Is Gear noise normal after oil change? | Corolla Altis 1.8

[syedhaadofficial]

Are there any authentic sources we can refer to?

[rajaatta]

I pour in 2.5 L in those large c50s

[Xulfiqar]

now read his post.

his mechanic had the car on jacks in front, and filled it with gear oil - you and I both know the gear fill is near the rear of the gearbox, so it will overflow well before the box is full due to the tilt because its on jacks/ramps.

then his mechanic rolled it off the jack and was expecting the low quantity of oil to overflow (magic I think) - and when nothing came out, he packed it up and said "poora hogya tel"

facepalm!!!!!!! - this is a new level of genius level repair.

[Xulfiqar]

toyota workshop manual.

and if you tear down the gearbox to look inside you will see that the 5th gear relies on the gear oil splashing by the rest of the gearsets - if the level is low (like half liter or so) it will run dry, This is common knowledge since transverse mounted powertrain front wheel drive cars became common in the 70s and 80s

[syedhaadofficial]

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[syedhaadofficial]

[rajaatta]

Please remember c50 in Yaris has a smaller body then c50 mounted on 1zz-fe
Both have different fill quantities.
When we do some repairs on these manual gear boxes and wash them thoroughly then next refill is not about the quantity mentioned in manual I always overfill it 100 or 200 ml to keep on safe side

[Xulfiqar]

Dry fill is never mentioned in owner manual, a lot of our Pakistani folks forget this point. The actual dry fill of any engine/gearbox is mentioned in the service manuals (honda, mazda. subaru, ford, chrysler, bmw, land rover etc) mention it. Others just simply mention to fill to a certain point and recheck after run.

E.g. the old ancient buzurg honda b engines mentioned in the service manual to fill a full 5 litres of oil in the engine if it was overhauled, while its oil change capacity is 4.5 litres.

With gearboxes its very critical to get the actual data, sometimes you need to find out the sub model etc. e.g. filling benz 722.9 autobox with red atf on a sedan with old pan has a different check temperature.

Or if you teardown a 3urfe its dry fill has an extra liter.

Our bhai here has got hold of the toyota motor usa manual for yaris. Its a different dimension, but what do we know - other than fix and repair them. 🤣

[capsat]

Toyota-C50--Transmission-Repair-Manual-RM1110E.pdf (4.1 MB)

C50 repair manual

[syedhaadofficial]

My gearbox is never opened, never repaired.

[syedhaadofficial]

Thank you @capsat however your PDF does not mention fluid quantity

[Xulfiqar]

The fluid quantity is done with drip check method.

Fill till it drips from fill plug with perfectly level car.