Internal gearbox upgrades

[mightydquinn]

Hello all, I went down to Llandow circuit this weekend and after a long drive down from Leeds in Yorkshire, my gearbox failed in selecting gears properly again after a massive 10 f*****g minutes on track. It didn't select 3rd properly, then was stuck in 4th, then would select nothing and now I believe it's stuck in 3rd.



Now it's a quaife gearset I have in, and I'm sure I've tried before but not got anywhere, is there uprated springs, selector forks, synchros or anything else I can put in to make it better an more reliable and if so, where can I buy this stuff!??? Lol!



For those that know me, this time it wasn't driver abuse as I was actually just driving it steadyish and getting warmed up and used to the track!!

Thanks Chris.

 

[PobodY]

Who (re)built it? - I'm sure I've read a couple of times where something really simple like a detent wasn't quite in place and as a result the whole box locked up.

 

[mightydquinn]

It's done a few track days and been to Nurburg since its last build so I don't think it's that pal! It just needs more new.... Better bits to go with the quaife gearset! I was just wondering who knew what was good and what's around, and were to get it! I've got 2 weeks to get it all done as I'm booked on at Croft 2 week on Sunday!

 

[fubar andy]

3/4 par selector.

The the problems that you will most likely find it that now you've added a Quaife, the stresses and strains will be transmitted into other areas of the gearbox.
I had exactly the same issues when I went to the Isle of Man. I added a Quaife and the gearbox still destroyed itself because the power was transmitted to weaker parts of the transmission.

All I have done is replaced most parts brand new and also cryo treated them for what it's worth.

 

[johnny gtir]

So are new springs etc availible ? Bearings any info as also looking to build a box up ? What's on at croft Chris ? Our special or just a track day ?

 

[mightydquinn]

Yep, it's annoying when the other parts keep breaking! I didn't realise that the gearbox internals were still available from Nissan brand new! I shall buy whatever, springs, new synchros etc that I can get from Nissan and get them cryo treated. And I shall buy the 3rd to 4th and 5th gear Par fork selector then! I guess I will just have to get it built 1 more time with standard parts that I have in a spare gearbox so it will be ready in time for Croft, and then get it all done again properly after that!
Croft is just a track day Johnny, booked through javelin! I'm in mine, my mate in his supercharged s2000, my dad in his Abarth and my other mate in his Ibiza cupra! U booking on matey!? Obviously the more the merrier! It's Sunday 17th April!
Thanks for your help Andy!

 

[whytie]

1st & 2nd Synchro - oem 3260179E00 / replacement 3260179E10
3rd & 4th Synchro - oem 3260503E15
5th Synchro - 3234439E15
1st gear assembly - oem 3223054C04
2nd gear assembly - oem 3225054C04 / replacement 3225154C14
3rd gear assembly - oem 3221556E00
4th gear assembly - oem 3221729R04
5th gear assembly - oem 3231039E10

The springs are
3rd and 4th x 3 of them oem 3260903E01
1st and 2nd x 3 of them oem 3225979E00 1990 to 1994 and 3225979e20 1994 onwards.

The ring baulk's .
1st 3260780S00 upto 1992 then 3260780S60 1992 onwards
2nd 3260479E00 upto 1994. Then 3260479e20 1994 onwards
3rd and 4th 3260403E15 or 3260479e10

 

[mightydquinn]

Thanks matey! That will be really helpful as I'm just about to ring Nissan now! The parts numbers will be very helpful!

 

[johnny gtir]

Very interested so keep us posted please

 

[whytie]

The synchros can be found easily enough on the net, I don't think you even need to goto Nissan for them

 

[whytie]

http://autopartmaster.com/en/?actio...id_provider=750466&price_type=r&price_margin=

Or

http://nissangenuine.com/nissan/nissan-hub-synchronize-3260503e15/