Tech/Talk Archives - Transmission Digest
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

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. The Cause The 6R60 direct drum is assembled differently than the 6R80 drum.

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. The Cause Sometime during the 2008 model year these two

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

Allison 1000/2000 P2 Planetary Carrier Changes

In this edition of Transmission Tech/Talk, Wayne Colonna describes a new design for the Allison 1000/2000 P2 sun gear thrust bearing.

GM 4L65E: The Purpose of Omitting the #5 Ball

Wayne Colonna describes a 4L65E with a modified valve body spacer plate where the #5 checkball was left out.