Re: Rebuilding my JRX Pro-SE
Posted: Tue Dec 12, 2023 2:26 pm
So I have a XXX buggy I overpaid for that I'm in the process of collecting parts and, in research, I saw there were a number of rare aluminum parts made for it. While finding those for a reasonable amount seems futile at this point, I got the idea to see if there were any for the TLR 22. Turns out there were and so now my Pro SE has aluminum uprights.
There are some problems, though. The aluminum parts were made for the TLR 22 2.0 while I designed my caster block adapters around the 4.0 parts. The compatibility tab on the A-Main site says the 4.0 bag of parts should be for all 22's up to 4.0, though you can see there are differences.
The most impactful difference is the aluminum upright is set further out. I compensated by moving the front axle spacers to the inside to bring the wheel in more, and it's pretty close to the width of the rear tires.
Another issue was the height of the steering arm. The one I had chosen from the 4.0 bag let me get rid of most of the bump steer, but the aluminum piece has different geometry, so I had to remove the shims of the inboard steering ball stud to cut out the bump steer. I might need to tweak it more.
A last problem I found was the small limit stop in the aluminum uprights don't contact the adapter, so you can turn the inside wheel far enough the steering link may toggle and lock up, so when I have time I'll re-spin the adapter to account for this.
An interesting observation about the aluminum upright is that the kingpin hole is threaded, though the kit they came in had a solid pin that was TiNi coated (which I haven't put in, yet). I gather it may be the same as the 22-4 aluminum upright.
Another observation is the upper and lower pivots on this upright are equally sizes and don't allow for as many spacers below the caster block for ride height adjustment, which isn't a concern for me.
There are some problems, though. The aluminum parts were made for the TLR 22 2.0 while I designed my caster block adapters around the 4.0 parts. The compatibility tab on the A-Main site says the 4.0 bag of parts should be for all 22's up to 4.0, though you can see there are differences.
The most impactful difference is the aluminum upright is set further out. I compensated by moving the front axle spacers to the inside to bring the wheel in more, and it's pretty close to the width of the rear tires.
Another issue was the height of the steering arm. The one I had chosen from the 4.0 bag let me get rid of most of the bump steer, but the aluminum piece has different geometry, so I had to remove the shims of the inboard steering ball stud to cut out the bump steer. I might need to tweak it more.
A last problem I found was the small limit stop in the aluminum uprights don't contact the adapter, so you can turn the inside wheel far enough the steering link may toggle and lock up, so when I have time I'll re-spin the adapter to account for this.
An interesting observation about the aluminum upright is that the kingpin hole is threaded, though the kit they came in had a solid pin that was TiNi coated (which I haven't put in, yet). I gather it may be the same as the 22-4 aluminum upright.
Another observation is the upper and lower pivots on this upright are equally sizes and don't allow for as many spacers below the caster block for ride height adjustment, which isn't a concern for me.