This is an improved design BET Performance tool, we actually use our tools and figure out how to make them better.

You are buying a tool that is used to re-size the sealing rings on either a 700R4, 4L60 or 4L60E transmission.

The tool is a improved steel version of the GM Kent-Moore tool, it is very simple to use:

  • Remove the old seals
  • Use our seal expander to expand the seals to the proper ID – or –
  • Expand the new ones over the land, being careful not to over expand it
  • Center the new seals in the groove
  • Lubricate the tool with trans-gel
  • Gently guide the tool over the seal to collapse it into the groove and size it.
  • 100% made in USA

We have changed our design slightly, so your tool may look different than the one pictured.  We also have the seal expander and the pump sizing tool available and will combine shipping on multiple orders.