I have an Omega 2.5TD with the AR25 autobox. Now I know that this gearbox can be something of a weak point in the vehicle. I'm not 100% convinced that the one in mine is in perfect health....
It might be my imagination, as I haven't owned an automatic car for a few years now, but I think the gearbox is just a little too slippy at times. It's also slow to engage reverse, probably 1-2 seconds instead of instantly when you put it in Drive. Other than that, it goes through the gears ok, and the torque converter locks at just under 50. It kicks down like it should too. It's just the engine revs sometimes hardly change when it changes gear, especially on light throttle.
The car is on 163k, so not in the first flush of youth by any means. It was originally a HSBC company car up to 100k, and I have their service history print out confirming that the box was replaced at 70k. So the one in it may well have over 90k on it now. The engine is standard, and I have no immediate plans to start messing with the ECU as it seems to pull like a train as it is.
Do you think it is worth me changing the gearbox oil and filters, or leaving it as it is and putting the cash towards upgrading it to an AR35 box (if I can find one)?
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