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Thread: Undersize spare & locking hubs

  1. 19th September 2010, 10:37 PM #1
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    Question Undersize spare & locking hubs

    I have recently bought a stock P38 and plan on fitting some oversize tyres. After a recent conversation with Paul I realised that my main problem was going to be where to store the spare. I'm aware that there are quite a few threads about how to go about doing this, with the options generally being:

    • Get a swing out wheel carrier (expensive)
    • Carry the spare in the boot (wastes a lot of space)
    • Enlarge the spare tyre well with a big hammer (limits tyre size)


    While I know that you cannot carry a stock (undersize) spare as this will destroy the transfer box if you use it, if I understand correctly, fitting locking hubs should prevent this (if you unlock them). The big flaw here is when you are offroad - as you'd be switching to 2wd (although I bet you could last a little on 4wd if you're close to civilisation).

    I've found a place claiming to sell hubs for a P38 here for about USD100.

    Am I correct that this should work? I'm sure it's a pretty bad option for most, but what to confirm that it is another option...

    Thanks

    Jonathan
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  2. 20th September 2010, 01:04 AM #2
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    PaulP38a
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    Amazing! I never even considered this as an option on a P38, let alone thinking someone actually making such a device. I have NFI how a P38 would handle as a 2WD/RWD vehicle but it would make power slides a lot more fun

    I'm tempted to buy a set just to see what they do. Surely something has to screw up somewhere? On pre-99 2W-TC vehicles maybe ok, on post-99 4W-TC there's gotta be some confusion, although TC is based on ABS not wheel drive I guess.

    If you are not fussed about the other options (carrier, spare in boot etc) I would strongly recommend sticking with stock 29" tyres. Nothing wrong with them at all... your speedo stays within spec and you can get almost anywhere with the right tyres... prefer 16" over 18" rims for wider selection of tyres.

    Sure, I run 33"s but mine has a heap of mods to cater for it, including lift kit and spare tyre carrier. Even without the lift, my P38 would sit 2" taller than stock but the scrubbing would make it unusable. The lift kit avoids scrubbing on all but the lowest EAS setting and adds another 2" of lift. NB: makes it harder to fit in my garage and underground car parks.

    Don't worry so much about look, and focus more on capability. Just get a good set of 29" MT or ATR tyres and your P38 will leave those Toyo/Jeep/Patrols in it's dust, if doesn't already... I've had my P38 leave other/lesser 4WD's wanting even when running my other 18" rims and road tyres.

    Cheers, Paul.
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  3. 20th September 2010, 06:59 AM #3
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    Why on earth would you fit free wheeling hubs to a constant 4wd vehicle (of any sort)?

    Completely pointless waste of time and money.
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  4. 20th September 2010, 07:40 AM #4
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    Does the P38 have a lockable transfedr case such as the Disco1 or a viscous one like some RRC?

    If it doesn't lock then FWH wouldn't do any good.
    Also do the rims you use allow for a FWH in the centre of it?
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  5. 20th September 2010, 08:57 AM #5
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    Quote Originally Posted by Utemad View Post
    Does the P38 have a lockable transfedr case such as the Disco1 or a viscous one like some RRC?

    If it doesn't lock then FWH wouldn't do any good.
    Also do the rims you use allow for a FWH in the centre of it?
    Viscous coupling.

    I'm doubtful that those are for a P38A. If they were, they'd cover 1995 onward. Note also they say for 10 spline and 23 spline axles.

    Also, those part nos, in the MileMarker catalogue refer to:

    　
    BRITISH LEYLAND
    Land Rover (6 bolt 10-spline axle)
    420
    Land Rover (6 bolt 24-spline axle)
    432
    Series I, II, III, All W.B.
    432
    Ron B.
    VK2OTC

    2003 L322 Range Rover Vogue 4.4 V8 Auto
    2007 Yamaha XJR1300
    Previous: 1983, 1986 RRC; 1995, 1996 P38A; 1995 Disco1; 1984 V8 County 110; Series IIA



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  6. 22nd September 2010, 12:25 AM #6
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    Quote Originally Posted by BigJon View Post
    Why on earth would you fit free wheeling hubs to a constant 4wd vehicle (of any sort)?

    Completely pointless waste of time and money.
    Probably not so simple on P38 (if even available), but I have a conversion like the one described in mind for mrs 100 series cruiser. SA business sells one. Benefits are: Improved fuel economy (15%) and substantially reduced wear and tear on (front end) drive train components... oh yeah, and as Paul alluded... hanging the rear out on demand and roostering others when playing in mud!
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  7. 22nd September 2010, 11:29 AM #7
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    Reduced wear on front axle components, increased wear in transfer case .

    Reduced fuel consumption (15%), decreased road holding / stability (30%?) .

    Hanging the back end out while playing in the mud - Priceless .
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  8. 22nd September 2010, 02:47 PM #8
    WasabiPimpNinja Guest
    I read somewhere that reason they went for constant 4WD was that with the weight of the range rover and the power of the motor, the rear diff couldn't handle it on it's own and would give up the ghost rather quickly. All hearsay mind you

    Cheers,
    Keels.
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