Jump to content
SAU Community

Recommended Posts

It is normal for a speedo to read 0-10% high (unfortunately), intended by manufacturers and ADRs (although not in this case) to ensure your speedo does not read low if your tyres are worn.

Speaking of which, what size tyres do you have on the rear, and what does they tyre placard say you should have? you can use this https://tiresize.com/calculator/ to determine what % difference that is causing

Personally, when I buy tyres for a car I buy a size that will bring the speedo back to being more accurate; it if it reads 5% high I buy tyres that are 5% larger diameter. If you had an electronic speed sender like R33 onwards, the other option is to add a speedo adjuster but that won't work in R32. Finally, you  might be able to find a different sized gear for the speedo sender but that will be limited to what already exists (and I don't know what sizes do)

7 hours ago, Kyer32 said:

so I need a new speedo cable 

Nope.

The seal is in the drive. A new cable would just fill up and continue to convey oil to the speedo head.

To check if this is what is happening, take the cluster out, dismantle the speedo and have a look. You probably don't even have to dismantle it. If there is oil coming up the cable, the drive into the speedo will be grossly greasy.

I had to manually (and delicately) clean the gunk out of my speedo.

On 8/1/2025 at 6:29 AM, Duncan said:

It is normal for a speedo to read 0-10% high (unfortunately), intended by manufacturers and ADRs (although not in this case) to ensure your speedo does not read low if your tyres are worn.

Speaking of which, what size tyres do you have on the rear, and what does they tyre placard say you should have? you can use this https://tiresize.com/calculator/ to determine what % difference that is causing

Personally, when I buy tyres for a car I buy a size that will bring the speedo back to being more accurate; it if it reads 5% high I buy tyres that are 5% larger diameter. If you had an electronic speed sender like R33 onwards, the other option is to add a speedo adjuster but that won't work in R32. Finally, you  might be able to find a different sized gear for the speedo sender but that will be limited to what already exists (and I don't know what sizes do)

 

1 minute ago, Kyer32 said:

My tyres are 215/45/r17 the 32 is a type m

 

On 8/1/2025 at 7:21 AM, GTSBoy said:

Nope.

The seal is in the drive. A new cable would just fill up and continue to convey oil to the speedo head.

To check if this is what is happening, take the cluster out, dismantle the speedo and have a look. You probably don't even have to dismantle it. If there is oil coming up the cable, the drive into the speedo will be grossly greasy.

I had to manually (and delicately) clean the gunk out of my speedo.

So if anything it’s be the seal speedo drive sorry it’s being awhile since I worked on one of these is the drive connected to the gearbox or behind the cluster 

Yep ! 

Cluster out first.

Dismantle.

Check for oil grease. If oil and grease = clean.

Then check seal at the drive coming from the gearbox. 

Seal broken  = change seal.

Doing it the other way around it will again push grease/oil back into the cluster and then your gonna have to do the cluster clean all over again !

 

On 7/1/2025 at 11:26 PM, GTSBoy said:

I would guess the seal has gone down at the speedo drive and gearbox oil has crept up the drive cable sheath and fouled the speedo head.

 

On 7/1/2025 at 11:32 PM, niZmO_Man said:

Your car was auto before? You have different diff ratio (auto vs manual i think? or n/a and turbo?)

 

1 minute ago, MBS206 said:

What makes you guess that tyre size specifically?

Just tried researching factory type m spec that’s all I can find 

Search for your VIN in gtr-registry.com and see what it left with from factory. There's 4.3:1 and 4.11:1 diff ratios IIRC, can't remember what models had what.

Also could be tyre size, by factory the speedo reads a tad quicker >80 km/h but constantly out be 10 km/h is weird.

Maybe someone wound the odometer back, and accidentally bumped the needle up?

1 hour ago, niZmO_Man said:

Search for your VIN in gtr-registry.com and see what it left with from factory. There's 4.3:1 and 4.11:1 diff ratios IIRC, can't remember what models had what.

Also could be tyre size, by factory the speedo reads a tad quicker >80 km/h but constantly out be 10 km/h is weird.

Maybe someone wound the odometer back, and accidentally bumped the needle up?

Well found out it’s a 60th anniversary gtst from that it came with 205-55r15

Interesting, I haven't read about the issue with oil getting into the speedo in the cluster before. I'll have to take more notice with mine.

The speedo on my R32's when I've run factory diff and tyre size have never been accurate as far as I can remember.

On 1/12/2025 at 9:44 PM, GTSBoy said:

No R32 GTSt had 15" wheels. 205/55-16 was standard GTSt fare.

4.36:1 is standard R32 turbo auto diff. I think the manual was too, not 4.11.

4.11 and 4.08 were R33 namual and auto respectively.

The non Type-M GTS-t did come with 15" 5 stud wheels and smaller brakes, but that's less than 5% of them. :)

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • For these last 7 years of ownership, I've always had to use a small scissor jack under one of the front tow hooks to raise the front just enough so my low-profile jack fits under to reach my subframe jack point. I'm beginning to get annoyed of always having to do this. Are there any lower low-profile jacks that fit under the gtr lip on a dropped car?
    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
×
×
  • Create New...