Time to start explaining

[eeyoreish]

Better than Syntrans?

[CarBuff]

Barry is probably using the picture on the bottle to re-assemble his 'box. 😉

[Barrykearley]

48 minutes ago, eeyoreish said:

Better than Syntrans?

Syntrans isn’t suitable for the lsd. This stuff has been proven by a certain member on here.

an awful lot has changed in oil technology over the last 30 years. This stuff is apparently the best available 

[fjmuurling]

Just a pic of the oil?

No pics of the gearbox internals? 😱😮

[Giniw]

@Barrykearley

Apparently a GL4/GL5 oil is basically a GL5 oil.

If I understand it well the MT-1 rating ensure the oil is even less corrosive than the worst accepted corrosion for a GL4 oil, so that would be OK from the corrosion point of view.

But on the other hand, I have just read that because the GL5 has more High Pressure additives than a GL4, the protective layer which forms on the surfaces of the gearbox internal are stronger than copper based material, so when the protective layer wears over the synchro rings, it actually rips a bit of the copper based material (but it's OK for steel though.)

An interesting explanation (in French) about the copper corrosion subject, where the guys tells it is fine to use GL5 and MT1 oils
https://www.landroverfaq.com/viewtopic.php?t=3145

An interesting explanation (in English) where the author states it's OK regarding copper corrosion indeed, but not regarding synchro wear because the protective layer rips a thin layer of copper every time it is destroyed ...
https://www.widman.biz/uploads/Transaxle_oil.pdf

I am not knowledgeable on that subject so this may be a nonsense. But I am just sharing what I just read since I had to flush the Elan gearbox last weekend ... after reading the first one so I too poured GL5 MT1 in it ... I am seriously considering flushing it again after I found and read the second explanation ...

 

[Andyww]

6 hours ago, Barrykearley said:

Syntrans isn’t suitable for the lsd. This stuff has been proven by a certain member on here.

an awful lot has changed in oil technology over the last 30 years. This stuff is apparently the best available 

Yes thats a problem, a LSD in a transaxle, because the requirements of the oil are mutually exclusive, the LSD needs a friction modifier but the syncros dont like that.

So the oil needs to have a small amount of friction modifier. Too much and the syncros are slow, too little and you get diff chatter on tight bends.

[Barrykearley]

Give it another couple of years and i will probably be replacing the synchros again anyway at this rate. Really need an off the shelf gearbox conversion to eliminate the un1 frankly

[silverfrost]

Vosprung duch technic 6 speed conversion would be nice, and plenty of used transmissions to choose from 

[Barrykearley]

I agree - that would be nice. 

Anyway - my box is ready so need to try and sneak some time to collect it - bloody works getting in the way

[silverfrost]

No need to rush Barry,  I am sure you will only end up finding something else to fix soon lol 

[Barrykearley]

Gearbox collected at 0630 this morning. All looks very lovely externally - hoping to get some time Saturday morning to put it all back together.

bearings were showing signs of rust from where the box had been laid up for a long period before my ownership - hence why the chap replaced them. Second gear missing 3 dog teeth and didn’t look like it would have lasted much longer at all. Looks to be sealed nicely with new bolts, oil seals and gaskets. Only time will tell. 

Looking forward to trying this lsd and seeing just how much it improves things. Gearbox chap seemed confident I won’t snap the shaft with the LSD unit installed - so I’ll take that as a challenge. When and if I do - he has replacements on the shelf. Interesting chap to chat with - he’s got lots of experience historically with these units in race cars - and they used to weld the two shafts together to stop them breaking !

[tomcattom]

I'll be interested to see what difference you notice with the LSD. It's something I am considering doing to mine in the fullness of time. I've fitted LSDs to one of my other cars and that made a noticeable difference, but it is FWD, so I'll be interested know how noticeable to difference is on the Esprit.

[swindon_alan]

I've got an LSD on my V8. It does stick very well in the dry but you have to be very careful in the damp or wet and particularly on roundabouts as it has a tendency to let go (the mid engined car trait). I know this very well from experience..!

[Giniw]

1 hour ago, swindon_alan said:

I've got an LSD on my V8.

Is it an original one? (I am not sure whether they were available for the V8)

[swindon_alan]

No, they were never fitted as an option. This was done by a previous owner at the same time as he upgraded the gearbox to a Quaife through GTO (exclusive outlet).

https://shop.quaife.co.uk/renault-un1-lotus-esprit-v8-helical-upgrade-kit

[Giniw]

Thanks =)

[swindon_alan]

On 08/01/2019 at 20:44, eeyoreish said:

Better than Syntrans?

@Barrykearley has to go for Miller with his LSD as he canes his cars to the limit. Of course, that is easy to do with a four pot. I stay with Syntrans even with an LSD as it is so much, much harder to push it all the way being a V8...

[Giniw]

1 hour ago, swindon_alan said:

Of course, that is easy to do with a four pot.

Indeed, we all know the v8 blows up before it reaches it!

 

[swindon_alan]

Ah there there, denial is a very sad thing to behold...

Inadequacy cover up is a very common trait in human males.

[Barrykearley]

4 hours ago, swindon_alan said:

@Barrykearley has to go for Miller with his LSD as he canes his cars to the limit. Of course, that is easy to do with a four pot. I stay with Syntrans even with an LSD as it is so much, much harder to push it all the way being a V8...

Never had mine over 55mph and never take it over 3000rpm

[swindon_alan]

[Barrykearley]

heres the busted bit. 

Drive shaft cups cleaned and pinned into place - just awaiting the second pair of hands to lift it in

[Barrykearley]

Box in and car back together. Quick blast up the road - and yep - that box feels lovely.

its a bit wet outside - when it breaks traction is wiggles just nicely and gets the power down. I must say I’m impresssed.

the gear changes feel very nice and smooth - it’s never felt that nice and it wasn’t bad before. Think that oil @CHANGES put me onto was a fantastic choice.

one very happy bunny. 

Wifes been niggling that I’ve been in the garage again instead of doing stuff round the house. Oh well......

[Barrykearley]

On 11/01/2019 at 11:55, tomcattom said:

I'll be interested to see what difference you notice with the LSD. It's something I am considering doing to mine in the fullness of time. I've fitted LSDs to one of my other cars and that made a noticeable difference, but it is FWD, so I'll be interested know how noticeable to difference is on the Esprit.

I’ve had a full weekend of use out of the Esprit since the vans shagged, Fiat 500 in bits cos a rear brake cylinders shit it’s guts out.

Nice mix of wet and dry road driving - in the wet it’s fun - and slithers just nice. It is very predictable and controllable. I’m the dry - well it really slams the car down the road in a way it’s not done before. I’m very impressed with it and glad I changed it. The difference is very noticeable in both wet and dry.

[Barrykearley]

 

I can confirm after much effort that a fluffy sized dog and a Danny do not fit safely or even comfortably in an S4s 😢.