Diff
Moderator: martauto
-
daimlerman
- **BANNED**
- Posts: 15968
- Joined: Mon Feb 27, 2006 11:00 pm
- Location: Grumpy Old Man
LSD in good order will cost in the region of £250....
It would help if we knew which E30 you own and the ratio you are seeking!
It would help if we knew which E30 you own and the ratio you are seeking!
Youth is wasted on the young.
-
gareth
- E30 Zone Team Member

- Posts: 11009
- Joined: Tue Jan 11, 2005 11:00 pm
- Location: hastings, east sussex
an LSD in good order for £250 is getting VERY hard to find now malc
Budget £350 at least for a good one, depending on size and ratio.
What's the car/engine?
Budget £350 at least for a good one, depending on size and ratio.
What's the car/engine?
Sole founder of Fe2O3-12V it's a lifestyle

LSD rebuilding / modification services provided, PM for details

LSD rebuilding / modification services provided, PM for details
-
daimlerman
- **BANNED**
- Posts: 15968
- Joined: Mon Feb 27, 2006 11:00 pm
- Location: Grumpy Old Man
It's me age,Gareth!gareth wrote:an LSD in good order for £250 is getting VERY hard to find now malc![]()
Budget £350 at least for a good one, depending on size and ratio.
What's the car/engine?
Things were always cheaper back in the dark ages....
Youth is wasted on the young.
-
daimlerman
- **BANNED**
- Posts: 15968
- Joined: Mon Feb 27, 2006 11:00 pm
- Location: Grumpy Old Man
A 320 would have had a small case diff with a ratio of 4.1....
You really need a medium case diff with a ratio of 3.64 or 3.73.
How do you identify a diff?
a)ratio will be stamped on a tag attached to a back plate bolt
b)size is best worked out by the number of bolts that hold the back cover on,small has 6,medium has 8.
Side by side,the size difference is easy to spot,from under the car,this is less easy to see.
The diff sizes are interchangeable between E30,the bigger unit just needs the prop shortening by about 13mm at it's centre joint.
Still confused on ratio choice?
4:1 gives 65mph at 3000rpm
3:64 gives 73mph at 3000rpm
These fiqures assume 5 speed manual gearbox.
You really need a medium case diff with a ratio of 3.64 or 3.73.
How do you identify a diff?
a)ratio will be stamped on a tag attached to a back plate bolt
b)size is best worked out by the number of bolts that hold the back cover on,small has 6,medium has 8.
Side by side,the size difference is easy to spot,from under the car,this is less easy to see.
The diff sizes are interchangeable between E30,the bigger unit just needs the prop shortening by about 13mm at it's centre joint.
Still confused on ratio choice?
4:1 gives 65mph at 3000rpm
3:64 gives 73mph at 3000rpm
These fiqures assume 5 speed manual gearbox.
Youth is wasted on the young.


