Hayden 678 Transmission Cooler

[TonyB66]

It seems that the most popular choices for addtional transmission cooling are various offering from B&M and Tru-Cool. These tend to be around 70-90 dollars. I've had a few of these in my Amazon Wishlist for almost a year...

The Hayden 678, at about half the price, and rated at 24,000 GVWR, 5,000 lbs towing, looks very appealing.

https://www.amazon.com/Hayden-Automotive-678-Rapid-Cool-Transmission/dp/B000C3DDKO

What am I missing? It's only .75" thick too. It not a low pressure drop unit, or at least it's not advertised as such...

Summit has it for less than 40 bucks. Tempting.

https://www.summitracing.com/parts/hda-678

If you have this transmission cooler, please share your experiences or impressions. I'm thinking of running it in series. I replaced the radiator about a 1,000 miles ago...

Thanks.

 

[jgue467]

Got one, number one rule, don't run it alone, even in SF cool weather.

They're all going to work, in colder weather some folks like the models with a cold weather valve.

They're effective but learning to use OD-OFF is even more effective on hills, mountain passes. Luck and enjoy the Runner. :cowboy:

 

[JVC8790]

Realistically, you can never have too much cooling for trans fluid, the major killer of trans fluid is heat. Less heat, longer life.

I have yet to pick up my T4R but I am in the middle of a trans cooler on my other project (1998 Volvo S70 T5) and have been doing a lot of research on trans coolers over the past few months.

A lot of the difference in coolers comes down to the type of cooler (tube and fin, stacked plate etc)

I ended up going with a Derale cooler with AN fittings and would have gone even bigger if I had the space. I fully intend to install a trans cooler on the 4Runner I'm picking up (04 V8) and from the research I've done, the best cooler is the biggest one you can fit and there isn't a major reason not to run it in series with the existing one because that just adds further cooling capabilities.

 

[turbodudey2]

I'm running a Hayden cooler too. But it's the larger version: Hayden 679.

I bypassed the radiator. The normal operating temp for the ATF in my truck is around 150 degrees. When the ambient air temperature gets up to 115 - 120 degrees here in the summer, the ATF runs closer to 175 degrees.

At these temperatures the radiator would only ever be adding heat to the transmission, so even when I installed a new radiator a few years ago I kept it bypassed.

 

[4Runner4Leon]

I initially bought the 678, then returned it and exchanged for the B&M 70264. I forgot why I returned it though . The Hayden is a lot larger in area than the B&M (11 x 9.5 vs. 11 x 5.75), so maybe that was the reason. I spent a lot of time messing around and mocking up the fit of the the different coolers, make sure you do that too before committing.

I think in the end, I really liked how the 70264 fit in my truck, how the hoses lined up, etc. Also, I really like the low pressure bypass, I think it's a good thing to have for cooler climates. The few bucks you save now will be forgotten soon enough, so focus on the longterm benefits instead!

 

[TonyB66]

Thanks everyone for the thoughtful replies. I can appreciate such considerations as fitment and how things line-up, like hoses, etc.

I'm still leaning towards an in series install, but at times I do think of the bypass route...

 

[4Runner4Leon]

Thanks everyone for the thoughtful replies. I can appreciate such considerations as fitment and how things line-up, like hoses, etc.

I'm still leaning towards an in series install, but at times I do think of the bypass route...

I'd definitely recommend the series install, especially given the new radiator you have!

 

[TonyB66]

I'd definitely recommend the series install, especially given the new radiator you have!

Thanks Leon. Did the 1.5" thickness of the B&M 70264 make for any fitment issues? I imagine not. I see others at .75". I'll scope out the space tomorrow...

In addition to more weight on my 4Runner, I'll be pulling a trailer. After reading a few threads on transmission coolers, I'm inclined to get the highest rated unit (BTU or GVWR). Looking at the B&M 70266...

 

[19963.4lsr5]

Thanks Leon. Did the 1.5" thickness of the B&M 70264 make for any fitment issues? I imagine not. I see others at .75". I'll scope out the space tomorrow...



In addition to more weight on my 4Runner, I'll be pulling a trailer. After reading a few threads on transmission coolers, I'm inclined to get the highest rated unit (BTU or GVWR). Looking at the B&M 70266...

The TrueCool required changing how the horn was mounted.


Sent from my iPhone using Tapatalk

 

[4Runner4Leon]

Thanks Leon. Did the 1.5" thickness of the B&M 70264 make for any fitment issues? I imagine not. I see others at .75". I'll scope out the space tomorrow...

I did relocate one of the horns to make use of that mounting hole for a bracket. But otherwise it fit in very nicely.

Now, ask me how much fun I had trying to wedge in the Landcruiser cooler that I originally got, that was not happening (on the left):

 

[TonyB66]

Thank you both. Not sure if "Like" is working these days, but suffice it to say, I've been clickin' on it...

Not so worried about a horn as that will come-out when I do the Cadillac horns (A,C, D & F).

The photo helps.

The 70264 is:

11" x 5-3/4" x 1-1/2"

The 7266 is:

11" x 8" x 1-1/2"

The inlet and outlet, both on the 11" side, would seemingly make for no differences in the two with respect to hose routing. I believe it was Leon who said earlier that he found the 70264 desirable in that regard...

At a little over 2" wider, it will be a tighter fit in that space. Two dimensionally, the 7266 is about the size of a sheet of paper. I'll take a look later today...

 

[turbodudey2]

Just for reference the thinner 3/4" Hayden cooler does fit nicely behind the front support member.

Dimensions for the Hayden 679: 11" x 11.625" x 0.75"

Using the included zip ties make it easy to snug right up against the condenser core for better air flow too.

This picture shows the in/out ports oriented down, but the final resting place was turned 90 degrees with ports on the passenger side like normal.

 

[TonyB66]

Just as I was about to pop the hood to scope-out the area for a transmission cooler, the mail truck arrives. One item was a prospectus for a recent stock/ETF purchase, and it contained cardboard-like like piece, these dimensions.

Very close in size to the B&M 70266... After some quick positioning I determined that it should fit on the passenger side.

Flowmaster has a discount code that lowered the price to 99 bucks (free shipping), so I just ordered it. No plumbing included though...

Just wanted to get closure on this thread.

 

[BamaDrewski]

I am running the 678 and have been for 11 years with ZERO issues. I bypassed the radiator and even though we do get some colder temps in the Alabama winters, it has never caused an issue.

I am on the original tranny (A340F) and never want to risk the pink milkshake and this is why I bypassed the radiator. The cooler (678) is more than sufficient to cool the tranny fluid.

When I check the transmission fluid (running Mobil1 Syntethic Transmission fluid) it looks absolutely new. I also run the inline Magnafine filter. With almost 310K miles on the original transmission, the transmission runs great....no slipping or clunking. Shift points are fine, smooth shifting. I would recommend the Hayden 678. It has been a winner on my rig.

 

[TonyB66]

I am running the 678 and have been for 11 years with ZERO issues. I bypassed the radiator and even though we do get some colder temps in the Alabama winters, it has never caused an issue.

I am on the original tranny (A340F) and never want to risk the pink milkshake and this is why I bypassed the radiator. The cooler (678) is more than sufficient to cool the tranny fluid.

When I check the transmission fluid (running Mobil1 Syntethic Transmission fluid) it looks absolutely new. I also run the inline Magnafine filter. With almost 310K miles on the original transmission, the transmission runs great....no slipping or clunking. Shift points are fine, smooth shifting. I would recommend the Hayden 678. It has been a winner on my rig.

Good to hear BD. I communicated with someone here who bypassed with the B&M 70266, and it worked like a champ.

I am seriously considering a bypass with the B&M 70266; and would monitor temps very closely with the SGII. If I happen to experience a scenario where temps are seemingly too high, I'll change-up the connection to involve the radiator (factory transmission fluid cooler).

Where did you place the Magnafine filter?

 

[Astro]

Hey guys thank you so much for the info. I have a v6 2009 4runner. I can’t figure out which B&M cooler would fit for my vehicle. Having said that, I think (and I could be wrong) that it really doesn’t matter which B&M to add? Or are they very vehicle specific?

Any chance I can get a way with the BM 70266? Assuming the fit ent isn’t an issue?

Thanks all

 

[TonyB66]

Hey guys thank you so much for the info. I have a v6 2009 4runner. I can’t figure out which B&M cooler would fit for my vehicle. Having said that, I think (and I could be wrong) that it really doesn’t matter which B&M to add? Or are they very vehicle specific?

Any chance I can get a way with the BM 70266? Assuming the fit ent isn’t an issue?

Thanks all

As I recall, that's the one I installed. If so, zero fitment issues for me...

 

[Bad Luck]

Hey guys thank you so much for the info. I have a v6 2009 4runner. I can’t figure out which B&M cooler would fit for my vehicle. Having said that, I think (and I could be wrong) that it really doesn’t matter which B&M to add? Or are they very vehicle specific?

Any chance I can get a way with the BM 70266? Assuming the fit ent isn’t an issue?

Thanks all

You have a 4th Gen 4Runner. This is the 3rd Gen section so most of us here can't tell you for certain what will and won't fit on your vehicle.

Here's a 4th gen specific google search you can try: https://www.google.com/search?q=site%3Atoyota-4Runner.org%2F4th-gen-t4rs%2F+transmission+cooler&newwindow=1&rlz=1C1QJDB_enUS784US793&sxsrf=ALeKk01Gh0NKdYbjF4orfasl0EsP3SJxEw%3A1629741789595&ei=3eIjYezdI4SPtAbmsp_QDA&oq=site%3Atoyota-4Runner.org%2F4th-gen-t4rs%2F+transmission+cooler&gs_lcp=Cgdnd3Mtd2l6EAM6BwgAEEcQsANKBAhBGABQ0BlYxh9gjiJoAXACeACAAUuIAfwDkgEBOJgBAKABAcgBCMABAQ&sclient=gws-wiz&ved=0ahUKEwiswMaj3cfyAhWEB80KHWbZB8oQ4dUDCA4&uact=5