chris_smith
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| posted on 24/4/14 at 06:44 PM |
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Mx5 diff how to id
Bought an engine and box today from mx5 1.8l, so I'm on the hunt for a diff, however i believe there are several variants and ratios- non LSD,
VLSD, Torsen LSD etc etc, but does anyone know how to id them?
Many thanks
Chris
The secret of success is to know something nobody else knows."
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Smokey mow
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| posted on 24/4/14 at 07:08 PM |
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Try ths link 
http://www.miata.net/garage/diffguide/
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philw
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| posted on 24/4/14 at 07:41 PM |
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quote:
Originally posted by chris_smith
Bought an engine and box today from mx5 1.8l, so I'm on the hunt for a diff, however i believe there are several variants and ratios- non LSD,
VLSD, Torsen LSD etc etc, but does anyone know how to id them?
Many thanks
Chris
I think, vlsd is 1.6 only, 1.8 eunos has either type 1 or 2 Torsen, and uk 1.8 variants have open diffs, as for identifying them the 1.6 has lugs on
it somewhere(the miata link above will help with that) and the 1.8s if it's off the car then you need to have a look inside, as for ratios the
rs ltd whch is rare has a 4.3:1 as for the rest I can't remember off the top of my head 4.1: rings a bell, go and have a look on mx5 nutz there
is more info there
Must try harder
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philw
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| posted on 24/4/14 at 07:42 PM |
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There are also some you tube videos that may help
Must try harder
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PorkChop
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| posted on 27/4/14 at 09:28 AM |
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quote:
Originally posted by philw
quote:
Originally posted by chris_smith
Bought an engine and box today from mx5 1.8l, so I'm on the hunt for a diff, however i believe there are several variants and ratios- non LSD,
VLSD, Torsen LSD etc etc, but does anyone know how to id them?
Many thanks
Chris
I think, vlsd is 1.6 only, 1.8 eunos has either type 1 or 2 Torsen, and uk 1.8 variants have open diffs, as for identifying them the 1.6 has lugs on
it somewhere(the miata link above will help with that) and the 1.8s if it's off the car then you need to have a look inside, as for ratios the
rs ltd whch is rare has a 4.3:1 as for the rest I can't remember off the top of my head 4.1: rings a bell, go and have a look on mx5 nutz there
is more info there
I'm sorry, but there are a few inaccuracies there.
The Torsen LSD was a very popular option in Japan, but it wasn't a standard part. There are UK cars which came with Torsens from new.
What you must also remember that post 1993, only the European market continued with the (detuned) 1600. However, the larger 1800 diff, prop and shafts
were fitted. The early 1600 diffs are 4.3:1. You can however, get 3.6, 3.9, 4.1 and 4.3:1 ratio 1800 diffs. The 4.1:1 is the most common, you can get
a 3.6:1 Super Fuji diff reasonably easily (but are considered more fragile than a Torsen), but the rest are relatively rare.
The early 1600 diffs will all be bolt on shafts and will have stubs fitted to the diff. The very early 1800 size diffs also had bolt on shafts before
moving over to 1 piece push-in jobbies in '94 or '95. The early 1600 diffs can be open or viscous LSD.
One thing to remember is that the prop, shafts and diff are not interchangable between the early smaller 1600 diff and the later 1800 diff assemblies.
The driveshafts are different lengths and I believe a diffferent PCD. I also think it's a similar story for the prop, but I'm not 100%.
The easiest way to tell which diff you are looking at is to either have the rear cover off, or to look down through the driveshaft line and see what,
if anything, is blocking your view to the other side of the diff.
HTH.
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Slimy38
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| posted on 27/4/14 at 11:28 AM |
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quote:
Originally posted by PorkChop
One thing to remember is that the prop, shafts and diff are not interchangable between the early smaller 1600 diff and the later 1800 diff assemblies.
The driveshafts are different lengths and I believe a diffferent PCD. I also think it's a similar story for the prop, but I'm not 100%.
The easiest way to tell which diff you are looking at is to either have the rear cover off, or to look down through the driveshaft line and see what,
if anything, is blocking your view to the other side of the diff.
HTH.
Yep, the prop bolts are on a different PCD, the 1800 diff is also physically larger (about an inch or so).
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thefreak
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| posted on 28/4/14 at 10:39 AM |
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I've got a couple available if you're interested?
A standard open diff from a 1.8 for £50, or a Super Fuji diff for £15 as it's getting in my way now.
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chris_smith
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| posted on 28/4/14 at 11:48 AM |
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quote:
Originally posted by thefreak
I've got a couple available if you're interested?
A standard open diff from a 1.8 for £50, or a Super Fuji diff for £15 as it's getting in my way now.
you have U2U
The secret of success is to know something nobody else knows."
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