I'm getting ready to change the trans fluid in my 4-speed
transmission, on a 97 Grand Caravan. BTW - I'm on my 4th trans...
Anyway, the owners manual says to use ATF +2, the last time I
changed it I used +3 (per the dealer where I bought the filter), and
now I'm hearing I should use ATF +4... I still have a coupld of quarts
of +3 left - can I mix +3 and +4? What should I be using?
Also, if I drop the pan, then also flush the converter, roughly how
much fluid do I need total?
ATF +4 is backward compatible with ATF+3,ATF+2 and ATF+. Those fluids were
the recommended fluids to use but now ATF+4 has taken its place.
ATF+4 has better antiwear properties, improved rust/corrosion prevention,
controls oxidation,eliminates deposits, controls friction, retains anti
foaming properties and superior properties for low temp operation. You can
mix it but why not use the best available out there?
"Coasty" <uscg_ret at comcast dot net> wrote in message
This was about 3 years ago. There was none available at any of the auto
stores I went to and called, and to this day, it is still not available, at
least around here... Last trip I took to Minnesota, I bought about 9-quarts
from Wal-Mart, which were on clearance. I can attest to the fact that
locally, nobody but the dealership sells it... If I had a choice, I would
rather NOT buy at the dealership, as the local dealership (the ONLY one in
the area,) inflates prices beyond even what a normal dealership charges....
The only reason I would mix them is that I have 5 qts of +3 left and
hate to waste it... And I can't find any more +3 around here. ATF +4
is going for just over $4/qt for brand X, more like $6/qt for
Valvoline. Just don't have a lot of spare change...
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