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Grinding Gears

Dodgy1_SA

By Dodgy1_SA,
in South Australia

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Dodgy1_SA Contributor

Dodgy1_SA

Posted
Posted

Hey guy's, just wonderin if anyone could help me. My 33 is starting to have a few grindies, mainly if I'm shifting quick into 4th, if I take it really steady *slowly* it tends to go no prob's.. now if I go to over take truck's and shoot from 5th back to 3rd it's sweet, but if I jump straight back to 5th, she don't wanna go without force and a little grind (I was doin that due to the 4th prob). I's this the syncro's f*kucked or what??? just wonderin if anyone could help me there. I think I will need a new clutch soon, so is that a good time to get it fixed if it is??? sorry if I sound a bit dumb...

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Pauly33GTS-t Veteran

Pauly33GTS-t

Posted
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I changed the oil to Redline Lightweight Shockproof and havent looked back. IMO fully synthetic redline oils are the way to go. they recommend lightweight shockproof for racing applications in 33gts-t but ive had no nicking since changing to this oil. also, yes the synchros are slowly f**king in ur car, a rebuild may be needed down the track, the 125 dollar option for redline oil is a mask for the problem, if u keep nicking after 5kms after the oilchange to redline, u will probably need a synchro replacement in ur gearbox. synchro replacing isnt needed on a regular basis, but maybe the little jap guy that drove ur car before u has hammered the f**k out of it or learnt to drive a manual in it lol.

Paul.

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Dodgy1_SA Contributor

Dodgy1_SA

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if you mean by heavy load tryin to take off in second (oops) someone did it by accident the other day and she slipped like F**K. so to your question the answer is yeah. teach ya for lettin someone else drive your baby. bad smells, but it hasn't effected bootin her in first. oh and I on the cruise the other day might have tried putting my burnin rubber exercise through to second and she didn't like that much :P

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Cubes Grand Master

Cubes

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I have been lucky enough not to have a syncro problem as of yet.

A few times I have thought I was possibly having syncro problems when it came down to a leaky mastercyl, then the slave cylinder went and another time a pedal box that popped its welds.

So check those few before laying out $$ on oil.

Castrol Syntrax is another VERY good gearbox oil thats not to be overlooked.

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Bl4cK32 Grand Master

Bl4cK32

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Myn is starting to grind at high RPM in 3rd and 4th, can synchro be upgraded and a higher 5th gear be made

on the track i hope :) Syncros cant be upgraded, just rebuilt. Higher 5th is achieved by lowering the diff ratio

Castrol Syntrax is another VERY good gearbox oil thats not to be overlooked.

+1......+1

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Turbz_13 Experienced

Turbz_13

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seems like a common problem for nissan. my gtr does that was well if i try to cheange into 4th to quick or drop it back. and the same happened to my cousins gtir pulsar. if i slowly change into 4th it seems fine.

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writeoff Mentor

writeoff

Posted
Posted

I had the same problem in one of my GTRs when changing into 4th on high boost. I used the Redline Lightweight Shockproof that Paul mentioned above and it worked a treat. I've never had an issue with the syncros since. It was $35 a litre but well worth it. I'm about to get my other GTR serviced next week and have already stated that I want the gearbox oil changed to Redline. Probably going to use a different Redline oil for the diffs as well.

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Turbz_13 Experienced

Turbz_13

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Posted (edited)

i might have to try this oil when i get the car serviced again. i have no idea what oil i hvae running in it at the moment, but it was changed atleast 18 months ago.

Edited by Turbz_13
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