Do the Ford C4 and C5 transmissions use the same pan shape?

Yes, the chart shows a single pan gasket outline labeled for both the C4 and C5.

How do I tell a C6 pan from other Ford automatic pans?

The C6 gasket outline shown is larger and has a distinctive stepped/notched cutout in one corner, unlike the more rectangular or square pans of the other transmissions.

Which transmissions are covered in this identification chart?

The C6, FMX (Small-Case Cruise-O-Matic), Medium-Case Cruise-O-Matic, C4, C5, and C3 Ford three-speed automatics.

Home/ Registry/ Ford/ Bronco/ 1987-1991/ “Eddie Bauer”/ Photo supermotors.net/registry/media/898035

Ford Three-Speed Automatic Transmission Pan Gasket ID Chart - C3 C4 C5 C6 FMX

Identification chart of three-speed Ford automatic transmission pan shapes

‹ ›

Identification chart showing oil-pan outline shapes for three-speed Ford automatic transmissions (C6, FMX, C4, C5, C3).

AI caption December 2011 · Photo 923 of 1799

This document is a pan gasket identification chart titled "Three-Speed Ford Automatics." It shows the outlines of five different transmission oil pan gaskets, each labeled with the transmission it belongs to, allowing a reader to identify which Ford three-speed automatic transmission is in a vehicle by comparing the shape of the pan or pan gasket. The five gasket outlines shown are: the C6 (a large gasket with a distinctive notched/stepped corner), the FMX Small-Case Cruise-O-Matic (a rectangular gasket with rounded corners), the Medium-Case Cruise-O-Matic (a rectangular gasket), the C4/C5 (a roughly square gasket, with the same pan shape shared by both transmissions), and the C3 (a square gasket with a small protrusion on one side). Each outline includes the approximate bolt hole locations around the perimeter of the gasket. A reader can use this chart to visually match a transmission pan removed from a Ford vehicle to determine whether it is a C3, C4, C5, C6, FMX, or Cruise-O-Matic three-speed automatic transmission. The document contains no year ranges, part numbers, torque specifications, or other text beyond the transmission identification labels.

Is this accurate? Sign in to help verify it.

Frequently asked questions

How can I identify which Ford three-speed automatic transmission I have?: By comparing your transmission pan or pan gasket shape to the outlines shown: C6, FMX Small-Case Cruise-O-Matic, Medium-Case Cruise-O-Matic, C4/C5, and C3 each have distinct pan gasket shapes.
Do the Ford C4 and C5 transmissions use the same pan shape?: Yes, the chart shows a single pan gasket outline labeled for both the C4 and C5.
How do I tell a C6 pan from other Ford automatic pans?: The C6 gasket outline shown is larger and has a distinctive stepped/notched cutout in one corner, unlike the more rectangular or square pans of the other transmissions.
Which transmissions are covered in this identification chart?: The C6, FMX (Small-Case Cruise-O-Matic), Medium-Case Cruise-O-Matic, C4, C5, and C3 Ford three-speed automatics.