18 replies to this topic

[steve1360cc]

How much does a 2.7 Differential cost? I have £1000 to make my 93 cooper SPI more practicle for motorway use as i start college so i have to use it more and advice greatly appreciated

[Jake Blues]

Talk to The Stig, he had one for sale on Sunday at Stanford Hall....

[Mini_Magic]

EDIT: Silly comment, not sure why I posted it really. Saving myself the embaressment.

Edited by Mini_Magic, 10 September 2007 - 02:50 PM.

[Ethel]

The easiest solution would be taller tyres.

[Big_Adam]

Go give guessworks a bell. He dose gearboxes for £250 complet refurb. Their lovely units. All sealed, cleaned, full set of gaskets with the box new roller bearings.

The lot!

[steve1360cc]

CHEERS ALL

[Guess-Works.com]

2.7 costs totally depend uppon availablity, the one the stig has, think that was up for £100... which can be considered cheap !

[Jake Blues]

How much does a 2.7 Differential cost? I have £1000 to make my 93 cooper SPI more practicle for motorway use as i start college so i have to use it more and advice greatly appreciated

To be honest, TC's Cooper Spi (with a 3.1 diff I think) is more than practical for motorway driving...and we do loads in it!!

[biggav]

i have one here in a packet awaiting fitting...... i paid £40 for it, not uncommon for mpi users to change them to give better acceleration... some of the bigger parts companies were offering them for around £300 new.

[Jake Blues]

i have one here in a packet awaiting fitting...... i paid £40 for it, not uncommon for mpi users to change them to give better acceleration... some of the bigger parts companies were offering them for around £300 new.

Just to clarify, my understanding, having talked to people who know about these things is the 2.7 diff is fitted as standard to the MPi which gives it better long distance use but poorer acceleration especially as the MPi is underpowered as standard. Some people change that diff for a 3.1 (fitted as standard to an SPi) to give better acceleration with minimal loss of long motorway legs. The reason they are hard to come by (which ought to put the price up) is the relatively few numbers of people stripping down the newest mini engine/box to change the diff. The reason why biggav's was only £40 is unknown to me! Perhaps because no-one wants them unless they are only doing long journeys and aren't too worried about getting away from the lights?

[Sprocket]

Auto gearboxes are fitted with a 2.7:1 FD

[adam25]

I always thought you couldnt put the auto diffs into the manual boxes??? the one ive got is huge and has an extra little unit before the pot joints.

[Sprocket]

If the auto uses the same drive shafst and pot joints then the diff must be the same.

[Dog]

aaaaaaaaaaaannnnnnnnnnnndddddddddd... I heard Auto's, well early autos, used the Cooper S Drive shafts, the thicker stonger one?

Also, if you find teh 2.7 a little pricey, why not go for a 2.9, just as good, but lighter on the wallet!

[Sprocket]

We are talking final drive here, so the diff is infact irrelevant, the crown wheel and pinion will be interchangeble which ever output shafts you wish to use.

Yes early autos used the hardy spicer output shafts and joints

You can tell the difference between the Cooper S and the rubber coupling output shafts simply by looking at them. Cooper S shafts have a 5/16 threaded female thread and a bolt in the center of the shaft, the rubber coupling type has a male thread and a nut. What is also distinguishable, and this is what makes the cooper S output shafts stronger, is the cooper S shaft is the same diameter all the way along right up to the splines, the rubber coupling type has a narrower profiled shape similar to the more common pot joint type.

This the diff output shafts we are talking about and not the drive shafts. Dont get confused with what is Cooper S and what is not, there are loads of people selling stuff on Ebay for large sums of money labled as Cooper S and it is clearly not.

Edited by Mini Sprocket, 12 September 2007 - 12:00 AM.