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

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.

CHANGE:

The #5 checkball was eliminated and the valve body spacer plate was modified. The manual gear selector and its components have also been modified and paddle shifters have been added to provide manual up and down shift capabilities when the selector is in the “S” position. The shift indicator quadrant without the #5 checkball will have PRNDS. The shift indicator quadrant for the conventional shift pattern is PRND321.

REASON:

With the PRND321 quadrant indicator and with the selector lever placed into the D3 position, the overrun clutch will not apply until the transmission shifts to third gear. When equipped with the PRNDS quadrant indicator, the changes in the spacer plate and the elimination of the #5 checkball will now allow the overrun clutch to apply in first, second and third gears. This not only allows engine braking on coast downshifts.

PARTS AFFECTED

  1. The valve body spacer plate.
  2. The shift selector assembly and its related components.

INTERCHANGEABILITY

None of the manual shift capable parts can interchange with conventional shift system parts.

SERVICE INFORMATION

Figure 1 Is the spacer plate and Valve body checkball locations for the Non-M Shift Corvette.

Figure 1

Figure 2 is the spacer plate used in the Corvette with the Manual Paddle Shift package. Using GM’s Tech Guide numbering, hole 38c was blocked, hole 35c/39 was blocked, the #5 ball is removed, and hole 35a was relocated. These changes blocked the D2 circuit to the 2-3 shift valve and the #5 check ball (38c).

Figure 2

It connected Overrun Clutch feed to the D3 circuit (35a), which was routed through the revised #5 check ball circuit. With the ball eliminated and the D2 hole blocked (35c/39), it forces the Overrun Clutch feed to be metered past the #6 ball passing through the 4-3 sequence valve to apply the clutch. This configuration allows for D3 oil to immediately charge the Overrun Clutch circuit when the M range is selected by the driver for 1st, 2nd and 3rd gears. When a shift into 4th occurs,  Overrun Clutch pressure is exhausted at the 4-3 sequence valve.

See Figure 3 to compare the familiar non-M style hydraulics to the new M design seen in Figure 4.

Figure 3
Figure 4

See figures 5-8 to see all four gears in the M position (Paddle Shift).

Figure 5
Figure 6
Figure 7
Figure 8

You May Also Like

How the Ford engine stop/start system affects transmissions

2018 and later Ford Escape vehicles equipped with a 1.5 L Eco-Boost, 2.0-liter turbocharged engine or the 2L VCTi engines, and the 6F35 transmission, have an engine stop/start system. The stop/start feature can be disabled by the driver and will remain disabled after each key cycle until reactivated by the driver. Some Ford Fusion and

Tech-Talk-May-Figure-1

2018 and later Ford Escape vehicles equipped with a 1.5 L Eco-Boost, 2.0-liter turbocharged engine or the 2L VCTi engines, and the 6F35 transmission, have an engine stop/start system. The stop/start feature can be disabled by the driver and will remain disabled after each key cycle until reactivated by the driver. Some Ford Fusion and Edge models will also have the engine stop/start feature. The reason for this was to improve fuel economy and lower tailpipe emissions.

Ford harsh downshifts: 6R75 2-1, 10R60 7-6

Complaints, causes and corrections for two different Ford transmissions experiencing harsh downshifts.

Tech-Talk-January-Figure-8
Ford 6R140 no engagement cold

The complaint A 2015 Ford F-250 equipped with the 6R140W transmission has just been overhauled. Shortly afterward, the transmission has begun to develop forward and reverse engagement problems when the unit is cold. As it warms up towards operating temperature, the engagement problems diminish and do not return until the next cooldown period. Trouble codes

Tech-Talk-January-Figure-5
Ford 4R70W solenoid codes set

The complaint During the overhaul process of a Ford 4R70W transmission, it was necessary to replace the hard wire frame and case connector. After repairs were completed and the technician prepared to take the vehicle for a road test, the transmission took off in a higher gear and the MIL illuminated. The PCM was scanned

Tech-Talk-January-Figure-4
Dealing with PCM fault codes on the Ford 5R110W

The complaint A 2005 Ford F350 with the 6.0 liter diesel engine and 5R110W transmission has set a P0753 “Pressure Control Solenoid A – Electrical Fault” code and a P2700 “Transmission Friction Element A – Apply Time Out Of Range” code. After a prolonged drive time, DTC P0752 “Pressure Control Solenoid A – Stuck On”

Tech-Talk-January-Figure-2

Other Posts

TransGo introduces new valve body repair kit for GM 8L series

TransGo has introduced a new valve body repair kit for GM 8L45 and 8L90 transmissions, model years 2015 and on. Related Articles – Shop Boss adds new user interface to its shop management software – ATI introduces flexplate and bell kit for Ford 7.3L Godzilla engines with GM transmission – Alto adds torque converter sealing

TransGo-SK_8L90-1400
Ford FNR5 slipping or no reverse hot

The complaint A Ford vehicle equipped with the FNR5 transmission has a complaint of a severe slipping condition in reverse. As the transmission approaches normal operating temperature, reverse movement is non-existent. Related Articles – Volkswagen dual clutch transmission and direct shift gearbox: What you need to know – Diagnostic tips for the Ford 6F35 –

January-Tech-Talk-Figure-1-1400
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).  Related Articles – Park Wiggle Movement (En Español) – Shift Pointers: Park Wiggle Movement – A 10L80

Tech-Talk-Q4-2022-Figure-8-1400
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

Tech-Talk-Q4-2022-Figure-9