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95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

Adding the aftermarket Trans cooler

Old 05-21-2010, 01:32 PM
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Originally Posted by RedToyRunr View Post
... Im guessing that since it has its own cooler that it uses its its own fluid also right?
There is some sharing of fluid but its not like a constant circulation or exchange. Its more like if one side were empty, ATF would slowly flow to the other side (I think). They do have separate drain plugs.

Last edited by mt_goat; 05-21-2010 at 01:34 PM.
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Old 05-21-2010, 01:54 PM
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yeah he can make em in all different sizes and then just use a worm gear to tighten it down. are the tanks on the cooler plastic? if not i can have him put ferrel <sp> type fittings on it like brakes so i can screw em on.
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Old 05-21-2010, 02:11 PM
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Originally Posted by RedToyRunr View Post
.... are the tanks on the cooler plastic? if not i can have him put ferrel <sp> type fittings on it like brakes so i can screw em on.
I think most are all aluminum, barb fittings too, but they don't unscrew.

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Old 05-21-2010, 02:41 PM
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yeah aluminum he cant do but if they were brass he could cut the barb fitting and well another piece on that would have a a male end to screw the hoses to. Ahh well worm gear clamps it is then.
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Old 06-08-2010, 06:46 PM
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Okay, I just got in from finishing my install of the B&M 70624 on my 1999 4runner 2WD. I'd installed the cooler earlier, but hadn't done the hoses because I was going to flush the ATF before connecting.

So today, I started the ATF flush by putting the front wheels up on ramps and pulling the drain bolt on the transmission pan. I got around 3.5 qts out, less than I'd expected, but I didn't drop the pan. I removed the old crush gasket from the drain plug bolt, put on a new one (P/N 35178-30010 ). The old crush gasket slipped off the bolt before I could see the correct orientation; one face has a raised ring on the inner circumference, so I just put that side facing into the pan - hope that was ok.

So I drained the pan, closed the drain, and refilled it. I developed my finesse at pouring ATF by pouring a cup of it on the driveway. Nice.

Next, I tried to pull my return cooler hose off of the metal ATF return pipe. It wouldn't come off, even with slip-joint pliers twisting the hose, so I cut it off at the radiator and stuck it down into a bucket. That's where I learned that I'd gotten the two hoses flipped in my head - my truck helpfully related this to me when my wife cranked 'er up and dirty ATF started hosing out of the radiator to join the clean ATF on my driveway. Nice.

I got my hoses straight (I wasn't surprised that the driveway was covered with ATF - that's usually how oil behaves around me) and began to crank the engine, pump out a qt of old ATF, cut it off, add a qt of Castrol Dextron VI, and repeat. I put a total of 12.5 qts through (including the pan) and by then I was seeing and smelling clean Dextron VI coming out, so I quit the flush before my planned 16 qts.

I cut off the existing ATF hoses with a razor and had a bear of a time installing the new 3/8" Goodyear transmission oil cooler hose (which seems like very nice hose). I ended up heading up the hose ends in boiling water before getting them to go on the metal lines connecting to the transmission. I had to use slip-joint pliers and twist and really crank on the hose to get it all the way onto the metal line. Is that horrible to do? Is there an easier way?

I installed a Magnefine inline ATF filter on the send line before the cooler, and installed the cooler sideways, with the send on the top and return on the bottom. Clamped everything and Bob's your uncle.

It got dark, so tomorrow I'm going to have to double check the fill level on the ATF, I'm a little afraid it's a little high, due to guestimation of spilled amounts. I'm tired of looking at it for tonight. Pics tomorrow if I get to it.

Last edited by pendrag; 06-08-2010 at 09:35 PM.
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Old 06-08-2010, 07:14 PM
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lol, good story! Sounds like when I was changing fluids in my diff's. Those tall skinny gear oil bottles fall over real easy. I think the hose I got from autozone was goodyear also. It was tight but it went on okay by hand. Those metal tubes stop in kind of an awkward place so it makes it tough. I cut the old ones off as well. Can't wait to see pics!
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Old 06-09-2010, 05:39 AM
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If I'm not sure which line is the output I slip a piece of hose on the cooler end and have 2 hoses going into the bucket. Then... after starting, the gushing hose is IDed.

Last edited by mt_goat; 06-09-2010 at 08:07 AM.
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Old 06-09-2010, 08:01 AM
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Originally Posted by mt_goat View Post
If I'm not sure which line is the output I slip a price of hose on the cooler end and have 2 hoses going into the bucket. Then... after starting, the gushing hose is IDed.
My problem was I'd looked it up, then got it mixed up in my mind before I started, so I thought I knew.
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Old 06-09-2010, 03:27 PM
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Here's how I did my coolers:





It's sort of trick getting the bolts through these OEM holes in the lower support, but with a little work, it matches the lower holes on the B&M cooler perfectly.



I had to lop off the lower middle leg of the grille to do it this way, but that's a small price to pay for such a perfect mounting solution. I don't use the stock mounting tabs for the grille anyway (zip ties!). Both coolers (oil and trans) are rock solid, and I was able to bolt the HID ballasts for my fog lights to the top aluminum bracket, too. Beats having them zip tied.

The oil cooler has 1/4" nylon standoff spacers to allow clearance of the A/C hardline. Still as solidly mounted as the trans cooler.
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Old 06-09-2010, 03:37 PM
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Everything's good and nothing's leaking the next day. ATF level checked out ok, so guess I'm done with truck #1. I took the brackets off the other day and painted them semi flat black, so they look much better than in the pics below.


























Last edited by pendrag; 06-09-2010 at 03:38 PM.
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Old 06-29-2010, 10:39 AM
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looks really good pendrag, thanks for the photos.

For my friend's 01 Limited we chose to simply replace the radiator but your install is one of the better ones out there. Nicely done and the photos a huge help to visualize it all out.
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Old 07-03-2010, 11:39 AM
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lol. this post reminds me of my job.
are you a draftsman/drafter? you called out everything in your pics. good job!
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Old 07-19-2011, 10:53 AM
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trans cooler install

I owe all this information on this link to bigfishallday and other notable 4runner.org members. I completed my transmission cooler install earlier this year. Hope it helps even in a small way...

perma-link #39

http://www.toyota-4runner.org/3rd-ge...3rd-gen-3.html
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