Honda's official word on "flushing"

motsco_ wrote:
> Earle Horton wrote:
>> "motsco_" > wrote in message
>> ...
>>> Earle Horton wrote:
>>>>> And they didn't even mention the most important / expensive reasons:
>> The
>>>>> goofs at your local Monkey Lube will hook up the hoses backwards and
>>>>> flush the contents of the internal transmission filter throughout your
>>>>> tranny, then refill it with Dexron or something else that will further
>>>>> help to destroy your new tranny :-(
>>>>>
>>>>> 'Curly'
>>>> The owner's manual for our CR-V says to change the transmission fluid
>> three
>>>> times, driving between each time. That's a lot of transmission fluid,
>>>> especially if you have to pay "Honda Genuine" prices for it. I don't
>> know,
>>>> we bought the vehicle used at 100,000 miles, and it seems to have been
>> well
>>>> maintained, but the tranny fluid looked black in the drain pan although
>> it
>>>> looked good on the dipstick.
>>>>
>>>> Earle
>>> ---------------------------------
>>>
>>> I always ask people to wipe the dipstick on a piece of white paper to
>>> determine the color better. I've owned four used CR-V's and I did the
>>> triple drain-n-fill on all of them. I think it's cheap insurance in case
>>> the last owner may have neglected the tranny.
>>>
>>> What's the cost of a few bottles of Z1 compared to replacing a
>>> reamed-out tranny?
>>>
>>> P.S. Did you replace the Dual Pump Fluid in the rear differential too?
>>> 30,000 miles is the correct interval... At least you only need one
>>> litre. :-)
>>>
>> Yeah. Clean as a whistle, but why not believe the owner's manual when
>> you
>> have spent a ridiculous amount of money for a used vehicle, just
>> because it
>> is a Honda? That rear diff. looks expensive. That tranny does too.
>> Cheap
>> sources for Z1, or thoughts on using Dexron for the first two changes?
>>
>> Cheers,
>>
>> Earle
>
> ----------------------------------
>
> I run Z1 in my rear differentials. I'm totally convinced it's the same
> stuff. In some countries you can't get DPF, so the dealers just sell Z1
> and everything works OK. I have the choice of three dealers but Z1 still
> expensive.
>
> For the tranny, Dexron for the first drain-n-fill would be OK, I'm
> thinking,

in my experience, /any/ ordinary dexron in the transmission messes up
the shift quality big time. avoid, avoid, avoid.

> but Z1 for the next two, for sure. I drain it very patiently.
> I think Z1 just has a few essential additives, but is probably just
> Dexron otherwise.
>
> 'Curly'

motsco_ wrote:
> fvckH1B wrote:
>>> For the tranny, Dexron for the first drain-n-fill would be OK, I'm
>>> thinking, but Z1 for the next two, for sure. I drain it very
>>> patiently. I think Z1 just has a few essential additives, but is
>>> probably just Dexron otherwise.
>>
>> How long to drive between the drain-n-fills ?
>
> ------------------------------------
>
> The shop manual says you can just run it through the gears for a few
> minutes, sitting still. If you drive it until next weekend you get more
> magnetic particles (fuzz) on the recently cleaned magnet due to more
> exposure. I like to get as much out as I can, partly as a diagnostic.
>
> 'Curly'

i recently changed the fluid on my 89 after about 50k of hard charging.
the magnet was so clean, you could still see bare metal. indicates
that lots of the metal fragmentation occurs in the early miles.