Jump to content


Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse
 

Photo
- - - - -

What year did they change VSS type?


  • Please log in to reply
8 replies to this topic

#1 dssenne

dssenne

    USMB Regular

  • Members
  • PipPipPip
  • 61 posts
  • O'Fallon

Posted 28 December 2006 - 02:30 PM

I have a '92 Legacy w/auto trans. It has the mechanical speedometer with cable running to the transmission. When the plastic gear in the transmission failed my speedometer died. Apparently the only way to replace this gear is to pull the transmission (told this by two dealer mechanics). I think having to do this is an incredibly poor design.
I recently had to pull the VSS in my Nissan 200sx and it was a piece of cake(one bolt holding it in, then pull right out).
What year did Subaru change from a mechanical to electrical VSS?
On later models can the VSS be removed without dropping the trans. like on my Nissan?
Since this is an older/high mileage car I opted for using a GPS unit as a speedometer. Not perfect, but seemed to be the best of a bad situation.

#2 nipper

nipper

    Semi Elite Master of the

  • Members
  • 17,637 posts
  • Long Island NY

Posted 28 December 2006 - 04:34 PM

I have a '92 Legacy w/auto trans. It has the mechanical speedometer with cable running to the transmission. When the plastic gear in the transmission failed my speedometer died. Apparently the only way to replace this gear is to pull the transmission (told this by two dealer mechanics). I think having to do this is an incredibly poor design.
I recently had to pull the VSS in my Nissan 200sx and it was a piece of cake(one bolt holding it in, then pull right out).
What year did Subaru change from a mechanical to electrical VSS?
On later models can the VSS be removed without dropping the trans. like on my Nissan?
Since this is an older/high mileage car I opted for using a GPS unit as a speedometer. Not perfect, but seemed to be the best of a bad situation.


Thats a common design for cable driven spedos, as it is not that often the gear goes bad. Its the same for most automatics since the begning of time (or at least 1938).
The VSS started coming about in 1995, and was completly switched over in 1996.

nipper

#3 Skip

Skip

    Flatuous Blather

  • Moderator
  • 8,991 posts
  • Latrobe, Pennsylvania

Posted 28 December 2006 - 05:44 PM

My 97 OB has an electric VSS and it lso has a bad gear in the diff.

You are correct, pretty bad design, with OBD II - I can't get it inspected because of the bad gear.

ECU and TCU use it's output.

Max bummer indeed.

#4 Legacy777

Legacy777

    Moderator

  • Moderator
  • 12,652 posts
  • Houston, Tx

Posted 28 December 2006 - 06:02 PM

The gear is still there.....it's just whether the speedometer uses a cable to an electronic head in the speedometer, or an electrical pickup at the transmission.

#5 dssenne

dssenne

    USMB Regular

  • Members
  • PipPipPip
  • 61 posts
  • O'Fallon

Posted 28 December 2006 - 09:59 PM

The gear is still there.....it's just whether the speedometer uses a cable to an electronic head in the speedometer, or an electrical pickup at the transmission.


Right, but as I said, on my Nissan the sensor? with the plastic gear that fits into the trans. just pulled right out. Don't know why Subaru didn't make theirs as easy (inexpensive) to replace.

#6 johnceggleston

johnceggleston

    Lite Master of the Subaru

  • Gold Subscribers
  • 6,403 posts
  • Virginia

Posted 29 December 2006 - 07:12 AM

Right, but as I said, on my Nissan the sensor? with the plastic gear that fits into the trans. just pulled right out. Don't know why Subaru didn't make theirs as easy (inexpensive) to replace.


yes , the sensor with the plastic gear fits into the trans, b ut what drives the plastic gear. probably another plastic gear that you have to open the transmission to replace. maybe not, i don't know trannys. but i would think a metal gear on a plastic one wouldn't last long, but what do i know.

#7 nipper

nipper

    Semi Elite Master of the

  • Members
  • 17,637 posts
  • Long Island NY

Posted 29 December 2006 - 11:27 AM

yes , the sensor with the plastic gear fits into the trans, b ut what drives the plastic gear. probably another plastic gear that you have to open the transmission to replace. maybe not, i don't know trannys. but i would think a metal gear on a plastic one wouldn't last long, but what do i know.


Technically its a nylon gear and they are fairly durable. What makes them go bad is when wahtever they are driving starts to seize up.

nipper

#8 Skip

Skip

    Flatuous Blather

  • Moderator
  • 8,991 posts
  • Latrobe, Pennsylvania

Posted 29 December 2006 - 12:00 PM

nylon,krylon
The VSS on mine is just a Hall effect device, read very easy to turn,
imagine a speedo cable needing lubed?

I believe in my case the small connection link
(thin stamped metal tang) broke and this jam
caused the nylon gear to strip.

No matter, it is a shame to have to pull the tranny and
open and strip the diff to service this part.

If FHI is so smart -- why not put the metal gear
on the diff output and the nylon on an
externally replaceable shaft?

As it is, the metal gear which is on the shaft that turns the VSS, it has to be removed from the diff
internal section even before changing the nylon gear
which is on the output shaft.
Posted Image
Again dumb idea for a device so important to the correct operation of a vehicle.

I own over a dozen Subarus and this has to be one of the worst cases of under engineering I have experienced.

Happy New Year


#9 OB99W

OB99W

    Elite Master of the Subaru

  • Members
  • 3,315 posts
  • Ithaca

Posted 29 December 2006 - 05:46 PM

Posted Image

Happy New Year

Nicely centered gear contact patches. :)

So, does Flatuous Blather = All_Talk ? (For that matter, does "flatuous" = "fatuous"?) ;)

Happy New Year to you, too. :burnout:




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users