DB9 Transmission Cooler Replacement
Discussion
Was wondering if anyone had any experience of changing the transmission cooler on a DB9.(2005)
Mine was leaking (pipes were ok)- looks like previously already done.
Have fitted the new cooler but had a question about filling the transmission. Not a lot came out of he cooler. I plugged lines so didn’t loose much there.
Have seen the filling procedure for the gearbox but wondered if I needed to run it up to 75c or so to ensure that the gearbox thermostat opens and the cooler and lines fill up?
If so is it safe for me to just start car and get gearbox up to this temp to fill the lines or should I go through the check / fill procedure first. My thought was that the cooler would not fill at the 40c or so that one fills the gearbox.? If I could run it firstly to 75c or so it would save me one check / fill process.
Could Bamford Mike or others possibly comment?
Thanks
Mine was leaking (pipes were ok)- looks like previously already done.
Have fitted the new cooler but had a question about filling the transmission. Not a lot came out of he cooler. I plugged lines so didn’t loose much there.
Have seen the filling procedure for the gearbox but wondered if I needed to run it up to 75c or so to ensure that the gearbox thermostat opens and the cooler and lines fill up?
If so is it safe for me to just start car and get gearbox up to this temp to fill the lines or should I go through the check / fill procedure first. My thought was that the cooler would not fill at the 40c or so that one fills the gearbox.? If I could run it firstly to 75c or so it would save me one check / fill process.
Could Bamford Mike or others possibly comment?
Thanks
Hi.
Yes, the system will need running up to temp to correctly check the oil level, a cooler and pipe work can hold up to a litre so you’ll deffo need to top up, and you’ve said the system has been leaking.
From cold and on a ramp, turn dsc off and cycle through to 6th, at a reasonable steady state speed it’ll take about 15 mins to get up to temp (a blow torch on the stat housing can speed the process up a bit).
Come off throttle, put in D and whilst taking care not to become entangled in the wheels, check the level at the gearbox (you’ll need to take the heat shield off first)
You said you already had a leak, and you’ve put new parts on, so I can’t imagine anything less than 1 litre is required to return to correct level. The quick way would be to jack car up on one side to enable a litre to go in the box, then run the level check when buzzed up to temperature.
Yes, the system will need running up to temp to correctly check the oil level, a cooler and pipe work can hold up to a litre so you’ll deffo need to top up, and you’ve said the system has been leaking.
From cold and on a ramp, turn dsc off and cycle through to 6th, at a reasonable steady state speed it’ll take about 15 mins to get up to temp (a blow torch on the stat housing can speed the process up a bit).
Come off throttle, put in D and whilst taking care not to become entangled in the wheels, check the level at the gearbox (you’ll need to take the heat shield off first)
You said you already had a leak, and you’ve put new parts on, so I can’t imagine anything less than 1 litre is required to return to correct level. The quick way would be to jack car up on one side to enable a litre to go in the box, then run the level check when buzzed up to temperature.
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