316i gearbox fit onto 318iS??

[Rupe30]

Hi just bought a 318iS engine but without the gearbox, just checking, will my 316i gearbox bolt on?? theyre M40 engines.

Cheers!
Rupes

[E30Mark]

This has been discussed before! can't remember the outcome. You'll need a 318is prop which makes me think the gearbox is different...

[Chris-W]

Part numbers are different, but can't say for sure about fitments.

Re the prop - isn't that a length thing as the M42 sits further back?

If you can't use it and struggle for a 318is 'box, let me know.

[Rupe30]

theres a guy selling his 318is box 4 £50 its done 120,000 miles, sound alrite? can u get me a better1 chris?!

[Chris-W]

Same miles, same price

[m-dtech]

same bolt pattern the difference is a big rubber doughnut that joins the prop to the gearbox.

measure the distance from the m40 engine mount hole to rear of engine and also measure the distance from m42 mount and rear of engine, if both the same then you have no problems.

hth

[Rupe30]

so anyone know if it will deffinately fit or not!? no1 done it before?

[Demlotcrew]

same bolt pattern the difference is a big rubber doughnut that joins the prop to the gearbox.

measure the distance from the m40 engine mount hole to rear of engine and also measure the distance from m42 mount and rear of engine, if both the same then you have no problems.

hth

The rubber coupling is the same for all E30 cars (except M3, 320is and IX models)

The difference is the gearbox output flange is quite a bit longer on the M42 box and some of the internals are different (stronger)

I have a mint 318is/M42 30k miles box for £100

Andrew

[m-dtech]

i have prop and gearbox here you can have for £100

you will prob need gear linkages aswell.

[Rupe30]

will i need the prop then? how many miles has ure box done 'm-dtech'??

[Theo]

I also have an m42 prop and a very good gearbox. Where are you based?

[Rupe30]

I also have an m42 prop and a very good gearbox. Where are you based?

In Stratford upon Avon, how many miles has the box done??

[Gunni]

The diffrence between the two boxes is the output flange,
the M42 one sticks out a little bit far back then the M40 one,
by changing out the flange you can use your M40 driveshaft or vice versa..

[Theo]

I'm based in Kent, so quite a long way to collect. Mileage is 160k - but a very good box, also £50.

[Rupe30]

so your telling me i need to get an m42 (318iS) box but if i swap the `flange`over (not sure which part you mean???) i can mate my 316i propshaft to the 318iS box?

[Gunni]

the flange is the unit that bolts to the driveshaft from the gearbox
by looking at the two you´ll see the diffrence right away.

[Rupe30]

rite so just got to get a 318iS box then and swap the flanges over, wkd cheers guys.