Question about 1996 Buick Century

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Doesn' shift right between 1st and 2 gears it shfts with a pause and a harsh shift already changed the torque converter solenoid and fluid and filter no change.

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  • Anonymous Mar 29, 2014

    A 4T65E trans. has a harsh shift only when hot in all gears and only on ocations. This took place after I changed the filter and oil.

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  • Master
  • 3,113 Answers

You need to replace the pressure solenoid in the transmission.

Posted on Oct 09, 2009

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1 Answer

My honda engine sometime juddering when i shift the gear 1st to 2nd, 3rd.


If car doesnt run smooth at idle then othr igntion parts r bad. Othrwise its the trans or torque converter. Chec fluid cond or hav it testdrivn

Sep 13, 2015 | Honda Cars & Trucks

1 Answer

Wont shift to 3rd code say the transmission torque convrter solenoid needs to be replaced 2005 chevy suburban


The code probably says the solenoid is not working correctly or the signal from the solenoid is out of range.
The solenoid would need to be tested and maybe replaced.

Aug 20, 2012 | 2005 Chevrolet Suburban

1 Answer

1999 dodge ram take of WOT fine threw all gears and can feel the lock up ingage fine. at 55 mph crusing and heavy accel it goes like its in neutral.


The situation you describe could be (i) low fluid in the torque converter, (ii) a faulty signal to or from the torque clutch solenoids, (iii) a crack in the torque lock up solenoid pipe leading to fluid pressure loss, or (iv) the torque clutch solenoid modulator is faulty. 1) Is there plenty of fluid on dip stick? 2) have the (transmission diagnostic) codes read at Autozone 3) Check that the transmission electrical connector plug socket pins are clean and free of corrosion 4) Check solenoids - Drain fluid, remove transmission pan and remove filter. Now looking at the back edge of the valve control assembly from left to right (as viewed in direction of travel) is the force motor/pressure control solenoid, two identical square shaped solenoids corresponding to '2 to 3 shift' and '1 to 2 shift' and, last on the right, the forward clutch accumulator. On the front edge of the valve assembly, again from left to right, we have torque converter clutch solenoid (A) and immediately above it, pointing straight up, the torque converter lock up solenoid (B) and finally on the left the 'down shift 3 to 2' solenoid. Unplug the torque converter clutch solenoid (A) and using a small screw driver remove the solenoid's retaining clip from the close by slot. Remove the solenoid. Also disconnect and then remove the two securing bolts holding the torque converter lock up solenoid (B) assembly and drop that out. Thoroughly clean both solenoids. Check up the end of the pipe of (B) with the aid of torch and look for any signs of cracks. Check both solenoids across the connector pins for electrical resistance: (B) should have 20 to 25 ohms and (A) should be 10 to 15 ohms. If there is either no or infinite resistance then this indicates either a short or open circuit respectively and the solenoid should be replaced. Note that (B) is an 'on/off' type solenoid and can be opened and closed by applying a 12volt source across the pins; (A) is a 'pulse width modulated' solenoid and so cannot be easily tested for full operation in isolation.

Jul 06, 2011 | 1999 Dodge Ram

1 Answer

04 ram 1500 2wd. trans shudder at cruising speeds under 55? Doesn't during acceleration. Change filter and fluid to no avail.


That sounds like a torque converter problem more than likely. It sounds like it's trying to lock up (supposed to do that above 60mph) at a low speed. It will feel like a harsh shift or a shudder when it's trying to engage. Just to make sure I'm correct, drive it and listen to all the gears. When at 55-60mph after it has gone into it's top gear it will normally drop about 200-300rpm when the torque converter locks up.

Jun 07, 2011 | 2004 Dodge Ram 1500

1 Answer

My bravada (2000) has a transmission problem. I took it to an expert and he said it doesnt have a second gear and it will cost 1200 to 1800 to fix. Is there any other way? Is there any recalls on this year...


CHECK TRANSMISSION FLUID LEVEL.IF TRANSMISSION FLUID AND FILTER BEEN CHANGED.MAKE SURE ENGINE FINE TUNED AND TRANSMISSION DOWN SHIFT CABLE HAS BEEN ADJUSTED.OTHER POSSIBLE CAUSES TRANSMISSION NOT SHIFT TO SECOND GEAR. YOU HAVE FAULTY STUCK 1 - 2 SHIFT SOLENOID. OR TORQUE CONVERTER SLIPPING NOT LOCKING UP DUE TO DAMAGED TORQUE CONVERTER CLUTCH VALVE OR TORQUE CONVERTER FAULTY.

May 19, 2011 | 2000 Oldsmobile Bravada

1 Answer

1998 jeep grand cherokee 4x4. have the p0740 code. have to start from neutral, then shifts faily well. May start fluttering and making noise, have to put back to N, then to D and once again will shift. ...


P0740 JEEP - Torque Converter Clutch Circuit
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Transmission shift shock
- Vehicle may not shift into the highest gear

Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty torque converter clutch solenoid valve
- Torque converter clutch solenoid valve harness or connectors
- Torque converter clutch solenoid valve circuit is open or shorted

When is the code detected?
Torque Converter Clutch (TCC) unlocked for 10 sec., ECM commands converter lock-up and did not record engine speed drop.

P0740 JEEP Description
The torque converter clutch solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module (ECM). Lock-up piston operation will then be controlled. When the torque converter clutch solenoid valve is activated, the torque converter lockup clutch will engage creating a 1 to 1 RPM ratio between the transmission input shaft and the rotational speed of the torque converter.

Lock-up operation, however, is prohibited when A/T fluid temperature is too low.

When the accelerator pedal is depressed (less than 2/8) in lock-up condition, the engine speed should not change abruptly. If there is a big jump in engine speed, there is no lock-up.

Mar 27, 2011 | 1998 Jeep Cherokee 4WD

1 Answer

Car won't accelerate and when it does it jerks hard. can't get over 50 mph


MAKE SURE YOUR ENGINE FINE TUNE. CHECK TRANSMISSION FLUID LEVEL.IF FLUID LEVEL OKAY.DO A FILTER AND TRANSMISSION FLUID CHANGE IF ONE HAS NOT BEEN DONE A LONG LONG TIME.SOUND LIKE TRANSMISSION SLIPPING. IF FLUID + FLUID LEVEL OKAY AND FILTER HAS ALREADY BEEN DONE.YOUR TV SHIFT CABLE LOOSE NEED ADJUSTING. IF YOU SEE A CHECK ENGINE LIGHT FLASHING LOOK FOR TRANSMISSION FAULT CODES LIKE TORQUE CONVERTER CLUTCH SOLENOID OPEN OR FAULTY TORQUE CONVERTER.YOU COULD HAVE FAULTY SHIFT VALVES.BEST GET CAR CODE SCAN.YOU HAVE MANY SHIFT VALVES.

Mar 02, 2011 | 1999 Oldsmobile Alero

2 Answers

My shifting is skipping gears in my 1993 dodge ram 250 conversion van. My mechanic doesn't know why. I think it might be something that connects to the transmission. donna_rdly@yahoo.com


First thing you will need to do is change the transmission fluid and filter. You may have metal shavings inside your transmission pan blocking the filter kit and this would cause your vehicle to skip gears. Try installing the new fluid and filter kit first. Since you will have the pan off, replace the A and B shift solenoid if the new filter kit and fluid don't stop your transmission from skipping gears

Nov 06, 2010 | 1993 Dodge Ram

1 Answer

I have a 1994 Chevy 2500 2 wheel drive. It shifts hard from 1st to second. If also will not drop down into a passing gear when you mash on the accelerator. Any Ideas?


do you have any trans related trouble codes, this trans has electronic shift control so u may have a solenoid sticking or a valve body issue, has the fluid ever been changed along with the filter? this is due every 60,000 miles, this has cured the problem in many cases like yours, fluid wears out (friction modifiers) and can cause harsh shifts.

Aug 13, 2009 | 1994 Chevrolet C1500

3 Answers

1997 Mazda protege transmission, Hard shifting from 1st gear


I would try a flush. If its set up like my 96, and it likely is, changing the trasmission gasket and filter will be difficult. Mine has a medal plug on the bottom and takes an allen wrench, and possibly a breaker bar. If you take out this plug, drain, flush then refill via the dipstick tube and a funnel, it may help. You may need to do this a couple of times due to fluid still in the torque converter, pan, etc.
Lucas is good stuff, I would add it again when I was done. The tranny fluid should be pink, mine looked like used oil black before I flushed it.
Also, when adding the new fluid, shift slowly up and down through all of the gears to lube well and check your fluid levels after 100 miles or so, as sometimes a bubble will form and make it look full....then not after it pops.

Dec 07, 2008 | 1997 Mazda Protege

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