An Unusual Bind of a Different Kind If you don’t place the
snap ring opening in the proper location during a rebuild the O/D clutches will mechanically lock when you bolt the pump to the case.
ual 3 and manual 1, causing the bind. But it’s not on in manual 2 or the Drive range so it’ll move, even though feels like it’s in a higher gear. In the 2006-and-later model
Figure 4
5R110W, the O/D pressure plate has a raised, stepped area on one side with an extended tab toward one tooth (fig- ure 2). These plates are found mostly in the 5R110W with the PTO setup. When you install the plate in the case, the extended tab is supposed to face the valve body, or the 6 o’clock position (figure 3); flat side up. If you don’t place the snap ring
opening in the proper location during a rebuild (incorrect installation shown in figure 4), the O/D clutches will mechanically lock when you bolt the pump to the case. You can see the clutches through a
small opening in the main case (figure 5). You can check the clutches for free play through this opening with a scribe or thin screwdriver. You should feel noticeable movement in the clutches and steels to verify that they aren’t clamped down. The only reason for this design
Figure 5
usual, everyday grind in the transmis- sion repair business. After a rebuild, the transmission
exhibits an unusual bind in reverse, drive 3, and manual low; manual 2 is working fine. The transmission may feel like it’s taking off in a higher gear than 1st. These symptoms aren’t familiar problems with this transmis- sion. Another look at the original repair order reveals there were no complaints like these before the rebuild: The only complaint was the transmission was
30
slipping. The technician searched for any
technical service bulletins, repair tips, or articles on this particular problem; there weren’t any. It had to be some- thing caused during rebuild: what we refer to as a self-inflicted wound. After taking a close look at the transmission clutch apply chart (figure 1), the one common denominator for a bind in all these ranges would be if the overdrive clutches were staying on all the time. The coast clutch is on in reverse, man-
change that makes sense was to add strength to the pressure plate. Not that I’ve seen or heard of any failure in this area with the earlier, flat-style plate. The early style plate will work fine in place of the later style, and some sup- pliers only stock the earlier plate. If you make this mistake, you’ll
have no choice but to remove the trans- mission from the vehicle and correct it. Of course the vehicle in question will probably be a four wheel drive, which you’ll be finishing late on Friday after- noon and the customer needs to travel out of town the next day. But that’s the nature of the business…
GEARS March 2012
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68