C1 Upper Spindle Support

[Thomas H.]

Replacing the upper spindle pivot shaft. Noticed that the new one has less adjustment then the original. Will this be an issue come alignment time?

Tom

[Richard M.]

Re: C1 Upper Spindle Support

Tom, If the right one is the new one.......

IMO......If it's because it has less threads then the left one, it should not be a issue The arm rotates around the threads by design, and as you may see on the left one(if that's the old one), the wear is seen to be far away from the shank where the threads end on both. The camber adjustment is done by rotating the shaft and then locking it up with the pinch bolt. On one end(rear I think) there is a hex, which allows it to be rotated to get the adjustment.

One thing I noticed in the photo, the threads on the left trunion(as I call them), are nice and square. If this is the old one, it appears only slightly worn. The right one(new?) seems sharper. Hopefully the new threaded ends have threads to match. I guess that's why it's important to change everything as a complete package to match.

Actually I like the nice big square threads of the original parts. I recently used reproductions on a '59 myself and they just don't seem as good.

Tom Parsons will hopefully see this and comment. He's a expert on C1 & Chevrolet passenger car systems using this arrangement.

Rich

[Thomas H.]

Re: C1 Upper Spindle Support

Rich,

My main concern was that the original one (on the left) has more adjustment range then the new one.

The original in the picture is in good shape and I was considering reusing it, but the other side is fairly worn so I figured I would replace both.

I just hope when it comes time for alignment that there is enough adjustment........

Tom

[Joe M.]

Re: C1 Upper Spindle Support

The new one does not appear to have as much offset as the old one. Seems like it might be a problem if you need a lot of eccenticity for good alignment.

[Douglas M.]

Re: C1 Upper Spindle Support

The spindle support will hit the edges of slot in the upper control before you run out of adjustment on the threads.

I actually ground a slight bit of the rear of the slot so i could get my car fully into optimal caster and camber.

Doug

[Douglas M.]

Re: C1 Upper Spindle Support

BTW, make sure you install the allen wrench recess towards the front of the car. It makes it easier to adjust and won't confuse the alignment tech as much.

I bought a Fast Trax, (or FastTrax) alignment machine for my car, as I got really tired of having to explain to the 20 year old alignment guys how to adjust the caster and camber. Two 12" by 12" by 1/8" thick teflon sheets under the tires lets the tires easily move on a smooth concrete surface

I can now do it in my garage, and it paid for itself in two alignments, and my alignment is absolutely spot on, much better than I got from any shop, since I took the care to make sure it was right .

Doug

[Tom P.]

Re: C1 Upper Spindle Support

Rich,

My main concern was that the original one (on the left) has more adjustment range then the new one.

The original in the picture is in good shape and I was considering reusing it, but the other side is fairly worn so I figured I would replace both.

I just hope when it comes time for alignment that there is enough adjustment........

Tom

Mmmmmmmmmmmmmm, as it looks to me, the NEW shaft is on the left (thicker, square threads). Furthermore, I do not see any issues with being able to adjust the caster/camber, providing your frontend is in good shape without any damage to the suspension parts.

[Thomas H.]

Re: C1 Upper Spindle Support

Mmmmmmmmmmmmmm, as it looks to me, the NEW shaft is on the left (thicker, square threads). Furthermore, I do not see any issues with being able to adjust the caster/camber, providing your frontend is in good shape without any damage to the suspension parts.

Sorry, I did not identify which was which.

The original shaft is on the LEFT. The new one is on the RIGHT.

Tom

[John H.]

Re: C1 Upper Spindle Support

Sorry, I did not identify which was which.

The original shaft is on the LEFT. The new one is on the RIGHT.

Tom

Tom -

Sure doesn't look like the new shaft eccentric has the same amount of radial offset relative to the shaft centerline (for camber adjustment) as the old one does.

[Thomas H.]

Re: C1 Upper Spindle Support

Tom -

Sure doesn't look like the new shaft eccentric has the same amount of radial offset relative to the shaft centerline (for camber adjustment) as the old one does.

Thus my concern................

Tom

[Patrick S.]

Re: C1 Upper Spindle Support

I am having trouble adjusting the camber on my 62. It looks like I have one of the aftermarket excentrics show in the picture. Where can I get a piece lke the original with more adjustment? Moog or TRW or ??
The top of the wheel will not get to zero camber.

[Cliff P.]

Re: C1 Upper Spindle Support

Wow,

Thank you guy's . Have been restoring a 59. Had replaced everything in front end. Never compared pcs. next to each other. After reading this thread yesterday I went out today and took back apart to see if mine were different and they were. I'm putting the orig. back in they were fine. I'm just glad to catch now and not when body was back on and getting front aligned.