Transmission TECH/TALK Archives - Transmission Digest

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Dealing with PCM fault codes on the Ford 5R110W

The complaint A 2005 Ford F350 with the 6.0 liter diesel engine and 5R110W transmission has set a P0753 “Pressure Control Solenoid A – Electrical Fault” code and a P2700 “Transmission Friction Element A – Apply Time Out Of Range” code. After a prolonged drive time, DTC P0752 “Pressure Control Solenoid A – Stuck On”

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Ford FNR5 slipping or no reverse hot

The complaint A Ford vehicle equipped with the FNR5 transmission has a complaint of a severe slipping condition in reverse. As the transmission approaches normal operating temperature, reverse movement is non-existent. The cause The case is cracked behind the low reverse clutch apply piston in an obscure area. The crack can be very difficult to

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FCA 62TE missing caged needle bearing

The complaint When the Low Clutch Housing is removed from the Underdrive Center Shaft of a 62TE transmission, one notices that the caged needle bearing located on the shaft between the sealing rings was missing (Figure 1, above).  The cause A running change was made in 2010 where this caged needle bearing was eliminated. When

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FCA 62TE slipping in second and fifth

The complaint Immediately after overhaul, a 2013 Chrysler Town and Country with a 3.6L engine and a 62TE transmission faults to limp mode. The scan tool reveals trouble codes P0732 “Second Gear Ratio Error,” P0735 “Fifth Gear Ratio Error,” P0792 “Compounder Speed Error,” and P1790 “Fault After Shift” are set. During the overhaul procedure, the

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Comparing the pumps on Ford 6F35 generation 1 and 2

The change For the 2013 model year, the Ford 6F35 transmission received a high-volume pump which increased the intake channel in the stator shaft support from 0.432” to 0.520”. The pump body intake channel was also increased to the same matching dimensions. The reason Higher pump volume was required to accommodate the 1.5-, 1.6- and

What to do when a GM 6T40 BAS Hybrid loses line pressure

The complaint After overhaul, a GM vehicle equipped with the 6T40 BAS Hybrid transmission has a complaint of little or no movement. A line pressure check reveals extremely low pressure. The technician disconnected the transmission case connector to see what effect that would have on line pressure, but it was negligible. Cause 1 Once the

Keep an eye out for 6L80/90 defective oil pumps

The complaint After replacing the pump assembly in a 6L80/90 transmission with a new GM pump the vehicle returns with symptoms that would appear to be caused by a low fluid condition: it falls out of gear at a stop and has low line pressure. Upon further inspection the sump filter, which was also a

Avoiding 4L60-E harsh shifts and engagements

The complaint The complaints are harsh engagements and shifts. The scan tool data reveals that there is no amperage command to the EPC solenoid therefor the line pressure is at maximum. There are no transmission codes stored, there are lean codes stored in the ECM. The ABS or the VSC (vehicle stability control) lights may

Fixing 4L60-E 1-2 shift issues

The complaint A 1993 Chevrolet 1500 with the 5.0-liter engine and 4L60E transmission has a complaint of second gear starts. The truck seemed to start off in first gear on an initial cold start but would stay in second gear at a stop or even when shifted out of Drive to Park or Reverse and

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TF80SC Gen 1 2-3 flared shift

The complaint A 2005 Volvo XC90 equipped with the TF80SC Gen 1 transmission has a complaint of a 2-3 flared shift. During the overhaul process a brand-new valve body from the dealer was installed, only to find on the initial road test that a 2-3 flared shift still existed. The adaption procedures were performed but

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Mazda FW6A-EL stored pressure switch codes

The complaint A Mazda with the “Sky Active” FW6A-EL transmission has its Check Engine and A/T Warning lights illuminated, with the following trouble codes stored in TCM memory: P0842 “Oil Pressure Switch #1 (pressure switch B) Stuck On.” P0847 “Oil Pressure Switch #2 (pressure switch A) Stuck On.” P0872 “Oil Pressure Switch #3 (pressure switch

Honda Ridgeline bind up in reverse, forward in neutral

The complaint A 2006 Honda Ridgeline equipped with the BJFA Transmission has a complaint of a bind up in reverse and moves forward in neutral after overhaul. The truck would roll freely with the engine off and the transmission in neutral. Since this complaint occurred after overhaul, the technician thought that a clutch was mechanically

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