AW4, A340 Deep Transmission Pan For Jeep and Toyota, "No Dipstick" Design
Product In Development, PML Part Number 11076
Status and Availablity: We made prototype parts for test installs. See the Installations below.
We are making more pans for prototype testing in October 2019.
Pricing: $295.00 in natural as cast finish, $375.00 in black powder coat finish
Volume: approximately 1 quart over stock compared to AW4 stock pan Mopar part number 83504037
Number of Bolts: 19
Dimensions: 1 1/4 inches deeper than stock Mopar part number 83504037. Click here for dimensions.
Thanks to those who have emailed us and responded to our questions.
Some models of these vehicles have an AW4 or A340 transmission:
PML AW4, A340 pan has:
The PML design is flexible to to work with several vehicles. We are doing a version for the AW4 first and then will look at other vehicles.
Because different models have different the stock pans and dipstick receiver tubes, we have replaced the dipstick and receiver tube with level check/fill holes on the pan.
This means you would no longer use your dipstick. The transmission fluid level would be checked from pan!
PML No Dipstick Design Details
How to fill: There is a fill/level check hole on the bottom of the pan. You would need to use a pump and fill the transmission through the bottom of the pan. You would fill until the fluid starts to dribble out then put in the fill hole plug.
How to check: To check the fluid, you would remove the plug and see if any fluid dribbles out. If it does, it's full and you're good to go.
How did we come up with these levels? By measuring the dipstick "OK" and "MAX" levels with relation to the flange of the stock pan. Read about PML No Dipstick Design (PDF file).
Any benefits to the PML no dipstick design? Checking the fluid on the pan is less convinient than using a dipstick but there are a couple small benefits:
Email List for PML AW4/A340 Transmission Pan
Stock Pan and Transmission
This PML design is based on the AW4 transmission for a 1987 to 2001 Jeep XJ. Transmission pan is Mopar part number 83504037.
PML pan compared to stock pan:
Filter and Gasket
PML designed this pan to work with the stock gasket and filter.
The filter bolts on to the valve body. No filter extension is needed. The pick up and fluid level is at the same place with the PML pan as with the stock pan.
The A340 (A340E, A340F, A340H) and the AW4 are sister transmissions. The AW4 is commonly found in Jeeps, such as 1987-2001 Cherokees. The A340E, A340F, A340H transmission is found in Toyota cars, trucks and SUVs and a few Mitsubishis, Kias, Lexus cars and SUVs, and Volvos.
There are 9 different stock pans. These 9 stock pans have 4 different depths and 7 different dipstick receiver heights and angles. The dipstick receivers complicate the design and manufacturing. There are 13 different filters and 15 different valve bodies in addition to 9 different pans.
This variety of pans, filters, valve bodies and applications complicates the design and testing. Information and pictures on vehicle configurations are much appreciated!
Dipstick Thoughts (NOT PLANNED BY PML)
It is theoritically possible, not something PML plans to do, to add a dipstick to the side of the pan. There is a thick area on the side of the pan and someone could possibly fabricate an adapter, receiver tube and dipstick.
This is a computer generated picture showing an example of a possible adapter on the side of the pan. This would be expensive and PML does NOT have plans to manufacture this. This is just an idea for folks to consider.
These are pictures of installations of prototype pans. Our thanks to those installations for their feedback.
2000 Cherokee 4.0 XJ
Kurt provided details about his installation (PDF file coming shortly). He noted that he had to pry the stock pan off. After installing the PML pan, he saw fluid temperatures 15 to 20 degrees cooler overall.
Stock transmission pan
PML and stock pan side by side
1998 Cherokee 4.0 XJ
Richard reported that he had to remove the transmission cross member to remove his old pan and install the PML pan. Pumping fluid in gets messy unless the pump has a flexible tube that can bend at the top to prevent fluid from running back out.
1998 Cherokee 4.0
1998 Cherokee Stock Pan
Installing PML AW4 transmission pan on 1998 Cherokee
Aaron installed this PML pan on his 1990 Cherokee XJ Limited 4.0 4WD. His Cherokee has a 4.5 lift, aftermarket high flow exhaust, transmission cooler, and tow package. He was pleased to see lower fluid temperatures with the PML pan installed.
1990 Cherokee XJ
1990 Cherokee stock transmission pan
Transmission on a 1990 Cherokee
1990 Cherokee PML AW4 transmission pan installed, view from driver side
Passenger side view of PML AW4 pan on 1990 Cherokee
Make Your Own Deep Pan
See this write-up by gojeep.willyshotrod.com/HowtoAutoDeepPan.htm who welded his own extra capacity pan from two stock pans. He has some great pictures even if you do want want to make one yourself.
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