News

C4 Shift Solenoid Symptoms: Why Your Ford C4 Has No Shift Solenoid and What Really Controls Its Shifts
C4 Shift Solenoid Symptoms: Why Your Ford C4 Has No Shift Solenoid and What Really Controls Its Shifts
Looking for a bad shift solenoid on a Ford C4? The C4 is fully hydraulic and has none. Here is how the modulator, governor, kickdown and valve body cause those... Read more...
C4 Overheating Causes and Fixes: Why Your Ford C4 Runs Hot and How to Cool It Down
C4 Overheating Causes and Fixes: Why Your Ford C4 Runs Hot and How to Cool It Down
Ford C4 smelling burnt or blowing fluid out the vent? Prove cooler flow first, check the pump cooler check balls, then the converter and bands. Here is how to find... Read more...
C4 Delayed Engagement Causes: Why Your Ford C4 Is Slow to Go Into Drive
C4 Delayed Engagement Causes: Why Your Ford C4 Is Slow to Go Into Drive
Ford C4 slow to go into Drive, especially on a cold morning? Here are the real causes, from hardened forward clutch seals to a weak pump, how to test line... Read more...
C4 No Movement in Drive: Why Your Ford C4 Won't Move Forward and How to Fix It
C4 No Movement in Drive: Why Your Ford C4 Won't Move Forward and How to Fix It
Ford C4 won't move in Drive but Reverse works, or nothing moves at all? Here is how the forward clutch works, how to check fluid, linkage, converter seating and line... Read more...
C4 Shudder Fix: Why Your Ford C4 Shudders Pulling Away and How to Stop It
C4 Shudder Fix: Why Your Ford C4 Shudders Pulling Away and How to Stop It
Ford C4 shudders pulling away from a stop, especially when hot? Rule out idle, misfires and driveline first, then check the torque converter, forward clutch, sprag and bands. Here is... Read more...
C4 Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
C4 Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
Ford C4 stuck in first and winding up without an upshift? The governor, 1-2 shift valve and intermediate band are the usual suspects. Here is how to diagnose it and... Read more...
C4 Harsh 1-2 Shift Fix: Why Your Ford C4 Bangs Into Second and How to Soften It
C4 Harsh 1-2 Shift Fix: Why Your Ford C4 Bangs Into Second and How to Soften It
Ford C4 slamming into second? The 1-2 shift applies the intermediate band, and line pressure from the vacuum modulator sets how hard. Here is how to diagnose it and which... Read more...
C4 No Reverse: Causes, Diagnosis, and the Fix for a Ford C4 That Won't Back Up
C4 No Reverse: Causes, Diagnosis, and the Fix for a Ford C4 That Won't Back Up
Ford C4 drives forward but has no reverse? Reverse uses the low/reverse band and the reverse-high clutch. Here is how to adjust the band, pressure-test reverse, and which servo, band... Read more...
C4 Slipping in Overdrive: What Is Really Slipping in a Ford C4's Top Gear
C4 Slipping in Overdrive: What Is Really Slipping in a Ford C4's Top Gear
The Ford C4 is a three-speed with a 1:1 direct top gear and no overdrive. Here is what slips in third, how to diagnose it from fluid to modulator to... Read more...
C4 Stuck in Limp Mode: Causes and Fixes for a Ford C4 Stuck in One Gear
C4 Stuck in Limp Mode: Causes and Fixes for a Ford C4 Stuck in One Gear
The Ford C4 has no computer, so it cannot go into a true limp mode. Here is what really holds a C4 in one gear, from the D2 shifter position... Read more...
C4 Won't Shift Into 3rd Gear: Causes, Diagnosis, and the Fix
C4 Won't Shift Into 3rd Gear: Causes, Diagnosis, and the Fix
Ford C4 stuck in second with no 3rd gear? Here is how the vacuum modulator, valve body and high/reverse clutch pack control the 2-3 shift, how to find the fault,... Read more...
C6 Won't Downshift: Causes, Diagnosis, and the Fix
C6 Won't Downshift: Causes, Diagnosis, and the Fix
Ford C6 stays in third at a stop or won't kick down to pass? Here is how the governor, modulator and kickdown control C6 downshifts, how to find the fault,... Read more...
C6 Shift Solenoid Symptoms: Why the Ford C6 Has No Shift Solenoids and What Fails Instead
C6 Shift Solenoid Symptoms: Why the Ford C6 Has No Shift Solenoids and What Fails Instead
Looking for a bad C6 shift solenoid? The Ford C6 is fully hydraulic and has none. Here is what controls its shifts, how to test the governor, modulator and kickdown,... Read more...
C6 Overheating: Causes and Fixes for a Hot Ford C6 Transmission
C6 Overheating: Causes and Fixes for a Hot Ford C6 Transmission
A Ford C6 that runs hot under load usually has a fluid, cooler line or cooling-capacity problem before anything internal. Here is the order to check them and the parts... Read more...
C6 Delayed Engagement: Causes, Diagnosis, and the Fix
C6 Delayed Engagement: Causes, Diagnosis, and the Fix
A Ford C6 that hesitates before going into Drive or Reverse usually has hardened forward clutch seals, low pump volume or low line pressure. Here is how to tell which... Read more...
C6 No Movement in Drive: Causes, Diagnosis, and the Fix
C6 No Movement in Drive: Causes, Diagnosis, and the Fix
A Ford C6 that won't move in Drive has a fluid, linkage, pump, forward clutch or one-way clutch problem. A simple selector test tells you which one. Read more...
C6 Shudder Fix: What Causes a Ford C6 to Shudder and How to Cure It
C6 Shudder Fix: What Causes a Ford C6 to Shudder and How to Cure It
The Ford C6 has no lockup converter, so a shudder comes from somewhere else: a worn boost valve, a damaged direct clutch, or driveline angles. Here is how to tell... Read more...
C6 Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
C6 Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
A Ford C6 that stays in first usually has a stuck governor, a hung 1-2 shift valve, or a second-gear servo and band problem. Here is how to find which... Read more...
C6 Harsh 1-2 Shift: Causes, Diagnosis, and the Fix
C6 Harsh 1-2 Shift: Causes, Diagnosis, and the Fix
A Ford C6 that slams into second usually has a vacuum, line pressure, or valve body problem. Here is how to test each one and which parts fix it. Read more...
C6 No Reverse: Causes, Diagnosis, and the Fix
C6 No Reverse: Causes, Diagnosis, and the Fix
A Ford C6 with no reverse has lost one of the two clutches reverse needs, or the valve body is not feeding them. Here is how to find which one... Read more...
C6 Slipping in Overdrive (High Gear): Causes, Diagnosis, and the Fix
C6 Slipping in Overdrive (High Gear): Causes, Diagnosis, and the Fix
The Ford C6 has no overdrive, so a top-gear slip is really a third-gear slip. Here is what holds third, how to test it, and which parts fix it. Read more...
C6 Stuck in Limp Mode: Causes and Fixes for a C6 That Won't Shift
C6 Stuck in Limp Mode: Causes and Fixes for a C6 That Won't Shift
The Ford C6 has no computer and no true limp mode. When it sticks in one gear, the cause is the governor, vacuum modulator or valve body. Here is how... Read more...
C6 Won't Shift Into 3rd Gear: Causes, Diagnosis, and the Fix
C6 Won't Shift Into 3rd Gear: Causes, Diagnosis, and the Fix
A Ford C6 stuck in second usually has a direct clutch or valve body problem. Here is how to pressure test, air test, and pick the right fix. Read more...
10R80 Won't Downshift: Causes, Diagnosis, and the Fix
10R80 Won't Downshift: Causes, Diagnosis, and the Fix
Ford 10R80 holding a high gear, no kickdown, or late harsh downshifts? Learn how to check codes, software, solenoid strategy and the valve body in Ford's own repair order. Read more...
10R80 Shift Solenoid Symptoms: How to Diagnose a Bad Solenoid or Solenoid Strategy
10R80 Shift Solenoid Symptoms: How to Diagnose a Bad Solenoid or Solenoid Strategy
Harsh shifts, a bind on one gear change or solenoid codes on a Ford 10R80? Learn how the A-F, LPC and TCC solenoids work, why band numbers and the solenoid... Read more...
10R80 Overheating: Causes and Fixes
10R80 Overheating: Causes and Fixes
Ford 10R80 running hot or venting fluid? Check engine cooling, fluid level at 206-215F, the coolant control valve and bypass, then the TCC regulator valve in the valve body. Read more...
10R80 Delayed Engagement: Causes, Diagnosis, and the Fix
10R80 Delayed Engagement: Causes, Diagnosis, and the Fix
Ford 10R80 slow to engage Drive or Reverse? Follow Ford's TSB 24-2101 diagnosis order: codes, solenoid strategy reprogram, valve body, then the CDF clutch cylinder. Read more...
10R80 No Movement in Drive: Causes, Diagnosis, and the Fix
10R80 No Movement in Drive: Causes, Diagnosis, and the Fix
A Ford 10R80 that will not move in Drive is usually low fluid, a pump with no pressure, or a first-gear clutch that is not clamping. Here is the test... Read more...
10R80 Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
10R80 Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
A Ford 10R80 needs the C clutch to leave 1st gear. Here is how to read the C and E clutch codes, rule out sensors and software, and decide between... Read more...
10R80 Harsh 1-2 Shift: How to Find the Cause and Fix It
10R80 Harsh 1-2 Shift: How to Find the Cause and Fix It
A harsh 1-2 shift on a Ford 10R80 is the E clutch releasing while the C clutch applies. Here is how to tell software, valve body, and CDF drum causes... Read more...
10R80 No Reverse: Causes, Diagnosis, and the Fix
10R80 No Reverse: Causes, Diagnosis, and the Fix
Ford 10R80 reverse uses the A, B, D and F clutches. Follow Ford's own diagnosis order - codes, fluid, line pressure, stall test, then F, B and D clutch apply... Read more...
10R80 Slipping in Overdrive: Causes, Diagnosis, and the Fix
10R80 Slipping in Overdrive: Causes, Diagnosis, and the Fix
A Ford 10R80 that flares in 8th, 9th or 10th is telling you which clutch is slipping. Use Ford's clutch application chart to narrow it down, then fix the strategy,... Read more...
10R80 Stuck in Limp Mode: Causes, Diagnosis, and the Fix
10R80 Stuck in Limp Mode: Causes, Diagnosis, and the Fix
A Ford 10R80 in limp mode is the computer protecting the transmission after a fault. Here is what each code group means, the diagnosis order from Ford TSB 24-2101, and... Read more...
10R80 Won't Shift Into 3rd Gear: Causes, Diagnosis, and the Fix
10R80 Won't Shift Into 3rd Gear: Causes, Diagnosis, and the Fix
A 10R80 stuck in 2nd is usually the E clutch, its valve body circuit, or the one-way clutch Ford's TSB 26-2112 covers. Here is the diagnosis order and the part... Read more...
6R80 Won't Downshift: Causes, Diagnosis, and the Fix
6R80 Won't Downshift: Causes, Diagnosis, and the Fix
A 6R80 that won't downshift is telling you which clutch circuit is in trouble. Here is the diagnosis order, the common causes from solenoid drift to regulator wear, and the... Read more...
6R80 Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
6R80 Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
A 6R80 stuck in 1st comes down to the C (2-6) clutch applying on the 1-2 shift. Here is the diagnosis order, the common causes from sensors to clutches, and... Read more...
6R80 Won't Shift Into 3rd Gear: Causes, Diagnosis, and the Fix
6R80 Won't Shift Into 3rd Gear: Causes, Diagnosis, and the Fix
A 6R80 that loses 3rd gear comes down to one added clutch: the B or 3-5-R clutch. Here is the diagnosis order, the common causes, and the part that fixes... Read more...
5R110W Won't Downshift: Causes, Diagnosis, and the Fix
5R110W Won't Downshift: Causes, Diagnosis, and the Fix
A 5R110W that won't downshift is usually a speed sensor, wiring, or shift solenoid problem, since the PCM controls every shift directly. Here is the diagnosis order, the codes, and... Read more...
5R110W Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
5R110W Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
A 5R110W stuck in 1st usually means the PCM lost a speed sensor signal or the SSPC-B overdrive clutch circuit can't apply 2nd. Here is the diagnosis order and the... Read more...
5R110W Won't Shift Into 3rd Gear: Causes, Diagnosis, and the Fix
5R110W Won't Shift Into 3rd Gear: Causes, Diagnosis, and the Fix
A 5R110W that loses 3rd gear points to one circuit: the intermediate clutch and its SSPC-C solenoid. Here is the diagnosis order, the codes, and the fix. Read more...
4R100 Won't Downshift: Causes, Diagnosis, and the Fix
4R100 Won't Downshift: Causes, Diagnosis, and the Fix
A Ford 4R100 that stays in a high gear or will not kick down usually has lost solenoid power, a bad solenoid block, or starved solenoid feed oil. Here is... Read more...
4R100 Shift Solenoid Symptoms: How to Diagnose SS1, SS2, TCC and EPC Failures
4R100 Shift Solenoid Symptoms: How to Diagnose SS1, SS2, TCC and EPC Failures
A Ford 4R100 that starts in a high gear, skips shifts or won't lock up often has a failing solenoid pack. Here is how to read the symptoms, resistance-test SS1,... Read more...
4R100 Overheating: Causes, Diagnosis, and the Fix
4R100 Overheating: Causes, Diagnosis, and the Fix
Ford 4R100 running hot? Here is how the cooler bypass, pump pressure regulator, pump wear and a slipping converter clutch cause 4R100 overheating, and which parts fix it. Read more...
4R100 Delayed Engagement: Causes, Diagnosis, and the Fix
4R100 Delayed Engagement: Causes, Diagnosis, and the Fix
4R100 slow to go into Drive or Reverse? Learn how to tell converter drainback, a worn boost sleeve and loose clutch clearances apart, and which parts fix each one. Read more...
4R100 No Movement in Drive: Causes, Diagnosis, and the Fix
4R100 No Movement in Drive: Causes, Diagnosis, and the Fix
4R100 will not move in Drive? Use a range-by-range test to narrow it down to the OD one-way clutch, forward clutch, input shaft or converter, and see which parts fix... Read more...
4R100 Shudder Fix: TCC Control Valve, Converter Flow, and the Real Cure
4R100 Shudder Fix: TCC Control Valve, Converter Flow, and the Real Cure
4R100 shaking when the converter locks up? Here is why the PWM lockup circuit shudders, how to test cooler flow and the bypass before buying a converter, and which part... Read more...
4R100 Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
4R100 Won't Shift Out of 1st Gear: Causes, Diagnosis, and the Fix
4R100 stuck in 1st or jumping from 1st straight to overdrive? Here is how the 4R100 makes the 1-2 shift, how to test shift solenoid 2, and which part fixes... Read more...
4R100 Harsh 1-2 Shift: Causes, Diagnosis, and the Fix
4R100 Harsh 1-2 Shift: Causes, Diagnosis, and the Fix
4R100 banging hard into second gear? Here is how to separate an EPC pressure problem from a worn modulator or accumulator valve, and which part fixes it. Read more...
4R100 No Reverse: Causes, Diagnosis, and the Fix
4R100 No Reverse: Causes, Diagnosis, and the Fix
4R100 drives fine forward but reverse is gone, slow or slipping? Here is how to narrow it down to the manual valve, low/reverse modulator or clutch clearance, and which part... Read more...
4R100 Slipping in Overdrive: Causes, Diagnosis, and the Fix
4R100 Slipping in Overdrive: Causes, Diagnosis, and the Fix
4R100 flaring on the 3-4 shift or slipping in fourth? Here is how to tell converter clutch slip from an overdrive clutch problem, the air test that finds hidden leaks,... Read more...