Question about 1997 Toyota 4Runner

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I believe my overdrive torque converter is going out or at least my mechanic thinks so. When my 97'4runner limited is accelerating when the speed reaches around 50 when overdrive is supposed to kick in the transmission seems go back in forth between overdrive and 4th gear a couple of times before it will stay in overdrive. Is this a common problem. I have 160,000 on it. thanks.

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The mechanic test drove and confirmed this behaviour?

Posted on Jul 14, 2009

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1999 oldsmobile intrigue stalls and surges under deceleration conditions only. Idles in neutral fine, accelerates fine, has no apparent miss. Can put in gear and travel great until under negative torque...


Do you have any codes? If so, what are they?
If not, this could be a mechanical problem with either the torque converter itself or some sort of stuck valve in the valve body inside the transmission.
I just replaced the valve body in my wife's 1999 Mercury Sable and it cleared up a number of problems she was having with shifting and torque converter lock up.
I hope this helps.
Good Luck!

Sep 21, 2013 | 1999 Oldsmobile Intrigue

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Overdrive light flashing


Sounds like a speed sensor is not letting the torque converter go into lock up mode. This condition will affect fuel consumption. Check OBDII for speed sensor fault.

May 01, 2017 | Cars & Trucks

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2000 Chevy Impala 3.8L- While driving at a constant speed the transmission will shutter or flutter between RPM's. If I back off the gas, the shuttering will stop likewise if I step it down, shuttering...


If it does it only at highway speeds...over 40 mph or so....you could have a lock up torque converter issue. (This locks up electrically for overdrive) Dissable the overdrive and see if it will go away. (drive it in 3rd, if you have a 4 speed) (Or tap the brake, this will dissable it also)

Aug 05, 2011 | 2000 Chevrolet Impala

1 Answer

Where the relay switch for over drive on the transmission II think thats whats getting stuck or not funtioning right?96 olds regency


Despite the overdrive icon and manufacturers calling it overdrive, there is no overdrive unit on your Oldsmobile. What is mistakenly referred to as an overdrive unit is the lock up torque converter. Over a certain speed (usually about 35 mph), and absent a call for heavy acceleration, the torgue converter is hydraulically locked so that the drive and driven vanes in the converter spin as a single unit. The lock-up is controlled by a solenoid valve in the side pan of the transmission. The most common problem with the solenoids is that they fail to release and keep the converter locked up which stalls the engine at stops. The usual cure is to replace the solonoid

Jul 24, 2011 | 1996 Oldsmobile Ninety Eight Regency

1 Answer

All gears are working, but once I reach 30 miles per hour the RPM's race without further acceleration


is this a three speed trans? or 4spd w/overdrive? either way i believe you have a pressure problem whether a torque converter or a trans pump. I was wondering how you know all gears worked if it will only do 30 mph as the 4th or overdrive usually wont engage at that speed. but here say,

Apr 03, 2011 | 1996 Chevrolet K1500

1 Answer

Loud whine then knock in overdrive


well, without hearing the noise myself, i could guess that the torque converter clutch might be going bad. the torque converter is the part that transfers the power from the engine to the transmission via viscous fluid motion, the converter also has a clutch that internally provides a direct connection inside the converter for better fuel economy. but as with anything labeled as a clutch, it wears down to a point where is slips. the noise your hear could be the torque converter clutch slipping. i owned a 90 astro van with the same drivetrain that made a noise similar to what you speak of up hills. while driving up hills, fully depress the accelerator and if the clunking noise occurs, then the whine goes away as you accelerate faster in a lower gear, very likely this is the case. you would have to have a transmission shop diagnose further. i drove that old van for five more years cause i didn't want to pay to have transmission repaired. it can be very expensive.

Jul 08, 2010 | 1992 Chevrolet S-10 Blazer

2 Answers

What does the torque converter solenoid do


the torque converter clutch solenoid is kind of like the clutch in a manual transmission. automatic transmissions inherently have a little slip in the transfer of power between the engine and transmission, since the transfer of power is done with fluid instead of a mechanical clutch. however, when the car is in overdrive and cruising, the TCC solenoid acts like a clutch and locks up the torque converter, making a mechanical connection and eliminating the slippage. when you accelerate or downshift, it turns off. if this switch hangs up, when you come to a stop, the car will bog down just like a manual trans would if you don't push in the clutch pedal

Feb 20, 2010 | 2000 Cadillac DeVille

1 Answer

07 pacifica 3.8 eng. with 4 speed At low rpm's 1200 to 2000 it shudders and has a jerky feeling. It runs great at 70 mph at 2200 rpm and has good floor board acceleration . 4 dealers fail to acknowledge...


Well there is a rev limiter built into the pcm on your car. It is much lower rpm's in park and neutral. When u hit the rev limit of a particular gear selection, the pcm starts cutting out the injectors(fuel). This is normal. As far as the jerky feeling, the only thing I know of is a service bulletin that may apply to your car. It involves a revised torque converter for the transmission. It would only apply if your feeling this at speeds of approx 35 mph or higher when the torque converter lockup engages after a shift. Ask your dealer about a possible tsb for this if you think this may sound like your problem or search for tsb's(technical service bulletin's) yourself on the internet.

Aug 05, 2008 | 2004 Chrysler Pacifica

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