We have a vw beetle automatic 1999. it is an american import, and we have a problem that the speedo does not increment. i have changed the speed sensor and the spline that goes into the gearbox, it must be somthing inside the differiential. could you help please with details of how to fix this fault. kindest regards dean

Question edited for clarity.
Question moved to correct year make model category.

Don't get confused with the Vehicle Speed Sensor. That reports to your speedo via the ECM. Take a look at the video. This looks like the part, just $233!

https://parts.vw.com/p/Volkswagen_2007_Beetle/Vehicle-Speed-Sensor/48030620/09G927321B.html

Video
PREVIEW
7:48 New Beetle: How To Replace Gearbox Speed Sensor (G38)
YouTube · NewBeetlePR

you can get guide from many sites.. i know few
error codes/ fault codes, wiring diagrams, schematic diagrams, torque specs, engine info, switches functioning, assemble, disassembly, complete refurbish, repair, installation every single thing is covered
within seconds u can get the access and it's totally illustrative complete

right on tranny

On the back side of the transmission, left side. It will have a wire connector attached. All black in color.
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its a transmission speed sensor or input turbine speed sensor . the sensor cant read the speed and makes it stall out.

Please select one of the following:

• Transmission model 01M
• Transmission model 09G

Transmission Fluid Type/Capacity 159920
Application:
With automatic transmission
Transmission model 01M

Note :
01M transmissionPennzoil Multi Vehicle ATF


28901
Application:
With automatic transmission
Transmission model 01M

Note :
01M transmissionCoastal Multi-Vehicle Syn Blend / Mercon V ATF


It depends on what transmission you have an 01M or 09G.
Application:
With automatic transmission

• Transmission model 01M
• Transmission model 09G

Transmission Fluid Type/Capacity 06814
Application:
With automatic transmission
Transmission model 09G

Note :
09G transmissionCastrol Import Multi Vehicle ATF


324
Application:
With automatic transmission
Transmission model 09G

Note :
09G transmissionValvoline Maxlife Dex/Merc ATF



Application:
With automatic transmission
Transmission model 09G

Note :
09G transmissionService change only - 4.8 quarts.

Total refill - 7.4 quarts.


10418
Application:
With automatic transmission
Transmission model 09G

Note :
09G transmissionLucas Semi-Synthetic Multi Vehicle ATF


Transmission model 01M

Note :
01M transmissionTotal refill - 5.6 quarts

check speedo meter sender . on gear box exactly on difren. between two drive shaft some coming mechanical ( small gear plastic ) remove cable and rotat littil colck and unti look to gage if moving the problem gear .if not the cable speedometer , some time when you remove it will come out tha means cable need replace . if electric replace speed sender same place .

NOT REALLY FOR SURE BUT I THINK IT HAS A SPEED SENSOR EITHER ON THE WHEEL OR LOCATED ON THE TRANSMISSION I WOULD CHECK THOSE AREAS.

See if the battery can be changed