Extra gearbox oil cooler for towing Y or N ?

Quote:

---

Originally Posted by gavinwibrow

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.

Quote:

---

Originally Posted by Tombie

The transmission has a warming strategy built in to reach operating temp.

Adding this will just complicate and potentially introduce future issues.

---

Point taken!

Quote:

---

Originally Posted by Lukeis

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.

Quote:

---

Originally Posted by Tombie

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? [wink11][tonguewink]

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.. [smilebigeye]
yes there is a greater risk,, more hoses=more connections, but thats about the only downside.. [bigsmile1]

Quote:

---

Originally Posted by Pedro_The_Swift

All trans fail when overheated. No trans fail when over cooled.. [smilebigeye]

---

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.

Quote:

---

Originally Posted by Pedro_The_Swift

that first line makes sense,,,

is it a thermostat? [wink11][tonguewink]

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.. [smilebigeye]
yes there is a greater risk,, more hoses=more connections, but thats about the only downside.. [bigsmile1]

---

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.

Quote:

---

Originally Posted by Tombie

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.

30c today, van on the back, cruise on, 116km/h SOG.
Strong head wind and not a care in the world [emoji41]

Love these D4s.

Quote:

---

Originally Posted by Tombie

30c today, van on the back, cruise on, 116km/h SOG.
Strong head wind and not a care in the world [emoji41]

Love these D4s.

---

This SOG? I have one!
SOG Toilet Ventilation System

Quote:

---

Originally Posted by gavinwibrow

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!