Jump to content
SAU Community

R32 Clutch Issue, Rb25 Gearbox Rb20 Motor

sean133
 Share

Recommended Posts

sean133 Proficient

sean133

Posted
Posted

Got a clutch engaging issue lads

Installed a good condition rb25 box that came out a car I wrecked

Basically got it done and car could be put into all gears but it wouldn't move

Sussed it out to be a stuck slave cylinder so replaced that with new oem item (everything seemed to lead to this)

Because we took the slave out, fiddled with the pin and put it back in and the car would drive as it should for like 10 seconds then get stuck again

So I bought a new slave but it didn't fix the issue ....

We put the rear on jack stands and took the slave off and the wheels spun in first as they should, speeding up with the revs of the car going up

Clutch slave back on and it'd do the same

On the ground the car would move when you put it in gear, but when foot went on the throttle nothing happened

At 4000ish rpm the car kinda moved a bit which seems like the clutch is slipping

But I drove with this clutch before the box change, and it had plenty of meat left otherwise I would have replaced it

New oem slave, new gktech braided clutch line, bled properly.

Fiddled with the adjustment on the clutch pedal but it didn't change anything

I understand that many people will just say " clutch is gone"

But how?

Basically the issue seems to be either the clutch is slipping which I don't believe

Or the clutch fork isn't retracting properly ,

Is there a way the thrust bearing or carrier could not be going right back in ? Leaving the clutch still engaged a tiny bit so it won't go into gear fully?

Could pivot ball be affecting this?

Could it be a spigot bush issue?

It has a new thrust bearing, pivot ball was good, and the fork wasn't cracked, and I checked it moved nicely and as it should before the box went in.

Appreciate all help and constructive criticism or let me know if I should try something to diagnose further

Thanks guys

And yes I can just pull the box out but id like to diagnose as much as possible before I do it in case I don't need to.

Because I'd like to do drift prac on Saturday

sean133 Proficient

sean133

Posted
  • Author
Posted

I could smell something burning

It all leads to a slipping clutch I suppose

Only theory I could come up with is when the slave was seized and wouldn't fully engage the Clutch before , the clutch was basically worn down to nothing because of it, which kind of makes sense

sean133 Proficient

sean133

Posted
  • Author
Posted

For anyone wondering, the pivot ball in the rb25 gearbox was too long

Which is very weird because most people seem to just bolt the box up to a rb20 easy

Pivot ball being too long burnt the clutch out hence the smelling/slipping

Got a gktech sr20 one in there now just need to bolt it up and test it out , could possibly still be wrong just need to trial and error

blind_elk Grand Master

blind_elk

Posted
Posted

No trial and error about it. A few measurements - clutch height, throw-out bearing offset, and a couple of others - and you should be able to tell whether it all fits together correctly.

sean133 Proficient

sean133

Posted
  • Author
Posted

Could figure out where the clutch sits inside the box by measuring then figure out where the face of the bearing will sit at the furthest point the pressure plate is inside the box , then if the fork angle is ok after setting it up I'll know it will work

Just weird it ever happened, no one else seems to have had the issue

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      So, I put my boat on a boat. First of all, I'm going to come out and say it. Why is Tasmania not considered a holy goal, an apex that all road-legal modified cars go to, to experience? This place is an absolute wonderland of titanic proportions. If people are already getting club runs for once in a lifetime 30 person cruises to Tassy then I've never seemed to see it. It is like someone replaced the entire place with an idyllic wonderland for cars, and all of the people living there with paid actors who are kind, humble, and friendly. Dear god. After doing a lap of almost all of the place I've found that it's a great way to find out all of the little things that the car isn't doing quite right and a great way to figure it all out. All in all, I drove for 4 hours a day for a week and nothing broke. I didn't even need to open the engine bay. This is by all means a great success, but it has left me with a list of things to potentially address. I also now have a 3D printed wheel fitment tool which annoyingly hasn't got any threads in it to actually assemble it. I might be able to tape it together to check the sizing I actually want to use, but it'll likely involving pulling the shocks out to properly measure travel at least at the front, and probably raise the car while I'm at it, at least in the rear. I scraped on quite a few things and I'm not sure how else to go about it. I was taking anything with a bump at what felt like 89 degree angles. And address those 10 other tasks. And wash the car. God damn it is dirty. And somehow, the weather was perfect the entire time - And because I was on the top of Mt Wellington it turns out it was very much about to freeze up there. I did something I typically never do and took some photos up there in what must have been -10 and the foggy felt like suspended ice, rather than mere fog. If you own a car in Australia, you owe it to yourself to do it.
    • QB6SAGR
      Battle of the broken skylines

      By QB6SAGR · Posted

      Damn that was hilarious, and a bit embarrassing for skylines in general 😂 vintage car life ey. That R33 really stomped. Pretty entertaining stuff
    • cosline
      R32 gtr transmission strength, billet plate

      By cosline · Posted

      Hi, I have a r32 gtr transmission. Does any of you guys have an idea how much power it will hold with the billet center plate and stock gearset? At what power level and use did yours brake with or without billet plate? Thanks, Oystein Lovik
    • Rezz
      Spotted on the street....

      By Rezz · Posted

      Saw this replica police car based on a Mitsubishi Starion XX parked next to a 'police box' (it's literally a box) in Hirohata, Himeji City in Hyogo prefecture the other day. It's owned by Morii-san who is a local Mitsubishi Starion enthusiast. According to a local radio station blog post, he always wanted to make a police car himself based on ones he saw in his favourite Manga comics.  As it's illegal to modify a car to look like a police car and drive on the road, Morii-san tried many times to get permission from Aboshi police station headquarters nearby. They refused initially by after they got tired of that they granted him permission. However, the car can only be displayed on private property and obviously can't be registered as long as the police livery is present. The car was completed at a cost of 1.5 million yen (US$ 10,000) in addition to the car cost. A location was chosen outside Hirohata Police box where the car can easily been seen from the street. Morii-san has two other Starion road cars, both widebody GSR-VRs.
    • Murray_Calavera
      What should I do next to hold the head on

      By Murray_Calavera · Posted

      Ah coolant overflow, previous discussions make way more sense now lol. 
×
×
  • Create New...