Transmission filter and fluid

Asked by Days01 Sep 20, 2020 at 05:23 AM about the 1991 Chevrolet S-10 Extended Cab RWD

Question type: Maintenance & Repair

I have a 1991 Chevy S10  automatic 4.3L. I want to change
the filter, my owner's manual says to use Dextron II but
does not tell me how much I need. I just bought it and has
200,000 miles. Hitter much fluid do I need and should I use
some if the old fluid with lucas transmission fix or just new
fluid?

2 Answers
40,200

TDolby answered 3 years ago

You'll want to buy Dex/Merc fluid. For a dump and fill it's around 5 qts, pick up a couple extra just in case you need more. You will add once the pan is back on and check the level via the dipstick to get to the proper level.

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james answered 3 years ago

Unless the transmission fluid is burnt, it's leaking, or you know the vehicle has had regular transmission fluid changes, I'd leave it alone. A lot of times changing the transmission fluid on an older model can cause problems. The dirt and junk in there actually helps keep it going. I definitely wouldn't put an additive in there either. Hope that helps! Jim

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