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L322 Won't change into 4th Gear : Expert help!

Discussion in 'Range Rover' started by pmthompson, Feb 26, 2017.

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  1. pmthompson

    pmthompson Member

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    Hi all,

    I've noticed recently there is a strange burning smell when I get out of the car more recently another electrical smell. I didn't think too much of it but today after a fair amount of slow driving the car wouldn't change into 4th. No dash messages/error codes. I tried to change manually but no joy, i had to get home with a limp.

    I've read people talking about the Rad/oil cooler needing to be replaced. I need to take it into the garage but what's the best thing to say to them. They won't be able to experience the problem first hand as it seems to take the Transmission getting hot for it to kick in.

    Any good plans of attack?
     
  2. Saint.V8

    Saint.V8 Dyed-in-the-wool 100% RR Junkie

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    Certainly sounds like it has gone into its overheat program.....

    The gearbox will hold the lower gears and prevent selection of the higher gears, even in manual mode, this is to force as much fluid through the cooler as possible in an effort to lower the fluid temperature.

    It can be caused by poor flow through the rad due to silting up, this can then block the oil cooler too. Similarly, depending on the age of your box and fluid, debris can build up internal to the cooler and block it preventing cooling.

    First thing would be to remove the cooler and flush it through to ensure it is A) Clean and B) clear of bloackages. Then do a gearbox fluid change, as when it goes into its overheat operation, it is pretty much certain the fluid has been cooked....when fluid gets hot it is next to useless as a hyudraulic fluid and loses all its properties that protect the box.

    Ensure you change the filter when you do the fluid and only use a genuine filter (Filtran).

    If yours is a diesel GM box or a Petrol ZF box you didn't say, but the GM box on the early L322's are prone to going bang and a fluid overheat is not going to do the box any favours!

    Next would be to check the cooling system radiator for full and free flow, and no blockages. Then flush the cooling system through and refill.

    So, if you are getting a garage to do it, get them to do a fluid and filter change, ask them for a sample of the old fluid and check it for metallic debris, as this could be a sign of a rebuild is due (common on the early L322 boxes I am afraid).

    Fingers crossed yours isn't too bad, and could just do with a fluid, filter and cooler flush out....

    How long did you drive it in this mode?
     
  3. pmthompson

    pmthompson Member

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    Thanks for the long, informative response. I've got the BMW V8. I drove it for about 15 miles in that mode. It was also giving off a weird whistling sound too. :( any thoughts on that?
     
  4. Saint.V8

    Saint.V8 Dyed-in-the-wool 100% RR Junkie

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    15 miles is not overly excessive....

    Was the whistling noise dependant on road speed or engine speed?
     
  5. pmthompson

    pmthompson Member

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    It was weird, first it was a whistle, then a whine noise. In my head I thought Vanos... but who knows.

    I've just taken it in to the garage, going to get them to give it a look over. Told them to do the Trans fluid and filter as par of course and investigate the oil cooler and Rad.
     
  6. Saint.V8

    Saint.V8 Dyed-in-the-wool 100% RR Junkie

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    Could be the gearbox oil pump cavetating, or the PAS pump cavetating....

    Check the PAS fluid level, and top up as necessary....

    Also, if it was the GB pump due to low fluid level, see if it continues once they have done the fluid and filter change.
     
  7. Dippypud

    Dippypud Never Knowingly Understood

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    Is it reluctant to change from any other gear ?

    When was the fluid last changed ?

    Does it change into fourth at any rev at all ?
     
  8. wil2813

    wil2813 Well-Known Member

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    gb cooler & pipes are first call imo. they block/clog up as ant said
     
  9. pmthompson

    pmthompson Member

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    So I took it in and the guy reckons the gearbox has gone... Im not sure if he totally knows what he's talking about. But suffice to say, if it had, any recommendations for people who can pull out and fit a recon one?

    Also, another new problem has come up, its hard to start when warm. You hear it try and ignite and eventually it does. Is this a separate issue or related??

    At this point, is it worth doing? Spending 2K. I only got the thing for 4.5K... What would you do? How much could I get for it with a Gammy Transmission.
    Cheers guys.
     
  10. The Mad Hat Man

    The Mad Hat Man Well-Known Member LZIR Despatch Agent

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    contact @jamesmartin - he is well recommended for gearbox rebuilds.
     
    Last edited: Mar 1, 2017
  11. pmthompson

    pmthompson Member

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    Did you get the right James Martin? That link shows a user who has not posted
     
  12. The Mad Hat Man

    The Mad Hat Man Well-Known Member LZIR Despatch Agent

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    you mean there are 2? :eek:


    have now ;)
     
  13. pmthompson

    pmthompson Member

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  14. The Mad Hat Man

    The Mad Hat Man Well-Known Member LZIR Despatch Agent

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  15. pmthompson

    pmthompson Member

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  16. The Mad Hat Man

    The Mad Hat Man Well-Known Member LZIR Despatch Agent

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  17. Saint.V8

    Saint.V8 Dyed-in-the-wool 100% RR Junkie

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    Sayers near Heathrow have a pretty good reputation (no affiliation).

    I would get a second opinion, yours would appear to have gone into its Overheat Program I would say (as I said above) first thing would be to drain the fluid, fit a new filter, flush or fit a new oil cooler, refill to the right level and see where your at.

    Do some research on her eand also on the wider WWW for a member called Bemble (on here) or RRPhil (as he is known on other forums).....he is a L322 ZF box genius and rebuilds them.
     
  18. The Mad Hat Man

    The Mad Hat Man Well-Known Member LZIR Despatch Agent

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