4r70w Transmission Flush
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When you change out your transmission fluid to a synthetic, or if the fluid is badly burned, this is the method for flushing out the converter and oil cooler. Measure the amount and put the same amount of new fluid back into the transmission. should be about 4 to 5 quarts. disconnect the upper tube going into the transmission heat exchanger. on the 4r70w, fluid comes from the transmission into the upper connection on the heat exchanger.
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These are the tools and parts needed to complete the job:transmission fluid (note this unit took 5qts to refill) up to 2008 amzn.to 2dhdchs2009 and ne. Not sure if this is useful for any members here, but i recently did a "cooler line flush" on the 4r70w in my f150 and documented it with pics. i was not able to find anything like this when i did the procedure myself. Reply. 1968 present e series van cutaway chassis '03 4r70w e250 trans flush most of us here have heard or read of this process, how its so highly recommended but relatively seldom done especially at the diy level. i'll be the living proof it is 100% an easy diy single person project if one is inclined. The ford maintenance schedule for 2000 called for transmission service at 30k miles. the truck was still under warranty at this time and the master ford mechanic drained the t c and pan then refilled the transmission splashing fluid on the t c vanes. i have repeated the service six more times, transmission has 232k miles now and no problems.
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