E153 Transmission Cooler

Wilhelm Raceworks transmission cooler kit for E153

Tracking a car generates a lot of heat, and one area where cooling is often neglected is the transmission.  MR2 endurance racers have found that keeping transmission temperatures under control is critical to transmission life, and I have personally seen transmission temperatures as high as 250°F (121°C) at a track day, prompting me to develop a small cooler solution for the e153 transmission.  A laser cut sheet metal bracket bolts to three existing locations on the transmission and holds a narrow 10 row Earl's Ultrapro oil cooler, to be fed air by the stock plastic under panel scoop in front of the transmission. 

With the cooler installed temps dropped to 227°F (108°C) under similar conditions to where I had previously seen 250°F. Note that I had also added a diffuser and transmission under panel which cut off most of the natural cooling to the transmission.

Wilhelm Raceworks transmission cooler bracket

Available as either a complete kit including the Earl's cooler and PTFE -6 AN hoses custom made by Technafit, or just the bracket and hardware kit for those who want to DIY.  This bracket could also be used to mount a small engine oil cooler for those who don't want to give up their stock side mount intercooler location.  The kit is designed to use the Earls UltraPro oil cooler PN 210ERL.  For those looking to DIY the lines, the transmission requires an M14x1.5 adapter.

SKU E153 Transmission Cooler
In Stock

The cooler and lines increase the fluid capacity of the transmission by approximately 6oz.  A typical transmission drain / fill should still be less than 4 US quarts.  However, I do recommend spinning the back wheel a few times while filling to pump fluid into the cooler to ensure that the final fill level is correct.

Wilhelm Raceworks transmission cooler Wilhelm Raceworks transmission cooler


Wilhelm Raceworks transmission cooler installed Wilhelm Raceworks transmission cooler installed



  1. Wednesday, 29 June 2022 14:32
    Like the look of your E153 transmission cooler kit.
    Do you ship out to the United Kingdom??
    Hope to hear from you.
    Nick 👍👍
    1. Tuesday, 02 August 2022 10:18
      Hi Nick.  I do ship to the UK, no problem :)
  2. Sunday, 23 October 2022 01:43

    Hello. Looks very nice!

    Will this also fit the E50F transmission on the Gen1 Celica Alltrac?

    1. Sunday, 23 October 2022 09:11

      That I don't know for sure, I'm not familiar with that transmission.

    2. Saturday, 05 November 2022 23:52

      I bought the Kit, and it does fit the E50F transmission in the Gen1 Celica Alltrac perfectly. However, the -6AN fittings that go directly into the transmission that came with the kit were too big. I had to buy some Earl's 1/2-20 I.F. To -6An Male, Extended fittings instead. Worked Perfectly. This is a very high quality Kit!

  3. Saturday, 14 January 2023 22:10

    Alex, the hardware kit…. Does it come with everything except the cooler core?

    1. Sunday, 15 January 2023 07:35

      Everything except the cooler and the plumbing.

  4. Sunday, 02 April 2023 04:02

    Hi, good, would it be valid for the gearbox of the mr2 sw20 atmospheric 2.0 16v of 156cv?

    1. Friday, 14 April 2023 16:22

      Am I understanding correctly that you are asking about use with the 3SGE (no turbo)?  If so, no.  Only turbo MR2's used the E153 transmission, non-turbos would not have the ports to hook this up or the internal oil pump to push oil through it.

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