95 olds cutlass ciera 3.1 v6 torque contverter lock up (or seems to be rpm increases) disengages on highway speed what is the cause or defects that you may know?

I really needs checking against the spark plugs you have chosen? .045" is about right for most.

1989-1996 Oldsmobile Cutlass Ciera 3.1L 3.3L V6 6 pc NGK ...

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This 6 pack NGK V-Power Spark Plug fits your 1996, 1995, 1994, 1993, 1992, ... 1989, Oldsmobile, Cutlass Ciera, 3.3L V6;Gap 0.060";Oe Equivalent Design ...

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  1987-1995 Oldsmobile Cutlass Ciera 2.8L 3.1L V6 6 pc Champion ...

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  6 pc Champion Copper Plus Spark Plugs for 1987-1995 Oldsmobile Cutlass Ciera 2.8L ... 1988, Oldsmobile, Cutlass Ciera, 2.8L V6;Plug Type Rs15Lyc; Gap 0.045"

What is the Spark plug gap on 95 olds cutlass Cierra? - Answers

https://www.answers.com > What_is_the_Spark_plug_g...
Aug. 4, 2007 - Standard gap is .060" or 1/16".Ask at auto parts counter when purchasing spark plugs. What is the 1972 olds cutlass 2 barrel spark plug gap ...

There is a red wire close to the battery in the front. It's not connected to anything. Apply positive voltage and that will run your pump for testing purposes.

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could be a bad torque converter in the trans. if it drops out of lock up it will cause higher rpms will driving on the highway

1 2 3 4 5 6 if its a 3.1L with an "M" in the vin code. Olds had the 3.1, the 3.4, and the 3.8L V6 engines that year

check air and fuel filters most likely the fuel filter and possible tune-up

Hi
Fit the torque convertor to the gearbox first, make sure it locates fully with the pump drive on the g/box(the round section that's got two flat sections) in the centre of the bellhousing. Make sure the convertor does not slip out when mating engine and g/box, when mated there should not be any gap between engine and g/box(transmision) without any bolts tightened, secure transmision to engine then only replace the bolts that holds the torque convertor to the flexplate.

Regards
Phillip

this sounds like the transmission torque converter clutch is not releasing, it causes this exact symptom. Have a local trans shop test drive it, in these tough times they will do that for free hoping to get the repair job.

Overdrive has two important factors involving when and if it turns on besides being in the proper gear shift position. One is tthe car has to FIRST reach operating temps before it will engage the TCC ( torque converter clutch ). That could involve a faulty thermostat, or short distance drives, Second important factor WILL DISENGAGE WHEN STEPPING ON THE BRAKE PEDAL. A brake switch could be misadjusted , and without you stepping on the brake, the computer thinks you are and wont engage TCC. Hope this helps.

take off the top hose then remove the houseing it should have 2 -4 bolts after you remove them pull out the thermostat this is on a v6 or v8 let me know what you have if you would

its the lock-up solenoid that cause the problem driver side trany cover on top cant mist it . good luck pierre