as I am about to take delivery of a GX 5 speed, I would like to know the ratios of it if possible. will be a great improvement on the 130ks topend it has now .. but by no means its potential, the engine is just screaming its box off (this is a B10 with an A15 with weber and extractors.) as it is geared for the original 1000cc motor. the 12" rims arent helping either. I would also like to know what size inlet and exhaust valves the A15 has.

Cheers

Tom.

i asked this on the other posting,but is it an overdrive or 1:1 fifth.the 1:1 fifth has two sets of ratios,the standard box is identical to a 1200 4 speed,except there is a ratio between 2nd & 3rd.the option 1 box came with the ratios of 1st 2.676,2nd 1.691,3rd 1.398,4th 1.181.5th 1.000,rev 2.877.the overdrive 5 speeds have 1st 3.513,2nd 2.170,3rd 1.378 4th 1.000,5th 0.875 or 0.825,rev 3.764.the a15 has 35 mm inlet & 29 mm exhaust valves.if it's a 1:1 box,it wont improve it's top speed,if it's an overdrive,it should,as the a15 should have the torque to pull the revs.if it's the standard diff,you could always try for a stock 1200 diff centre,which should lower the revs.by the way,what revs are you pulling at 130k.maybe stronger valve springs would help.have used volkswagen springs from the beetle in an a15,it was a cheaper option than stock gx twin valve springs at the time.

thanks!
do you know what code numbers the overdrive / non overdrive boxes have stamped on them?

I think FS5W60L is overdrive, dogleg rev.
FS5W60A is overdrive with normal shift pattern. I have yet to find where on the trans those numbers are stamped

the only numbers stamped on the case for either the 60l or 60a is 60 on the bellhousing.the best way to tell them apart,other than putting it in to the left & forward & seeing if it goes the same way or the opposite way to the input shaft when you turn it,is the position of the drain plug.the drain plug for the 60a is on the extension housing pointing down,the drain plug for the 60l is also on the extension housing,but points backwards.the a12 5 speeds have 56 stamped on the bell housing,near the clutch fork on a cable clutch car.the reversing light switch is also in a funny spot,it's on the top of the box,facing backwards,near the breather tube.hope this helps.let us know what type of a gearbox it is,so everyone can try & buy it off you.

hmm I wanna be sure about this, because a non overdrive box is no good to me!
also does anyone know what ratios the 5 speed from the datsun sunny wagons were?
what is the best hydraulic clutch conversion to go for and how much does it cost?

the sunny wagons were where you get the f5w60l & 60a boxes,& that's the ratios i mention in the posting.there was also a nissan sport close ratio gear set for these boxes,but i was gazumped out of one of these,so i don't know the ratios for this.as for a hydraulic clutch conversion,andrew dennis has done this on his 1200 coupe,so he can help you there with advice,i'm sure.

another insomniac I see!
If the box turns out to be non overdrive you are welcome to it,
I expect I will have to cut some sort of hole in the tunnel for the reverse switch, or surely I could source a smaller one from another vehicle.
I will put a bloody c*@$ca 5 speed conversion in if worse comes to worse.
you can look at some pictures of my car and (mostly) engine bay if you go to my www btw

some jap families must have been getting the kids to school in record time back in the day!

>the sunny wagons were where you get >the f5w60l & 60a boxes,& that's the ratios >i mention in the posting.there was also a >nissan sport close ratio gear set for these >boxes

yep, it was the non overdrive just like I knew it would be.


so I went and bought myself a new weber instead...

can I have any luck?

p.s. I can give you the gearbox guys # if you want but he's in perth also..