Question about 1997 Chevrolet Tahoe

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97 chevy tahoe 5.7 engine 2 wheel drive. im having problems in shifting into 3rd an 4th gears. some days itl shift in the morning an give some touble thur the day. while on other days it wont shift in the morning, but shifts fine the rest of the day. ive had days where it shifted fine in the morning, an i make a stop for about an hour then head out again an it wont shift for about 7 to 10 miles then its fine the rest of the time. took it to a tranny shop an the told me it had a code of 1870 a tcc code. can u help me please??!!

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1 Answer

The torque converter clutch issue, won't effect the
shifting issues

I would stop using it,unless your prepared to
completely rebuild it, in a few weeks.

It has to be diagnosed and resolved, now,quickly.

Having once owned a trans shop, I don't like the
fact your driving it at all,hung shifts for 7 miles
will do it in

Posted on Mar 17, 2011

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2005 avalanche 1500 4 x 4 won't shift from 2nd to 3rd or 4th gear


could PCM be problem ???? sure , so could a lot of other thing's ! You know how to test electrical circuits using a wiring diagram an a DVOM - digital volt ohm meter ? How to test shift solenoids ? How to test power an ground at the PCM - engine computer ? You don't want to just replace the PCM , needs to be programmed . Dealer . Not having it done will cause more problems then you have now > NO transmission shift solenoid DTC'S - diagnostic trouble codes ? Transmission mechanical problem .
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1 Answer

97 Chevy Tahoe code Po 758


This is from Repair Pal...just Google your code (P0758) to find other helpful suggestions

OBD-II Code P0758 is defined as a Shift Solenoid B Electrical The purpose of the automatic transmission is to match the engine's optimum power and torque characteristics to the driver's desired rate of acceleration and speed by auto-selecting different gear ratios or 'speeds' to power the wheels. Shift solenoid B enables the transmission to shift from 2nd gear to 3rd gear. It does this by re-directing the flow of the transmission fluid which changes the position of the shift valves in the valve body.
When the code P0758 is set in the Powertrain Computer, it means that the Powertrain Computer or PCM is not seeing the specified rpm change that occurs during a shift from 2nd gear to 3rd gear. It's also not seeing the correct increase in road speed from the vehicle speed sensor.

P0758 Symptoms
  • Check Engine Light will illuminate
  • Vehicle will not shift from 2nd gear to 3rd gear properly
  • Decrease in fuel economy
  • In unusual cases, there are no adverse conditions noticed by the driver
  • In some cases, there may be performance problems and possibly misfire-like symptoms
Common Problems That Trigger the P0758 Code
  • Defective Shift Solenoid
  • Defective Shift Solenoid wiring or connector
  • Defective Valve Body
  • Dirty transmission fluid that restricts the hydraulic passages

Jan 01, 2018 | Cars & Trucks

1 Answer

My 02 Tahoe will shift in to Gear but won't move. Just sits there like ur holding down the brakes. I jacked up the rear of the vehicle and put it in neutral and i can't turn the rear tires at all.


I put my truck into drive or reverse n it will not move at all ...

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CarGurusJan 27, 2014 - Alright well normally I can feel my truck shift into drive or reavers but it's not but .... running while won't move,I mean it moves but won't change gear,fluids good ... I have a 2002 Mercury Stabler Car starts up fine but will not move ... I hear a pop and my tahoe stops pulling and no reverse either it just revs up.

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From what you are describing, it is possible either the 3-4 actuator is no longer playing with the 3rd & 4th clutch packs, only way to know for certain is to hook up the good ol' pressure gauge to trans. system, yeah, you think the Chevrolet dealer should know this right?

Sell it now if you can!
Smiles

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Pretty much all the time!

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1 Answer

92 chevy s10 4x4 4.3L manual transmission no 3rd gear


Hi:

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1 Answer

4L 60E - 2001 k1500 will not shift into 3-4. Oil is not burn't and stifts great into1-2


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1 Answer

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1 Answer

Hang up in third gear loss of power


Hi All

I have a s40 1.9d / 2000 plate,
In the last month or so the car loses revs when changing up to 3rd and 4th gear, I can only get 50 mph max in 3rd gear 80mp in 4th.
The car has just clocked 185,000 miles
Its a great car but a pai at the moment, I've had a service including fuel fillter change added fuel cleaners to the deilsel all to no avail


Any suggestions

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