Mixing ATF+4 with regular ATF?
#1563226
01/14/14 06:14 PM
01/14/14 06:14 PM
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Joined: Sep 2007
Posts: 1,893
Spahn Ranch
RMCHRGR
OP
top fuel
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OP
top fuel
Joined: Sep 2007
Posts: 1,893
Spahn Ranch
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I know this gets beaten to death and there are many varying opinions on ATF+4 but I'm gonna ask anyway because after all I've read through, I don't have a clear answer. Maybe there ins't one?
I've read so many different things about using ATF+4 in older TFs that it can get confusing - shifts are not as hard, formulated for newer lockup transmissions, may cause leaks due to different additives/detergents forming acids, the world will end yada yada.
My trans is a 904/999, Turbo Action forward manual valve body, (No LBA), 5 disc drum, low gear set etc. Nothing fancy. I changed the pan this winter and used a new silicone gasket. I did not drain the converter. Unit looked clean, fluid was clean. Previous owner said he ran Dexron in it. It shifts pretty hard but relatively smoothly at WOT. It's good.
Here's the thing - I have a case of ATF+4 on my shelf. What happens if I add the ATF+4 to my trans? Will I blow it up or will I not notice anything? Will it cause leaks?
Please advise.
- Greg
'71 Duster
'72 Challenger
'17 Ram 1500
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Re: Mixing ATF+4 with regular ATF?
[Re: Thumperdart]
#1563228
01/14/14 08:17 PM
01/14/14 08:17 PM
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Joined: Jan 2003
Posts: 4,616
Kissimmee Fl.
dusturbd340W5
master
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master
Joined: Jan 2003
Posts: 4,616
Kissimmee Fl.
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It will not hurt anything, can change shift feel because of the different friction modifiers that are it the +4.
Will not cause any leaks the 904/999 uses the same rubber and seals as the 500od unit.
That being said I personally wouldn't use it in a race application.
70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake
best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4
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Re: Mixing ATF+4 with regular ATF?
[Re: RMCHRGR]
#1563230
01/15/14 12:15 AM
01/15/14 12:15 AM
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Joined: Dec 2003
Posts: 22,696
Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,696
Bitopia
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Quote:
I know this gets beaten to death and there are many varying opinions on ATF+4 but I'm gonna ask anyway because after all I've read through, I don't have a clear answer. Maybe there ins't one?
I've read so many different things about using ATF+4 in older TFs that it can get confusing - shifts are not as hard, formulated for newer lockup transmissions, may cause leaks due to different additives/detergents forming acids, the world will end yada yada.
My trans is a 904/999, Turbo Action forward manual valve body, (No LBA), 5 disc drum, low gear set etc. Nothing fancy. I changed the pan this winter and used a new silicone gasket. I did not drain the converter. Unit looked clean, fluid was clean. Previous owner said he ran Dexron in it. It shifts pretty hard but relatively smoothly at WOT. It's good.
Here's the thing - I have a case of ATF+4 on my shelf. What happens if I add the ATF+4 to my trans? Will I blow it up or will I not notice anything? Will it cause leaks?
Please advise.
- Greg
I haven't a clue, but I like your style. 
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Mixing ATF+4 with regular ATF?
[Re: 383man]
#1563232
01/15/14 11:55 AM
01/15/14 11:55 AM
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Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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I agree, it won't be a problem. Heck I use Hyundai SPF III in mine because I have so much of it. 
"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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Re: Mixing ATF+4 with regular ATF?
[Re: Guitar Jones]
#1563233
01/15/14 05:08 PM
01/15/14 05:08 PM
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Joined: Sep 2007
Posts: 1,893
Spahn Ranch
RMCHRGR
OP
top fuel
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OP
top fuel
Joined: Sep 2007
Posts: 1,893
Spahn Ranch
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Cool, thanks guys. Seems like it won't be an issue. Just wanted to be sure before I dump it in. Again, I didn't remove the unit to drain the converter.
yeah, I was a Chrysler and Hyundai tech myself, that's why I have the +4. I've used Hyundai fluid in other vehicles too.
'71 Duster
'72 Challenger
'17 Ram 1500
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The trans in my sons Dart has only had the ATF+3 and 4 as its been in his Dart since 1996 and it never been out just serviced a few times in the car which was filter and fluid changes. Ron