Lynx II, hull # 4225

[Andrew Rowe]

Hi Peter, have you had a chance to check the king pins with the shims, and also the bush that goes through the chassis for the sector shaft extension shaft, is that in good condition?,. Not looking up the book , but I think the King Pins should have a certain amount of resistance , which you can determine with a "Fish Scale" , and that will tell you how many foot pounds of pull is required to move your front hub back and forth, hence the correct preload on those King Pins ,
Cheers Andrew

[Harry Moon]

after a number of years with no issues I too had a shimmy when last driven in August. Checked things over and the only issue I could see that needed rectifying was the output bearing on the transfercase front axle output. It was noticeably loose so I took it out and replaced it. Haven't done more than a few kilometres on it so don 't know if that cured it.

[Phil Waterman]

Hi Guys

When chasing shimmy don't forget tire pressure, I've spent days chasing out all the play in the front end of CMPs sometimes with no luck. Then for laughs tried changing front tire pressure. Started at the low end then took them up 5 psi at a time and the shimmy started changing found a pressure where the shimmy only occurred well above comfortable driving speed for that truck.

Cheers Phil

[Hanno Spoelstra]

Further to the comments above, also read Chevrolet C60s - Front Wheel "shimmy"

[Bob Carriere]

It was the truck tire shop that told me to play with the tire pressure and rotate tires. After exhausting all the finer adjustments ni COMPLIED.

Now I am using the 10.50 x 16 and after some Tire rotation and reduction from 50 to 35 pounds all around the shimmy went away....... and the lower pressure gives a better ride.....

The old rules about checking up on loose bolts is valid....... after two years of driving the Spring check up turned up two rear axle U bolts loose....a quick fix but how does it happen?????



Cheers

[Peter Duggan]

Guys,

Gerry bought the LH inner spacer for the front wheel bearing which had 11 thousands machined off and the steering wheel which had the addition of a set screw opposite to the loose keyway.

A couple of test runs had the Lynx tracking as it should and NO desire to develop a shimmy after tackling multiple bumps at speed. It appears that there were multiple issues. In summary, alignment, loose LH wheel bearing, sloppy steering wheel, and what I consider the most significant was the loosened U bolts on the front axle.

After the sense of relief following some great runs, the Lynx decided to give me a dose of reality by locking up in fourth gear.

C'est la vie, Peter

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[rob love]

The lynx here will let you sneak out of a gear and then put in another gear like reverse. It will lock up the transmission. I find one just has to be very robotic and careful on the shifts, keeping the shifter in 90 degree movements as opposed to jaywalking it through the gate.