Jump to content
SAU Community

Recommended Posts

Hey there,

I have a problem with my gearbox (RB26)....i am crunching gear 3 to 4 at high revs,

At low revs all is fine

Does anyone know what it could be, clutch adjustment , syncro or needs a service?

Who does a good job out there repairing this sort of thing?

Thanks in advance

Tekin

Link to comment
https://www.sau.com.au/forums/topic/128018-gear-crunch/
Share on other sites

Syncro......fairly common thing for Nissans

STOCKGTR has the same problem

I have never serviced it.......who can....i suppose all they do is change the oil.

Or are there other things to look out for when you take the cover off?

How much roughly to repair if it is the syncros.?

Link to comment
https://www.sau.com.au/forums/topic/128018-gear-crunch/#findComment-2367210
Share on other sites

I've heard people over flow the gerbox by 50 ml to make it a bit better. I've had 3 nissan gearboxes crunch into 4th and one I had to replace because of 2nd synchro.

I have heard there are special oils you need with the RB26 gearbox .

And that overfilling them and having a cooler for them works well

What sort of oil is the best for these things?

Link to comment
https://www.sau.com.au/forums/topic/128018-gear-crunch/#findComment-2367242
Share on other sites

from memory a set of 4th gear syncro is about $130, however while you have the box apart you might wanna change 2nd and 3rd.

I would say all up with labour you'll be looking around $1k.

Get the syncros done asap, if you leave it too long you start screwing up the gears which will be more $$$

Link to comment
https://www.sau.com.au/forums/topic/128018-gear-crunch/#findComment-2367248
Share on other sites

from memory a set of 4th gear syncro is about $130, however while you have the box apart you might wanna change 2nd and 3rd.

I would say all up with labour you'll be looking around $1k.

Get the syncros done asap, if you leave it too long you start screwing up the gears which will be more $$$

Thanks for that advice guys....I suppose Ill have to look up a transmission specialist on Monday. :D

Link to comment
https://www.sau.com.au/forums/topic/128018-gear-crunch/#findComment-2367264
Share on other sites

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

    • Manual boost controllers (where a little of the boost was bled off) were quite common back in the day, because they were cheap and easy. Generally they had a manual adjustment screw rather than being fixed like yours. Down side is they always bleed boost, not just when you want them to so an electronic boost controller that uses a solenoid will have less lag.
    • Hello , im new here and i have A31 home build  RB25det neo stock eng / turbo  aem ems 2 blue connector  aem 3.5 map aem cas disk aem wideband connected to ecu  355 lph pump 550 nismo yellow injectors side feed aftermarket regulator  and won’t start with base aem tuner basic tune eventually flipped cas 180 degree so it triggers on correct stroke not in exhaust cycle  Now it won’t start Wideband reads 10 and 11 at lowest fuel setting  and will share calibrations soon for aem tuner i think something is wrong in aem tuner    please if you have any information, am very grateful         
    • Legend. I ended up finding the facebook account of the owner of the first car i sent but sadly he deactivated the account. I think you’re right in saying it’s some sort of well done custom job. Really appreciate your help anyways.
    • Totally equivalent. Stock often goes from the comp cover because that's where the actuator is also installed and the factory needs 2" of hose to make the connection - and it comes as a pre-assembled unit. They totally have a boost reference from somewhere between the turbo and the throttle(s). Oh, jeez. Just do it in M12 then. We don't actually care that much. I would expect any such AN converter fitting to rely on an o-ring or some other seal onto a flat surface under the flange of the hex**, because bolt threads are no intended to provide a pressure seal. unlike..... pipe threads. **which also requires a suitably flat and smooth surface on the turbo's boss to provide the seal.
    • I also used NP   That’s were it’s seems to be the best place to fit it? All schematic shows also that it’s should be referenced from the turbo housing. But idk, I do see high hp cars without any connection or anything to their turbos, so I really don’t know how they connect their things
×
×
  • Create New...