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Automatic Transmission

Where Do They Go?

The RC4A-EL transmission, also known as the JR405E, is used in the States in the Mazda RX8 vehicle. It has a much broader use overseas. Since this is not a transmission that shows up on the bench regularly here, when a shop gets one we usually receive a call for help on placing the three tension springs shown in Figure 1.

Wayne Colonna
By Wayne Colonna
Published:
Where Do They Go? Shift Pointers Subject: Placement of tension springs in 2-4 brake assembly Unit: RC4A-EL (JR405E) Vehicle Application: Mazda RX8 Essential Reading: Rebuilder, Diagnostician Author: Wayne Colonna, ATSG, Transmission Digest Technical Editor

Shift Pointers

  • Subject: Placement of tension springs in 2-4 brake assembly
  • Unit: RC4A-EL (JR405E)
  • Vehicle Application: Mazda RX8
  • Essential Reading: Rebuilder, Diagnostician
  • Author: Wayne Colonna, ATSG, Transmission Digest Technical Editor

The RC4A-EL transmission, also known as the JR405E, is used in the States in the Mazda RX8 vehicle. It has a much broader use overseas. Since this is not a transmission that shows up on the bench regularly here, when a shop gets one we usually receive a call for help on placing the three tension springs shown in Figure 1.

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The springs are placed into the case at the location of the 2-4 brake assembly. They go in the 1, 4 and 9 o’clock positions in the grooves where the steel plates align. These positions are easy to locate, as the basic spring design is embossed into the case, identifying their location (Figure 2).

It is easiest to first place the 2-4 brake assembly into the case, then slide these three tension springs into place with the open side against the case. Then install the last friction plate, selective backing plate and cushion plate.

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