Drive shaft shortening
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  1. #1
    My name is Martin 30psi's Avatar
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    Drive shaft shortening

    I need a single driveshaft shortening in order to use a Quaife diff in my Datsun.

    Any idea who can do this at a competitive rate? Recoprop have quote circa £300 for a a shaft to be made as they think shortening a shaft will be unreliable for a car with any decent power.

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    Official RnS Addict fozwanger's Avatar
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    The problem is that the shaft is heat trested.
    To shorten your shaft and re-spline is not easy. You would either have to treat the shaft to anneal (un case harden it) then have the shaft machined, then re-treat it.
    This will also raise a few issues as this will change the grain structure and molecular structure of the material and thus comprimise the mechanical properties of the shaft.
    If you can machine the shaft as is (hard metal machining, rather you than me) then you will go thru the case hardening (40 thou deep max / approx 1 mm) and the shaft would be useless.
    The other reason that a new one is pricey is that they are made from a really high grade alloy steel, and this alone will be a lot of money, then the cost of the heat treatment.

    The new one is the better option. Don't Quaife do one to suit?

    That isn't a bad price, but cheaper alterbatives will prob not be as good.
    Hope this helps.
    Last edited by fozwanger; 25-05-2009 at 21:40.

  4. #3
    My name is Martin 30psi's Avatar
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    Yeah they explained that because they don't know what and where the shaft has specifically been shortened it makes shortening the shaft guess work and couldn't guarantee its strength.

    I don't mind getting a new one made up, I just want it to be reasonably priced.

    The diff looks just like a Quaife in how they work but was supplied in an import Nissan. It's an IRS rear end, I've made up one shaft by using the shorter sided shaft on the long side of the car coupled with the larger CV joint that needs to be used with this diff, so that's one shaft I don't need to make.


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  6. #4
    Official RnS Addict fozwanger's Avatar
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    I reckon that's the price your gonna be looking at generally.
    I did use someone else once, I'll have to rack my brains to remember the name.
    You could always get a local m/c shop to make you one but it'll prob work out the same price

  7. #5
    Dragging not Bragging vince-305's Avatar
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    I was getting my shafts done bye a company on LESSONS HILL orpington who apparently supply shafts for mclaren but they seemed to sit on them due to a big new contract in the end i took mine else where

    They did say that they would send them off to get de-temped do the work then send them back to be re-tempered and the pair worked out to be around £180 but as i said they sat on them for 6 wks and i was in a rush might be worth a try

    They also had what appeared to be ATB parts being made while i was there
    Bit'z 'N' Piece's
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