Here is an inside look at Ford's P310 eCVT Transaxle
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A strategy within the PCM, the “Torque Monitor” looks for certain PCM computer faults as well as monitoring to see if the overall powertrain torque delivered to the drive wheels exceeds what the driver is requesting. There are 3 gross errors the torque monitor is looking for, they are:
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The Ford Escape Hybrid was offered for sale as a 2005 model. At the start of production for the 2006 model year the Mercury mariner was added. At the start of production for the 2008 model year Mazda acquired this same vehicle as the Tribute. The hybrid systems used in all three of these vehicles are identical.
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There is some history that runs between the two countries, even more so when you compare transmissions in vehicles from the different locations.
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After a rebuild, an Audi 01J CVT exhibits a gear ratio error code 17114 only after the transmission has...

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In 2003, a program change in the computer caused the 45RFE (4 speed) to become a 5-45RFE (5 speed). One year later, a running change was made to the 45RFE/5-45RFE solenoid assembly.
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Some Chevrolet Cobalt vehicles equipped with the 2.4L engine (Variable Valve Timing) and the 4T45E transaxle...
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It’s not unusual to see an influx of people heading to the gym to knock off a few extra pounds acquired by holiday festivities. But after a few weeks, the attendance settles back down to the yearlong regulars.
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Is It A Bad Computer?

5/4/17 12:06 PM

What causes problems today might surprise you. Let’s look at a couple of different examples.

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Toyota’s U660E mounted to a V6 engine and the U760/1E with the L4 is a front wheel drive transmission. It utilizes 7 solenoids to achieve 6 forward gears along with flex lock up control.

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When a hydraulic/mechanical fault occurs with one of these solenoids (as mentioned earlier), the diagnostic process begins with checking the operation of the solenoid and its related valve(s).

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Now, rather than having a gear ratio code, a performance code or codes are set for the specific solenoid or solenoids responsible in making the shift change and holding the gear.

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While DTC signal trouble, they do give you a good deal of information on your problem-solving journey.

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A call came in last week on a 2001 Dodge Durango with a 4.7L engine and a 44RE transmission.  The only information given by the technician stated that the indicator light was...

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62TE Cracked Piston

3/13/17 10:24 AM

P076A seems indicates that there is an electrical problem with the Direct Clutch Solenoid Circuit. But when the description of the code given by the manufacturer is carefully read, it could also mean a performance problem may be the cause.

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Ring Repair on a RE5R05A

2/16/17 11:54 AM

The rings on the output shaft of an RE5R05A ride inside a sun gear shaft. 

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For 2012 models, two different PCM’s were used. One manufactured by Keihin and the other by Continental. Software updates are available for both. Software updates were originally available for Keihin PCM’s in 2014 and then for Continental computers mid 2015.

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TCC Trouble

1/16/17 11:05 AM

Companies who rebuild torque converters will tell you the hundreds of times their converters are unjustly blamed for a problem. 

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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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With the cold weather hitting many areas of the country nearing an end, spring time fever outweighs a cold headache anytime. Some things are designed to work well in the cold and some are not, especially when they get old.

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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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Transfer clutch burn out is not uncommon with Subaru transmissions. Normal wear and tear, sealing ring failure or molded piston failure (especially with glycol intrusion) would be a few items on the list.

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The CVT VT20/25E transmission was used in two Saturn vehicles; the 2003 to 2005 Ion and the 2003 to 2004 Vue. Overseas it was used in the 2002-2004 Opel Vectra. 

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GM’s 6L40/50/80 series rear wheel drive transmissions referred to as GM6 may come in to the shop experiencing a complaint of a delayed reverse accompanied with a slipping reverse as well as a flare or slide 2-3 shift. 

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Did you know that Mercedes 722.9 transmission has a two part case?

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A 6-Speed From Korea?

8/8/16 12:14 PM

Hyundai and Kia manufacturers use a front-wheel drive 6-speed transmission in many of their vehicles. This blog post will briefly cover what was written back in a post in 2014 and we will continue it here with a couple of issues that could be encountered. 

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The majority of calls we receive on our technical help line are with vehicles 15 years old and newer. With the complexity of newer vehicles, these calls have become increasingly more difficult to do. Suffice it to say that when a call comes in for a vehicle that is from the ’90s or the early 2000s, it usually becomes a break against the brain bumrners we normally receive. 

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Nixing NAG 1 Problems

6/27/16 10:45 AM

Learn how to tackle some issues you may see with the New Automatic Gearbox Generation One. Click on "Read More" to read the full article.

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In our last blog post we talked about how the solenoid, hydraulic interaction achieves a specific gear and diagnostic tips. We also started off with how the pump is the heartbeat of the transmission. Look inside to read the continuation of this post and its valuable contents inside.

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How solenoid, hydraulic interaction achieves a specific gear and diagnostic tips - inside this article!

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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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It Wasn't Like That Before

3/23/16 9:55 AM

When visiting WiWi’s Transmissions in Miami on a hot Saturday morning, there was a 2007 Dodge Ram 3500 with a 6.7L diesel and an AS68RC transmission (Figure 1) in failsafe along with a serious delayed engagement into reverse. A tech made some checks the night before but didn’t see much and left it for the following day. Because I was there, they asked me to take a look at it.


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Volvo produced a bulletin (Number 83-84) regarding a water leak from the sunroof. The root cause and repair provided in this bulletin is informative and well done. 

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

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Things are heating up in the transmission as technology continues to roll along...

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Besides shift feel, shift scheduling and converter clutch control, the TFT sensor plays a role in a variety of failsafe controls which too is manufacturer dependant.


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Things are heating up in the transmission as technology continues to roll along.
If you have lived life for any reasonable length of time, you have come to learn that technology in general waits for no one...


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There have been numerous cases on our technical hotline where a Ford 500 vehicle came into a shop for repairs requiring the removal of the TF-81SC (AF21) transmission. 

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Audi or BMW vehicles, equipped with the ZF5HP-19/ FL/FLA may exhibit a condition of a firm engagement in the Drive position accompanied with a harsh coast-downshift.  Read more inside...

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Hyundai has been quite forthcoming with providing technical data for its 6-speed transmission — much of which is required should the need arise to diagnose one of them. Click here to read more...

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Ever Have a Difficult to Operate Gear Selector? Of course you have or else you wouldn't be wanting to read this blog post. Click below to see all the info.

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Toyota Tundra, 4Runner, Tacoma, Sequoia and FJ Cruiser equipped with the A750 transmission may exhibit a complaint of multiple transmission solenoid electrical circuit faults set. 

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What Is The VLPS? This is part 3 of 3 and packed with a lot of information.

Ready. Set. Go.

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In our last blog post on the VLPS, we talked about Chrysler introducing this into the 41TE (A604) and 42RLE transmission as early as 2007. Today we will look at the following which is detailed O. E. diagnostic information for each of the following codes...

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Chrysler introduced a Variable Line Pressure Solenoid to the existing 41TE (A604) and 42RLE transmission as early as 2007. The addition of this solenoid includes the use of a transducer to verify line pressure control as feed back to the computer. 41TES and 42RLE-VLP are the new designations for the units equipped with the added solenoid and transducer.

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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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As manufacturing transmission standards change, you must learn how to function without this handy tool...

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When the Dodge 48RE partial engine has a stall or sudden engine rpm increase. What do you do?

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A Look at the CVT-7

10/20/15 11:37 AM

This compact, easy-to-work-on system may change your mind on transmission work.

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A new spacer plate is available for the 6L80 series transmission due to an 8th ball being added to the upper valve body. This ball is in what GM designates as the CBR1 hydraulic circuit.

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The front wheel drive six speed transmission called the 09G used in a variety of Volkswagen vehicles is plagued with shift problems. Particularly shifts that have engine revs in-between shift transitions we call flared shifts. 

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A 2007 Acura MDX 3.7L V6 using a BYFA 5 speed automatic transmission comes in to your shop sporting a DTC P1744. The definition of this code is as follows: Problem in Shift Control System; Shift Valve E Stuck ON. Many transmissions today refer to solenoids as valves and most do not have an actual valve in the valve body identified by just one letter.

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Many years ago I had experienced climbing vertical rocks out in the Capitan Mountains of Tinnie New Mexico. After doing my first top rope climb, I had to rappel down. Well, if you can imagine, as you stand on the edge of a three-story high cliff with rock ledges on the way down and a pile of jagged boulders waiting for you at the bottom, stepping off didn’t seem to be the right thing to do. 

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ATSG frequently receive calls from rebuilders who find the reverse clutch spring retainer snap ring popped out of its groove with RE5R05A transmissions causing reverse clutch failure (figure 1). This is due to several reasons; the snap ring groove in the case is shallow, the snap ring is thin and the spring return is quite stout (figure 2). 

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With many of today’s vehicles, the engine compartment is so jammed packed the battery needs to be relocated to other areas of the car. In some cases their relocation makes access to them difficult. In an effort to provide a reachable battery jump point, a remote jump stud is connected to the positive battery cable. These jump studs can be in close proximity to the vehicles Transmission Control Module (TCM).

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The JF011E (as it is called in Dodge and Jeep applications), is a JATCO-made CVT, which is also referred to as the RE0F10A in Nissan and the F1C1A in Mitsubishi (Figure 1). With this transmission having such a presence on the road today, it comes as no surprise that many shops have chosen to take on repairing this simple transmission.

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After rebuilding a ZF6HP26 transmission, it is frustrating to say the least when you discover harsh, bumpy or clunky type shifts on a road test.

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Aisin AW produced a 5 speed front wheel drive transmission for Volvo, SAAB, GM, Suzuki and Nissan vehicles. 

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One aspect to the repair business is doing work on a car that is on its way to being sold or traded in. Such was the case with a shop that received a 2010 Volkswagen CC 2.0L using the dual clutch direct shift gear box called the DSG 02E transmission. 

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A 2003 Dodge Ram 1500 Quad Cab 4x2 with a 5.7L engine and a 545RFE transmission comes into the shop in failsafe.

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A 2002 Tacoma come into the shop with an intermittent no reverse, second gear starts and no shift to fourth gear.  May or may not store code P0755. In this case the truck was scanned and a DTC P0755 for S2 solenoid performance was stored in memory. The code was recorded, then cleared and did not return even when the reverse and second gear start no fourth gear problem occurred during a road test. 

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The acronym for “continuously variable transmission” is CVT. Amusingly enough; there are many other titles that use the CVT acronym. For those who have not had a good experience trying to repair a CVT might relate to “Center for Victims of Torture.” Perhaps the bad experience provoked the thought of a career change to become a “Certified Veterinary Technician.” If one isn’t so easily discouraged, “Continuing Vocational Training” may be an option. One thing is for sure, although continuously variable transmissions are the transmission of choice for hybrid vehicles, it doesn’t make it a “Current to Voltage Transmitter” or a “Constant Voltage Transformer.” OK, so I am being a bit of a “Chemical Vapor Transport” (full of hot air that is) for this article’s opening paragraph pertaining to CVT transmissions. No doubt that “clear valid training” is needed to diagnose and repair these transmissions as many shops are now beginning to want to make that choice. 

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A 2006 Nissan XTERRA with and RE5R05A transmission was rebuilt a couple of years back when it returned to the shop with a sudden “no move” condition.

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Having an updated and the right comprehensive overview to most effectively determine the problem and what actions to take is very important to have in your transmission business.

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2005 and up G.M. Trucks equipped with the 4L60/65/70E transmission may exhibit a complaint of Torque Converter slip when the vehicle is hot, accompanied by a Diagnostic Trouble Code P0894, Component Slip. This complaint usually occurs after an overhaul and/or after the repair of the TCC Regulator valve bore.

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In our Transmission Tip Tuesday series, Wayne Colonna, gives a good tip on the inside of a ZF8HP45 torque converter out of a Dodge vehicle. Check it out and watch the video inside!

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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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A 2009 BAS (Belted Alternator Starter) equipped vehicle may have a complaint of the engine stop/start system being inactive and the Malfunction Indicator Lamp (MIL) is illuminated.

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During an overhaul of a U140E transmission, it was determined that the original valve body needed replacement. After installation the vehicle had no reverse engagement unless the selector lever was moved around. When drive was selected, a severe delayed engagement was present.

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Wayne Colonna, President of ATSG Automatic Transmission Service Group, explains a P0715/717 code input shaft speed sensor problem within a 2011 Toyota Camry 2.5 Liter Engine which carries a U760 Automatic Transmission.

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The vehicle exhibits shift feel and driveability complaints after the transmission has been overhauled or replaced. There have been several occasions where harsh shifts, shudder shifts and/or sliding shifts is due to a fluid to friction compatibility problem.  If the adapts have been reset, power and ground health has been verified, valve body and solenoids are known to be good, the transmission fluid should be considered if the fluid being used is not O.E. Click on the "read more" link below to get on the inside!


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We have had may folks asking about the FNR5/5NR5 transmission. We decided to write up a short article about this. Click on the "read more" link below to get on the inside!

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