Originally posted by Contouraholic:
The only way around this might be an external pump, tap into the tranny pan, let the external pump pull oil out of the pan, filter it, and return it to the pan. This would work, but I don't know if it would be really cost effective. I would just change the tranny oil more frequently and put an appropriate sized oil cooler on.
This isn't a bad idea, except the CD4E doesn't have a bottom pan.
The flow rate of the CD4E through the cooling line is approx 1L every 20 seconds at idle.
I don't know what it is while driving, but it HAS to be tested while driving.
Placing a pump on the line between the cooler and a filter wouldn't be a bad idea.
When the fluid re-enters the tranny, it is directed to spray on the drive chain,
so there is no problem with pressure on the return side.
From there it drains to the bottom and is picked up buy the sump.
The problem, with adding a pump is this...
Cooler flow rate is variable, and if the pump flow exceeded the actual flow at idle,
it could very well PULL oil pressure away from the tranny, via the cooler line outlet,
and that would be bad for the tranny.
If the pump should fail while you were driving, the fluid flow throught the cooler would essentially STOP.
This would back up inside the tranny, and cause a spike in pressure that *could* crack the ATX Case.
So you see, the IDEA has potential, but the pumps we have today, are not really suited for this type of application.
