Question about 1991 GMC Sierra

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Have 91 gmc shift to 4th gear or overdrive i lose power

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Posted on Jan 02, 2017

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SOURCE: 1995 GMC 2500 4x4 wont shift into 3rd or overdrive most of the times

i have heard that the ignition switch can be faulty and not let the full voltage thru to the electricaly controlled 4l60e trans.i have the same problem with my 95 1/2 t. i rigged a switched wire from the fuse block via a relay to the proper wire on the trans....ask a trany tech and they will know what im talking about,,,good luck

Posted on Oct 30, 2008

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emissionwiz
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SOURCE: transmision shifting problem

Reverse is not sycronized, this means the gears have to stop to mess and not grind, two thing cause this, being to quick to slam into reverse after clutch is depressed, a problem with the clutch.

Posted on Oct 31, 2008

  • 61 Answers

SOURCE: 1996 GMC Jimmy will not shift into overdrive.

4th gear failure is a common problem with this transmission, assuming it is an automatic. You should have the vehicle checked for codes by a qualified repair center with the proper scan tool. Also, check fluid level and condition. More often than not, the trans loses 3rd and 4th gear, as these are working off the same set of clutches. 3-4 clutches apply in 3rd, and when the 4th shift is made the 2-4 band applies giving you overdrive. If you have no engine braking in manual 3rd, you definitely have a mechanical failure, no 4th could be an electrical, or mechanical fault.

Posted on Nov 18, 2009

  • 37 Answers

SOURCE: 95 GMC Sierra 4L60E will not shift down to 1st or up to 4th.

no power stuck in 3rd gear electric shop unless youve burnt it up good luck...www.TransmissionGarage.com

Posted on Dec 30, 2009

  • 693 Answers

SOURCE: My 1993 Gmc Sierra 2500 automatic first gear shifts hard also from park to drive others gears are smooth i have overdrive

The gear shift lever indicators tell you what gear you have an automatic transmission in on your vehicle. The shift solenoid tells the transmission when to shift gears and what gear to shift into. Newer model automatic transmissions have electronic shift solenoids that are activated and change gears based on the speed the vehicle is traveling. Troubleshooting either one of these transmission components is relatively easy if you know a little about automobile mechanics. With the right tools, you can determine whether the transmission shift solenoid is having a problem. Gear shift indicator problems can be determined simply by moving the gears into their designated position.
Transmission Shift Solenoid

  • 1 Raise each corner of the vehicle up with the car jack and place jack stands under the frame. Make sure the car is raised high enough so you can work under the car freely.
  • 2 Slide the drain pan under the transmission fluid drain plug. Remove the drain plug with a ratchet and socket, and let all the fluid drain out of the transmission. Remove the transmission pan bolts with a ratchet and socket. Pull the pan away from the bottom of the transmission, revealing the transmission shift solenoid.
  • 3 Wipe off the shift solenoid with a shop towel. Disconnect one of the two plugs that attaches to the shift solenoid. Turn the knob on the volt meter to the ohms setting, so resistance can be measured. Set the volt meter on 200.
  • 4 Take the black lead of the volt meter and touch the negative battery terminal wire. Take the red lead of volt meter and slide the tip into the terminal plug you just disconnected from the shift solenoid. Look at the reading you get on the digital display of your volt meter. Determine if the reading is between 12 and 25. Readings below 12 or above 25 tell you that the shift solenoid is not working. Reattach the plug to the shift solenoid and pull the second plug attached to the solenoid. Perform the same procedures on this plug wire. Replace the transmission shift solenoid after determining it is bad.
Gear Shift Indicator
  • 1 Move the gear shift into the desired gear. Look at the gear labels and the arrow, or other indicator, to see if the gear shift indicator lines up with the selected gear.
  • 2 Move the gear lever to another gear and look to see if the indicator lines up with the selected gear. Misalignment of the arrow will tell you if there is a problem. Moving the gear shift to "neutral" but having the indicator show the transmission is in "drive" tells you the gear shift indicator is not working properly.
  • 3 Try each gear position to determine how much misalignment is in the indicator. Slide under the car and check for a loose gear shift cable. Check all the gear shift cable connections to ensure they are all tight and are not missing. Tighten any loose gear shift cable clamps or bolts. Replace the gear shift cable if you find that this is causing the misalignment with the gear shift indicator.

Posted on Feb 02, 2012

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1 Answer

91 240 Transmission issues


go to www.automecanico.com and translate this website and fix it.
God bless you

Jul 23, 2013 | Volvo 240 Cars & Trucks

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I have a 1999 Tiburon. Trans starts off in 2nd gear and goes to 3rd but will not go into overdrive.When starting cold though, it will shift 1,2&3. Also overdrive(4th gear) light will not come on.


I would check into the Trans oil temp sensor,they are known to keep the trans from shifting into 4th gear if they have a open or a shorted circuit...This may also be the culprit for the other issues you are experiencing when the trans is at diff temps and doing diff things....The other thing that is known for going bad in that Transaxle is the Sunshell...The splines on the inside of the sunshell strip out and than you will lose pretty much all forward gears,Except for 1st gear most likely and you will also lose Reverse if the Sunshell goes bad...But this will not act any different if the temperature is cold or hot

Apr 07, 2012 | Hyundai Motor 1999 Tiburon

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When shifting from 4th gear into overdrive, power is lost and it feels as though there's no gas being supplied. Can only drive in 4th gear, no higher.


At what speed are you shifting to overdrive? If it is below highway speed, then you are lugging the engine

Dec 26, 2010 | 1996 Ford Probe

1 Answer

My 96 jimmy studders and does not want to change to the 4th gear when in drive,when in overdrive it wont change to 5th gear(overdrive)will the tps sensor do that


Make sure the engine is running right, sometimes they wont shift if the engine is missing or losing vacuum. Sounds like the computer system is sensing there is not enough torque to shift into the higher gears so it is preventing it. This could be caused by your engine not running right under load, bad gas, bad plugs or something that is causing your engine to miss under load

Mar 01, 2010 | 1996 GMC Jimmy

1 Answer

1996 GMC Jimmy will not shift into overdrive.


4th gear failure is a common problem with this transmission, assuming it is an automatic. You should have the vehicle checked for codes by a qualified repair center with the proper scan tool. Also, check fluid level and condition. More often than not, the trans loses 3rd and 4th gear, as these are working off the same set of clutches. 3-4 clutches apply in 3rd, and when the 4th shift is made the 2-4 band applies giving you overdrive. If you have no engine braking in manual 3rd, you definitely have a mechanical failure, no 4th could be an electrical, or mechanical fault.

Nov 18, 2009 | 1996 GMC Jimmy

1 Answer

Have a 94 gmc 1500 4.3 automatic when i put it in drive it doesn't shift if i manuely shift from first to drive it will shift it doesn't have any slipping it also has overdrive that doesnt seem to work any...


Transmission does not shift automatically, only manually. Swap in a known-good PCM, check wiring, check other sensors such as VSS and TPS.

Trans shifts into gear harshly, car feels sluggish off the line
, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmision is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the underhood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode.

Car goes into gear but feels very sluggish like the brakes are dragging, but it will roll easily (starts out in 4th gear), you manually shift to 2 to get it moving, once it's moving you put it back in OD and the car shifts 3rd to 4th on its own and locks the converter at the appropriate time: ShiftB solenoid failed: Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Good luck and get back to me, hope this helps.

Nov 16, 2009 | 1994 GMC Sierra

1 Answer

91 VOLVO 240 WILL NOT SHIFT INTO 4TH GEAR. WHEN I PRESS THE 3RD GEAR BUTTON ON THE SHIFTER, THERE IS A CLICKING IN THE DASHBOARD


Your overdrive relay is bad,but its just as easy to bypass this relay,and never have this problem again IPB sales an bypass plate.5e0ce8b.jpg

Jun 29, 2009 | 1991 Volvo 240

2 Answers

95 GMC Sierra 4L60E will not shift down to 1st or up to 4th.


no power stuck in 3rd gear electric shop unless youve burnt it up good luck...www.TransmissionGarage.com

Jan 28, 2009 | 1995 GMC Sierra

2 Answers

2000 es300 lexus auto w overdrive button overdrive 4th gear not work


There isn't anything wrong with your car. This is perfectly normal. I have a 2000 ES300 as well as other people that I know and it operates in the same way. Overdrive doesn't mean the same thing for every car or transmission. In our case overdrive is simply a reference to the top gear which is 4th gear. When you switch overdrive off(which is depressing the button causing the O/D OFF dash light to illuminate,) the highest gear becomes 3rd because you turned 4th gear or overdrive off. The application scenario for this is usually mountainous terrain where a lot of uphill driving makes it more feasible not to up shift into 4th gear while ascending and descending. It will not switch back to overdrive or 4th gear until you re-engage it by turning the overdrive back on or repressing the button. Again, when the O/D OFF dash light is illuminated, overdrive which is 4th gear is off and the highest gear will then become 3rd. It will never shift into 4th gear while this light is illuminated or overdrive is off. When you press the button and the O/D OFF dash light is NOT illuminated overdrive is on and therefore it will shift into 4th gear as usual. This applies to all 97-2001 ES300's and probably any other car you drive tat exhibits this same type of change when overdrive is turned off.

Nov 20, 2008 | 2000 Lexus ES 300

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