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I have a skipping or hesitation at speed ranges of 40 to 55 mph. Feels like the torque converter is trying to lock-up and unlock (hunting). Need any ideas that might resolve my problem.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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emissionwiz
  • 76630 Answers

SOURCE: car shudders at 40-55 MPH

How about the CV joint?? were they inspected for wear??

Posted on Aug 01, 2008

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  • 51 Answers

SOURCE: hesitation at 40mph and 50 mph.

A pop and hesitation is likely a backfire. The hesitation around 40 and 50 would be in keeping with that theory. There are several reasons you might be getting backfires and hesitation. If your ECM is adjusting the engine to run too rich this could happen. Misfiring might be occuring. Timing could be out. But one of the most likely is a restricted exhaust, likely due to a plugged, damaged or worn out catalytic converter. In some cases the converter may be bad enough to be giving you some performance problems, but not yet quite bad enough to signal an error. A vacuum test can help confirm whether this is exhaust related.

Posted on Feb 07, 2009

  • 7 Answers

SOURCE: Torque converter lock up problems

yeah i know exactly what it is its one of the transmission solenoids i beleive its called the torque converter circuit

Posted on Apr 13, 2009

motor1258
  • 6674 Answers

SOURCE: P0404 err code and it feels like engine serges 45 to 55 mph

Check your EGR valve hose for leaks/cracks etc, remove wiring connector & clean all contacts. Remove battery terminals before you start, but make sure you don't have to recode your anti-theft, or code your stereo, without proper info ready at hand. If your not sure, leave them on, but make sure key is off. Try again now, and see if code returns, if it does, get a new gasket for EGR valve, remove it & clean it thoroughly with throttle body spray cleaner, and re-install. It should be located close to throttle body, with 2 bolts attaching it to intake manifold. Near TP sensor & IAC motor. Try again, but see if you can get codes erased prior to, or immediately after, and see what happens.

Posted on Apr 26, 2009

ourhowse
  • 2007 Answers

SOURCE: 2004 GMC sierra 5.3 eng 1500 transmission shutter 40-55 mph

Try changing the fuel filter. I think it's starving for gas and the transmission can't decide what to do.

Posted on May 21, 2009

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1 Answer

The tranny wont shift up in drive from third at about 40 mph the tranny starts to hesitate stutter. already changed oil filter and speed solonoid


just by your description (detailed) id say it could go a few directions ??4 a cause, one way is the 40 mph is near the speed that overdrive is engaged (42 mph) these do sometimes have problems inside them (gears ) also the stutter you mention is sort of an indication that your torque converter didn't lock up or is locking/.unlocking this is an indication of a immanent torque converter failure , if car was made past 2001 then chances are good it has some kind of transmission control system that could log a fault to help you look for a cause like a faulty speed sensor or something , ck your codes !!

Apr 12, 2016 | Cars & Trucks

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98 Pontiac gtp skips 3rd gear to overdrive at 40 mph. It also dies and speedometer goes crazy starts right back up every time.Is it an electrical problem?


Try disconnecting the torque converter. If it is the torque converter this will keep it from skipping but you won't have overdrive

Aug 06, 2014 | Cars & Trucks

1 Answer

Vibration in transmission


I do not know if this vehicle has a torque converter lockup or not, but sounds like it. Does the transmission stop shaking when you go over 65? Some vehicles have a torque converter lockup, which means when the vehicle is traveling at a certain speed in high gear the torque converter "locks" and there is no slippage to the transmission resulting in better fuel economy. if the torque converter doesn't "unlock" when you slow down to say 45 then the engine will "lug" causing vibration. If this is the case you are not hurting anything by driving, just shift to 3 when it shakes then upshift under lighter load, or take it to a shop that replaces transmission sensors.

Jul 22, 2014 | 2004 Toyota Highlander

1 Answer

1999 silverado transmission


Since the transmission shifting and torque converter lock (cruise speeds) up are computer controlled you need to have a scanner hooked up that can read Transmission control module (TCM) fault codes. Also check for engine codes as this could be a misfire, but in that case the check engine light should be flashing while the engine is misfiring and set a fault code. If no codes of any kind are present in memory when the testing is done you almost certainly have a mechanical fault in the transmission like a malfunctioning torque converter clutch, but even that should set a fault code, so have the testing done.

Mar 23, 2017 | Chevrolet Silverado Cars & Trucks

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2002 Chevy silverado, at speeds of 60+ mph, it feels like the transmission slips or it sputters(hesitates), but only at high speeds


Are you certain that it is the transmission and not the engine misfiring? I would recommend scanning your onboard computer network to BEGIN proper diagnosis.

May 20, 2012 | 2002 Chevrolet Silverado 1500

1 Answer

I have a 1500, 5.7, 2 wheel drive with a 4 speed transmission with O/D . How many times should it shift including the O/D and what does the lock in torque converter have to do with it?


It should shift 4 times. 1-2, 2-3, 3-4 Then you will feel the torque converter clutch lock up which feels like a shift. The torque converter locks to increase gas mileage.

Dec 28, 2010 | 1993 GMC Sierra

1 Answer

Engine skips when the speed is 59mph then at 70 mph


sure it's skipping? Could be trans or torque converter hunting. Try locking out o/d and see if it stops or changes to a different speed but same rpm.

Mar 11, 2010 | 1995 Chevrolet Camaro

1 Answer

In overdrive it feels like my torque converter isnt locking in. Any suggestions? It is an 02 silverado and normal rpm at 70 mph is 2000 and now its running at 2300


It is possible your lock up torque convertor has a bad connection or wire.
You should be getting a check engine light on in your dash.
You will need a OBD II reader plugged in to retrieve code.
Please let me know.

Feb 09, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

92 chevy lumina 3.1 Torque convert lock and unlock


replace the TCC solenoid, if that doesn't fix it you will need to replace the torque converter, it may be shorted

Jun 17, 2009 | 1992 Chevrolet Lumina

2 Answers

E4OD Trans stays in OD no matter where the shifter position is.


Transmission Description The E4OD transmission is a fully automatic, electronically controlled, four-speed unit with a torque converter clutch. The main operating components of the E4OD transmission include a torque converter clutch, six multiple-disc friction clutches, one band, one sprag one-way clutch and two roller one-way clutches that provide for the desired function of three planetary gear sets. Transmission gear selection in the (D) range and converter clutch operation is controlled by the powertrain control module (PCM) (12A650). Operating conditions are relayed to powertrain control module by various sensors throughout the vehicle. The powertrain control module compares these conditions with electronically stored parameters and logically determines how the transmission should operate. A torque converter (7902) couples the engine to the transmission gearset via the input shaft (7017) and the torque converter impeller hub. The impeller hub provides engine rpm to the positive displacement pump. The flow from the pump is proportional to engine rpm, and excess pump capacity is exhausted back to the pump inlet. The input shaft transfers power into the transmission gearset. The power input is controlled by the application of the torque converter clutch, which is scheduled through the powertrain control module. The application of the piston plate effectively replaces the hydraulic coupling between the converter cover and the turbine with a mechanical coupling between the converter cover and the turbine hub. This mechanical coupling helps improve fuel economy and wide-open throttle performance by eliminating converter slip. Transmission shift selection and torque converter clutch operation are controlled by the PCM. They are calibrated to provide the optimal transmission state. This state is commanded to the transmission solenoid body. In the (D) range, automatic operation of all four gears is possible. The transmission control switch, located on the vehicle's shift lever disables overdrive operation and enables automatic operation through the first three gears. Whenever the ignition switch is turned on, the vehicle will automatically provide overdrive operation regardless of the switch position the last time the vehicle was running. Manual gear selection is available in the 1 and 2 range. Second gear is commanded when the gearshift selector lever is in the 2 range and when downshifted into the 1 range at speeds above approximately 56 km/h (35 mph) (for diesel 48 km/h [30 mph]). First gear is commanded in the 1 range at start-ups and when downshifted into 1 range below approximately 56 km/h (35 mph) (for diesel 48 km/h [30 mph]). Any reference to intermediate brake drum or direct clutch cylinder are one and the same.
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I think this is your problem:

Programmable Speedometer/Odometer Module (PSOM): Description: The programmable speedometer/odometer module receives input from the rear brake anti-lock sensor, which is mounted on the rear axle differential housing. The PSOM processes this input signal information and relays it to the powertrain control module and the speed control module. This signal tells the powertrain control module the vehicle speed in miles per hour (mph). Used as an input in determining shift scheduling and electronic pressure control. Symptoms: Harsh engagements, firm shift feel, abnormal shift schedule, unexpected downshifts may occur at closed throttle, abnormal torque converter clutch operation or engages only at wide-open throttle (WOT). May flash transmission control indicator lamp. Diagnostic Trouble Codes: 452, P0500, P1500, P1501, P0503

Mar 21, 2009 | 1993 Ford F150 SuperCab

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