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Mechanical Diodes®

This unique design for a one-way clutch assembly known as the "Mechanical Diode®" (MD) was developed by Epilogics, Inc. in 1991 and was first introduced to torque converter rebuilders by Sonnax in 1997. The MD overrunning clutch, or freewheel, offers much greater strength than existing roller-ramps and sprags.

Gm md 4 2

4L80-E, Single Plate Performance Converter

Mechanical Diode® GM-MD-4-2

Fits GM 4L80-E stator support spline and stators with 3.25" bores.

  • Internal Spline Tooth Count: 37
  • Design Strut Count: 10
  • Engagement Strut Count: 2
Gm md 10s

350, 400, 8" Performance Converter, 4L60 Performance Converter, 727 Performance Converter, Powerglide, 350, 400 Performance Converter (Mounting Ring), Powerglide, 350, 400, 10" Performance Converter

Mechanical Diode® GM-MD-10S

Fits stators with 3.25" (82.55mm) bores

  • Material: Steel
  • Internal Spline Tooth Count: 27
  • Design Strut Count: 10
  • Engagement Strut Count: 2
Fd md 2

HP Miscellaneous

Mechanical Diode® FD-MD-2

  • Material: Hardened Steel
  • Internal Spline Tooth Count: 32
  • Design Strut Count: 5
  • Engagement Strut Count: 1
  • Height: 0.750"
  • Outer Dia.: 3.356"
Gmfd md 10s

350, 400, 8" Performance Converter, AOD Performance Converter, C4, 10 or 11" Bolt Circle Dia. Performance Converter, C4, 11" Bolt Circle Dia. Performance Converter, C6 Performance Converter

Mechanical Diode® GMFD-MD-10S

Fits stators with 3.25" bores and Ford 32-tooth stator tube splines.

  • Internal Spline Tooth Count: 32
  • Design Strut Count: 10
  • Engagement Strut Count: 2
Gmfd md 10sb

HP Miscellaneous

Mechanical Diode® GMFD-MD-10SB

Fits stators with 3.25" bores and Ford FMX 29-tooth stator tube splines.

  • Internal Spline Tooth Count: 29
  • Design Strut Count: 10
  • Engagement Strut Count: 2
Ch md 1

904 Performance Converter

Mechanical Diode® CH-MD-1

  • Material: Hardened Steel
  • Internal Spline Tooth Count: 27
Fdgm md 1

HP Miscellaneous

Mechanical Diode® FDGM-MD-1

Fits 10" C4 Aluminum Stators, GM Transmissions, 10" Ford Falcon Stator

  • Internal Spline Tooth Count: 27
  • Design Strut Count: 5
  • Engagement Strut Count: 1
Gm md 9 3

350, 400, 8" Performance Converter, 4L60 Performance Converter, 727 Performance Converter, Powerglide, 350, 400 Performance Converter (Mounting Ring), Powerglide, 350, 400, 10" Performance Converter

Mechanical Diode® GM-MD-9-3

Fits stators with 3.25" (82.55mm) bores

  • Material: Steel
  • Internal Spline Tooth Count: 27
  • Design Strut Count: 9
  • Engagement Strut Count: 3