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Thread: Extra gearbox oil cooler for towing Y or N ?

  1. #31
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    Quote Originally Posted by gavinwibrow View Post
    Prefer an additional cooling resource rather than dropping gears for 3-400 km.
    Agree, and there is no benefit in the transmission in a lower gear as far as cooling.

  2. #32
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    Quote Originally Posted by Tombie View Post
    The transmission has a warming strategy built in to reach operating temp.

    Adding this will just complicate and potentially introduce future issues.

    Point taken!
    MY16 D4 TDV6 - with a little Cambo magic for towing "The Brick"
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    SADLY SOLD MY04 D2a TD5 auto Classic and MY10 D4 2.7 both with lots of goodies

  3. #33
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    Quote Originally Posted by Lukeis View Post
    how much did you pay?

    ive been through the costs of a new gearbox and from my basic understanding of the ZF is that overheating is a leading cause of their degradation.

    there’s no down side that I’m aware of to fitting one, so for the low costs why not? Sub $500 I believe?
    Cooler did not arrive in time for the service today so will go on in a month or so once school holidays are over.
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  4. #34
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    Quote Originally Posted by Tombie View Post
    The transmission has a warming strategy built in to reach operating temp.

    Adding this will just complicate and potentially introduce future issues.
    that first line makes sense,,,

    is it a thermostat?

    cannot see how more fluid,, and more cooling, can be a bad thing, when the vehicle is driven hard,,

    All trans fail when overheated. No trans fail when over cooled..
    yes there is a greater risk,, more hoses=more connections, but thats about the only downside..
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  5. #35
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    Quote Originally Posted by Pedro_The_Swift View Post
    All trans fail when overheated. No trans fail when over cooled..
    Maybe not fail, but it's certainly documented that wear is increased if overcooled and constantly operating below desired operating temperature range - which in the long run can/will lead to premature failure. Not as quickly as overheated but it would be naive to assume that it's as simple as maximum cooling is the best.
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  6. #36
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    Extra gearbox oil cooler for towing Y or N ?

    Quote Originally Posted by Pedro_The_Swift View Post
    that first line makes sense,,,

    is it a thermostat?

    cannot see how more fluid,, and more cooling, can be a bad thing, when the vehicle is driven hard,,

    All trans fail when overheated. No trans fail when over cooled..
    yes there is a greater risk,, more hoses=more connections, but thats about the only downside..
    No it’s not. It uses a flow strategy to warm to operating temp quickly. Combination of gear selection, converter slip etc.

    Plenty of downside adding an additional thermostat - they are a known failure point.

    Running cold does do damage (wear increases) and older transmissions couldn’t manage this.
    These 6HP and 8HP units can, and do, manage their warm up to reduce wear.

  7. #37
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    Quote Originally Posted by Tombie View Post
    No it’s not. It uses a flow strategy to warm to operating temp quickly. Combination of gear selection, converter slip etc.

    Plenty of downside adding an additional thermostat - they are a known failure point.

    Running cold does do damage (wear increases) and older transmissions couldn’t manage this.
    These 6HP and 8HP units can, and do, manage their warm up to reduce wear.

    I'm not talking about over-cooling, and already aware, having read and posted the Ashcroft info.
    My thermostat wont start opening until 80 - near the start of the recommended operating range, and if I can reduce the current 110+ towing operating temp down to the recommended range of 77 - 93, I'll be a happy vegemite.

    EDIT - Plus whenever towing, I have my GAP tool working, so can monitor carefully.
    MY16 D4 TDV6 - with a little Cambo magic for towing "The Brick"
    MY95 RRC LSE Vogue Softdash "Bessie" (turning circle comparable to QE II) with MY99 TD5 and 4HP24 transplants. Back home Nov 22 after a magic overhaul by Chivalry
    SADLY SOLD MY04 D2a TD5 auto Classic and MY10 D4 2.7 both with lots of goodies

  8. #38
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    30c today, van on the back, cruise on, 116km/h SOG.
    Strong head wind and not a care in the world Extra gearbox oil cooler for towing Y or N ?

    Love these D4s.

  9. #39
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    Quote Originally Posted by Tombie View Post
    30c today, van on the back, cruise on, 116km/h SOG.
    Strong head wind and not a care in the world Extra gearbox oil cooler for towing Y or N ?

    Love these D4s.

    This SOG? I have one!
    SOG Toilet Ventilation System
    MY16 D4 TDV6 - with a little Cambo magic for towing "The Brick"
    MY95 RRC LSE Vogue Softdash "Bessie" (turning circle comparable to QE II) with MY99 TD5 and 4HP24 transplants. Back home Nov 22 after a magic overhaul by Chivalry
    SADLY SOLD MY04 D2a TD5 auto Classic and MY10 D4 2.7 both with lots of goodies

  10. #40
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    Quote Originally Posted by gavinwibrow View Post
    This SOG? I have one!
    SOG Toilet Ventilation System
    Hahahahaha

    I always write as SOG to give real speed not “Instrument”.

    They are a good system for the other use!

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