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My stock trans lived for a long time at 535whp back in the day. I also ran 2 coolers and kept an eye on temps.

Steve

What is the best trans cooler to run? I am running the Derale single electric fan? Are there dual fan coolers? Or is the Derale good enough?
I am running a built auto.
 

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What is the best trans cooler to run? I am running the Derale single electric fan? Are there dual fan coolers? Or is the Derale good enough?
I am running a built auto.
I have a bl built auto with a b&m cooler and a fan on a 175 thermostat. The cooler dissipates plenty of heat in the passenger fender where the ic used to be. I'm running a 3800 pi stall. I'll probably get a lot of hate for this but I think a lot of people really go overboard with the cooling on the auto. If your cooler dissipates enough heat to keep up on a 170 or 180 thermostat, you are fine. If you road race this may be a different story but in 100 degree weather with ac blasting and city or highway driving, mine was fine. Fan was always able to cycle. I was running 15 psi on gas and stock long block. More power and you may need more cooling as well. Again, if you can cycle your fan on a 170 or 180 you are cooling well.
 

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What is the best trans cooler to run? I am running the Derale single electric fan? Are there dual fan coolers? Or is the Derale good enough?
I am running a built auto.
I'm going to be doing a triple cooler set up. two B&M coolers with fans on each brake duct, then a Mocal 40row on the radiator. overkill but a cooler trans is a happy trans.
 

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called toyota to get some T4 ATF for the supra and they kept telling me to get the dexron III fluid instead. wtf
T-IV started to be shipped in vehicles in late-late 90s early 00s. WS started around ~04.
Up until ~2010 Toyota would put on the transmission dipstick what kind of fluid to add. Usually the white sticker
ALL OEM tranny pan drain bolts will show DIII or TIV on it. Crawl under and look.

Hope this helps.

*edit* DO NOT mix any of the three types.
 

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since this is the auto trans thread, how many of you would think the car would benefit from running well made all aluminum radiator with internal auto cooler in line with a filter an other external filters? or would you rather not have it connected to the rad at all.
 

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Installed my auto trans temp on filter housing. Current routing transmission, external filter, trans cooler, back to trans. First time seeing auto trans data and surprised it takes 5+ minutes to crack 120'F and was in the 130-140 until parking/traffic speed where it went to 150s. Any issues with the slow warm up?
 

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I've got a ATF Stage 3 built auto and was wondering if I can keep my OD on on the highway when doing a WOT pull or even at the dragstrip(which I haven't done yet).
 

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No not recommended ...
 

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Perfect sounds good. I usually take it off O/D before I do a pull on the highway.
Don't do it "usually", do it always. Just letting it downshift into 3rd by pressing the throttle still keeps the O/D band applied, according to ATF. They say to unlock O/D before doing a pull.

Al
 

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Don't do it "usually", do it always. Just letting it downshift into 3rd by pressing the throttle still keeps the O/D band applied, according to ATF. They say to unlock O/D before doing a pull.

Al
Sorry, I worded it wrong I do always take it off O/D before a pull
 

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Back with another question. So did a pull and maxed out at 133mph at 7200 rpm in 3rd gear on the highway in mexico. So I'm wondering is it safe to go into 4th(O/D) when trying to chase more speed once I'm at the top of 3rd? If so how? If not...what could I do to reach a higher top speed like what gearing would be appropriate? 3.27 gears? But also don't want to limit myself too much on acceleration as well. This car is an ATF built Stage 3 transmission as well if that makes a difference. Trying to learn as much as I can from you all with experience with this transmission.

Thanks.
 
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Back with another question. So did a pull and maxed out at 133mph at 7200 rpm in 3rd gear on the highway in mexico. So I'm wondering is it safe to go into 4th(O/D) when trying to chase more speed once I'm at the top of 3rd? If so how? If not...what could I do to reach a higher top speed like what gearing would be appropriate? 3.27 gears? But also don't want to limit myself too much on acceleration as well. This car is an ATF built Stage 3 transmission as well if that makes a difference. Trying to learn as much as I can from you all with experience with this transmission.

Thanks.
More RPM or a taller Tire will
Help increase MPH. You can also get a taller rear end gearing. That’s what I did I have a 3.13 rear end wjrh an auto trans. I think I’m good for 200mph.
 

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Get a 28" tire, though the top end won't be as stable if you lower the tire pressures down. The best thing is to increase the rev limiter, if you can. If you're stock ECU, find a used G-Force ECU.

I wouldn't change the gearing - it will make the car a dog around town unless you're in boost. It will also mess with your shifting ie: the converter will unlock on the hwy at almost any throttle input. Even the tall tires will do that a little.

Al
 

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E
More RPM or a taller Tire will
Help increase MPH. You can also get a taller rear end gearing. That’s what I did I have a 3.13 rear end wjrh an auto trans. I think I’m good for 200mph.

Ended up buying 3.26 gearing from a JDM RZ 6 speed car...small diff not the big diff. Hoping that should help! I would like to keep a streetable look though I have 18 inch CCW wheels so I will probably get a bigger tire to increase it to 28".
 

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Okay, so since the beginning, everyone has preached about using genuine Toyota T-IV trans fluid. But ATF recommends using Valvoline Dexron 6 fully synthetic fluid. Anyone running that fluid with good results? Notice any difference in performance from the T-IV? It's supposed to be thinner than the earlier Dexrons, presumably since it's synthetic.

I guess I will be making the switch since that is what they recommend, and they built the trans. Apparently, they use the Dexron 6 in all of their models of transmissions, and use the same clutches in all of them.

Damn, I got like 10 qts of the old T-IV, lol!

Al
 

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I’ve always used Toyota’s T-IV in my ATF. Never had a problem with slipping making 900+ hp on a 4K stall for 3+ years. Use to own a boost logic ran T-IV in that for over 10 years making 500+ with no issues. Keep the fluid temps down and your golden. I’m not changing anything just because ATF uses something different. Toyota makes good shit.
 

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That was my feeling last time I saw their Dexron 6 recommendation in the instructions, and I stuck with T-IV. But I burned up the clutches in the trans in a fairly short amount of time, so I decided to go with their recommendation after they rebuilt it. They said T-IV is technically okay, but that they recommended the Dex 6.

There has got to be a reason everyone else is having good luck with the ATF, and I am not. I had longevity with my old Level 10 trans, so I know how to make them live.

I'd bet the guy that ran 7.99 is running the Dex 6.

Al
 

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Follow Baltic Supra on you tube he runs high 7’s all day long. He is sponsored by ATF so he probably runs what ATF recommends.
 
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