Fitting Quaife LSD problems
Turbo Mini Forums

Righto, first problem was getting the pinion nut undone, but a volvo, some nosey neighbours, and a bit of scaffold bar it was soon sorted...





The next problem was getting the quaife to turn freely in the diff housing, even with the turned down diff bolts (thanks fastcarl) there are 3 ridges in the cover that need grinding pretty much flat, so attacked it with a tungsten carbide burr and gave it clearance:







Then had similar probs with the gearbox casing, so gave that the works (notice where i broke through into the cover plate bolt recess, should be ok though):








And now where Im completely stuck....

It seems the diff has all the clearance it needs concerning the gearbox casing and diff cover, and it now fits in the box with everything assembled (bar the diff side covers), but its way too far over to the left...





Now the reason it wont go any further over to the right is because the 3rd motion shaft bearing is in the way and the crownwheel physically cant go any farther over...







How am I going to get round this? I cant even get the LHS diff side plate on...



and its position in the box as it is will warrant even more grinding off the inside of the diff cover...

Any ideas anyone?

Really want to get this sorted tonight if poss...

Thanks

Joe

Edited by joeybaby83 on 9th Jun, 2007.

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Not being funny...but have you spoke to Quaife ?

Looks like there could be something seriously wrong if you are having to do that much to fit it ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

i was under the impression most, if not all lsds require some sort of machining to the gearbox/diff case??

the cwp alignment is pissing me off though, ill double check the diff bearings are fully on, mr 12 tonne seemed to think so, but you never know...

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

The bearing on the crwon wheel side does look a long way from the diff.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

are the bearings definately fully seated home joey ?

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

id hope so, i used a 12 tonne press, i will double check though

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

I had to do a similar amount of grinding to fit my Tran-x LSD, so i'd say that's normal, also had to machine the bolt heads down as you did. But mine certainly didn't sit over to one side like yours ....

WWW.TURBO-MINI.COM

I just love your "Volvo vice"!

ha, yeah, thinking about patenting the idea LOL

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

I'll send this link over to a friend who has fitted more quaifes than anyone on here... See what he says. :)

my quafie fitted in snuggly, no grinfing or anything, i would wait for turbodave to come back before you fit it all back.

yeah great, thats just what i wanted to hear philc, hahahah

thanks td

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

without meaning to sound like a willy, does the crown wheel fit on the other way?

Is that the new quaife diff that uses a standard CWP?

My old style quaife with an LSD CWP dropped straight in with no messing.

edit: looking at the pics its the same as mine, which suggests something is not right with the assembly of it there, it should deffo drop straight in without modifications.

Edited by danwebster on 10th Jun, 2007.

i pondered that yesterday, but theres no way it would fit the other side:







well gonna head down the garage now and check the bearing is fully home, which im 99% certain is, but hopfully im 99% wrong.

CHeers guys

Joe

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Will it move over if you fit the crown wheel on the same side of the diff flange, but turn the crown wheel through 180 deg and bolt it on the other face?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

No Axel, the CW is definately oriented and on the correct side of the diff.

Right, both diff bearings are fully home....

I spoke to Morson and he said i shouldnt have to go through any of this shit with a quaife diff, it should plop straight in with no case/cover mods.....arse.

Anyway, makes no odds, but i noticed that the JKD mk6 diff in the other box sits alot further inside the CW, so that the diffs flange (snigger) is basically flush with the left hand face of the CW:



...now the quaifes flange protrudes from the CW quite considerable (around 1/4"):



Maybe the quaifes flange is thicker? or even more likely the CW just needs machining out a bit 'deeper' so the quaife sits in it more.

Is this normal procedure?? I was under the impression all LSD CWs are the same?

Anyway your thought appreciated as always.

Joe

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

If you compare this picture of TurboHarry's setup you can see that the back of the CWP is flat, whereas yours does not appear to be.

This means that the inner flange is to one side of the gear. Yours looks central.

I'm afraid you may have some incompatible parts.

Attachments:

207.6kb

Edited by Paul S on 10th Jun, 2007.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

You can't go off that - as harry machined his quaife body to fit the 3.1....

does any one have a pic of a crown wheel to compare with the one he has?

axel, do you mean this side?


which is flat? not sure what you mean, but as harrys made custom parts from helical CWs then it doesnt matter reagrdless.

Yes, if someone can measure how deep the recess is (or how thick the flange is) on a SC CW is then i can compare it to mine, see if mine needs machining...

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Yes that's what I meant, but clearly that is not the problem.

As you say, I think you need to machine either the diff of the crown wheel.

Harry's crown wheel definately sits much further over, but he obviously machined the crown wheel to get it right.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

This is the answer from my friend over here:

*******************************************************

I do the tranny case and diff. cover in my little milling machine. It allows me to remove what I feel needed without getting carried away with a hand burr. It's not unusual to break into the side cover bolt holes. Once all the areas are relieved there should be no problem.

I have done only one Quafe posi and I found the OD to large to fit into the crown wheel bore. As the crown wheel belongs to the owner and the gear I removed fit I decided to set up and machine the crown wheel bore. The gear is tough so a carbide tool and good lathe is needed. The idea is a thumb press fit no extra play at all. This will allow the gear to settle on the flange. I think if the gear is offered up backwards you can tell if its the smallest hole or the flange counter bore that is the problem. I seem to recall it being the flange but it was a year or more ago. I believe the gear needs to be properly fitted to the posi then he will have a better outcome. Let me know if this helps. Regards Steve

*******************************************************


Basically - are you 100% sure the crownwheel is fully seated onto the diff? If it isn't, once you modify it you will obviously be able to move the diff over to the right slightly.
If you remove one of the CW bolts, you should be able to identify if it is - or isn't seated fully.

Edited by turbodave16v on 10th Jun, 2007.

joey is this a brand new crown wheel never fitted to a diff before,

if it is you may ahve the prob , that daves contact mentionsa , the inner counter bore will fit over all LSD , but the outer locating bore [if its a MSC CW] will not git over the diff as it is about 0.016 " smaller that the shoulder on the diff, you may have bolted the CW up to the diff and not realised it is not acctually sitting in the recess,
it looks to me as someone has mentioned that the CW does not look like it is fully seated home on the diff body.
the MSC CWs are only a straight fit onto the MSC evolution LSDs, all else will need either the offending 0.016" either removing from ther od of the diff body of boring from the CW.

i have quaifs in the twinnie and nevde had this problem, other than the OD bore diffewrence, which i new form previous so machined to suit.

carl


carl


carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

right , ive just had a close up look at the pics joey, and realised that those bolts i sent you should be poking out the other side more than they are,

i'm saying you CW is not sat onto the diff correcrly as mentioned earlier for the reason i mentioned,

carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE