Back to you about colder temps...
I was in Portland Maine this week, down to -1F in the morning. Steering was tight, but not to bad, not as tight as it was the week before. Thursday morning in Bangor it was 5F, steering was only slightly noticablly tighter than the norm. This morning it was -25C ( about -5F), steering was tight again, but it seems to be getting better with each cold morning, perhaps by spring it will be fine

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If indeed the bushing contracts as a whole when cold, then I'm thinking the only solution is to know how much it contracts and machine it to fit for the lowest temp. expected. Hopefully this will not allow it to be to slack in warmer temps.
anyone else have other thoughts ???????
Hi RD:
Thanks for your reflections on temperature effects on the steering column bushing upgrade.
You're quite correct, the Delrin does contract about . 002 with extreme cold.
My upgrade bushing one was installed in June at 100 + degrees, and driven some thousands of miles since then, so it had time to 'wear in'.
I've driven in now at down to 8 deg F and it was ever so slighly tighter, if at all.
What we now suggest is that when you put in the bushing, if you feel any significant resistance to turning the steering wheel, go ahead and pull it out and use very fine sandpaper to lightly (very lighly) ream or smooth out the ID until the resistance is eliminated.
The problem we're up against, is that the inner steering shaft on our truck's column is not made from precision round stock, but roll formed - and thus the diameters do vary by a few thousandths.
We make the bushing to fit the middle 'range' of tolerance, with a slightly tight fit being preferrable as you can lightly cut away - with the 'sandpaper ream' method - to your ideal tolerance.
Our clear & concise instructions also advise several times to check on the tightness (or looseness) of fit before finalizing the rebuild & test driving.
We thought of making it of bronze or alloy material, but that would seem to be even more unforgiving than the more pliable Delrin --- and thus might create fit issues that more vexing.
Also, Delrin is proven to be extremely wear resistant, so much so that it should last many, many years.
Wear rate may depend upon how much grit & grime where one drives.
So, I appreciate your (& others) sharing their experiences and hope my reply can be of help !
Pleaes PM me if you or any others have any questions.
Best Regards,
DBazley