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Second Generation Legend (1991-1995)

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Old 02-27-08, 07:06 PM   #1 (permalink)
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Can the vss sensor cause the transmission to shift funny?

Can a bad vss sensor cause the transmission to shift funny?
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Old 02-27-08, 07:27 PM   #2 (permalink)
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I believe the TCU controls shifting of transmission through rpms and level of pedal travel, I am not sure whether it is dependent on speed, someone else who knows more about the mechanics of our legend can chime in...
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Old 02-27-08, 07:39 PM   #3 (permalink)
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I don't think so. I remember a mechanic left mine unplugged and my car ran the same. The only problem I had was with the idle.
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Old 02-27-08, 10:16 PM   #4 (permalink)
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Past threads here have suggested yes... to the point that it can actually damage the transmission.
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Old 02-27-08, 10:30 PM   #5 (permalink)
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When mine went last summer, i couldnt shift into 3rd gear or higher because it caused the ecu to become confused. This was in my 93 Coupe 6 speed LS
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Old 02-28-08, 09:57 PM   #6 (permalink)
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D4 dash light cluster is the significant alert. There are many previous posts
about the issue. The VSS is a minor repair; the tranny is a bigger issue.
My Acuras are manual 5 speeds; they are not vulnerable to VSS/tranny
problems. Either DIY the VSS($85.00,)or pay a mechanic/dealer ($400.00?)
Procrastinating increases the costs, because of the transmission problems
resulting from faulty VSS input. Other, automatic trans. owners may have better insight/recommendations. Search the D4/VSS subject and keep
posting for more definitive "how to" advice. you can do the VSS DIY if you
are so inclined. (Search.) Good luck.
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Old 02-29-08, 11:17 PM   #7 (permalink)
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i had the same problem and when i changed it my cruisecontroll stopped working
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Old 02-29-08, 11:35 PM   #8 (permalink)
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Yes, a damaged VSS can cause damage to the tranny due to improper shifting patterns. I don't remember the legends having a seperate TCU.
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Old 03-01-08, 12:01 AM   #9 (permalink)
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Another issue is that our Tranny's have Electronic Shifting - if there is a alternator, battery, starter or other issue that might affect the electrics, then that may be where your problem is.

When my alternater was going bad and would act up, the tranny had problems shifting between the gears.
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Old 03-01-08, 12:08 AM   #10 (permalink)
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The VSS is one of the 30 or so inputs that help control a transmission. Thats why they are so hard to pinpoint, and tranny techs make a fortune in diagnostic time. All the inputs in turn must have the output, so it can affect performance.
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Old 03-01-08, 12:35 AM   #11 (permalink)
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well dam I used to run about a year and half before i replace it and every thing went fine to me. 5spd MT lol.
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Old 03-01-08, 08:43 AM   #12 (permalink)
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Quote:
Originally Posted by NYCOWNSU View Post
Yes, a damaged VSS can cause damage to the tranny due to improper shifting patterns. I don't remember the legends having a seperate TCU.
There isn't a "separate" TCU but there is a daughter board in the ECU for the auto transmissions for those cars equiped.

Quote:
Originally Posted by truonghthe View Post
well dam I used to run about a year and half before i replace it and every thing went fine to me. 5spd MT lol.
The 5MTs don't seem to have as many issues with it... but VSS failure also seems to be one of those problems that has a huge range of symptoms.


Just to light the spark... I replaced the VSS in my BMW a few months ago (speedo just falls to zero in that car when it goes)... $27 in parts and 2 bolts later and I was back up and running. Seriously, it took like 10 minutes to fix. I was very mad at the japanese that day.
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Old 03-01-08, 11:31 AM   #13 (permalink)
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Quote:
Originally Posted by antik View Post
Just to light the spark... I replaced the VSS in my BMW a few months ago (speedo just falls to zero in that car when it goes)... $27 in parts and 2 bolts later and I was back up and running. Seriously, it took like 10 minutes to fix. I was very mad at the japanese that day.
Why were you mad at the Japanese? I think it took me a total of about 45 minutes only because I had to remove and replace the bottom dust cover. Once it was off replacing the VSS was very simple.

As for it causing problems with shifting, I never experienced that. I'm not saying it can't but I picked up my car with an intermittent VSS and drove it over 500 miles home. I then went probably another 200 before I replaced it all in town driving. Never had a problem.
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Old 03-01-08, 12:02 PM   #14 (permalink)
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Condition of the transmission prior to VSS failure could also play a role in how soon it starts to give problems
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