BRAMMER

iTrader: (23)

Curious to hear what others are using and what results as I'm not 100% happy with mine.

ajamesc

Ive got what they told me to fit in mine over the phone. A good quality synthetic 80/140.
Mine has castrol 75/140 that I got from jaguar

BRAMMER

iTrader: (23)

What does it feel like on the road, is it noisy in reverse and into slow corners?

ajamesc

I've not driven it yet as the engine is out. But I had it at my workshop when I did the beam. While I was moving it about it sounded exactly the same as my gripper did which I was a bit gutted about

Caddyshack

Mine is quite knotchy in reverse when cornering, you can hear it and feel it but mine hasn't done 100 miles yet. I think you can hear it at very slow speeds turning going forwards.

COLEYST200

iTrader: (3)

Sorry to say it looks like this is the down side to these diffs as iv had my diff out 3 times to check it over and it dose not seam to make any difference wot oil I put in it . It still bangs when turning slow and reversing

ajamesc

Can't be as bad as a gripper so I'm still happy if it won't break

Caddyshack

You don't get owt for nowt, it would seem

MK MOTORSPORT

iTrader: (1)

hi toby
dont you think there must be something wrong with them then
do you think when someone went in to buy a brand new supra drove off and the rear diff was clanking it would have gone back lol

ajamesc

It will be the up rate kit that makes it like that. My mate Dan has a supra diff in his saff with no kit in it that's factory quite

MK MOTORSPORT

iTrader: (1)

do they really need the kit then mate

ajamesc

Thats a good question as to be fair my mates dose lock both wheels. I guess the kit just makes it lock them sooner as it tightens it up. Mine is just a weekend toy so I'm not fussed and it can't be as bad as the gripper i had in it

Caddyshack

Yeah, I don't mind mine either. Mine is really tight, so much so you Can only just turn a wheel by hand but I think it may loosen up. I don't spend much time in reverse so can live with that. Based on Baras reputation I think mine is fighting fit. Very happy with it, I didn't mean to sound like I was moaning.

MK MOTORSPORT

iTrader: (1)

i think most people will get away with standard as not many running big bhp

Caddyshack

I suspect big hp and sticky tyres might require the extra locking but at least with the experiences in this thread people can make an informed choice so it is all good. Easy to swap it back to standard too.

You will have to try mine when I bring it up to you and see what you think

mark r

Bara done mine with weir kit
It's great had no problem just wish I'd fitted a shorter cwp as I prefer the shorter 3.9 I had in my quaife

Mark

BRAMMER

iTrader: (23)

I had a good chat with Bara today, I discussed oil and I'll be changing mine as it wrong for the kit that's fitted. I've ordered some 75-140 which I believe will sort the little issue I have with the feel at low speed

ajamesc

Lol they seem to tell every person they talk to a different oil grade lol
I got mine from jaguar they keep it on the shelf for there cars with lsd's

steveboyslim

Castrol B373 LSD oil works in these diffs and most other plate diffs, but don't use it if the plate diff is in a FWD gearbox.

Steve

fraser9764

iTrader: (3)

No wier kit in mine, and its silent.
Was thinking I would get it rebuilt and have the wier kit fitted at some point, but I think I will leave it based on the above.
I've no complaints with the diff as it is to be honest, it locks both wheels fine.

MK MOTORSPORT

iTrader: (1)

hi steve
what are you running a supra diff in ,what hp is it and does yours have the kit
mark

steveboyslim

Not me, one of my friends had a Supra diff in a modified Supra which had had the diff pre-load tightened, it made so much noise at low speed and when parking that my friend thought it was broken.
I suggested the Castrol diff oil which when used quietened the diff.
A diff cooler was also fitted later as the diff temperature increased beyond what Castrol recommended
It is the same grade fitted to the MK1 & MK2 escorts fitted with plate diffs, it was also used in Capri 2.8 axles when fitted with a plate diff, although they would have had a light pre-load.
I use it in my own cars, the ones which have a plate diff.
I discussed with Gripper Diffs and trialled in two diffs I built for YB powered Westfields and found the Castrol oil performed better, even with the later Gripper plates fitted to the diffs, with both set with the same pre-load.
The second diff was filled with a non-Castrol brand of LSD oil, that diff was more noisy and wore the friction plates sooner.
The Jaguar oil suggested may be the same oil, but I have not seen any to confirm.

Steve

ajamesc

The jag oil is synthetic the one you listed is mineral.

steveboyslim

Thought that might be the case, the much older Jaguars fitted with an LSD used the Castrol oil.

Steve

ajamesc

Chances are they have it as well then. Not many places keep oil that thick on the shelf. We have 85/140 as I work for Daf but it's mineral. They told me to use a good quality synthetic other wise I'd have used are oil like I did in my gripper

steveboyslim

You should see the oil in the cold, it has the consistency of honey, I have had to warm the oil just to get it out of the plastic bottle.
As long as it is oil specifically for plate diffs, the oil should be ok, normal diff/gearbox oil should not be used.

Steve

ajamesc

Yeah takes forever to drain a big truck diff and re fill it lol. The difference between 75/80/85 is very small. That's the cold viscosity

BRAMMER

iTrader: (23)

This is what I'm trying and I'll see if it helps any Castrol Syntrax Limited Slip 75W 140

Caddyshack

Let us know how you get on...maybe it can be made better with some experiment.

ajamesc

The only way your make it quite is by removing the wier kit. But it will not lock the wheels as quickly

Caddyshack

For my car, like yours, it is for fun so would prefer the locking some of the noises add to the event. I can live with mine, no probs.

ajamesc

The noise is the plates fighting against each other as the wheels turn at different speeds. The stronger Spring in the up rate kit has made the load on them stronger

BRAMMER

iTrader: (23)

have just swapped out the Millers CRX 75w-90 LS as the Millers was too thin and making the plates smack like a bastard, now running Castrol Syntrax 75w-140 LS though it and it's quiet as a mouse, the only noise was the smallest amount doing a 3 point turn

ajamesc

Good news then sounds a lot better

COLEYST200

iTrader: (3)

Hi lads just a small bit of info here as iv got a supra diff in my focos and I have the same problems as you lot it banging but to be onist it's not a bother to me as the car is used a lot on track but wot I have found when underneath and the hand brake was on I could roll the prop a fair bit . It was not the diff at fault but there is play in all 4 CV joints . Witch if you think about it as diff loads up in a turn and then the diff slips / jumps as its a clutch set up inside . Any way as there is play in the CV joint it lets the diff unload more so witch will result in a bang . I bet if you go under your cars with the hand brake on and roll the propshaft you will see wot I'm on about.
At the end of the day we are all running stuff under these cars that's over 20 years old

Ridgey

iTrader: (5)

That's why I put new joints in my drive shafts when I fitted the supra diff. I'm running a 80w140 syn and its a little quieter, and has performed well on track.

Caddyshack

I would say mine is near silent now and it has the weir kit and complete new driveshafts.

nixon_2wd

Do you have the Weir #1 kit or #2, Caddyshack?

Ridgey

iTrader: (5)

Changed back to the original 75w90 oil as the diffs should have. Not noticed an increase in noise and it'll have less transmission loss.
Didn't seem right running thicker oil in an attempt to reduce noise.

Caddyshack

I don't know, Bara built it and didn't mention an option.

My diff doesn't make much noise at all now unless on full lock turning the car round etc. It took maybe 300 miles to settle.

I have quaife up front and all I notice is that if I slowly turn in to my drive it feels like I have put the brakes on, you can feel the tyres begin to run out of twist, it is the same doing a 4 point turn, it is easy to stall the car on full lock....so you can tell how tight they lock up front and rear...probably more so on my light 205 pug.