myself and brought it in to the dealer. Wheel alignment guy said he had never been shown thyat TSB before. He proceeded to do mine and we road tested the car. I now have 62,000 miles on it and it;s still steers perfect.   After the first wheel alignment and nothing had changed, the dumbazz Service Manager told me that they were made to pull to the right so that in case of a medical emergence the car wouldn't drift into oncoming traffic. I informed him that he had a mental problem and should see a psychiatrist ASAP. lol

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