Well, how'd it work out?

@bry2k The cooler worked out fine for Rey. I'm running the exact same setup in my 3rd Gen 4runner, and my trans temps are good. You still have to use the tricks of the trade to keep temps down, though, like using 4lo on steep trails or shifting down on long sustained grades. Rey sold his FJ a while back, so I can't give any future updates, but my auto trans is doing great being bypassed and running the Hayden 699 cooler.

Thanks for the comment Mark and I appreciate the compliment. Good luck with your tranny cooler install.

Yeah, running an external cooler in-series with the stock cooler is definitely an option. The cooler we installed in this video has a pressure bypass which bypasses most of the cooling fins in the cooler until the fluid warms up and thins out. From experience, I'm not convinced the stock cooler does a whole lot to increase the operating temp of the fluid. It's when a load is put on the trans that raises the temp significantly. I have a 2000 3rd Gen 4runner with an external cooler in-series with the stock cooler and it can take quite a while for the trans temp to rise. I use that 4runner for commuting and leave pretty early for work when it's colder out and it's mostly freeway driving. The trans temp stays pretty low, low 100's for quite some time even though the engine has been at operating temp, 190 degrees. So yeah, I think it helps to raise the trans temp quicker, but from my experience, it doesn't seem to have as much of an effect as you think it would.

​@@TimmyTheToolmanWell said

Well, it's a beneficial for both us and for the DIY community we serve. Yep, Rey gets work done on his rig but we get a video to share with the world. We've done the same for lots of total strangers. It's actually better when you can help a friend out in the process of creating a video. This however wasn't a repair but rather a mod to help his trans temps. I'm guessing you're referring to the transmission swap we did for Rey. Rey appreciates it and we appreciate him trusting us with his rig.

I can attest, total stranger #342 here!

@@p_rocdap1453 Well, you're not a stranger anymore are you?

Thanks Anwar. You should read some of the negativity I've gotten on the various Facebook pages. The A750F trans was used in a lot of different models so I posted it on a ton of pages. Tons of people chiming in saying you don't need to change the fluid. Flushes are bad. You don't need to change it as often as you suggest, blah, blah, blah. I've done quite a bit of battling with people today defending my methodology. Pretty entertaining. I talked lots of shit and made lots of friends (actually enemies).

@@TimmyTheToolman people are very uneducated and ignorant when it comes to transmission maintenance… It’s so bad that even a well made educational video like this will not even change their mind one bit. I’ll be laughing when they spend several thousand dollars on transmission related repairs in the near future.

@@anwaral-janabi1309 Yep, you would crank up at some of the commentary. They truly don't know what they he'll they are talking sbout.

You are selling yourself short. This is not a hard job, especially since we've laid the job out for you. We've taken the guesswork out for you, so you should have the confidence to do a job like this. So, have confidence in your ability. The more jobs you tackle you thought were above your ability, the better your confidence will get.

Yeah, whatever works.

Hey Timmy, thanks for responding. Really enjoy all your vids. @@TimmyTheToolman

Thanks for the tip on using the bolts to reduce the mess. I use the magnefine magnetic filters on my rigs for the transmission and power steering systems. It would be easy to add a filter into the return line at a later date if Rey decides he wants one.

Thanks. Glad you like it.

Smart man. Did you bypass or run them in-series?

What Timmy said, I've seen both but seems more safety conscious to run separately.

Good job! Your transmission thanks you.

I've always used ATF to lubricate the hoses I was installing but never tried silicone spray. Maybe I'll get a try.

Thanks for the complement!

Thanks Chris, we have a video coming out soon showing how to do a flush on a Lexus GX470 which has the same A750F transmission you have in your FJ. The only difference is your FJ doesn't have a stock external cooler like the GX470 has. In this video, we show you which line is the send line and which is the return line. You would want to remove the rubber return line off the nipple of the trans cooler on the driver side of the radiator and hook up a 3/8" transmission hose long enough to run down to a catch container with graduated quart marks and then start the flush procedure of starting the vehicle, draining out a quart, stopping the vehicle, and then pumping in a new quart of WS ATF into the side of the trans. You keep repeating that procedure until you've exchanged out around 12 quarts. If the fluid still doesn't look really clean at the 12 quart mark, run a 13th quart through and you'll most likely see the fluid looking really clean and brand new coming out of the drain hose. When you watch the video we put out, it will very clear how you do it and then how you go through the fluid check procedure afterwards. If you haven't invested in a scan gauge to monitor your trans temp, I highly recommend you invest in one so you know the temp your trans is running at along with being able to monitor your coolant temp and other things as well like charging volts. It's a smart investment.

Thanks Robert!

You're welcome.

Thanks! We're glad you like it.

I looked back at the Snake Lake video to remember what you wrote. Yeah, your comment wasn't appreciated. You're not perfect and neither are we. Sometimes we say shit we regret afterwards. No biggie. Thanks for the comment. We're glad you like the video and you're very welcome.

@@TimmyTheToolman for sure. I apologize for that.

@@coreyrasmussen6351 Apology accepted.

The choice to bypass is to prevent a trans cooler failure inside the radiator destroying the automatic transmission. Do a search for "Pink Milkshake" for automatic transmission failures and you'll learn what I'm talking about.

I don't know where Rey got that Toyota emblem.

Re-gearing does help a bit but still won’t fix it. The proper solution is the cooler actually.

Not only regear for the tire size, but the additional weight the vehicle is hauling around. Bumpers, winches, rooftop tents, etc are heavy, and add substantial wind resistance. These can make a vehicle work quite a bit harder than it needs to with factory gearing.

Rey's rig has been re-geared to 4.88. You don't have to have bigger tires or a heavily modded rig with lots of extra weight to incur high trans temps. My stock 2000 4runner even with an external trans cooler can hit some really high temps when climbing sustained grades. Re-gearing can help but it's not the only solution.

@@anwaral-janabi1309 You'd be surprised how much head room is in the stock cooler when the converter isn't being overworked. The proper solution is regearing. like stated above even going a little overboard helps even more especially in low range.

Yes the guy is regeared on 4.88 Nitro gears...

We do recommend a cooler and yea there are differences in cooling depending on the size/capacity of the cooler. Typically larger = better/more cooling - Sean

Thank you ok @@TimmyTheToolman

I've never heard that. The pump sucks fluid from the pan through a fine mesh metal filter and through very small channels in the valve body. If it can do that, pushing fluid uphill through a cooler would be very easy for the pump to handle.

@@TimmyTheToolman I thought so too!That was the first I ever heard of that. Thank you so much for taking the time for a detailed response! I really appreciate it. Peace of mind is priceless. Have a great day.

@@Steve_Balboni No problem Steve. We do our best to answer questions in a timely manner. You have a great day as well.

I've never looked at the front end of a 2005 Tacoma to see the space available, but I would guess you could make it work. None of this is plug and play. You have to figure out where you want to mount it and how to make it work with the supplied mounting straps. You bend the straps to the shape you need to in order for it to work. There's always some trial and error involved, but the straps are easy to bend. You might have to drill a hole or holes if where you want to mount it doesn't have existing holes you can use.

I did shoot a video of installing it on my 98 4runner and it would pretty much be the same for your 1st Gen Tacoma. The video I shot wasn't the usual step by step but rather a show and tell how I did it but it will still provide the detail necessary to give people a clear idea how to do it.

Hey, you get our humor. Good job Alfred!

Btw great video!

I suppose you could try to pre-fill it but that wouldn't replace confirming you have the level correct after you're done either with the dipstick if you have an older 4runner or doing the fluid level check procedure if you have a sealed transmission. We're not talking a lot of fluid you have to add. I personally wouldn't bother trying to pre-fill the cooler. Glad you like the video.

I don't think Rey has been pushing his rig in any hot environments yet. I will add a note in the video description or a pinned comment when I get more information from Rey.

I don't think you did any damage. You're good.

@@TimmyTheToolman thanks. That’s what I was thinking. I just hear about air bubbles and it scares me, but I bet either way you route the lines it fills the cooler up. I don’t know, just got me worried.

@@Steve_Balboni You're welcome.

@@TimmyTheToolman do you think plumbing lines where hot goes in top and cool out the bottom definitely forms air bubbles and restricts fluid circulation?

@@Steve_Balboni I'm not sure if air bubbles get trapped in the cooler and limit the cooling capacity. The transmission isn't being starved of fluid. It's just that there's the possibility the cooling capacity of the trans cooler is affected by air bubbles. I've had a trans cooler with the fluid entering the top and exiting the bottom for around 8 years and there's no issues with my transmission.

That cooler ran bypassed should be enough to keep your trans temps down but it you're climbing long steep grades in 108 degree weather, that's a different story. There are times you might find that it's prudent to pull over and give your trans and engine a break. This is why it's imperative to monitor your trans and engine temps to know when it's smart to just pull over and let things cool down. It's best to keep the engine running and even raise the rpms to pull more air with the cooling fan. When the temps drop back to normal, you continue on.

​@@TimmyTheToolman Thank you for your time to answer. I really appreciate you take time to do it!!

@@martinalbertomijares4994 No problem Martin. We try to answer most questions but some squeak by us.

That's not a bad idea.

I'd recommend the same one. The Hayden 699. I just installed one myself on my 98 4runner. You can go smaller if you want and you could choose to run it in-series as well instead of bypassing the stock cooler. The most important thing is to start monitoring your trans temps if you currently aren't and to give your transmission some extra cooling capacity. Heat is the big killer of automatic transmissions.

Timmy what are you seeing in terms of temps now?

@@dverschoor06 I've barely driven my rig since installing the cooler. I did one drive up a sustained 7 mile / 2000 ft elevation gain climb and I hit 206 by the time I reached the top of the climb. I would usually hit around 230+ with my previous set-up running a smaller cooler in-series with the stock cooler in the radiator. But, the ambient temps were pretty cool that day. I might decide to run that Hayden 699 in-series with the stock cooler but I need to test it out for a while before doing that. Rey has told me his temps have been really good since I installed the cooler on his rig but I don't know if he's climbed a grade like I tested mine out on yet. He's driven up in the mountains several times but I don't know if he's climbed anything quite as sustained as I have.

Thanks John! We appreciate your comment.

I have no clue what you mean. Bipolar? Isn't that a term for a psychiatric condition?

How is it better?