Grinding Gears

[Dodgy1_SA]

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...

[Pauly33GTS-t]

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.

[Madaz]

now i may b 100% wrong but i was of the understanding syncro's were for 1st -2nd gears the rest didnt have them??

does your clutch slip @ all under heavy load?

[Dodgy1_SA]

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

[Bl4cK32]

now i may b 100% wrong but i was of the understanding syncro's were for 1st -2nd gears the rest didnt have them??

yer they are on every gear

[kralster]

almost had me? granny shifting not double clutching like you should! your lucky that 100 shot of NOS didn't blow the welds on the intake! almost had me?

[Pauly33GTS-t]

next person to quote the fast and the furious gets a kick in the teeth from this guy

[cruzin33]

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

[Pauly33GTS-t]

you have to replace all the synchros, and lengthening the 5th gear... im not sure about that.

[Cubes]

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.

[Dodgy1_SA]

thanks for the idea's guy's. I'll have a look when I get my car back. pain in the bum when the missus car's just lost 5th. bloody old small car's, in particular holdens... lol

[Bl4cK32]

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

[cruzin33]

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

+1......+1

What is the next step up from a stock box but keeping it streetable?

[Bl4cK32]

33 box is fine for most power levels. Next step up would be a os giken gearset.

Do a search in the driveline section, it has all the upgrade options. Imho if u need anything more than the 33 box is capable of, then u should consider not driving it on the street.

[cruzin33]

Reason i ask is im due for a rebuild soon and im always reading that the r33 gear box always crunches at high rpm,so i wanted to build it stronger and right while it out of the car save me the pain in the future.

[Turbz_13]

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.

[writeoff]

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.

[Turbz_13]

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 March 31, 2007 by Turbz_13

[Rekin]

My gearbox had bad syncro problems, I used Redline and fixed it perfectly. Although the problem has come back and its been only 10,000km. Does that mean redline wont even fix my problem now?

Thanks

[heslo]

Most likely buddy, if it's come back after 10000k then it sounds like the syncros are shagged