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no reverse...?? r32 GTR

R32zilla

By R32zilla,
in Engines & Forced Induction

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R32zilla Experienced

R32zilla

Posted
Posted

Hi all,

Next problem...came back from a short drive, no issues whatsoever.

Go to select reverse to go for a drive...and I could not select at all. So pushed the car out...and the rest of the box is perfect.

Could it be the reverse shift fork perhaps?

The box has been no problems apart from a very slight notchiness for 3/4th change...

Obviously the box has to come out to check the fork?

:P

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R32zilla Experienced

R32zilla

Posted
  • Author
Posted
Doesn't reverse share the fork with 5th? does 5th work?

Does it just physically not go into gear? or do its go into gear but just act like its in neutral?

Ferni,

It wont go in at all. So physically it wont allow me to select reverse...

The manual shows a shared OD and Reverse fork rod, but also a dedicated reverse shift fork...

:headspin:

Dave R31 Enthusiast

Dave R31

Posted
Posted

On the R31's, I think the reverse gear has no synchros so sometimes it just wont go into reverse. If you let the clutch out (in neutral) then in again it will then just slot straight in. Try pumping the clutch then trying again. It might be the same on the GT-R box. Worth a try anyhow.

SteveL Mentor

SteveL

Posted
Posted
It wont go in at all. So physically it wont allow me to select reverse...

Question is....can you still get 5th ?? Also does the shift lever still have normal travel when trying to get reverse ??...or does it stop part way ??

5th is 'operated' by a 'pin' link mounted on the reverse shift fork. If you can get 5th, then it's not a linkage problem, but probably a broken/damaged reverse shift fork or roll pin. If you can't get 5th it could be a linkage problem further forward in the 'box, but could also still be something to do with reverse mechanism. There are other remote possibilities like shaft circlips breaking.

R32zilla Experienced

R32zilla

Posted
  • Author
Posted
Question is....can you still get 5th ??  Also does the shift lever still have normal travel when trying to get reverse ??...or does it stop part way ??

5th is 'operated' by a 'pin' link mounted on the reverse shift fork.  If you can get 5th, then it's not a linkage problem, but probably a broken/damaged reverse shift fork or roll pin.  If you can't get 5th it could be a linkage problem further forward in the 'box, but could also still be something to do with reverse mechanism.   There are other remote possibilities like shaft circlips breaking.

Thanks Steve. I can get 5th. I guess trying to fix this issue would be cheaper than getting another second hand box.

SteveL Mentor

SteveL

Posted
Posted
Could be a spring and ball issue locking me out of reverse perhaps?

You could have a look at the reverse check device which is mounted on the passenger side of the O/D case just below the pressed steel cover plate. It's held in by a 10mm head bolt and is sort of 'tear drop' in shape. It's got a 'cam' and hairspring arrangement and I suppose there's a remote possibility the spring could break. But if you've got normal lever travel when trying to select reverse it's unlikely to be that. Anyway, you could try taking it out and seeing if it makes any difference (note it's got a sealing o-ring on the body so might take a bit of levering, plus I'm not sure there's enough clearance to remove it completely with the gb in the car).

There's also a check ball, spring and plug for the O/D and reverse mechanism on the drivers side of the gearbox on the sandwich plate. Again, you could try taking out the plug and see if it makes any difference.

  • 7 months later...
Guest DIRTgarage

Guest DIRTgarage

Posted
Posted
I've heard of the spring going...did you work it out?

Was there an easy way to fix it?

we had a reverse problem.....it was the reverse thrust washer in the rear half of the box....it stopped us selecting it at all....it was in a second hand box we borrowed when we smashed on at Eastern Creek earlier this year.

Beer Baron Grand Master

Beer Baron

Posted
Posted

also check your hydraulics. much cheaper than pulling out the box and it's possible that a dud slave or master is preventing you from completely disengaging the clutch, hence you are unable to select reverse. easiest way to test this is to switch off the engine, then try and select reverse.

  • 4 months later...
cowie165 Veteran

cowie165

Posted
Posted (edited)

*bump*

Hi team.

Same problem here. Gearbox oil is 1,000km old. Reverse no worky. Difficult to engage 5th when engine is off and without the clutch. 1st through 4th engage engine off no clutch.

Reverse does not engage at any time. It does not move on the fork at all. The wasn't any crunch/bang nor any whining in the gearbox prior to failure.

Thanks Steve and Paul for the info! It gives me something to go on.

Here's hoping I can sort this out in the garage... it crumped whilst taking my wife out for our wedding anniversary! :P Sure puts the pressure on at the shops when you only have one shot to nail the parking space. :)

@R32zilla: Mate did you sort this out in the end?

Edited by cowie165

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