How to check if you have LSD fitted without removing drive shafts


linh004

linh004

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Jun 25, 2014
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Hi Guys/Gals. Recently had my gearbox rebuild by TGM and I have to say, my car doesnt feel that grippy around corners as it used to! How do you check if you have a LSD fitted without taking out the drive shafts? I've searched and ive been getting a lot of mixed reviews, some say you can spin one wheel and if the other wheel turns in the same direction, you have a lsd where as other sites i've looked at says if the other wheel doesnt turn at all, it means you have a LSD

So guys, what is it? I've jacked my front end up making sure both wheels are off the ground and spun one wheel while looking at the other. The other wheel just stays put and doesnt spin.

I dont suppose TGM has stolen my LSD have they? This is really frustrating me out. I'll give them a call tomorrow..
 
I very much doubt they would steel your diff so I wouldn't go accusing them. The fact it feels different is probably in your mind
 
From my understanding a plated LSD both wheels will turn the same direction when turning one wheel, a standard helical LSD you turn one wheel and the other one does not turn. But the best way to check is take a driveshaft out.
Why would a company take your LSD depending on make £500 to £1500 and risk its reputation.
 
^^ this. Jack it up spin one wheel if the other wheel is still you have lsd if it spins the oposite direction you dont
 
That's true. I don't know why they would steal my LSD and risk their reputation. I've been doubting TGM would do this, its just a small possibility that I'm considering, the cars handling did feel funny after getting the car back from them after all. Maybe it is in the mind, or could perhaps be something like wheel alignment? =/
 
Couldn't agree more with you irf.

TGM have an astounding reputation within the Honda community and probably the reason you used them to re build the box. There is no way they would have taken the diff. I am pretty shocked that would cross your mind at all. It could be something as simple as the gearbox oil they put in.
 
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Yeah its gotta be in my head, I was highly doubting he would do such a thing. He seemed like a sound guy when I met him.. I'm just gonna put it down to wheel alignment then. Thanks guys lol
 
Its not gearbox oil, I supplied them with Honda MTF3. And yeah I saw on forums that he had good reputation so I decided to use him
 
What diff do you have?
I find mtf3 really kills my Kazz LSD so could be the oil....
 
What oil do you use in your gearbox with the kazz lsd Jesse. I recently swapped gearboxes with a friend which has a plated diff fitted. When I drove his car the diff was clunking quite alot. Now I have fitted it too my car only using mtf3 it dosent clunk at all when turning. Could this mean the diff is not working as good as it could? I'm not sure what oil he had in it when I test drove it.
 
I've been doing some trial and error with mine.
I used to run straight fusch gear oil(on opie oils and is for LSD and synchromesh trans) but since taking the PAS out its super hard to keep control of.
I tried MTF3 and as you say, clunking went away but so did the effect from it.
I've now got around 1L MTF3 and the rest(1.3ishL) is the fusch stuff.
I've used syncro80 before now and that was good aswell...

Get used to the clunking, if it's not making a noise it's not working usually. You should hear mine just coming off track lol
 
jesse888 said:
What diff do you have?
I find mtf3 really kills my Kazz LSD so could be the oil....
Click to expand...


It's just a standard helical diff that comes with s80 gearboxes from factory - another reason why I highly doubt TGM stole the diff. I just can't help but think the car handles worse which could be down to the alignment

I did rebuild the box using mfactory's master rebuild kit, which includes carbon synchros and the likes. Should I still be using Honda MTF3 even though the internals are different?
 
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Could be a whole range of things including your own mind.

Depending what they did to get the box out your alignment may be off?
Have you done any work recently?
Tyre pressure? No slow leaks?

What exactly are you doing that the cars not responding too in the same way you feel it did before?
 
No other works been carried out since. Tyre pressures are the same, no slow leaks.

It's not as grippy in the corners in terms of feel. As a lot of people mensioned when you have a lsd gearbox, the car would feel like it's on 'train tracks' - planted through out the whole corner. This is exactly how it felt before giving the car into TGM. It doesn't feel like this anymore. Just doesn't feel like it's pulling you through the corners anymore.. it's hard to tell really. Maybe if some ones close by I could drive to you and have you take it for a spin

As stated above, jacking up the front of the car and rotating one wheel the other wheel should not rotate. Judging from the results I got the LSD should still be in there. Maybe its just a case of wheel alignment. Unfortunately I'm unable to contact TGM as they've gone to France for some racing.
 
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All these tests of jacking up sound like bollocks.

Firstly surely the car should be in gear?
If not its a pointless test as you may be spinning the clutch rotor.

Then if the other wheel doesnt turn - your car is broken.

Am I missing something?
 
JohnTurbo said:
All these tests of jacking up sound like bollocks.

Firstly surely the car should be in gear?
If not its a pointless test as you may be spinning the clutch rotor.

Then if the other wheel doesnt turn - your car is broken.

Am I missing something?
Click to expand...
You don't need to be in gear because your driveshaft's go straight into your diff so by turning one of the wheels by hand you are testing the diff only, its got nothing to do with the clutch, the best way to check is to take a driveshaft out you should be able to see right through ( no pins).
 
Ignore what I said about the clutch. That wiuld be if the car was in gear and thr.pedal was depressed which is not relevant.

- But if you are not in gear then there is nothing holding your diff's annular ring - meaning it can spin. So this totally muddies the waters as far as what happens when you turn a wheel, it becomes a case of what has the least drag as to what moves and how.
 
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