Differential Dilemma

[Lof8]

I mean this nicely...but get facts straight before throwing a member under the bus for your ignorance

I appreciate the advice. However, at no point did I throw the guy under the bus. I didn't accuse him of sending me the wrong diff. I did express that I am disappointed that the diff is missing a couple of pieces that I would consider standard.

If the diff is missing the ID tag and a bolt, I think it should be advertised that way.

I will certainly be happy when I can confirm that this thing is a 3.25 LSD, and if that is what I find, I will certainly post that in the feedback. It doesn't change the fact that some pieces are missing.

[urbancynic]

I appreciate the advice. However, at no point did I throw the guy under the bus. I didn't accuse him of sending me the wrong diff. I did express that I am disappointed that the diff is missing a couple of pieces that I would consider standard.

If the diff is missing the ID tag and a bolt, I think it should be advertised that way.

I will certainly be happy when I can confirm that this thing is a 3.25 LSD, and if that is what I find, I will certainly post that in the feedback. It doesn't change the fact that some pieces are missing.

I dont know either of you and I usually try to stay out of these things, but one question....

Did you ask the seller about the aforementioned pieces before you purchased the item?

caveat emptor.


Also, to help you out.... count the teeth and figure out the ratio.

[nrubenstein]

You're the first person that I've ever heard of who gives a crap about the ID tag. Here's a hint: the diff tag is not part of the diff and it's not normal to expect it. After 21 years, my experience is that most of them are either missing or unreadable.

So yeah, for future reference, if you care about a tag that has absolutely no functional or cosmetic value, then you need to specify it up front.

[Lof8]

It seems I was completely out of line to expect the tag. Now that I know how to confirm the specs, its not such a big deal. Thanks for the help fellas.

[b*saint]

You don't even need to rotate it to know its an LSD. Look at the fucking clutch disc housing! Do you see any visible spider gears!

[Wanganstyle]

The smaller gear is not in view to count the teeth. I have to disagree that the tags are lost often.

you have already pulled the rear cover, you can creatively figure out a way to count the pinion gear - I have done this countless times myself :)

I disagree with your one out of one experience, If i come across a S325 tag i would send it to you for $0 to help you out in your seemingly very distressed situation.

[Wanganstyle]

I bought a BMW lsd unit out of a wrecking yard, it was from an 80's 5 series with a medium case diff. Tag said 4.27, but the actual ratio inside was 3.64. WTF?

Now I don't trust the tags anymore. Rotate to verify or count teeth and do the math.

I NEVER trust the tag.

open the sucker up, count the teeth, inspect the LSD for bolts falling out@@@@@@@@@@@@@@@@@



NEVER. I don't trust anything on a 20++ year old ancient artifact, too many S tags or wrong tags put on diffs or lost...... :)

[slammin.e28]

.......or stolen.

[TimR]

I allways put a couple bolts in both sides, get a couple pipes and see how hard it is to turn, there not lockers but you shouldn't be able to just turn it, there are new 3 & 4 clutch paks out there, allways use BG LSDII additive.

[Rigmaster]

open diff looks like this inside



count revolutions of flanges to driveshaft as stated above

I mean this nicely...but get facts straight before throwing a member under the bus for your ignorance

Even though this pic is of an open diff, you can clearly see the teeth on the pinion (the "small" gear). You should also be able to see and count the teeth on the pinion in your LSD, then count the teeth on the ring gear ("big" gear) and do the math.

[Jean]

I allways put a couple bolts in both sides, get a couple pipes and see how hard it is to turn, there not lockers but you shouldn't be able to just turn it, there are new 3 & 4 clutch paks out there, allways use BG LSDII additive.

What?

[TimR]

If you can easly turn the axle flanges in oposite directions like an open diff turns by hand or a little pressure with the pipes on a LSD the clutch pack is shot, no LSD. This can be fixed and cluth packs with more than stock clutches are available.

[shiboujin]

If you can easly turn the axle flanges in oposite directions like an open diff turns by hand or a little pressure with the pipes on a LSD the clutch pack is shot, no LSD. This can be fixed and cluth packs with more than stock clutches are available.

This is ONLY true if you hold the diff input shaft in place solidly. Otherwise, you can freely spin the axles in opposite directions. LSDs react on torque difference.

[TimR]

Thats not been my experience with testing but it sounds like your speaking of diff being out of the car, i was inferring still mounted, sorry. if the clutches are shot and there's no LSD left, here where they are [url]http://www.bimmerworld.com




Differential Type:
188 210
: Motorsport Limited Slip Clutches X


4130 chromium-molybdenum stock, ceramic coated, 2mm thick. May require professional installation. Dog-ear plates should be flipped if not replaced on installation. 188 parts fit medium case housing limited slip units (E30 and E36 6 cylinder and others), 210 discs are for large housing differentials (Euro 3.2L Evo E36, E46 M3, most V8/V12). Stock slip units require 2 clutches.

Sold per disc
188 $75.00
210 $125.00

[shiboujin]

You need to specify things like that. The ramp angles inside the LSD require a torque difference between it's input shaft and the axles in order for the LSD to lock. Otherwise things will spin freely. If the input shaft has no resistance, the two axle stubs will spin freely.