Question about 2001 GMC Yukon

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TRANSMISSION DOSEN'T SHIFT AND THE OIL IS BRAND NEW, LEVEL IS GOOD. IS THERE ANY KIND OF ADJUSTMENT? IF I SHIFT MANUALLY TRANSMISSION WORK FINE..

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Hi,

*Assuming that the OD Switch on the stalk is off, the switch could be defected causing the OD circuit to be defeatured. This does happen!

*Overdrive circuit fuse is open.

*The overdrive switch circuit either open or shorted. Check the connectors at the transmission for corroded terminals.

*Incorrect outputs from the Distance or Coolant Sensors. A punky Distance Sensor can caused a weird collection of symptoms, including no 2-3 shift. If the coolant temperature sensor is bad you will not get a 2-3 shift. If this problem is recent to the winter weather, this should be a prime suspect.

*Incorrect output or intermittent output from the Throttle Position Sensor. On Dodge trucks the Throttle Position Sensor can cause all kinds of problems. Maybe even global warming!

*The Neutral Sense circuit to the PCM is open or shorted.

*The Overdrive Solenoid either shorted, open, or weak. On older 46REs the solenoid plungers became partially magnetized over time causing inoperation.

*The Overdrive Solenoid feed orfice is clogged in the valve body. A very common problem on vehicles that DID NOT receive a reqular transmission filter and fluid maintence.

*Low hydraulic pressure. This can be caused by a number of things, too. But before you suspect the pump I'll bet that the Anti-Drain Back valve in the transmission line is clogged. Some shops clean them, but I would recommend replacing it and changing out the fluid.

*Failed Overdrive Clutch. Unfortunately, this is somewhat common in earlier years, especially vehicles that towed heavy loads or were used in hilly country with the vehilce in overdrive.

*Failure of the Overdrive Piston Seal. Usually not a problem unless very high mileage or Dexron-Mercon fluid was used.

*Clogged Overdrive Check Valve. The result of dirty transmission fluid.

*If this transmission has been "overhauled" or "rebuilt" by an independent and they DID NOT use a Mopar transmission overhaul kit, it is very possible that Overdrive Piston has the incorrect spacer installed.

*PCM failure (the least likely).

Hope this helped.

Thanks for using " Fixya " and have a nice day!!

Posted on Jul 12, 2009

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Hi there I have a 1976 Chevy C20 pickup and I was wondering could low or to much fluid in the transmission make it hard or impossible to shift while its running it is a munci 4speed sm465


the level of oil in a manual transmission has little bearing in the shift operation of the transmission as all it does is lubricate the working parts
excessive oil will overload the input shaft seal and may cause oil getting to the clutch plate or leaking out of the drive shaft seal
However the quality of oil used will have a bearing on the shifting of the gears
If the oil is too heavy ( viscosity above 80 oep) it affects the ability of the synchro mechanisms to work especially in fast shifting requirements
if it is too low ( 30 or less) it affects the wear or the gears and bearings and again will not have the shear strength to allow the synchros to engage properly with out causing excessive wear
From your question and problem description, I suspect that the problem is not in the transmission or oil level but in the clutch operation
If the clutch plate is not properly disengaging, the engine revolutions will not allow the synchros of the gears to operate properly and make shifting near impossible
so check the oil used and the level and fill to the level specified by the manufacturer
check and adjust the clutch for correct operation as there may be a problem in the slave cylinder/ master cylinder / cable operation that is not allowing complete disengagement of the cluch

Sep 01, 2016 | Cars & Trucks

3 Answers

What causes my 1995 chevy pick up 5 speed manual transmission to not want to shift into gears after it gets warm or hot but first thing it does fine


Many internal parts could be the problem. I would replace the vacuum modulator on the passenger side of the transmission first. Near the back. Only thing with a vacuum hose to it.

Aug 09, 2015 | Cars & Trucks

2 Answers

What would cause the transmission to all of a sudden slip?


You don't say auto or manual shift so it could be oil level low in auto box . if manual shift clutch plate worn out or adjustment of cylinder

Mar 07, 2015 | Cars & Trucks

1 Answer

Went for ride yesterday drove good parked then in the morning warmed it up and it wont shift in any geer


check transmission fluid level.if transmission fluid level okay have vechicle code scan look for faulty transmission fluid pressure switch or faulty transmission range switch.faulty transmission control module.if all is good make sure transmission manual shift linkage not out of adjustment or shift cable broken if all is good possible transmission just failed.

Feb 07, 2013 | 2000 Oldsmobile Silhouette

1 Answer

How many qts of oil do i need


Depends on your engine.

1980 JEEP CJ-7 2.5L 4-cyl Engine Code [B]
CAPACITIES
Engine, GM without filter..........2.4 quarts[1]
Wix Filter ........ 51040
Cooling System, Initial Fill..........8.0 quarts
Automatic Transmission, A904, 30RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, A999, 32RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, Total Fill
3 speed A999, 32RH..........8.4 quarts
3 speed A904, 30RH..........7.0 quarts
Manual Transmission, 4-SPD, SR-4..........3.0 pints
Manual Transmission, 4-SPD, T176..........3.6 pints
Differential, Front..........2.5 pints[3]
Differential, Rear..........4.9 pints
Transfer Case,..........4.0 pints

1. Add extra oil when replacing filter. After refill check oil level.
2. With engine automatic transmission operating temperature, shift through all gears.
Check fluid level in NEUTRAL and add fluid as needed.
3. 1984-1992 Models with command-Track, add 5 oz of 75W-90 GL-5 to shift motor housing opening.

TORQUES
Oil Drain Plug.....25 ft-lbs
Manual Transmission T176
Fill Plug.....15 ft-lbs
Drain Plug.....15 ft-lbs
Manual Transmission SR4
Fill Plug.....20 ft-lbs

1980 JEEP CJ-7 4.2L 6-cyl Engine Code [C]
CAPACITIES
Engine, without filter..........5.0 quarts[1]
Wix Filter..... 51522
Cooling System, Initial Fill..........11.0 quarts
Automatic Transmission, A904, 30RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, A999, 32RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, Total Fill
3 speed A999, 32RH..........8.4 quarts
3 speed A904, 30RH..........7.0 quarts
Manual Transmission, 4-SPD, SR-4..........3.0 pints
Manual Transmission, 4-SPD, T176..........3.6 pints
Differential, Front..........2.5 pints[3]
Differential, Rear..........4.9 pints
Transfer Case,..........4.0 pints

1. Add extra oil when replacing filter. After refill check oil level.
2. With engine automatic transmission operating temperature, shift through all gears.
Check fluid level in NEUTRAL and add fluid as needed.
3. 1984-1992 Models with command-Track, add 5 oz of 75W-90 GL-5 to shift motor housing opening.

TORQUES
Oil Drain Plug.....30 ft-lbs
Manual Transmission T176
Fill Plug.....15 ft-lbs
Drain Plug.....15 ft-lbs
Manual Transmission SR4
Fill Plug.....20 ft-lbs

1980 JEEP CJ-7 5.0L 8-cyl Engine Code [H]
CAPACITIES

Engine, without filter..........4.0 quarts[1]
Wix Filter..... 51258
Cooling System, Initial Fill..........13.0 quarts
Automatic Transmission, A999, 32RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, A904, 30RH Initial Fill..........4.0 quarts[2]
Automatic Transmission, Total Fill
3 speed A904, 30RH..........7.0 quarts
3 speed A999, 32RH..........8.4 quarts
Manual Transmission, 4-SPD, SR-4..........3.0 pints
Manual Transmission, 4-SPD, T176..........3.6 pints
Differential, Front..........2.5 pints[3]
Differential, Rear..........4.9 pints
Transfer Case,..........4.0 pints

1. Add extra oil when replacing filter. After refill check oil level.
2. With engine automatic transmission operating temperature, shift through all gears.
Check fluid level in NEUTRAL and add fluid as needed.
3. 1984-1992 Models with command-Track, add 5 oz of 75W-90 GL-5 to shift motor housing opening.

TORQUES
Manual Transmission T176
Fill Plug.....15 ft-lbs
Drain Plug.....15 ft-lbs
Manual Transmission SR4
Fill Plug.....20 ft-lbs

Oilman

Feb 02, 2013 | 1984 Jeep CJ7

1 Answer

How do I add manual transmission fluid to my transmission?


on manual transmissions most have a threaded plug to one side of the gearbox that is removeable with a socket rachet or a square plug removeable with a simple adjustable wrench.. the level is usually up to the bottom of this plug( pump 90wt gear oil in until the liquid(syrumpy)runs back out some..also rock the car back and forth on level ground and work the shifter(do not force hard as the shift finger can break.. good luck..repost findings..(also can be done at an oilchange place..)

Jan 27, 2013 | 2008 Hyundai Accent

2 Answers

Slow to shift into 1st gear


Check your transmission fluid level. If you haven't changed the fluid recently, change it now to see if there is some blockage in the veins of the transmission.

Jan 05, 2013 | 2003 Cadillac Escalade Ext

1 Answer

Trans slipping


CHECK TRANSMISSION FLUID LEVEL.MAKE SURE FLUID LEVEL NOT LOW.IF FLUID LEVEL OKAY BUT TRANSMISSION FLUID LOOK DARK HAS BURNT SMELL CHANGE TRANSMISSION FILTER + FLUID.IF FLUID AND FILTER HAS BEEN CHANGED YOU HAVE THE RIGHT AMOUNT FLUID IN TRANSMISSION AND MANUAL SHIFT LINKAGES PROPER ADJUSTED.CHECK TRANSMISSION FUSE AND SCAN FOR PRESSURE CONTROL SOLENOID VALVE MALFUNCTION FAULT.IF ALL IS GOOD HAVE TRANSMISSION OIL PUMP PRESSURE TEST.YOUR PUMP COULD BE FAULTY OR YOU HAVE WORN LOW ROLLER CLUTCH AND WORN FORWARD CLUTCH PLATES AND LEAKING FORWARD CLUTCH PISTON SEALS.

Jul 10, 2010 | 1999 Oldsmobile Alero

1 Answer

Truck all of a sudden will not move when in drive or reverse, could a vacuum line or something similar be loose?


SCAN IT FIRST TO SEE IF YOU HAVE ANY TRANSMISSION CODE FAULTS.IF ALL IS GOOD.CHECK TRANSMISSION FLUID LEVEL.IF YOUR TRUCK HAS 100000 MILES ON IT HAVE TRANSMISSION FLUID + FILTER CHANGED AND THE BANDS ADJUSTED.ALSO HAVE MANUAL SHIFT CABLE ADJUSTMENT CHECKED.IF ALL IS GOOD YOUR TRANSMISSION FORWARD CLUTCH OR INPUT GEAR OR OIL PUMP FAULTY.

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