4L60E, 4L60, TH400 Pump rear ring resizer tool

thingiverse

This is the teflon seal ring compactor tool to compress the rear two pump seals into the stator grooves. There are 2 files provided, the one named PumpCompactor.stl is an actual size tool. The file named RingCompactorOsize.stl is 0.040" oversized on the inside bore dimensions. I needed the oversize file as my printer is actually printing a circle about 0.040" undersized. So up-sizing the tool makes it fit, for me, exact. If you need another minor size change, use your slicer's re-scale to increase diameters. Print with about 25% infill, and I used PLA. I lubed the internal bore with transmission assembly gel, then slid it down over the two rear seals, allowing it to sit for about 15 minutes, then remove the resizer and install the pump assembly.