Ppg Gearbox

[T04GTR]

what is wrong with the case? and russ, what part broke and destroyed it? mine arives tomorrow and il be inspecting it. just while its semi in bits i can replace the suspect bits :0

[T04GTR]

has anyone read the temp the oil gets up to? my boss (used to be the x-trac guy in aus) says the straight cut gears heat it up alot..

also ive got the box in,(straight cut) man it was a hard week of learning how to shift at low rpm but ive got it pretty well down. basicly having a pause between each up shift then quickly engaging it. and rev matching on down shifts.( almost broke my hand a few times when my concentration slipped)

no thud or bauking. but having the standard tailshaft and a relativly heave os r3c clutch doesnt help... il e getting a 1 piece molly one from uas i think, as mines got heaps of play in the joints and damn its loud when changing fast at low revs a big ting/thud can be had if the revs dont match.

but one thing i found is my hand can go faster then my feet. so perfecting changes is still abit off yet lol.

[T04GTR]

oh, and while i was inspecting the gearbox, the bolt for the 5th shift fork was loose :s and i made a spacer for the 5th gear bearing. so if the circlip moves the gear wont is that what you meant russ?

[Beer Baron]

what you really need to do is take me for a spin dave!

[NXTIME]

Get in line, Richard

[ido09s]

sorry to hijack this thread, but as it seems there are a few people here who use the PPG dog box i thought i might throw up some Q's

We have finally broken the little old stock RB25 box and am upgrading the gearset..... car makes about 450rwkw and is predominantly street driven, about 5000klms a year. Other than that it gets drag raced with ET Streets and a gearbox breaking 2 step What would people suggest???

Was looking at the helical dog box, this is the quietest option, but am now a little concerned about wear on the dogs. Given i cant get the box out without removing the engine i dont really want to be taking the box out every couple of years just to repair/replace dogs. I am not really a synchro abuser so would the helical synchro box stand up to about flywheel 800hp????

Any suggestions??? pros, cons etc

[T04GTR]

yeah, if this one i got didnt pop up i would of gone helical and synchro. after a week of learning it ive got it 90% down. but.. you can change gear faster at normal cruising speeds with the synchro one. ie. 2000-4500rpm. (most street revs)

one thing i found with the dog box is that at low revs you have to rev match it or its just a nasty hand jarring experiance. and not to mension hard on the diff/tailshaft.

so cruising around is a chore. have to revmatch it and take time on upshifts. so basicly rev match it or change at 8 grand if you want it nice.

but 1st to 2nd is a nasty change. no matter how hard and fast i jam it in it atill doesnt feel as nice as 3rd.4th,and 5th. anyone else have this issue? and is it because the 2nd gear has more dogs and is bigger?

[9krpm]

Try double clutching TO4GTR, it should help your upshift speed once you get a hang of it.

My dogbox does the same thing as your. I think the 1-->2nd issue is related to the gear ratios.

[giant]

oh, and while i was inspecting the gearbox, the bolt for the 5th shift fork was loose :s and i made a spacer for the 5th gear bearing. so if the circlip moves the gear wont is that what you meant russ?

top job mate, thats exactly what i meant!

cheers russ

[T04GTR]

sik

[ido09s]

We had the same issue with a GTR we prepare and Terry from Award diffs said soemthing about the clutch being partly to blame for second gear crunches..... have a talk to Award Diffs or PPG direct as they can probably give you the fix for it.

I am still undecided though..... the box ixnt out so there is plenty of time to decide

[Swiper the Fox]

you's are all soft...helical synchro boxes are good for nines!

hand over the number plates Brad!

[giant]

paul mate you'd be mid nines with a ppg!!

awsome job mate awsome!

russ

[ido09s]

Given the car still retains its full interior and runs on PULP i would be very very happy with 9's Paul

At the end of the day i think the righ option is the straight cut PPG dog box, but i dont think i can live with the noise..... they are so damned loud!!!!

[Faid]

i used my PPG for the drangs on my super built engine with a autronic SM4. but that damn thng is too hard to drive on the street. i drove the car once with the full race setup to work and back. on the way to there it was hell, with flat 10k changes but on the way back i hit traffic on the highway, nearly bored myself to death. once home i got to removing the box and putting my OS gearbox with my 450 kw engine back in, cuz the car is bloody bad to drive with that thing in on the street, it is a monster on the track though

[XRATED]

Well, I love my helical gear set in my GTR. I have no problem driving it fast or slow, you just need to learn HOW TO DRIVE!!! Hell my girlfriend can drive it around town without banging and crashing the gearset. I do however love the solid thump when it goes into 1st. he he he. My GTR runs mid 10's in street trim, 400rwkw with T517's and an R3C.

[r33_racer]

1st-->2nd problem here too, cant ever get a smooth change, well not as smooth as the other gears.

[shanef]

1st-->2nd problem here too, cant ever get a smooth change, well not as smooth as the other gears.

u have a gummy left hand perhaps?

[PJ.]

Well I waited 6 weeks to drive my car while I waited for my PPG Helical dog gearset....and I lasted two hours before accidently shifting from 2nd to 1st instead of third. Blew a diff

It took about an hour before I wasn't crunching gears, and I didn't use the clutch on a power run from 1st to 4th and it was like a motorbike. It's unreal!

Just be careful that you don't go back into third, because unlike a syncro box, nothing really stops it from going in!

SPEWING!!!

Does anyone have a GTS-4 crown and pinion for sale 4.375??? Help a brother out!

Edited December 15, 2007 by PJ.

[NXTIME]

Stillway in Japan make a gear shifter that locks out 1st and might be applicable in this case.