Quote:
i use synthetic fluid atf+4.in both my cars.9sec duster and 11 sec street strip duster.i think it depends on how much you race it.i run 2 classes,14-15 runs in a day.later rounds back to back.i foot brake and it seems my launch rpm stays does not vary as much when the trans is hot with synthetic fluid .
i have over $1000 in my transmission $4.00 a quart is not that big of a deal. 
Exactly, $1000 for a torque converter, $700 for a valve body, not to mention good clutches, steels and bands and you're going to cheap out on the fluid? Doesn't make sense.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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