- Subject: Use of incorrect manual valve
- Unit: U140E
- Vehicle Application: Toyota RAV4
- Essential Reading: Rebuilder, Diagnostician
- Author: Wayne Colonna, ATSG, Transmission Digest Technical Editor
I recently was informed of an interesting scenario by a good acquaintance, Dave Gombash, in Chicago. It concerned a time when he had to replace a U140E valve body in a Toyota RAV 4.
He bought a good experienced (or so he thought) valve body from a hard-parts supplier. After it was installed the transmission had no reverse unless he played with the shifter. When he selected Drive the transmission had a very bad delayed engagement, but if he pulled the selector down one more notch the transmission would engage immediately.
When he removed the valve body and started to compare it with his original valve body, he noticed that the manual valves were different lengths. Since the valve bodies looked identical in every other way, he decided to use his original manual valve in the replacement valve body. When he installed the valve body it worked flawlessly.
This, of course, piqued my attention, as I had not heard of the U140E valve bodies having different-length manual valves. After looking into it, I discovered that all U140Es do indeed have manual valves of the same length. The difference is between the U140E and U150E transmissions, as you can see in figures 1 and 2. The U140E manual valve in Figure 1 has a longer shoulder behind the manual-valve link slot than the U150E manual valve in Figure 2.
Figure 3 is a line drawing of the two valves with dimensions of spool and manual-valve lengths to assist you in recognizing the difference between the two. Apparently what happened to Dave is that he had received a U140E valve body with a U150E manual valve in it from the hard-parts supplier. Another case of mistaken identity!