Toyota engines, crossmembers and gearboxes.

This is a mirror of the disappeared pages by Stepho. Revived through the internet archive.

Jump down to …
Engine codes.
Engine specs.
Crossmembers.
Gearboxes.

Engine codes.

Most of these codes came from Matti’s site.
Toyota uses the same option codes across most of its engines.

The first letter is the engine family (T or R for 1970-1977 Celicas).
The numbers before the first letter is the version number of the engine
(i.e. version 1, version 2, … , version 18 …).
After the dash we have the options as follows:

So …

Engine specs

Capacity = Bore² x Pi x Stroke x Cylinders _{/ 4000}
Eg for 18R
1968cc = 88.5mm x 88.5mm x 3.14159 x 80.0mm x 4 _{/ 4000}

Note: pitch is the distance between bore centres.

The most powerful factory engine for first generation Celicas
was the 18R-G (twin cam, no pollution control) for 140HP.

Cross members

Note, spring height depends on so many things and is so hard to measure that I have left it out.

Gearboxes

Notes: The same gearbox can have different length rear extensions in different cars.
The same gearbox can have different bellhousings in different cars.
However, the central part can still be swapped.
Exception is late AE70 T50 rear extension will not fit earlier T50 core.

W series gearboxes have a separate bellhousing.
Different bellhousings are used to connect a W50 gearbox to an R or M series engine.
Different bellhousings are used to connect a W55 gearbox to an R or T series engine.
Alloy W5# gearboxes are interchangeable with each other.
Alloy and steel W5# gearboxes are not interchangeable with each other.
W50 bellhousings do not fit the W55 gearbox and vice versa.
W55 bellhousings do fit the W56 and W57 gearboxes and vice versa.
W58 bellhousings are only compatible with W58 gearboxes.
All W## gearboxes after 1970 had the same output spline as the A## automatic gearboxes.

Some cars such as the MX13 Mark II came only with a W40 that had a unique rear extension and no W50 option.
It might be possible to use a W50 core combined with the old W40 bellhousing and rear extension.

All members of an engine family (eg 4R and 18R) can share gearboxes.
Input shaft splines may differ.
Flywheels and clutch diaphrams usually differ.

Some Celicas, Corollas and Coronas from around 1982 had the 3T-GTE engine with the alloy W55 gearbox.
Around this time the 18R-G was also available with the W55.
Different bellhousings were used.

Bellhousings for T and G engines seem to be compatible.
The Japanese GX51 Cresta has a 1G with W50 gearbox.
Any W50 and this Cresta bellhousing could be used behind a 3T-GTE.
The 3T-GTE normally has a bellhousing for a W55 but can use a 1G bellhousing (clutch slave on other side).

I have heard rumours that bellhousings for C engines are the same for either S or A engines.
One of these rumuors must be false.
Being compatible with A engines is more likely to be true.

The ST141 Corona uses a 2S engine mounted north-south.
Use this gearbox to put a 3S engine into older cars.
You will probably still have problems with the distributor hitting the firewall but you can use a crank angle sensor with an aftermarket computer.

Newer gearboxes have codes at the end.