Question about 1995 Ford Explorer

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When i step on the gas the transmission occasionally slips for about 2 seconds before it grabs. and the problem is becoming more frequent

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First change the filter and oil add lucas transmisson oil treatment to the tranny and it should clear up, the common problem for these trasnmissons. if you have done this then you have a shift valve going bad.

Posted on Jul 16, 2009

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Transmission is slipping fairly regularly. 2011 Chevrolet Impala, 3.5L, used the snap on diagnostics scanner and no codes present in trans side, but P162B under the engine.


If the transmission is slipping it is not an electronic problem it is a failure of the clutch pack or the internal hydraulic pressure is low. The computer only controls the shifting through the solenoids.

Oct 13, 2016 | 2011 Chevrolet Chevrolet Impala LT

1 Answer

Engine code 894


DTC P0894 Transmission Component Slipping
DTC P0894Circuit Description with 4L80-E / 4L85-E Automatic Transmission The powertrain control module monitors the engine speed and the transmission output shaft speed. The PCM calculates turbine shaft speed and torque converter clutch (TCC) slip speed by using inputs from the automatic transmission input shaft speed sensor, automatic transmission output shaft speed sensor, and other transmission components. The forward clutch housing is used as the AT ISS rotor. Whenever the TCC is engaged, engine speed and turbine speed will closely match, indicating low TCC slip speed. In D3, with the TCC engaged, calculated transmission component slip can only occur in the torque converter. In D4 OVERDRIVE, with the TCC engaged, transmission component slip can occur in the TCC or the fourth clutch assembly. If the PCM detects an excessive TCC slip speed in D4 OVERDRIVE, when the TCC should be engaged, then DTC P0894 sets. DTC P0894 is a type C DTC. For California emissions vehicles, DTC P0894 is a type B DTC.DTC Descriptor This diagnostic procedure supports the following DTC: DTC No MAF sensor DTC P0101, P0102 or P0103. No MAP sensor DTC P0106, P0107 or P0108. No TP sensor DTC P0120 or P0220. No VSS DTC P0502 or P0503. No ISS DTC P0716 or P0717. No TCC Stuck Off DTC P0741. No TCC Stuck On DTC P0742. No 1-2 SS valve DTC P0751, P0752 or P0753. No 2-3 SS valve DTC P0756, P0757 or P0758. No TFP manual valve position switch DTC P1810. No TCC PWM solenoid valve DTC P2761. The throttle angle is 10-100 percent. Engine speed is 1,250-5,000 RPM. The TFT is Vehicle speed is TFP manual valve position switch indicates D4. The TCC is commanded ON for 0.04 second or greater. TCC is locked ON for greater than 0.1 second. Commanded The PCM detects slip in the torque converter clutch and/or the fourth gear clutch pack with the TCC in an apply or locked mode. DTC P0894 sets during the second consecutive trip when one of the following conditions occur: The TCC slip speed is 100-550 for 10 seconds for three occurrences.The TCC slip speed is 100-550 for 10 seconds, the PCM commands maximum line pressure. The TCC slip speed is 100-550 for 12.5 seconds, the PCM commands the TCC Off for 2 seconds. The TCC slip speed is 100-550 for 15 sec For California emission equipped vehicles, the PCM illuminates the malfunction indicator lamp during the second consecutive trip in which the Conditions for Setting the DTC are met. For Federal emission equipped vehicles, the MIL is not illuminated. The PCM commands maximum line pressure. The PCM inhibits the TCC engagement. The PCM freezes transmission adaptive functions. The PCM records the operating conditions when the Conditions for Setting the DTC are met. The PCM stores this information as Freeze Frame, California only, and Failure Records, California and Federal. The PCM stores the DTC P0894 in PCM history during the second consecutive trip, California, or the first trip, Federal, in which the Conditions for Setting the DTC are met. For California emissions, the PCM turns OFF the MIL during the third consecutive trip in which the diagnostic test runs and passes. A scan tool can clear the MIL/DTC. For California emissions, the PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without an emission related diagnostic fault occurring. For Federal emissions, the PCM clears the DTC from PCM history if the vehicle completes 40 warm-up cycles without a non-emission related diagnostic fault occurring. The PCM cancels the DTC default actions when the fault no longer exists and the ignition switch is OFF long enough in order to power down the PCM. A TFP manual valve position switch malfunction can set DTC P0894. A mechanical failure of the shift solenoids or TCC PWM solenoid valve can set DTC P0894. Internal transmission failures can result in a DTC P0894. Sticking or contaminated shift valves may cause intermittent slipping in D4. DTC P0894 defaults to an elevated line pressure condition which may result in partial TCC apply. This may produce an idle surge that could stall the engine. The numbers below refer to the step numbers on the diagnostic table. 3. This step tests the indicated range signal to the actual selected range. A faulty TFP manual valve position switch can set a DTC P0894. 4. This step tests for excessive TCC slip speed while in a commanded TCC lock-up state and in fourth gear; and confirms that the fault is present. 5. This step tests for excessive TCC slip speed while in a commanded TCC lock-up state and in third gear. 6. This step tests for a sticking TCC shift valve. 7. This step tests for proper transmission line pressure.

Apr 18, 2014 | 2005 GMC Sierra 2500HD 4WD

1 Answer

94 Isuzu Rodeo 3.2L V-6, automatic transmission slips from first to second


guesses? there are over 10.

1; low level or too high ATF.
2: filter packed. do the service now.
3: low pump pressure.
4: bad clutch packs, if it slips now, it will get worse faster.
5: or any of the other vast ways to get the wrong pressure to the servos. (huge list)
the fsm covers on car check for a/T why not read that.?
every step.

Apr 13, 2014 | 1994 Isuzu Rodeo

2 Answers

Transmission


A/T or M/T (auto or stick ,we dont know)
n moving in drive, reverse or Low or 1? or 2? (me too lazy to look what tranny you have)
it can be 2 things
1: lack of engine power
2: bad clutch or transmission

who do we tell? easy
you step on gas , RPM goes way high and MPH dont. (slips)
tranny slip.
you step on gas, RPM tracks with MPH, good ,
you then do the 5second max. tranny stall test in every car FSM made. and see the stall speed, with brakes hard set.
too high is tranny slip
way to low, engine power POOR.

alldata.com has all this on tranny. stall speed.
the FSM turn to on car A/T service, see STALL test.
bingo.
or youtube the vast number of videos on topic, stall.


wont move at all ,can be :
brake drag (passes stall test)
but first , the tests are, for bad engine or trans,
pick the one it is , state so, and we can go much farther.

Nov 26, 2013 | 1992 Honda Accord

1 Answer

Turbo 350 slipping in 3rd gear fluid clean, think the kickdown linkage cuased it.. Runs ok in 1st and second, then around 45mph it slips and i ease off and it slowly grabs and slips again!


Have you serviced the transmission? There is a filter, in the transmission pan that gets clogged with disk material, then the trans pressure gets reduced, then slipping and damage happens.

Mar 14, 2010 | Oldsmobile Cutlass Cars & Trucks

1 Answer

MY 1993 LINCOLN TOWN CAR SOMETIMES HAS NO RESPONSE IF I COAST MY SPEED FROM 45 TO 35 AND THEN HIT THE GAS THE ENGINE REVS UP BUT NO FORWARD RESPONSE FOR MAYBE 5 SECONDS. AFTER A TUNE UP IT HELPED FOR A...


It sounds like your torque converter may be going out in the transmission. My first thought would be the high pressure lines, but you had them replaced which goes to the next in line being the converter.

Oct 27, 2009 | 1993 Lincoln Town Car

3 Answers

Automatic car won't shift from 2nd to 3rd, it just revs up


no you have a failed transmission on your hands, it is slipping.

Aug 13, 2009 | 1993 Oldsmobile Cutlass Ciera

2 Answers

'94 VW Jetta III - clutch ''slipping''


I would have the clutch adjusted

Aug 01, 2009 | 1994 Volkswagen Jetta

1 Answer

Transmission vibrating and slipping


for vibration check your transmission support then for slipping try to adjust your clutch higher than before...

May 10, 2009 | 1994 Lincoln Town Car

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