16# Celica update

Last couple of weeks i brought my T50 gearbox to my college.

This is to overhaul the gearbox, and check for irregularities in the gearbox.

It was really dirty, it was so dirty that the dirt covered the whole floor.

It was a prickly thing to disassemble. But we finally got the whole thing rip apart.

And thanks to all my classmate, they helped me clean all the parts plus sanding the housing till it shines.

While we were at it, i counted the ratio of my gearbox

So the ratio as predicted.

First Gear: 3.587:1

Second Gear: 2.022:1

Third Gear: 1.384:1

Fourth Gear: 1.00:1

Fifth Gear: 0.861:1

Compared to the specs from AE86 specification, the T50 gearbox shares the same ratio. But i forgot the teeth number for the reverse gear.

So there's no fancy ration in there.

However, this is ratio for TRD package 1 and Package 2

TRD package 1 ratios:

First Gear: 2.630:1

Second Gear: 1.891:1

Third Gear: 1.380:1

Fourth Gear: 1.00:1

Fifth Gear: 0.861:1

TRD package 2 ratios:

First Gear: 2.341:1

Second Gear: 1.607:1

Third Gear: 1.195:1

Fourth Gear: 1.00:1

Fifth Gear: 0.886:1

The second TRD ratio is much more shorter. And thats a big advantage in sprint. But the first ratio is a wiser choice.

But this is a crazier ratio

Quaife ratios:

First Gear: 2.347:1

Second Gear: 1.733:1

Third Gear: 1.379:1

Fourth Gear: 1.144:1

Fifth Gear: 1.00:1

I guess the input shaft connect to the fifth gear perhaps.

After counted everything, asked them to help me clean the ratios.


Bought gearbox oil seal that was leaking badly. It seems that this leaking oil seal from input shaft was the cause of the clutch slip. Happened once to my previous KE70. Bought along oil seal located at the output shaft as it was also leaking...rather badly. And also a new slave cylinder.

So i sprayed the gearbox

And couple of layers of primer and colors to make it look like this.


Installing back all the stuffs

I suspected that the 2nd gear synchronizer ring was at fault, as sometimes it make a creak noise when i changed to 2nd gear. In inspection, the ring was fine, so as the shifter. So my conclusion is maybe the clutch is not in a proper condition, because the noise rarely happen and not only occured at 2nd gear. So i bought a new slave cylinder , new upper clutch pump and new clutch ;)

And after all the hassle

Back to my house. Reconditioned just like new.

cheerio