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 > Allison tranny/eng oil cooler upgrade

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Fastfwd101

Mt Home Idaho Via TEXAS (Air Force)

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Posted: 04/15/12 08:51pm Link  |  Print  |  Notify Moderator

Has anyone upgraded their allison tranny cooler? Looking for adivice on which to use/not use and if it has helped out at all. also on eng oil cooler.

I have an 05 Duramax/Allison. Thanks for any info.


05 2500HD Duramax/Allison
3:73/4X4/CC
08 31Ft Keystone Energy TH
89 17.5 Stratos FS

bob213

Fresno, CA

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Posted: 04/15/12 10:08pm Link  |  Print  |  Notify Moderator

Doubt that you need a different trans cooler. If you are experiencing high trans temps you are probably experiencing an inherent '05 problem. Google "thermal feedback" or look for posts by "Killerbee". A different turbo mouthpiece and induction tubes usually fix the problem for alot cheaper than any other remedy. Try beekiller@cox.net

christopherglenn

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Posted: 04/15/12 10:49pm Link  |  Print  |  Notify Moderator

Google "Mike L. cooler". for a allison cooler,
and "killerbeeperformance" for engine / oil cooling.


2007 Chevrolet 3500 CC/LB Duramax/Dually 4X4 Mine r4tech, Reese Signature Series 18k +slider, duratrac, Titan 62 gallon, diamond eye, Cheetah 64
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RCMAN46

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Posted: 04/15/12 10:55pm Link  |  Print  |  Notify Moderator

The Killerbee fix was not for overheating transmissions. The most common cause of an Allison overheating is overfilling the transmission. Double check your fluid level. Best to run it a little low than over full.

What were your temperatures and under what conditions?

Golden_HVAC

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Posted: 04/16/12 12:48am Link  |  Print  |  Notify Moderator

One thing to check or just replace is the thermostat. They run on a little bit of wax, that as it melts expands, pushing against a spring, to open the water flow. If only a tiny amount of wax escapes, it will stop working right, and the engine will overheat.

Put the thermostat into boiling water, and see how far it opens. Better yet, replace it with a new one, they don't cost more than $20.

I had a friend that has a Mitsubishi, and it constantly overheated. He installed a hydraulic reservoir cooler on his engine, the thing never overheats anymore! I think the cooler has 1" lines and is only about 14" tall and 7" wide, 4" deep. The tubing makes about 6 passes, and comes out at around 120F. This cools the engine by getting rid of about 1/3 of the heat.

Fred.

Fastfwd101

Mt Home Idaho Via TEXAS (Air Force)

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Posted: 04/16/12 05:58am Link  |  Print  |  Notify Moderator

She does not run hot all the time, only when pulling TT in the hills. I'm easy on the pedal and normally
in tow haul mode.

killerbee

PHOENIX USA, Never hot

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Posted: 04/16/12 08:05am Link  |  Print  |  Notify Moderator

In the 05, the transmission temperature is dependent on cooling system effectiveness, because of the liquid/liquid heat exchange between them in the radiator. Any changes that you make to improve cooling system performance, will lower transmission temperatures.

There are other ways to approach it also.


Michael, Systems Engineer and Professional DURAMAX Diesel Tuner
Killerbee Performance


ib516

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Posted: 04/16/12 08:08am Link  |  Print  |  Notify Moderator

Fastfwd101 wrote:

She does not run hot all the time, only when pulling TT in the hills. I'm easy on the pedal and normally
in tow haul mode.

Typical. There are fixes out there.


2010 Cougar 322QBS 5er
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2014 RAM 2500 Crew Cab, 4x4, 6.4L Hemi, 4.10, 66RFE auto
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RCMAN46

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Posted: 04/16/12 09:05am Link  |  Print  |  Notify Moderator

Until we get some temperatures from the OP we do not know what is overheating. An overfilled Allison will overheat without the engine temperature beyond the limits. We need more information from the OP. From what I read I was of the impression his transmission was overheating but then what some consider too high is often well within normal operating temperatures.

bob213

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Posted: 04/16/12 09:51am Link  |  Print  |  Notify Moderator

The Killerbee fix may not have been designed for high trans temps but it does have a direct effect on it. My temps dropped quite abit....

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