Ford and Mazda share a 4 and 5 speed front wheel drive transmission together. Ford calls the 4 speed a 4F27E while Mazda refers to it as an FN4A-EL. The 5 speed version of this transmission is called by Ford the FNR5 and Mazda the FS5A-EL.

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It’s difficult enough to remember the size of a transmission, but adding transmission manufacturers to the list makes it an even greater task. Let's take a look inside to get more info.

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In this last and final article of this series, we will be looking at the Transmission Adaptive Values Learn. As most know by now, this is a series of tests that are run to allow the transmission control module (TCM) to learn individual clutch characteristics. Click below to read more.

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Inside we will be looking at the Line Pressure Specifications and continuation of A Look at Ford and GM's Jointly Built 6T40 Transmission: Part 2 of 4

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With the exception of the Low and Reverse Clutch, each clutch inside this transmission is operated by a solenoid through its respective regulating valve. 


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Oct. 10, 2002, Ford and GM announced that they would join together to develop a new six-speed front wheel drive automatic transmission. Working on this project together would not only offer a cost-saving factor in its development, they could bring a new transmission to market sooner. 

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In this blog post, we will be examining 6R140 Torqshift 6 valve body differences.

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In 1998, with all AODE/4R70W transmissions, Ford decided to exchange a typical internal wiring harness for a molded circuit board. This affected the construction of the pass through case connector and all the internal solenoids.

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2003-2011 Ford Ranger and 2003-2010 Mazda B-2300 with the 2.3L 4 cylinder interference designed engines and 4R44/5R55 series transmission may incur engine damage after transmission R&R.

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Continued from Part 1 article...

 

One way to determine if the wrong OD planetary ratio has been used is to first erase the Keep Alive Memory with a scanner. Then perform the following relearn procedure:

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Close But No Cigar!

8/7/12 2:49 PM

You may have heard the phrase “Close only counts in horse shoes and hand grenades.” Yet at other times you may have heard “Close but no cigar.” Each of these phrases suggests entirely different outcomes. And such is the case with interchanging overdrive planetary assemblies in 5R55W/S/N series transmissions. When the OD planetary system needs to be replaced, the question that often arises on our technical hotline is: “Are the ratio differences close enough to work?” or “Are the ratio differences between these models significant enough to not work?”

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