Trans fluid on cats

[Rick]

you seem to be the only person on the internet saying it will catch on fire.

Transmission and Power Steering fluids both are more easily ignitable than engine oil. I have seen the damage from the fires they've caused.
I just found this comparison on Youtube...



One more...



Not a fuel fire, an automatic transmission explosion and fire...

 

[donalds]

you seem to be the only person on the internet saying it will catch on fire.

 

[CDW6212R]

you seem to be the only person on the internet saying it will catch on fire.

Oh yes it is flammable. It may be very rare to see a fire from fluids like ATF or brake fluid etc, but don't count on luck to keep you from experiencing it. Be careful with those fluids in high heat conditions like on the exhaust. Try hard to keep it off of the exhaust, but wipe it off quickly if it happens, and brake cleaner is great to use if everything is cool, and it can displace the fluid and dry off fast.