Salisbury Differential | FerrariChat

Salisbury Differential

Discussion in 'Maserati' started by VeloceOne, Mar 7, 2011.

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  1. VeloceOne

    VeloceOne Karting

    Jul 18, 2007
    87
    Hi all,
    Can any one point me in the direction of repair manual for a Salisbury diff such as those used in most older Maserati ( 3500, QP1 etc) I wish to do some basic maintenance on mine (seals etc) I think that is is a 4Ha. Many thanks.
    Kindest regards, Ian (107-1202)
     
  2. lavaux

    lavaux Karting

    Jul 18, 2009
    124
    Cully, Switzerland
    Full Name:
    Wilfried Vogel
    I believe the rear axle is the same (or very similar) as in the Jaguar Mk2. In the Heynes workshopmanual the rear axle is very nicely descrbed.
    I had until now no problem with the rear axle, beside the simmerring at the input was leaking. This is easy to change: the biggest problem is to get the old, leaking simmerring out. Drill or 3 little holes into the metal part of the simmerring and screw selftapping screws in. Then you can grip these screws to pull the old one out.
    Wilfried/Lavaux
     
  3. JulianMerak

    JulianMerak Formula 3

    Thanks for the [ old ] tip.
    I have ordered the Haynes manual which should come in handy for the leaky diff and the front suspension rebuild too
    Julian
     
  4. thecarnut

    thecarnut F1 Rookie
    Rossa Subscribed

    Apr 22, 2006
    3,008
    Atlanta
    Full Name:
    The Car Nut
    The most common differential leak is from the pinion seal (where the drive shaft connects to the diff). As mentioned before, the seal is the same as a Jaguar.

    It is important that the pinion is properly torqued. Easiest way is to mark the nut and count the turns when you remove it. Change the seal and then put the nut back exactly in the same position you found it.

    Ivan
     
  5. JulianMerak

    JulianMerak Formula 3

    Thanks Ivan, much appreciated
     
  6. BartvanderWeiden

    BartvanderWeiden Formula Junior

    Nov 29, 2008
    383
    Netherlands
    Full Name:
    Bart van der Weiden

    Hi Julian,

    The old seal versions consist of a strange big diameter plate with an asbestos cord in it that after years normally starts leaking. There are alternative versions available with a simmering (modern seal), watch out because there are 2 different diameters in use. So measure before ordering!

    Ciao,

    Bart
     
  7. f308jack

    f308jack F1 Rookie

    Jun 7, 2007
    4,300
    Cape Town, South Afr
    Full Name:
    Jack Verschuur
    Bear in mind, that more often than not a leaking seal is caused by a worn bearing.
    Also bear in mind, that w rongly torqued flange-nut may cause bearings to wear prematurely, and ultimately cause the pinion to loose it's exact loacton on the crown-wheel, causing wear and noise.

    Diffs are not rocket-science, but are easily disturbed. Setting one up correctly is a rather precise process. Do it correctly and you'll enjoy longevity and quietness..

    Best,

    Jack
     
  8. JulianMerak

    JulianMerak Formula 3

    And Thanks Bart and Jack too

    Don't expect any progress on this sub project any time soon, got to wait for that manual!!
     
  9. redfred84

    redfred84 Formula Junior

    Dec 24, 2010
    570
    SF Bay Area, USA
    When your manual arrives, and proves itself satisfactory for the task, can you describe the exact copy so we may know which one to get?
    Many Thanks, RF.
     
  10. JulianMerak

    JulianMerak Formula 3

    Yes of course. I have bought the Haynes manual for the Jaguar Mk 1 and 2 and will see if it actually helps [ might be a while before I get to the diff but happy to let you know ]
     
  11. jonack

    jonack Formula Junior

    Jul 3, 2007
    290
    Berkeley, California
    Full Name:
    J. Clark
    The main input seal in these differentials is made of leather, they dry out over time, thus leaking. But worse, letting in humid air which can lead to rust on input shaft bearing.
    Most of these old cars have tended to sit for long periods of time...that's when the bearings rust..
    I'm amost positive Jaguar made the Differentials for Maserati, as Jaguar supplied other parts for those early cars..

    Parts for the differentials are easy to obtain through Jaguar parts sources, I.e X K's Unlimited has all the necessary bearings, gears, rings, clutchs and plates (for the limited slip versions), and seals.

    The whole kit for my Limited slip dif, was maybe $200.00.
     
  12. thecarnut

    thecarnut F1 Rookie
    Rossa Subscribed

    Apr 22, 2006
    3,008
    Atlanta
    Full Name:
    The Car Nut
    My advice is that unless you know there is definitely something wrong with the differential, simply replace the pinion and rear cover seals .... and stop.

    Chances are you will mess something else that was perfectly fine by digging into it. These differentials are very robust and seldom give much trouble. Just my 2 cents of advice.

    Ivan
     
  13. JulianMerak

    JulianMerak Formula 3

    Now that sounds like a perfect plan to me!
     
  14. rentsch1961

    rentsch1961 Karting

    Oct 22, 2012
    83
    Geneva, Switzerland
    Full Name:
    Alain RENTSCH
    Hello,
    I have just done a first test drive in the Indy I have bought unseen.

    There is a "woooooouh" noise coming from the rear axle.
    It's light when accelerating and VERY loud (more loud then the engine noise) on the overrun.

    Can anybody tell me how to investigate this problem?
     
  15. eogorman

    eogorman Formula Junior

    May 10, 2005
    322
    Buhl, ID
    Full Name:
    Eugene O'Gorman
    First make sure there is oil in it. It may be the gears are not aligned. This could be caused by one or more bad bearings. The rear cover plate is easy to remove and inspect gears.
     
  16. 5000gt

    5000gt Karting

    Oct 8, 2015
    90
    Have you checked the oil level?
    If the lever is okay then I would put the read differential on jack stands and put the car in gear. You should be able to tell if the noise comes from the outer bearings or the differential.
    I had the same issue on my differential and found out that the spider gears were shot.
    Most competent shop should be able to rebuilt the rear end since all parts are available new.
     
  17. rentsch1961

    rentsch1961 Karting

    Oct 22, 2012
    83
    Geneva, Switzerland
    Full Name:
    Alain RENTSCH
    Hi,
    At last I had some time to put the Indy on axle stands, in order to look at the rear axle.

    There were almost no more oil inside... but itsn't the cause of the noise.

    I can move the transmission shaft slightly up and down if I grip it just in front of the axle case...
    Then I suppose a bearing of the input shaft has failed? Or can I just have lost the preload?

    Thank you for your input, Alain.
     
  18. vlasic ludovic

    vlasic ludovic Karting

    Apr 13, 2015
    60
    Nice France
    Full Name:
    Vlasic ludovic
    You have lost the preload !

    La flasque n'est pas sérrée au couple, donc en accélaration les 2 roulements sont en contrainte et cela ne fait pas beaucoup de bruit, puis en décéleration le bruit est plus fort, puisque c'est la couronne qui donne le ton !
     

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