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Transmission shifting
- Thread starter 2TurboRanger
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2TurboRanger
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- Jack
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- Dec 14, 2025
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- Location
- Oakley, Comiefornia
- Vehicle(s)
- 21 Ranger XLT 2.3 2x4 Wife Mine 24 Ranger Lariat 2.7 4x4
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- Retired Mechanic
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- #17
This is the 3rd time I reset adaptive learning and it's ok for a while
RangerBill
Well-Known Member
In Drive mode, it is normal to skip gears, unless under hard acceleration. It was designed to shift that way.
RangerBill
Well-Known Member
From the shop manual:
System Operation
The 10R80 transmission is a 10-speed, step ratio rear wheel drive transmission that is controlled by a PCM for gas engine applications or a TCM for diesel engine applications. The 10R80 has ten forward speeds, one reverse speed, four planetary gear sets, one mechanical One-Way Clutch or OWC, six friction clutches, an upper valve body, a lower valve body with eight solenoids, and PCM or TCM controlled electronics. The 10R80 utilizes six shift (A-F) solenoids that are linear force solenoids. Unlike previous shift solenoids they are mechanical in nature in that no transmission fluid passes through them. CIDAS s use a armature/pin assembly that moves a control valve in the main control valve body to control and apply hydraulic fluid pressure. Each clutch (A-F) is controlled by a corresponding shift solenoid (A-F). These solenoids are directly proportional in that zero current equals zero pressure and maximum current equals maximum pressure. If the power circuit to the transmission solenoids fails open, then all solenoids are failed electrically OFF, none of the clutch packs are able to engage and there is no fail safe operation.
Upshift Gear Sequence
At times the 10-speed transmission may skip gears when the vehicle starts from a complete stop. This is normal and desired behavior .
At part pedal when acceleration is brisk, single step upshifts would result in very frequent shift events (very short time in gear). Double step upshifts results when a longer time is spent in gear.
However, at light pedal or road load, single step upshifts will occur. The small 10-speed gear steps allow the engine speed to drop to lower values than it would in the 6-speed transmission; providing for the best fuel economy. In contrast, when the 10-speed transmission is at heavy or max pedal, the small steps keep the engine closer to the horsepower peak for best performance.
Down shift Gear Sequence
At times the 10-speed transmission may skip gears when the vehicle down shifts to a complete stop. This is normal and desired behavior .
The same skip shift strategy that is used for the upshift may be applied during down shift.
System Operation
The 10R80 transmission is a 10-speed, step ratio rear wheel drive transmission that is controlled by a PCM for gas engine applications or a TCM for diesel engine applications. The 10R80 has ten forward speeds, one reverse speed, four planetary gear sets, one mechanical One-Way Clutch or OWC, six friction clutches, an upper valve body, a lower valve body with eight solenoids, and PCM or TCM controlled electronics. The 10R80 utilizes six shift (A-F) solenoids that are linear force solenoids. Unlike previous shift solenoids they are mechanical in nature in that no transmission fluid passes through them. CIDAS s use a armature/pin assembly that moves a control valve in the main control valve body to control and apply hydraulic fluid pressure. Each clutch (A-F) is controlled by a corresponding shift solenoid (A-F). These solenoids are directly proportional in that zero current equals zero pressure and maximum current equals maximum pressure. If the power circuit to the transmission solenoids fails open, then all solenoids are failed electrically OFF, none of the clutch packs are able to engage and there is no fail safe operation.
Upshift Gear Sequence
At times the 10-speed transmission may skip gears when the vehicle starts from a complete stop. This is normal and desired behavior .
At part pedal when acceleration is brisk, single step upshifts would result in very frequent shift events (very short time in gear). Double step upshifts results when a longer time is spent in gear.
However, at light pedal or road load, single step upshifts will occur. The small 10-speed gear steps allow the engine speed to drop to lower values than it would in the 6-speed transmission; providing for the best fuel economy. In contrast, when the 10-speed transmission is at heavy or max pedal, the small steps keep the engine closer to the horsepower peak for best performance.
Down shift Gear Sequence
At times the 10-speed transmission may skip gears when the vehicle down shifts to a complete stop. This is normal and desired behavior .
The same skip shift strategy that is used for the upshift may be applied during down shift.
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