Used Gearboxes

[FATGTS-R]

I am going to be upgrading my RB20 box to an RB25 item and would like to know how you gauge the condition of a used gearbox that is not fitted to a car?

Surely it cant be a case of handing over ~$1200 and crossing your fingers, can it?

[someonestolecc]

It's impossible to tell without opening. Unless you can open it yourself and don't mind putting it back together with the parts you need to buy new then you can do that. My theory is if you're paying someone to open it you may as well just have it rebuilt.

Unfortunately it's a bit of a gamble.

[R31 POWER]

Only way i can think of is make sure it's got a shifter so you can row thru the gears and still spin the input shaft.

Not a 25det box i know but i bought a 20det box but did'nt test it with a shifter,i could'nt select a few gears and it locked it up.So yer thats all i can say.

[Bl4cK32]

I got stung. RB25det box - It still selecteed gears, but it has bearing noise right at 60km/h in 4th and decelleration.

There is no real way to tell, but if you buy it from a wreckers, ask, and im sure they supply them with a guarantee it works.

Syncros in my box are the only real good thing, it selects great.

[StockyMcStock]

i have heard talk that you can go to certain gearbox shops around the place and they have a test stand setup for manual boxes. it's probably just a lathe with an adjustable holding jig and some sort of output shaft RPM measuring thing hooked up to a computer. have heard it doesn't cost much to get em tested either.

[Cubes]

Remove the drain plug.

Std they contain a magnet, this will give a slight indication.

[Roy]

But its not hard to remove the cluter of gears, well it wasnt when i watched a friend fiddle with his R33 box when needign to change push/pull mechanism.

If the thing hasnt been drained the plug would be a goof idea, but if someone knows anything about boxes, it would be good oif they could post some pics of what to look at...

While my box lives im happy to keep running it,but i am looking for a better solutiuon then a 2nd hand R33 box...i dont like the weight and i dont like the price.

I did hear that CA18DET box internals are the same????? And i Japan you can buy CA18 gear sets???? Pure speculation, but its what i was told