my diff is a what?

[Hyperion]

Hi guys
i had a chance to get uder my car this weekend because i wanted to find out what diff i had, so anyway i get under ,clean the tag and it tells me this:
40:11 10 89
huh?
someone please decipher this for me.
thanks

[StuBeeDoo]

40:11 ratio = 3.64:1.
40 (crown wheel teeth) divided by 11 (pinion teeth).

[Hyperion]

thank you StuBeeDoo

[daimlerman]

That should give around 75mph at 3000rpm.

[StuBeeDoo]

That should give around 75mph at 3000rpm.

24.1mph/1000rpm in 5th IIRC.

[MrDazzle]

That should give around 75mph at 3000rpm.

24.1mph/1000rpm in 5th IIRC.

On stock wheels and tyres...

[cliffybabe]

Hi guys
i had a chance to get uder my car this weekend because i wanted to find out what diff i had, so anyway i get under ,clean the tag and it tells me this:
40:11 10 89
huh?
someone please decipher this for me.
thanks

no s or anything??

[StuBeeDoo]

Hi guys
i had a chance to get uder my car this weekend because i wanted to find out what diff i had, so anyway i get under ,clean the tag and it tells me this:
40:11 10 89
huh?
someone please decipher this for me.
thanks

no s or anything??

Not a slipper then. Mine only had numbers too. IIRC, someone said "A" denotes a factory rebuilt unit.

[gooner1]

That should give around 75mph at 3000rpm.

Aaah, thats about what mine does but cant make out the numbers on it.
Thanks for that Hyperion yours would,nt be an 86 cab would it?

[Hyperion]

no other letters at all, just those numbers, cliffy.
my car is a '90 325i baur (auto) gooner.

[royale30]

What do they say if they are a slipper? Doing a donut always seems a bit wrong when testdriving a car

[StuBeeDoo]

What do they say if they are a slipper?

First character is "S", followed by no. of crown wheel teeth, then no. of pinion teeth.