How to work out what diff is on my 320i?

[mattrs]

As above.

Thanks in advance.

[Jim320i]

Go under the car mate.

On the rear of the diff, you'll spot a small metal strip, which will have the numbers on it. It will most likely be corroded/rusted up like mad so you'll need a wire brush or sand paper. I snapped mine off and sanded it to see what it was. Let us know!

[leeparkes]

What is the speedo indicating at 3K? (will give you a rough idea)

[kev76]

my h reg has a 4.1

[mattrs]

What is the speedo indicating at 3K? (will give you a rough idea)

Its on a breaker with the cam belt snapped so that methods out! Thanks any way.

[mattrs]

Go under the car mate.

On the rear of the diff, you'll spot a small metal strip, which will have the numbers on it. It will most likely be corroded/rusted up like mad so you'll need a wire brush or sand paper. I snapped mine off and sanded it to see what it was. Let us know!

Will do that tomorrow and post it on here then hopefully someone will know.


Failing that I vaguely remember someone saying you can turn and count something.... Ring any bells?

[Andyboy]

Up to mid 1985 they were 3.45, after that they were 4.1.....assuming it's a manual.

[Grrrmachine]

Basically, lock one wheel, then turn the other and count how many turns the prop makes relative to it. The trouble is that your options are 4.1, 4.27 or 4.45, if it's a touring, so actually counting the final part of a turn won't be easy.

Still, the difference between a 4.1 and 4.27 won't make a huge difference to your speed, acceleration or fuel economy at the end of the day.

[Ajsingh]

My 320 diff is on the receveing end of the 2.7 at the mo and 3k revs show about 66/67 mph....

Will soon be replaced by a 3.64

[mattrs]

Up to mid 1985 they were 3.45, after that they were 4.1.....assuming it's a manual.

E reg manual which I think makes it an 87... So probably 4.1?

[mattrs]

Thanks