Inexpensive MPG boost... - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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Old 04-14-2008, 07:26 AM
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Inexpensive MPG boost...

Prior to having the truck diagnosed with blown head gaskets, I thought I had tranny problems, not recognizing the 'limp mode' when towing. I took the truck to a friends shop and had the tranny serviced. He related there was two filters, one in the pan, the other a small element similiar to an small oil filter in size. He changed filters/fluid, the small filter was clogged (65,000 miles) and he stated it was limiting the oil supply.
Driving the truck away the shifts were crisper, my mpg prior to the service was an accepted/live with it 14-15 highway. I watched as my mpgs (dash readout) climbed to 17-18 highway use. Since then I have watched as combination driving has yielded about 1-2+ mpg increase over the before service mpg. I had always focused on engine/fuel mods as mpg improvement areas-
I am now considering changing out that 'lil' filter every other oill change.
Tranny knowledgable tech input would be appreciated.
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Old 04-14-2008, 07:35 AM
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What year and trans is it. And where is this second filter located?
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Old 04-14-2008, 07:40 AM
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I believe the filter is in a canister near the front of the bottom of the tranny on my 07.
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Old 04-14-2008, 09:33 AM
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yup, under the RF. Cartridge type. I have to see what the book recomends for a change interval.
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Old 04-14-2008, 11:37 AM
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Worth looking into. Thanks for the heads up. For what it's worth, a decent rule of thumb is that the driveline "wastes" 20% of the engine power through friction, so yeah, it's quite easy to improve MPG (return it to stock really) through such mods
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Old 04-14-2008, 11:43 AM
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The external tranny filter should be changed every 15k miles...
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Old 04-14-2008, 11:45 AM
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It is a quick change also, does not require new fluid or anything!
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Old 04-14-2008, 12:06 PM
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anyone got a number or picture of where this is. cause in 230,000 miles i have never changed this. might be a reason my ranny is getting so hot lately.
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Old 04-14-2008, 12:40 PM
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Quote:
Originally Posted by cowboyupamrka View Post
anyone got a number or picture of where this is. cause in 230,000 miles i have never changed this. might be a reason my ranny is getting so hot lately.
This is for the 5R110 Torqshift. The 4R100 doesn't have one unless you had one installed.
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Old 04-14-2008, 01:06 PM
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that makes sense. guess i should look at the thread a little harder next time. haha. my bad.
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