Okay, remind us again how to do the Celica 5spd conversion.

Buy a Dellow bellhousing kit. Only $700! Not including transmission.
Links are in the 5-speed Overview article.

so will the gear box from an a12 b210 or b310 survive behind a stock a15?

The stock A12 box has survived so far behind my worked A14 (over 1500cc's). I haven't had any issues and haven't really baby'd it either. I think your plan for saving money and making due with what you've got sounds like a good plan.

i have two gear boxes at home doing nothing, one out of my old race 1200 coupe.
smoothe case i think its a sunny.
full house a15 could'nt break it, must have been the good Penrite oil.
Other is standard 1200,
your welcome to make an offer if you can pick up from melbourne.

i reckon even the stock 1200 will take a fair a15 too

I disagree but I may be wrong.

When doing calcs to work out if something will #### itself, one uses the torque value, the rpm and the type of engagement. For instance, if u want to know how big to make a tailshaft to survive 100NM of torque. If the raw data says u need a shaft of X strength, thats all u need if the clutch is slipped at a low RPM. If u dump the clutch from 6000 RPM u will need tailshaft with twice the strength of the first shaft.

One must also look at the tyres used. If the diff is open and the tyres spin easily.......then the spinning tyres help keep the gearbox together. If one has a locked diff with extra sticky tyres.....dropping the clutch is not recomended.

Quote:Yes. The ones I've seen use the 60 or 63 series gearboxes, same as Nissan put behind the A15.

And since worked motors often have less torque in the 'normal' range of low rpm partial throttle, a stock B110 gearbox (56-series) may survive just fine behind a worked A15.

Like datsik says, it depends. But many of us have broken standard gearboxes behind A15s during normal use (no abuse).

datsik, a stock A15 (or A12) has more torque at 3000 rpm than it does at 6000 rpm.

I remember years ago I had a 120Y, abused it till the motor died then after I turboed it blew the gearbox. I recall only having to put new bearings and put bigger needle bearings in the input shaft or output shaft...????
I will let you know later, but hell I couldn't blow it any more. I ended up nearly putting myself in Heaven as I rolled the car at 140Km/H around a downhill corner in third.
I miss that car and damn it was stupid. But #### that gearbox was good.

The Pilot bearing in the Input shaft to mainshaft, and the needle bearing for the laygear. They're the two that were enlarged.
The needle bearing was the main culprit though.