Originally Posted By: joel95ex
I dunno about toyota, but honda/acura does NOT recommend full exchanges or flushes.. the TSB actually recommends drain, refill with shifting and bringing rpm's high enough for 2nd gear, drain and refill again.... For a clean-up or refresh i would drain with the plug and refill a few times with lower mileage intervals... your drain plug might be magnetic and you can clean it....mine is and always has "powder"on it... i would also stick with the original fluid. I have followed this plan and have over 320K miles on the original automatic trans on my accord.
It would be nice for someone to get to the bottom of why Honda does not recommend a flush when Ford does.
Multiple drain and refills of the pan use a LOT more ATF to get to 95% new ATF than a flush. Thats not cost effective and not green.
Now if the objective was to just refresh the ATF in the pan, then a single drain and refill would be reasonable.
Honda also recommends their Z1 ATF, which by all accounts is not all that good an ATF.