Question about 1998 Chevrolet S-10 Pickup

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1998 S10 2.2 automatic, when in overdrive it pulsates like the lockup converter is not locking. is there an easy fix?

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Posted on Jan 02, 2017

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SOURCE: Car pulsates when shifting into overdrive.

Need to verify if its overdrive or the torque converter locking up. If its when it engages overdrive these transmissions are noted for the 4th clutch hub splines stripping out and 4th clutches slipping, Need to verify. Have vehicle checked for trans codes, a code P1811-long shift, max. adapt could be many things. If it just when the torque converter locks up it could be the converter itself or an EPC solenoid sticking especially with a P1811 code. Either way it is proablly handled best by a professional.

Posted on Mar 01, 2010

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SOURCE: 1998 s10 i need help with mt 1998 s10 nz4

rebuild transmission use hd zpac clutches for 3and 4 gear

Posted on Feb 04, 2011

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1 Answer

Can a bad torgue converter solenoid switch cause a knocking noise in a 1998 Plymouth Grand Voyager?


Doubtful. Usually the only symptom is the Trans doesn't lockup when in overdrive so you lose 1-2 mpg.

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There is no part called the lockup sensor, the lock up occurs when the Vehicle speed sensor sends a signal to the Transmission control module that the truck has reached the minimum speed and throttle angle for lock up to take place, it then activates a switch inside the transmission that locks up the torque converter clutch.

Nov 02, 2012 | Cars & Trucks

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Check engine light on wont go into lockuo overdrive


BAD SWITCH OR TORQUE CONVERTER LOCKUP SOLENOID IN ******.LIGHT ON MEANS YOU MORE THAN LIKELY HAVE A TRANSMISSION TROUBLE CODE STORED IN THE PCM/TCM

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Trans axle humming noise


If you go really easy on the gas you should hear & feel
all 4 or 5 gears shift,whichever you have

You should also feel converter clutch lock-up when in
the top gear, which you call overdrive.
That will occur around 40 mph if you stay steady on the gas

You can lightly hold the brake down & the (TCC) Torque Converter
should unlock & the engine RPM go up

I suspect you have no lockup thus wrong dash speed indicated

That will eventually over heat the trans

You get lock-up in other gears under certain load conditions

You could have a bad solenoid in transaxle & any other sensors
that play a role in shift strategy

Sep 28, 2012 | 1998 Oldsmobile 88

1 Answer

Transmission light on. Rpm go to 3000 when I'm doing 55mph.it not going into 4th gear (overdrive) what's wrong with my truck?


It seems as though your electronic "lock up" on the torque converter is not actuating. TCC lockup/Torque Converter Clutch lockup.

Oct 05, 2010 | 1996 Dodge Ram 1500 Club Cab

1 Answer

My speedometer broke which in some didn't send a signal to the transmission that it had to be cooled. I burned up 2 transmissions in less 3 days...this is related to lockup....Can someone tell me what...


Lock up is a feature within the transmission torque converter which is a fuel saving measure.At cruising speeds,the torque converter "locks up" creating a 1:1 ratio from engine rpm to transmission input.This is somewhat like overdrive in a sense. TCC (torque converter clutch ) depends on the vehicle speed sensor input to determine cruising speeds and conditions where TCC is permissable.Incorrect TCC operation can cause subsequent damage and/or serious driveability problems.

Jul 09, 2009 | 1995 Toyota 4Runner

1 Answer

Driving me nuts


If it is automatic transmission with overdrive the lock-up torque converter is kicking in and out causing the rpm to fluctuate.Could be just the converter or maybe the overdrive going out.

Aug 25, 2008 | 1998 Jeep Cherokee

1 Answer

2002 Dodge 2500 diesel auto


could be a bad lockup solenoid or a bad torque converter

Aug 25, 2008 | 2001 Dodge Ram 2500 Truck

1 Answer

87 honda accord


Probably a bad torque converter lock up solenoid...

Try starting it in neutral, and putting it in drive without your foot on the brake (I know the car will take off in quite a hurry if it doesn't stall but it's an easy way to check for this)

If it doesn't stall, apply the brakes, and if it stalls then, it definitely is a bad lockup.

I don't know if you're familiar with the torque converter function/operation, but where it is a fluid (liquid) and not solid coupling with the engine, lockup is used at certain road speeds/engine RPMs to get rid of the power loss that always occurs between the pump and the turbine of the torque converter. It mechanically (through transmission oil pressure) locks both parts of the converter together so it then acts like the engine crankshaft is bolted right to the input shaft of the automatic transmission.

But, as you might imagine, this system has to unlock the converter when you apply the brakes for the same reason applying brakes without the clutch on a manual transmission stalls the engine.

Bad lockup solenoid will cause this to happen... The converter stays in lockup and as soon as you try to stop the vehicle, you also stop (stall) the engine.

It also might be something else but I'd say I'm about 90% sure on this one.

Aug 20, 2008 | 1987 Honda Accord

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