Clutch plates chugging on start on automatic transmission on 2005 Ford F-150

When I start out it chugs a little until I get the RPMs up. It doesn't do it everytime but it has gotten steadily worse. I just had it all flushed out and had new fluid and additives put in. The mechanic said the plates looked like new?

by in Brandon, MN on May 23, 2011
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1 answer
ANSWER by , May 23, 2011
Make sure that your problem is with the transmission, not an ignition coil or something else. A good technician with a scan tool can compare the engine RPM, torque convertor slippage and output shaft speed to see if a slippage is occuring. I suspect that it could be related to TSB 09-20-14. It describes your problem and a repair procedure. ISSUE: Some 2005-2010 vehicles equipped with a 4R70/75E-W transmission may experience an un-commanded torque converter clutch (TCC) apply or TCC partial apply immediately after the 1-2 shift. This may result in the perception that the vehicle lacks power or that the transmission is up-shifting too early. Additional symptoms of uncommanded TCC apply when coming to a stop (before the 2-1 downshift is commanded), are engine stalling or lugging when engaging manual 2nd while at a stop and code P1742 may be present in continuous memory. However, the vehicle should operate normally in park, reverse, neutral and manual 1st gear. ACTION: Follow the Service Procedure for verification and repair. SERVICE PROCEDURE Monitor (TCC %) solenoid command state - duty cycle and (TC SLIP ACT) torque converter clutch slippage - RPM, while in 2nd, 3rd or 4th gear with a TCC % reading 0. If TCC % = 0 and TC SLIP ACT = less than 20 RPM then inspect the number 7 check ball in the main control valve body for damage. Replace as required following the appropriate Workshop Manual (WSM) under Disassembly and Assembly of Subassemblies - Main Control Valve Body. (Figure 1) Figure 1 - Article 09-20-14 NOTE: THIS PROCEDURE IS PERFORMED IN 2ND GEAR AUTO (NOT MANUAL 2). MONITOR (TC SLIP ACT) AFTER THE POWERTRAIN CONTROL MODULE (PCM) COMMANDS 2ND GEAR AND BEFORE THE VEHICLE SPEED SENSOR (VSS) READS 35 MPH (56 KM/H). If you receive any other reading, this procedure does not apply; follow normal diagnostic procedures as outlined in the appropriate WSM. NOTE: IT IS NORMAL FOR THE PCM TO COMMAND 4TH GEAR AT SPEEDS AS LOW AS 19 MPH ( 30 KM/H) WITH LIGHT ACCELERATION WHEN THE THROTTLE POSITION IS LESS THEN 20%. PART NUMBER PART NAME EOAZ-7E195-B Ball Check 1L3Z-7C155-AA Gasket - Valve Body Upper 1W7Z-7D100-AB Gasket - Valve Body Lower WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part. OPERATION DESCRIPTION TIME 092014A 2005-2010 Crown Victoria, Grand Marquis, Town Car, Econoline 150/250/350, 2005-2006 Expedition: Includes Time To Perform The Diagnosis Outlined In This Article And Repair (Do Not Use With Any Other Labor Operations) 2.3 Hrs. 092014A 2005-2010 F-150, 2006-2008 Mark LT: Includes Time To Perform The Diagnosis Outlined In This Article And Repair (Do Not Use With Any Other Labor Operations) 2.2 Hrs.