Solving the 6R80 Leak Mystery
When the vehicle was inspected on a lift, it appeared to have multiple leaks, but the most prominent leak seemed to be coming from the case connector. A data search found three bulletins related to a leak at the case connector…
4L60-E No move after rebuild
The transmission rebuilder accused the R&R man of breaking the pump during the installation process. The R&R man was certain that he had done his job correctly and that the rebuilder must have done something wrong during the rebuild. To help pinpoint the problem, a pressure gauge was installed into the line-pressure port. To everyone’s surprise, the line pressure was normal. This meant that not only was the pump not broken but also the PR valve was not stuck open. This also meant that the transmission would have to be removed from the vehicle and at least partially disassembled.