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 Post subject: Do I need an external tranny cooler?
PostPosted: Thu Jun 15, 2017 8:21 pm 
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I am merely driving my van
I am merely driving my van

Joined: Tue May 16, 2017 3:54 am
Posts: 6
I have a 2004 Chev Astro Van. Will be hauling a 3000# tent trailer plus gear and kayaks up the Coquihalla. The tranny does have cooling through the radiator, but do I need an external tranny cooler as well? Appreciate any comments.

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 Post subject: Re: Do I need an external tranny cooler?
PostPosted: Fri Jun 16, 2017 2:09 am 
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I get chills without my van.
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Joined: Sun Aug 11, 2013 2:42 am
Posts: 87
Location: Ft. Lauderdale, Florida
Do you "NEED" an external tranny cooler, pulling a fairly heavy load, up highway mountain roads? Need? I guess that really depends on how long you want your transmission to last!

Winter driving most likely wouldn't be an issue.. but do you plan to drive in the summer too?

The "built-in" cooler in the radiator is probably barely adequate under "normal" conditions, which really doesn't include towing. Mountain roads, even without towing an extra load, can still cause damaging conditions.

Heat destroys transmissions! Under these extra demanding conditions without a trans cooler, the heat can spike up quite quickly. If temps exceed safe limits, the life of your trans may be shortened, but by how much.. who knows?

There is no exact answer, but YES a trans cooler can greatly add to the life of your trans under severe use. They are fairly inexpensive, easy enough to install, and well worth the cost and effort.

Most trucks set up by the factory for towing will come with them.

It's like asking if you "need" to change your oil regularly... only if you want longer life out of your engine. Same applies to the transmission!

Good luck!

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92 Chevy Astro Shorty | V8-350
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 Post subject: Re: Do I need an external tranny cooler?
PostPosted: Fri Jun 16, 2017 4:01 pm 
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I am merely driving my van
I am merely driving my van

Joined: Tue May 16, 2017 3:54 am
Posts: 6
Thanks for your input! I came to the conclusion that I do need the external cooler...it just made sense.....even though a local mechanic said "nahhh, you won't need it....." I guess a gal should just trust her first instincts, eh?

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