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-   -   Do I need a gearbox oil cooler? (https://www.the75andztclub.co.uk/forum/showthread.php?t=279729)

rustymotor 24th February 2018 07:06

Quote:

Originally Posted by SD1too (Post 2599209)
Jim,

If your radiator electric cooling fan is working on all speeds you should have nothing to worry about. Its speed will increase if the ECU detects that additional cooling is required (source: RAVE).

Simon

That's a good point I knew the Volvo's worked like that from what Ive read it was wired in to the factory fitted tow bar system..

Correction: Think on the Volvo with factory fitted tow bar and when a load is hitched up, there is a signal to the ECU to set off in lower gear range.

Davy 24th February 2018 07:29

I`ve towed several vans over the last 10 years with a diesel auto 75 tourer with some very near max weight and never had a problem.As said above just make sure the autobox oil is changed at regular intervals.

Davy

alanaslan 26th December 2018 23:17

Quote:

Originally Posted by rustymotor (Post 2599035)
I wouldn't be happy running an auto thousands of miles in sports mode, it really indicates the tow car is under powered for all road conditions, I would think it could be used to maintain higher revs for uphill stretches however, if it works for you so be it.

What would be interesting is to rig up a temp sensor on the auto box or the cooler and see what it's doing while towing. You could then determine if the standard cooler is doing a job or not. :}



The use of sports mode is to keep the engine on cam and in turbo range. As on the normal box setting she is sitting at around 1500 rpm which puts her off cam and out of turbo range. She will happily pull in normal drive mode known as economy mode but you are aware of the van behind you. Add to that an extra 15 seconds to the 0 to 60 time. Much prefer sports mode if only to get power down on small roads 0 to 60 time only pulled back by 3 seconds. On the motorway or autoroute. Once the car and can are at 60 mph normal drive mode is selected to keep the box in fifth and avoid her changing up and down all the time.
I have driven wagons all my life though not as my job. I agree that it can be very frustrating if you get behind a crawling caravan. But there is no need for it as with a properly matched unit, pulling the van should not change the speed that you drive at the van will happily follow the car at 60 mph and that is the legal limit.
Bad or poorly educated drivers is what gives caravaners a bad reputation.


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trikey 28th December 2018 21:26

As Davy said, do a full change of the transmission fluid and all will be well, I used to tow a 1600kg van with my auto and it never missed a beat.


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