Rebuilding gearboxs

[Adamal]

Got a daily driver which has a bit of a crunchy 2nd gear.
I was thinking of buying a gearbox and refitting it with new syncro's and then whacking that on.
Now, I know very little about gearboxes, so what I'm wanting to know is, is this an economically viable option? Eg, would a 3SGE manual box cost around the $50-$100 mark, and then a set of syncro's around $100-$200? Or is there a much larger amount involved?
I'm also guessing it'd be best to get a specialist involved, or would it be something that you'd be able to figure out with a bit of common sense?

[Maxwedge]

Try changing the oil if you want a quick fix, some gearbox oils are highly advanced and have additives that can eliminate syncro problems. I had a 2nd gear syncro crunch as well but I used Redline Shockproof gear oil and the problem stopped immediately. This is probably not a long term fix but its worked in my rally car and that box gets a thrashing.

[gepsk8]

fwd gearboxs are expensive to fix. just throw another one at it, specilly if 3sfe is same box.

[matt dunn]

syncro's around $100-$200? Or is there a much larger amount involved?

About $100 per gear for the syncro's,

Plus labour,

[Adamal]

So I should probably get used to double clutching then?

[Lloyd]

Get another box and chuck it in, depends how much it annoys you I guess.

[ChaosAD]

Need a few specialized tools such as a press and a bloody good set of pullers.
Cheaper and a lot less hassle to just buy another one.

[Mr Revhead]

slap in a 2nd hand one

then pull apart the old one to learn/see if you think you can do it.

[Bumpy]

slap in a 2nd hand one

then pull apart the old one to learn/see if you think you can do it.

Great idea that one!