"any brand of dextron III will work"
This is wrong. Use only the approved Hyundai ATF, SP-III. If that is absolutely not available in cases such as myself (in Alaska with no Hyundai dealer within 700 miles), ATF+4 should be fine (exceeds specs). Dextron III does not meet the specifications of the Hyundai ATF, and Hyundai transmissions are very picky.
I agree with the above. Dextron by itself is not enough. A chart I have recomends factory fluid,but if not available,Mopar makes an additive that should be added with Dextron.
Genuine Diamond automatic transmission fluid SP-11M
Automatic: 6.9 quarts Manual: 2.3 quarts
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Dexron III automatic transmission fluid
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Automatic - Hyundai SP3/SP4 Manual - SAE 75W/90
Automatic:Genuine Diamond automatic transmission fluid SP-11M Manual:SAE 75W/90 gear oil
Automatic: 6.9 quarts Manual: 2.3 quarts
Torque specifications for automatic transaxle: fluid pan bolts 84-96 in-lbs ( 9.4-10.8 Nm )
SpIII
8.2 quarts