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Old 11-30-2017, 03:35 PM   #1
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Trans cooler

I have a 2006 Gulf Stream Endura. 8.1chevy with an Allison trans. Has anyone put a trans cooler on the Allison. Also my trans line run between the oil pan and the exhaust. Not a good spot. At least to me. Thanks

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Old 11-30-2017, 04:09 PM   #2
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There should be oil cooler line ports on the bottom of the torque converter housing - along with a control main filter. This is for the allison 1000/2000/2500 series. Did your class C not come with the cooler already plumbed and installed? I find that odd considering the weight that it would always be pulling. Sometimes it is integrated into the radiator. If not, then just plumb one in - if its an allison 1000 - then any of the chevy duramax kits should work with little modification.

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Old 12-12-2017, 04:15 PM   #3
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Yep. I had the Chevy factory add-on OPTION installed by an Allison transmission shop (along with a fluid/spin-on filter change).

We had 2 times it seemed to smell overly hot, so we got a code reader to monitor the tranny temp. After monitoring and finding it running 230-245 nearly 100% of the time (a few times on 6% we were pushing 255-260), we opted to have more cooling capacity installed with the FACTORY version of the cooler.

I would highly recommend getting a cooler installed - either factory add-on version or a high volume 25-50k BTU aftermarket version. Don't skimp on the size to cool the tranny down. The factory version (around a 25k cooler) comes with the piping needed since the pipes would need to be extended, so it's pricier, but worth the extra bit of money as labor to bend new pipes is also expensive.

You'll find your temps running in the 190-210 range consistently even climbing 5-7% grades after you put a tranny cooler in. If you get a code reader to monitor your tranny temps, in cold (<40 degree) you may need to stop to warm up the tranny as running too cold is hard on them too.
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