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Anybody had to fix synchros in gearbox?

KRiMiNaL
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KRiMiNaL Community Regular

KRiMiNaL

Posted
Posted

Ive got an r33gtst series 1 and 4th gear i have to put in really slow or ill get a crunch and 3rd does it sumtimes when im changing gears fast. My mechanic told me its synchros and said its a big job because you have to get the gearbox out. How much do you guys think I can get it done for, use know any cheap places?

bluefire Contributor

bluefire

Posted
Posted

the gearbox will have to be removed and disassembled. Each gear, shim, syncro, fork, retaining clip, etc... will have to be removed one by one off the shaft to reach the 4th gear synchro. Not an entirely difficult job, but a tedious and somewhat time consuming job

saliya Rising Star

saliya

Posted
Posted

... what he said ;) I'll add that if you have the box out and down, you should do a bearing set in it (which significantly changes the parts bill from just 1 or 2 synchros but will save you pulling it down for bearings later).

Regards,

Saliya

jnr32r Proficient

jnr32r

Posted
Posted
the gearbox will have to be removed and disassembled. Each gear, shim, syncro, fork, retaining clip, etc... will have to be removed one by one off the shaft to reach the 4th gear synchro.  Not an entirely difficult job, but a tedious and somewhat time consuming job

Not as easy as it sounds... I had to change the bearings in mine and it was a bitch.

If you dont have a proper bearing puller i wish you luck.

I ended up pulling it appart on a sunday so the shops were all shut and had to fabricate my own puller and it was still a bitch...

surfiemullet Apprentice

surfiemullet

Posted
Posted

before u decide to pull down the box drain the oil and get some new oil. This worked on a mates pajero, they put in some fancy oil at some stuped high price and he got another 2 years before something else broke. also a full bearing and syncro kit will cost heaps.

QuickR33Melb Rising Star

QuickR33Melb

Posted
Posted

I agree totally with "surfiemullet"

Buy a teflon treatment for around $15 and some Castrol Syntrax or redline shockproof oil first ($130).

I had the same type of dramas on an STi gearbox which would have cost me massive $$$$.

I changed the oil in the box with the addition of teflon treatment, drove for about 400km and it never caused me another problem. Before I did this it would crunch badly changing into second after 4000rpm

race_snooze Grand Master

race_snooze

Posted
Posted

ok i just did mine same as you 4th clrunched. Cost me including a new clutch and bearings, oil, flywheel machiened, and labour $2400. The synchros are like $750 i replaced all of them too, no point doing 1 or 2

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