The GM 8L90 Stop/Start or Go/No-Go
The Stop/Start feature many vehicles are equipped with today is in my opinion one of the most annoying features a vehicle could ever have. Of course, my opinion doesn’t reflect the opinion of others, but what is undeniably annoying is when the stop/start feature is not working correctly, especially when it is self-inflicted. Take, for
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
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
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
A 3D printing solution for 948TE offset pump access
The Chrysler 948TE has an offset pump mounted in a housing that is retained by round internal snap ring that must be squeezed to release the pump from the housing (seen in Figure 1). The difficulty in doing so: there is a double tension plate located at the bottom side of the pump (Figure 2).
6F35: A classic bolt intrusion
I remember the first time I took a phone call from a shop that had a GM 4L60-E with a complaint that it felt like it was bound up in both reverse and drive. I you got into the throttle a bit, it would move but with a terrible noise. After the Park Pawl was
Japanese CVT no-move conditions: Failsafe or defective TCM?
The Japanese Automatic Transmission Company produces a continuously variable transmission (CVT) known as the JF016/17E, which has been fitted behind 2.0L to 3.5L engines worldwide. Here in the United States, there is a light version called the CVT-8LT for 4 cylinder applications (JF016E) and a heavier version called the CVT-8HT for V-6 applications (JF017E). Nissan
Having a fit with a Honda Fit
A Honda Fit utilizing a GTAA continuously variable transmission will set a DTC after reaching about 30 miles per hour. When a scan tool is used to pull the code or codes set, a U0401-68 code appears in the scan tool with the explanation of it being a TCM failure. If a tech uses the
GM 10L80: A new kind of pump noise
How quickly time passes by. The GM 10L80/90 transmissions began production in 2017, meaning that we’re closing in on six years of this transmission being on the road. Many who work in the dealerships have become privy to the immediate failures that occur in this unit. And now, with some of these transmissions coming out
Chrysler 948TE: It’s a doggy dog transmission
The Chrysler 948TE transmission (seen in the above image) stands out for its unique use of two dog clutches: dog clutch A and dog clutch F. Dog clutch A (Figure 1) is used to drive an annulus/sun gear while dog clutch F (Figure 2) is used to hold a double sun gear stationary. In a
What to do when a GM 6T40 BAS Hybrid loses line pressure
After overhaul, a GM vehicle equipped with the 6T40 BAS Hybrid transmission has a complaint of little or no movement.
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
