To avoid the end of TC-PDT001-1 (diff. screw) from touching PO-DT0006-1 (Dog Bone C Drive) in Step 15 when
using smaller rear toe-in or larger camber angles, reduce the number of TC-PDT004-1 (Diff. Cone Washer) to 4
pcs or use our optional 44.5mm universal bone.
Building Tips:
- Make sure you sand the diff rings really good. The rings in the kit are far from being truly flat. Use like a 200 then
go up to 400 grit getting the rings as flat as they can be. You'll see what I mean when you start sanding. It takes a
little bit on each ring to get it right. (schreff post 1365)
- The Photon diff is super smooth out of the box, so keeping it this is a priority. Here’s what I do to keep it this way:
•-Build the diff as normal: sand the rings with fine grit sandpaper, liberally coat the thrust in Associated
black grease, and use a good quality diff lube on the balls themselves. I use ceramic balls and I will use a
ceramic 1pc thrust when one eventually becomes available.
•Tighten the diff and run it in, then readjust the tightness. I run diff in by holding one wheel and holding
one wheel and holding half throttle for 30 seconds.
•Stretch some heat shrink over the outdrive to cover the adjustment hole
•Plug the hole above the screw/thrust with some foam or similar – Tamiya shock foam bushings are a
perfect fit.
•Smear grease on the outdrive under where the diff cover joins to catch any grit that makes its past the
cover. (craigm)
- We left the thin 12×0.3 mm shims on the outdrives off as to achieve a small amount of axial play between the
differential outdrives and the bearings (Step 05). Also the triangle shaped slots in the differential gear hold extra
ball grease. This is a nice idea and seems to work but we advise not to use too much grease as otherwise things can
become a bit messy. After our first run the rear differential felt a bit gritty. Maybe it slipped a bit under
acceleration. We disassembled it, polished the diff rings with WD40 and very fine grit wet & dry paper and
reassembled it. After this treatment the differential felt smooth and consistent for the rest of the day. (Quantum
Mechanics review)
- The kit came with 9 thrust balls but only 8 are required. ONLY USE 8. (stiltskin 4491)
