hmmm gearbox is rooted,

TomVR4 · Post by **TomVR4** » Fri Aug 31, 2007 9:33 am

i think my gearbox is f&#%ed.

ive noticed a bit of noise coming from the gearbox for a little now. sort of like a ticking/ rattley type noise even in neutral with the clutch let out.

but when i was driving to uni this morning i went to put the car into 3rd (driving normal not boosting at all) it crunched on the way in (does this sometimes) and then once in gear it was making a really bad noise. sounded like there were ball bearings loose in there. put it in too 4th and it was sweet tried 3rd again and its rooted.

i think i am up for a new gearbox, the current set up is the sigma box with starion internals. i am deciding whether to get this rebuilt or if i should get a supra gearbox. any ideas on how much these two options would cost.

i don't really want to spend much more than a grand but i will if i have to. i want the gearbox to last so what should i do..

MrBishi · Post by **MrBishi** » Fri Aug 31, 2007 9:48 am

Have you converted the sigma box to hydraulic clutch or converted the starion to cable clutch?

TomVR4 · Post by **TomVR4** » Fri Aug 31, 2007 9:53 am

yeah its hydrualic

MrBishi · Post by **MrBishi** » Fri Aug 31, 2007 11:48 am

The only way currently to get a supra box into your car is to use a CRS adapter plate. These use the 2L borg warner bellhousing out of a GH/J sigma & you will need to ship the bellhousing to them for machining.

-CRS plate & machining
-Clutch plate to suit Sura
-Custom crossmember
-modify tailshaft
-supra g/box in reasonable condition (easier said than done nowadays)
-correct shifter extension to suit staz
-Convert cable bellhousing to hydro.

As you can see it all adds up. The upgrade offers questionable gains over a Starion box for a heap more cash.

Do you think you can rebuild the current box yourself?

Post by **Alspos** » Fri Aug 31, 2007 11:49 am

I'd be checking other things first b4 jumping to a new box. Are all the box/engine bolts tight? Problem getting into first? Does it make the noise with the clutch in? Thrust bearing may also be shagged.

TomVR4 · Post by **TomVR4** » Fri Aug 31, 2007 12:35 pm

yeah ill check the bolts and change the gear oil. but i don't have any problems getting it into first. nah i don't think it makes the noise with the clutch in..

Starion VR4 · Post by **Starion VR4** » Fri Aug 31, 2007 12:51 pm

Bite the bullet, remove the bottom cover on the G/Box( NB, remove oil 1st!!! rofl ) have a look at the internals, but it sounds like yr syncro hub has shit itself, will post pic later.... :beer

Rebuilding G/Box is tricky, mainly the 5th gear as it sits in the rear housing & is a press fit on the output shaft, U will require a long puller, but after that ist's straight 4ward

TomVR4 · Post by **TomVR4** » Fri Aug 31, 2007 12:53 pm

my mate reckons its a smashed 3rd gear or stripped teeth. I got a couple of friends who are mechanics so they could probably help me rebuild it. but i have never done a gearbox before, not sure about my mates. how hard is it?
yeah ill try and pull it apart this arvo.

TomVR4 · Post by **TomVR4** » Sat Sep 08, 2007 9:30 am

pulled the bottom plate off. 2 teeth smashed off third gear. so im am trying to get a supra box, advanced jap said they have adapter kits for 350 which make the box bolt up. and i think i can get a tail shaft made for 400. so i just want to find a box.

WANTSOM · Post by **WANTSOM** » Sat Sep 08, 2007 11:03 am

I have a good starion gearbox sitting here if you want. $100 pick up Sydney.

Bolt straight in.

2000_turbo · Post by **2000_turbo** » Sun Sep 09, 2007 6:05 am

http://projectzerog.com/forum/

Lots of info here. You can also use the 88-90 Starion gearbox they are very strong.

Gr,

Martijn.

redzone · Post by **redzone** » Sun Sep 09, 2007 11:47 am

tomvr4 has a narrow pattern block guys so starion boxes wont go straight in...

OLD FART · Post by **OLD FART** » Sun Sep 09, 2007 8:23 pm

WANTSOM wrote:I have a good starion gearbox sitting here if you want. $100 pick up Sydney.

Bolt straight in.

SOLD It,s mine as i need a box 4 my stroker and all being well I will be in Sydney later this month 4 a tyre launch at Eastern Creek so i hope to collect it then and meet some of our southern friends then :beer
I want to strip & check it & send it to be cyrogenicly treated to strengthen it b4 I bolt it up to my " Frankenstein grunter motor "
p/s can you advise if it's mine :)

TomVR4 · Post by **TomVR4** » Tue Sep 11, 2007 1:08 pm

2000_turbo wrote:http://projectzerog.com/forum/

Lots of info here. You can also use the 88-90 Starion gearbox they are very strong.

Gr,

Martijn.

how common are these gearbox's, not many in aus i asume.

2000_turbo · Post by **2000_turbo** » Tue Sep 11, 2007 2:54 pm

Those boxe's came with the last Starion WB's (88-90). They can hold much power, however with my twincam it can not hold the high rpm's. The synchro's don't like high rpm's. Shifting can be difficult sometime's.

Gr

Martijn.

Austarion

hmmm gearbox is rooted,

hmmm gearbox is rooted,

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