May 2012 Issue - Transmission Digest

May 2012 Issue

In This Issue Hyundai A4CF2: solenoid codes Nissan/Infiniti RE4F04B: no turbine-speed-sensor reading Nissan/Infiniti RE4F22A: failsafe with DTC P0726

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

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 2.0-liter turbocharged engines. Parts affected include the stator shaft support and the pump body.

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. Related Articles – Is

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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Other Posts

Ford 6R60/6R80 Erratic Temperature Operation

The Complaint A 2013 Ford F-150 equipped with the 6R80 Transmission was overhauled and reinstalled back into the vehicle. On the initial road test, the “trans temp” lamp came on. The truck was equipped with a dash-mounted monitor which was set to engine RPM, vehicle speed, engine coolant temperature and transmission temperature. While driving, the

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Ford 6R60/6R80 Direct Clutch Drum Assembly

The Complaint When rebuilding a Ford 6R60 or 6R80 transmission, the builder is confused by some published material which may show rebuild procedures on one but not the other. The confusion happens when rebuilding the direct drum due to this conflicting information. Related Articles – Sponsored video: GM 6L80 Random Shift Issues – Honda CR-V

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Ford 6R60/6R80 Overdrive Drum and Front Planet Compatibility

The Complaint Soon after overhaul, a Ford 6R60/6R80 Transmission starts to develop a variety of operational issues. A pan drop reveals metal shavings suspended in the fluid. Upon disassembly of the transmission, the overdrive drum and the forward planet exhibit damage to their mating surfaces. Related Articles – KIA A6MF2H Hybrid Engine Stalls in Drive

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Ford FNR5 Setting P0735 After Overhaul

The complaint A 2008 Ford Fusion equipped with the 2.3 liter engine and FNR5 transmission was setting trouble code P0735 after overhaul. The transmission was removed and disassembled for inspection. The direct fifth gear drum was air checked and it was found to be leaking. The drum was replaced and the transmission was reassembled and

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