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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old January 19th, 2012, 15:53   #1
Combine17
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Default Transmission Speed Sensor GEAR???

Im in the process of replacing my speed sensor.

turns out there is a gear inside the transmission? But it looks broken to me!

I tried google for answers but cant find anything...can anyone confirm that if its broken.

Here is the picture. Its the left side (near the gear) i think the whole rod is suppose to be bigger because when i look inside the transmission hole where the rod was i think i i see another piece...plus the end of the rod seems to be broken off (near the gear)



Can i get this new part from somewhere....where do i go from here? :S
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Old January 19th, 2012, 16:53   #2
AndyBees
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Based on the two I have laying on the shelf, looks like you got it all out! Not broken!

Why did you have to remove it?
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Old January 19th, 2012, 18:11   #3
rt_hawk
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I just replaced my VSS too and it does look broken to me. Mine had aproximatley an extra inch on yours. Dealer would be the best bet to get the bottom piece for the VSS. If you have an auto that sensor (g68 I think) just runs the speedo and cruise, so it won't effect shift points or driveability. Good luck!
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Old January 19th, 2012, 18:42   #4
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Maybe autos are different??
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Old January 19th, 2012, 21:56   #5
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what does VSS stand for?

so is it broken or no? and it came unscewed while i was replacing my speed sensor...so i took it out to see what it is and thats what i found....anyone know the part number or cost? idparts doesnt have it

car is 2001 Jetta TDI, 5 Speed
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Old January 19th, 2012, 23:35   #6
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VSS - Vehicle speed sensor, I think it's broke... there should be a taper on the end of the shaft you use to check the fluid level in the differential...I'd just take it to the dealer, they can get the part number and part.
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Old January 19th, 2012, 23:38   #7
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I'd see if it works with the new speed sensor, if it does throw some black rtv on the threads, to prevent differential leaks, and call it good.
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Old January 20th, 2012, 03:45   #8
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Well, if part of it is still in the tranny, the new one will not screw all the way down!
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Old January 20th, 2012, 05:00   #9
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Thats the thing...i cant tell if its floating around in the tranny or of its just sitting there...its screws all the way down.

but the real reason why i changed the speed sensor was because of "slow down shudder" When i had it unplugged the slow down shudder didnt happen. Now when its plugged in it still happens.

So i dont get it...does it have to do something with the broken gear end? or a blown fuse maybe?
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Old January 20th, 2012, 05:05   #10
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also i had my injection quantity changed before...it was good for about half hour..then i shut off the car and let it sit for another half hour....started it up and the quantity jumped back to the original posistion it was at (when it was shuddering) i believe it was at 1. and i changed it to 3.
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Old January 20th, 2012, 06:22   #11
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Wadaya mean by bigger? Longer?

Take a picher that shows the end better where you think it's broken. It looks ok to me.

Except the oil. Looks nasty.
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Old January 20th, 2012, 08:27   #12
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Like this...http://i1140.photobucket.com/albums/...0/2648273b.jpg

The manual one may be different, the one in the pic is for a 01m, the taper is used to check the fluid level.
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-06 Jetta TDI GLS DSG, 100k, DIY zerostart heater, tune and egr delete soon...

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Old January 20th, 2012, 10:45   #13
Combine17
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so most likely mine is broken....would that have any effect on "slow down shudder" ....like i said when my speed sensor was disconnected i didn't have a slow down shudder problem.
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Old January 20th, 2012, 14:15   #14
rt_hawk
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Slow down shudder is caused by injection quantity being off, should be between 3 and 5 mg. Go to TDI 101, go to the how to's and look up hammer mod. You need vag com to do it, your IQ can only be adjusted so much electronically, your pump probably needs a physical adjustment.
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-08 F-250 6.4 CCSB, dpf-del., h&s, DIY-CAI, diy egr delete & coolant bypass.
-06 Jetta TDI GLS DSG, 100k, DIY zerostart heater, tune and egr delete soon...

Last edited by rt_hawk; January 20th, 2012 at 20:45. Reason: Dumb, can't spell
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Old January 20th, 2012, 18:38   #15
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Quote:
Originally Posted by rt_hawk View Post
Like this...http://i1140.photobucket.com/albums/...0/2648273b.jpg

The manual one may be different, the one in the pic is for a 01m, the taper is used to check the fluid level.

Its to check the "differential oil" which is separate from the transmission fluid in the 01M Automatic! (per the Bentley)

I just checked the two VSSes in my stock. One of them is obviously from an automatic because the part past the gear is just a little over 1.5 inches long and does have the smaller end for checking the differential oil level.

The other VSS between the gear area and the threaded area is shorter. I do know it come from a 5-speed. However, I cannot elaborate on the gear and beyond because I have cut that part off for custom use in my conversion project.
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300k mile mark on 12/28/11
451 fill-ups, in Excel spreadsheet, 341k miles...
'84 Vanagon ALH TDI engine (32 mpg) Malone Stage 1 tune, Polaris Diesel ATV, Allegro Bay RV 5.9 cummins, VWs 41 years, VW diesels 34 years, ALH TDIs 12 years
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