Different speed sensor gear for sr20 trans and ka24 trans?

[supradealz]

My problem:

Speedo reads about 2x the actual speed (I'm going 60 it says 120). Always done that since I bought it with the s13 blacktop sr20 swap + sr20 5speed transmission.

Tried:
1) Replacing gauge cluster
2) Replacing speed sensor with NEW S13 and S14 speed sensors

To no avail.
I noticed that you have to reuse a plastic helical gear when swapping speed sensors.

My question:
Is that plastic gear different on JDM SR20 and USDM KA24 transmissions? Cuz if that helical gear was different it would spin the sensor a different rate - ala kilometers on a US dash. Thats the only part I can think of that can be throwing it off.

[projectRDM]

If you had searched you'd find there is no difference in markets for the VSS. Your assumption of one reading KM/H and the other MPH is sad. Look at both clusters, the numbers fall in the same place on both. The VSS transmits an analog signal, the cluster wouldn't have a way of deciphering one from another.

The VSS must match the cluster, there's nothing else required. S13 = S13. S14 = S14. All markets use the same sensor *except* for the change between manual and auto.

[supradealz]

my car is an auto to manual swap.
when i'm going 60mph the gauge is reading 120mph / over 200 kph and its pegging the right side of the gauge.

i swapped clusters but i dont know if it came from an auto or manual car. so i have a manual vss, all i need to do is swap for a 5sp cluster or swap for an auto vss? is there a way looking at the cluster to know if it is from a 5sp or auto?

[Sileighty_85]

All M/T S13 SR/KA VSS are the same, I just did a KA Tranny Gear swap in my S13 Speedo is still the same.

Clusters from Auto or Manual doesnt matter.
Auto Cluster will have an "O/D Off" light on the bottom left side

[g6civcx]

all i need to do is swap for a 5sp cluster or swap for an auto vss?

The VSS transmits an analog signal, the cluster wouldn't have a way of deciphering one from another.

The VSS must match the cluster, there's nothing else required. S13 = S13. S14 = S14. All markets use the same sensor *except* for the change between manual and auto.

Also as said above, just use an S13 cluster. It can be from any trim.

[Ceepo]

If your car is a s13, get a s13 vss(i have one) if your car is s14, get a s14 vss(i need one lol) must be from a manual car tho... if you have a s14 one i would gladly trade my s13 one for it...

[supradealz]

my car is a 95 s14 with an s13 sr20det blacktop. the car was originally auto so the cluster is from an AT car.

Now it has the s13 sr20 engine and tranny, s14 manual VSS, and Auto S14 gauge cluster and its reading 2x. Not reading in KM i.e. at 60mph the gauge is reading 120mph/200kph (almost maxing out the gauge) At about 75 mph my gauge is past the limit of the gauge.

It sounds like i should be reading the correct speed but I'm not. I noticed you have to transfer a helical gear from the old VSS to the new one. Could it be that the helical gears are different from S13 and S14 (since my trans is an s13 and gauge is an s14)

What do i need to get this to read the right speed?

[DreamN]

Are you sure you are using a manual s14 VSS? Take pictures so we can verify.

Transmission makes no difference.

[projectRDM]

my car is an auto to manual swap.
when i'm going 60mph the gauge is reading 120mph / over 200 kph and its pegging the right side of the gauge.

i swapped clusters but i dont know if it came from an auto or manual car. so i have a manual vss, all i need to do is swap for a 5sp cluster or swap for an auto vss? is there a way looking at the cluster to know if it is from a 5sp or auto?

No. The cluster isn't any different either, and the auto VSS won't fit a manual transmission.

[S14DB]

Does the VSS have a plug on it or a long lead with a plug on it?

[supradealz]

the VSS has a black cord coming from it then a plug on the end.
i'm sure its a manual. i bought it from autozone, told them manual. it fits perfectly. i'm just wondering if its the plastic gear. you have to transfer a helical gear over that came with the transmission. i dont know what that gear came out of - the ka24de transmission or the sr20det transmission. could that gear be throwing the speed off? maybe that plastic gear is different from us and jdm?
btw i got the same readings with an s13 and s14 vss (both manual). they both read 2x the correct speed.

[!Zar!]

While it is possible to buy different gears for the speed sensor (last I checked?) None of them should make the speed read 2x. Are you sure your cluster is good?

[Ceepo]

you need to use the manaul gear for a s14 vss, you can buy a new one from nissan(part no. 32743-71120 i believe) if your car is a s14, you need a s14 manual vss with the gear, if your car is s13 you need the s13 vss with its correct gear...

s14 vss(automatic one will not fit a manual transmission its a hair to large in diameter...)
http://img.photobucket.com/albums/v644/P_Productions/Parts%20for%20sale/011.jpg

s13 vss(that cylinder looking thing with wire coming out)

http://c1.ac-images.myspacecdn.com/images02/94/l_f1dda53e2f514283bb3270e41721db28.jpg

[S14DB]

the VSS has a black cord coming from it then a plug on the end.
i'm sure its a manual. i bought it from autozone, told them manual. it fits perfectly. i'm just wondering if its the plastic gear. you have to transfer a helical gear over that came with the transmission. i dont know what that gear came out of - the ka24de transmission or the sr20det transmission. could that gear be throwing the speed off? maybe that plastic gear is different from us and jdm?
btw i got the same readings with an s13 and s14 vss (both manual). they both read 2x the correct speed.
As shown by Ceepo's photo's you have an S13 VSS. The S14 VSS just has a connector on it no lead.

[supradealz]

so assuming the original auto helical gear was put onto an s14 manual vss then the speed would read incorrectly?
it definitely had a lead but i got it from autozone not from nissan. but its possible they pulled the wrong part. it was ordered as a 95 240sx manual vss.
i will order a new gear. that HAS to be the problem. i've tried s13 and s14 vss and they both consistently read 2x the right speed. i dont think the vss would be designed so differently to be off by that much. maybe 10-20% but not 100%. now going from auto to manual its a big difference that could account for the difference. also it was real snug getting it back on possibly too tight due to wrong gear.


you need to use the manaul gear for a s14 vss, you can buy a new one from nissan(part no. 32743-71120 i believe) if your car is a s14, you need a s14 manual vss with the gear, if your car is s13 you need the s13 vss with its correct gear...

s14 vss(automatic one will not fit a manual transmission its a hair to large in diameter...)
http://img.photobucket.com/albums/v644/P_Productions/Parts%20for%20sale/011.jpg

s13 vss(that cylinder looking thing with wire coming out)

http://c1.ac-images.myspacecdn.com/images02/94/l_f1dda53e2f514283bb3270e41721db28.jpg

[supradealz]

and yes i've tried 2 clusters both reading exactly the same so its not the cluster. doesnt seem to be electrical because i metered out the cluster. also AEM reads the displayed speed (this problem occurred pre-AEM and post-AEM) not the actual speed so that means the cluster should be ok.

[mad-ass]

S13 VSS in a S14 will make your gauge read double the speed.
S14 VSS in a S13 will make your gauge read 1/2 the speed.

S13 VSS has a harness attached to it.
S14 VSS has no harness attached to it, the harness clips to it.

Hope that helps.

[projectRDM]

so assuming the original auto helical gear was put onto an s14 manual vss then the speed would read incorrectly?
it definitely had a lead but i got it from autozone not from nissan. but its possible they pulled the wrong part. it was ordered as a 95 240sx manual vss.
i will order a new gear. that HAS to be the problem. i've tried s13 and s14 vss and they both consistently read 2x the right speed. i dont think the vss would be designed so differently to be off by that much. maybe 10-20% but not 100%. now going from auto to manual its a big difference that could account for the difference. also it was real snug getting it back on possibly too tight due to wrong gear.

You're incorrect. There is no aftermarket VSS for the S14, period. No one makes one. The one you got listed for an S14 is an S13 unit, OTC parts store aren't always up to date or have accurate information about part interchange. If you didn't buy it at the dealer, it's an S13 VSS. If it doesn't look exactly like the one pictured above, black plastic case with no leads, it's an S13 VSS. I've been over this a million times on here, no one seems to listen. The dealer is the only place you can source an S14 VSS.

The gear is the same size for both units, but you can order different size gears to account for tire/wheel changes through the dealer. The auto VSS is too large to fit in the manual transmission case, but it reads the same signal as the manual does, so your assumption that using an auto VSS would throw it off is also wrong. It would read correctly, *if* the sensor would fit into the transmission. It won't.

[supradealz]

thats what it is then. i bought an s13 VSS and a so-called s14 VSS from advance auto and they both looked the same and both had the harness coming out of it.
and there are a lot of posts about this issue so apparently all the s14 guys that cram s13's in their cars go to advance and buy a $50 VSS versus a $150 VSS then have this problem - whereas the S13 people dont have this problem.

[S14DB]

thats what it is then. i bought an s13 VSS and a so-called s14 VSS from advance auto and they both looked the same and both had the harness coming out of it.
and there are a lot of posts about this issue so apparently all the s14 guys that cram s13's in their cars go to advance and buy a $50 VSS versus a $150 VSS then have this problem - whereas the S13 people dont have this problem.
Read the post before yours.

No one makes an aftermarket S14 VSS. You just bought a S13 VSS.

Your choices are new Nissan for around $150 or Used.

[zombiewolf513]

Sorry to necro this thread, but when installing an s14 sr trans into my s13 chassis, the s13 ka vss will work in the s14 trans correct? I swapped them out today, but it seemed like i had to work them both around to get them out, then when I put the KA s13 one into the s14 sr it just slipped right in. I'm just making sure that what I did was actually right.