Question about 1989 GMC Suburban

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Where is the VSS (vehicle speed sensor)? OBD gives me #24

Tranny has only one wiring connector for the lockup torque converter, tailshaft at rear of transfer case has only mech speedo cable .speedometer is aok as verified by police radar.....where the hell is this VSS?

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  • addisu Mar 27, 2009

    I get the same OBD #24 ,it happens when i get off the gas pedal ,because i dont know where to find vss,help if u can thanks.


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Hello! On 94 and earlier models it is located behind the glove box or close to the ECM. Cheers! Ryan

Posted on Jun 11, 2009

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Im getting ready to pull the transmission out of my 95 isuzu trooper with the 3.2l engine 4x4. Im not to smart about the inside of them, does the 4L30e have tranny bolts th hold the housing to tranny

why not login in to mitchell DIY, (goggle it ) and read.
or go to any online, 4L30 parts house and read.
lots of those, can all found easy using "GOOGLE"
search, (4L30 parts)
3rd hit MAKCO
see the graphic there, click it.

you need to remove the TC, bolts first
the bell housings bolts to the engine,
those come off, with tranny jack in place.
all the steps are in the service manual.
quote (a wall of text, why not buy the book?)

& Transfer Case Automatic Transmission Transmission Removal 4L30-E Transmission

4L30-E Transmission(removal

4L30-E Transmission
Disengage the oxygen sensor connector from the transmission wiring harness connector

Disengage the oxygen sensor connector from the transmission wiring harness connector
Detach the selector lever end of the shift lock cable from the lever assembly by loosening the adjusting nuts and sliding the end out of the bracket

Detach the selector lever end of the shift lock cable from the lever assembly by loosening the adjusting nuts and sliding the end out of the bracket

Disconnect the shift control rod from the selector lever lower lever arm

Disconnect the shift control rod from the selector lever lower lever arm

Remove the oil pipe clamp bracket from the engine stiffener

Remove the oil pipe clamp bracket from the engine stiffener
Make certain to tighten the transmission-to-engine mounting bolts to the proper amount of torque-the torque measurements are shown in parentheses

Make certain to tighten the transmission-to-engine mounting bolts to the proper amount of torque-the torque measurements are shown in parentheses


The transfer case is an integral part of the transmission housing. Although the 2 cases can be separated, the transfer case should be removed with the transmission.

Use a felt-tipped marker to matchmark the hood to the hood hinges. Remove the hood.

Disconnect the negative battery cable.

Shift the transmission into the N position, and the transfer case into the 2H position.

Remove the air cleaner assembly.

Remove the transfer case shift knob. Remove the 4 transmission cover console retaining screws.

Remove the center console assembly and disengage the console switch wiring connectors.

Disconnect the shift lock cable and the shift control rod from the selector lever assembly.

Unbolt and remove the transfer case control lever.

Raise and safely support the vehicle on jackstands.

Remove the transmission and transfer case skid plates.

Remove the exhaust pipe protectors.

Drain the transmission fluid. For more information servicing the transmission fluid pan and filter, refer to Section 1.

Label and detach the oxygen sensor connectors.

Remove the catalytic converter, center exhaust pipe and front exhaust pipe, as described in Section 3.

Matchmark the front and rear driveshafts to the differential and transfer case flanges.

Unbolt and remove the front and rear driveshafts, as described later in this section.

Disconnect the oil cooler lines from the transmission. Plug the lines to prevent fluid loss and contamination.

Remove the brackets securing the oil cooler lines to the engine stiffener.

Remove the front suspension crossmember.

Remove the dipstick and tube. Disconnect the breather hoses from the tube.

Remove the 5 engine stiffener bracket bolts and the stiffener bracket.

Remove the heat protector.

Disengage the transmission harness connectors and the mode switch harness connector from the engine harness.

Disconnect the harness clamp from the clamp bracket.

Disconnect the ground cable from the engine.

Remove the starter motor, as described in Section 2.

Remove the flexplate inspection cover.

Remove the 3 bolts securing the flexplate to the torque converter. Turn the crankshaft to gain access to all 3 bolts.


Remove the radiator upper fan shroud and the cooling fan to access the crankshaft center bolt to turn the crankshaft.

Place a suitable transmission jack under the transmission and transfer case unit for support.

Raise the transmission slightly and remove the 8 bolts securing the rear mount and the transmission crossmember.


Make sure the engine and transmission assembly is properly supported before removing the rear mount and third crossmember.

Raise the engine slightly with an engine hoist and remove the transmission-to-engine bolts.

Separate the transmission from the engine and lower the transmission from the vehicle.
end removal quote

Mar 04, 2017 | Isuzu Trooper Cars & Trucks

1 Answer

2002 chevy 2500 hd 4l80e in limp mode at startup can reset and drive after disconnecting battery.

There is video on how to repair the worn transfer case
& install a case saver

Need to start by looking at scan tool data on engine first
& it's sensors,then the other modules for trans,etc

Very few transmissions last over ten years,SO !!

Mar 03, 2014 | Chevrolet 2500 Cars & Trucks

1 Answer

Hoe to replace

the shifter cable (not TV kick down)
you detact it from the shifter (removed)
the detach it from the tranny.
it has 2 ends, detach them.
of never done a cable change on anything or on A/T
the RTM read the manual, read the FSM (Suz)
or loging to and read that there.
the odd thing, ive never seen one fail, way do you think its bad, collision damage?
here is a quote from the pull tranny page, it might help
but most books (cept a real FSM)
do not cover , the minor steps , they are basics
Transmission Removal & Installation
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Drain the transfer case oil, if equipped.
  3. Remove or disconnect the following:
    • Negative battery cable
    • Center console and transfer case shift lever, if equipped
    • Transmission dipstick tube
    • Transmission wiring harness connectors
    • Starter motor
    • Front driveshaft, if equipped
    • Rear driveshaft
    • Gear select cable and bracket
    • Throttle Valve (TV) cable, if equipped
    • Exhaust front pipe
    • Transmission oil cooler lines
    • Transmission brace
    • Flywheel access cover
    • Torque converter
    • Speedometer cable, if equipped
    • Vehicle Speed (VSS) sensor connector, if equipped
    • Transmission flange bolts and nuts
    • Transmission braces, if equipped
  4. Support the transmission with a jack and remove the transmission mount and crossmember.
  5. Place a wooden block at the rear of the cylinder head as shown to support the engine when the transmission is removed.
  6. Lower the transmission away from the vehicle.

Dec 13, 2013 | 2001 Suzuki Grand Vitara

2 Answers

Speedo 95 yj conversion 350 with 350 turbo trans and np231 transfer case 3.73 gears 33" tires wires cut off at transfer case and there is no speedo cable what do i need to get my speedo working

The vehicle speed sensor is located in the transfer case housing. To get your speedometer working you will have to connect the wires back to the speed sensor.

Nov 02, 2011 | 1990 Jeep Wrangler

2 Answers

Where is speedometer cable located on transmisson


Dec 19, 2010 | 1999 Chevrolet Blazer

1 Answer

My 98 Dodge Ram 4x4 has a check engine light and ABS light on in the dash and the speedometer stopped working completely. . .it has also stalled. . . Azone says it is the vehicle speed sensor(Duralast Part...

be sure and check the wiring harness on the frame by the rear differential lots of problems with these.the tailshaft is where the driveshaft hooks upon a 4x4 then it is in front of the transfer case.

Mar 06, 2010 | 2001 Dodge Ram 3500 Truck

1 Answer

P0743 is the code i got

It means the PCM (the brain) doesn't sense any current in the circuit for 'torque converter lockup'. This 'lockup' would happen when you are in high gear and going above about 45 mph. It could be a connector is loose, a wire broken, or shorted. Its not easy to poke around in the wiring harnesses going to the transmission - but if you can, wiggle and reseat each connector. Also wiggle and push in on the connectors going into the PCM next to the battery. Make sure they are fully 'clipped on'. There is probably a connector inside the transmission too - but its not reachable without dismantling things, and its unlikely it would fail. There is a computer controlled solenoid inside the tranny, which is what causes the torque conveter to lockup.
On the bright side, if your torque converter is not locking up - you can drive the car indefinitely that way. Your MPG will suffer a few percent - maybe 5%-7%. But it wont hurt the car.

Feb 22, 2010 | 2000 Dodge Neon

1 Answer

I have a 1992 jeep wrangler and my promblem is my speedometer isnt working but my tachometer is what should i look for

Your tach still works because it reads engine rpm. The computer uses info from the speedometer but the signals for the tach and speedometer come from different places.
I can't remember if your speedometer is cable driven or electric but the sender is on the drivers side rear of the transfer case output tailshaft housing. If cable driven check that the cable isn't broken inside (I usually put an electric drill on the cable and run the drill to see if the speedometer works (some run backwards) If the drill is able to make the speedometer work check the gear that is inside the transmission by removing the part the cable is attached to. That drives the cable. If electric, check wiring and if OK, replace the sending unit.

Jan 14, 2010 | 1992 Jeep Wrangler

1 Answer

Pictures of removing gearbox and transfer case from vehicle

The catalytic converter is located beside the transfer case. Be careful when working around the catalytic converter because of the extremely high temperatures generated by the converter.
  1. Disconnect the negative battery cable.
  2. Raise the vehicle and support it safely.
  3. If so equipped, remove the skid plate from frame.
  4. Drain the transfer case.
  5. Remove the damper from the transfer case, if so equipped.
  6. On electronic shift models, remove the wire connector from the feed wire harness at the rear of the transfer case. Be sure to squeeze the locking tabs, then pull the connectors apart.
  7. Disconnect the front driveshaft from the axle input yoke.
  8. If equipped, loosen the clamp retaining the front driveshaft boot to the transfer case, and pull the driveshaft and front boot assembly out of the transfer case front output shaft.
  9. Disconnect the rear driveshaft from the transfer case output shaft yoke.
  10. If equipped, disconnect the speedometer driven gear from the transfer case rear cover.
  11. If equipped, disconnect the electrical wire harness plug from the Vehicle Speed Sensor (VSS).
  12. Disconnect the vent hose from the mounting bracket.
  13. On manual shift models, perform the following:
    1. Remove the shift lever retaining nut and remove the lever.
    2. Remove the bolts that retains the shifter to the extension housing. Note the size and location of the bolts to aid during installation. Remove the lever assembly and bushing.
  14. If equipped, remove the heat shield from the transfer case.
  15. Support the transfer case with a transmission jack.
  16. Remove the mounting bolts retaining the transfer case to the transmission.
  17. Slide the transfer case rearward off the transmission output shaft and lower the transfer case from the vehicle. Remove the gasket or any old sealer from between the transfer case and the transmission.

Mar 29, 2009 | 1988 Mazda B2600 Cab Plus

2 Answers

Removing tranny

This is the prosses to remove and install your Transmission.

1---Disconnect negative Battery cable. Remove Air cleaner. Disconnect shift cable from Transmission. Raise and support Vehicle. Drain Transmission fluid. Disconnect shift Linkage. Mark rear drive shaft for installation reference and fremove from vehicle. Mark front drive shaft and Remove from transfer case.
Warning.. ALWAYS relieve fuel pressure before disconnecting any fuel injection related component DO NOT allow fuel to contact electrical components.

2-- Relieve fuel pressure, and remove fuel lines from the Bracket support at catalistyc converter
And remove the bracket. support transmission with transmission jack or any compatible.
Remove transmission crossmember.
NOTE .. DO NOT stretch or damage any cables, wires or other components when lowering transmission.

3-- Lower transmission far enough to provide clearence for other components. remove dipstick tube and seal. cover opening in transmission. remove speedometer harness. remove electrical connectors from transmission. remove cooler lines, and cap all openings. remove starter motor.

4-- Remove transfer case shifter and move it aside, Remove transmission support braces. Note braces locatoin for installation. Remove converter housing cover. Mark flexplate( flywhell) and Torque converter for alingment during installation, Remove flywheel to torque converter BOLTS.

Remove transmission to Engine BOLTS. note location of any brackets or clips and move them aside. Slide transmission straight back, off locating pins, remove transmission from vehicle.

6-- To install, reverse removal procedure. Torque converter must be against flywheel and rotate
FREELY by HAND, ensure all reference mark aling. and tighten all BOLTS..

NOTE. In some cases is nessesary remove the Transfer case before the transmission.
The transfer case is attached at the transmission with six Bolt .....

OK... I hope this help on your question.
Thank yuo for use fixya...

Oct 01, 2008 | 1996 Chevrolet Suburban

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