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Old 08-15-2010, 07:33 PM   #1
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Installing an automatic transmission cooler

Does any one have an install guide online with directions or sample photos on installing a B&M 70268 after market automatic transmission fluid cooler. I have. 2010 Jeep Wrangler unlimited mountain.

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Old 08-15-2010, 07:47 PM   #2
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Originally Posted by Robd225 View Post
Does any one have an install guide online with directions or sample photos on installing a B&M 70268 after market automatic transmission fluid cooler. I have. 2010 Jeep Wrangler unlimited mountain.
Transmission Cooler

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Old 08-15-2010, 08:44 PM   #3
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Good pictorial install writeup, but

My feelings are !!

1)-bottom aux cooler line should go to the Bottom tranny line (hot oil)-

2) the top aux cool line should go to the top tranny line (return cooled oil line)-

Why, because the (HOT OIL), bottom line, should be PUSHED (tranny oil pump)up thru the aux cooler, so it stays in the cooler LONGER for cooling, rather than gravity, pulling it down, quickly !!

I say this because I've by passed the A/C cooler alltogether !

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Old 08-16-2010, 03:07 AM   #4
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Newb Question:

How desperate is the need for a tranny cooler? I understand the more offroading the more necessary but how bad does it get without one?
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Old 08-16-2010, 05:58 AM   #5
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I ran about 3.5 miles of deep sand on the beach and over heated my tranny fluid and had to stop band wait for my jeep to cool down.
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Old 08-16-2010, 06:45 AM   #6
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Quote:
Originally Posted by Steel02001
Newb Question:

How desperate is the need for a tranny cooler? I understand the more offroading the more necessary but how bad does it get without one?
I've over heated mine twice now, both times off-road, once stuck in mud rocking it it, the other on a high RPM, steep, muddy hill climb. both times I put it in No Gear and shut her off as soon as I heard it for about 1/2 hour. according to my readout, I've gotten it up to 220...the thing that sucks is my auto's normal operating temp is 200. that's on the street, no heavy traffic. she runs hot even when not being pushed.

I'll be getting a cooler soon. I recommend all automatic JK owners install an aux transmission cooler, similar to the one Jimbo has described.
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Old 08-16-2010, 08:26 AM   #7
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FYI, the jeep auto overheats any time you load the tranny for an extended period of time ie: Long hills in high gear--idle in traffic, in HEAT--pulling trailer in HEAT-pulling trailer, up hills--pulling trailers in 4hi--playing in sand in 4hi

The Chrysler recalls (J30) have been because of jeep auto "fires", the flash point of ATF-4 is 374° and it surges out of the dipstick tube-hits the passenger side exhaust header and--BAM--fire

If you;re still under warranty--good luck

If the excessive heat "EATS" your tranny (no fire) and you're under warranty, then Chrysler will replace your tranny FREE and install and aux cooler--KEWL

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Old 08-16-2010, 09:39 AM   #8
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Here is a question...
Being a Jeep newbie (as far as DIY) and living in a desert, what is a decent cooler I could look into? Something rather easy to install would be nice too.
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Old 08-16-2010, 09:47 AM   #9
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B&M makes a relatively decent one and mine is JCWhitney (B&M), but the easiest route is to--

Google "jeep aux cooler" and you will get 100's of articles about recommendatios and I think most are a B&M ser # (?), somebody might post that one

Mine is an aux cooler for an 18,000' GVW vehicle, which is a little bigger than needed--MAYBE, mine works fine and any of them are simple to install, mine took longer, because I installed two transmitters for temp indication !!

Good luck

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Old 08-16-2010, 09:58 AM   #10
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Old 08-16-2010, 10:04 AM   #11
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Yea, I think thats the one that most are using !!


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Good luck !

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