+1 didn't need shims or reaming in the arms on my kit.

The original motor mount had 4 holes in it, 2-M3, 2-M4. You will need to find one of those.

TKR5211 ? Motor Mount Insert (aluminum, gun metal anodized) ? Tekno RC, LLC.

To be clear, everyone saw the question was about the shims/washers INSIDE the diff, not on the diff/case right? As far as I'm aware, the shims/washers (TKR5145B) inside the diff are always used. The shims outside of the diff between the bearings and diff case (TKR1222) are to tighten/loosen the diff mesh with the drivetrain (TKR8152)and are indeed optional depending on how tight/loose that fit is after assembly.

i was refering to the shims inside the diff case. the ones over the orange oring.

Yes, I answered about the shims inside the diff that cover the oring. Not the shims for the diffs into the cases. I assume everyone else did not fully read or understand the question.

I have never seen where people have omitted TKR5145B (green circle) in the build, nor does the manual list it as optional. TKR1222 is (red circle).

Picture for 100% clarity as it seems there COULD still be confusion (or it's just me ;) ).

Yes I was referring to the green circled shim. Only reason I ask is when I ran losi we had to sometime leave this shim out because it caused a bind. Not in every diff tho.

ok i want to order some spare parts and some tuning option parts and suggestions? shock springs, sway bars for as far as tuning parts.

Thats about it. I replaced 2 parts since january. Front broken shock shaft and a bent inner hinge pin. The plastics are solid. But this was on the nitro. Also still running the plastic spur.

So after a few days on the track i noticed a fair amount of hub play in all 4 hubs. Also now i cant seem to get the buggy to go in a straight line now due to this issue any one having this problem?

Yes, those are needed, and part of the build.

I have never left that washer out of any TLR kit I have ever built (three 8ights E, two SCTE and a 22-4). It protects the o ring from the spinning pin. I assumed you meant the actual optional shims because the washers you are referring to are never optional...at least for any kit I have built.

I have play compared to when it was new,but nothing i would call excesive. Or cause it not to track straight. Check your pill inserts are matching

Pills are in the right way maybe i just need to check every all the buckles and make sure they mach up in mm.

Make sure your servo saver hasn't backed off and that your servo horn is tight.