Auto radiators as they age can suffer from internal corrosion which allows coolant to mix with the automatic transmission, you've had a new one, good, so this should not be an issue, because if this does happen it seriously and often permanently damages the transmission.

I am hoping it only needs topping up, but to be on the safe side first i would search online to see what ATF if contaminated by coolant would look like and compare to what you find on the dipstick.

Then for the cost of it i would change the fluid regardless, on Toyotas (most good Japanese cars from this era are made to be serviced properly, as all cars should be but sadly are not) this is usually a simple operation no harder than an engine oil change, you don't say if the fluid was replaced at the time the rad was swapped, and it will only do the gearbox good to have some fresh oil anyway, the sump will probably hold about 3 to 5 litres at a time, this simple method won't flush the torque converter out (rarely are they fitted with their own drain plug) but if you repeated this operation three times over a period of a few days, allowing some running in between and you will have a majority of fresh fluid throughout and disturbed nothing, and priceless peace of mind.

The first sumpful should tell you if coolant has somehow mixed, the old fluid will be dark anyway unless its been changed at some point in the last few years.

Two other points, coolant clear? and not being funny here but you did check the trans oil via the correct method? usually in park with the engine ticking over, on Toyotas of this size there will probably be a cold and warm level marked on the dipstick.

Worth keeping this fine car going, one of the best cars ever made, they really don't make 'em like this any more.

PS, i hope this thread doesn't get ruined by pointless spammers.

Edited by gordonbennet on 26/01/2020 at 07:50

Sounds to me like just needed a top up then JoeB, just keep an eye on it, it might have needed running for a while and rechecking after the radiator change in order to fully fill the oil cooler part of the combined radiator, if it had actually lost a pint or more there would be a wet mess showing or red drips on your parking spot and i don't believe there is any way for atf to enter the engine or air intake.

I wish that model Camry had been available as an estate, one of those would have been with us, but then Toyota arn't the only ones that have missed obvious goals, Hyundai Sonata and Kia Magentis would have made brilliant estate cars, and i do mean squared off real cavernous estates like the previous Camry, not some glorified fast/hatch back, they'd have cleaned up when PSA decided to stop making their previous superb estates when they came out with 407 and C5 mk2, mere shadows of what they replaced.

15 year old Landcruiser and 12 year old Forester here, no intention of replacing either, not as there's much sold new here apart from maybe current Outback that would pique any interest.

Lucky you, still having a gearbox dipstick, even Toyota have disappointingly dropped that on my model LC, checking the oil level is as faff, so much trouble in fact you might as well change the gearbox oil at the same time which is what i did, Subaru at least on our model still have the full three dipsticks under the bonnet, engine, gearbox (both types) and front diff, all car should be like this and would if they were built to last.

Edited by gordonbennet on 26/01/2020 at 13:22