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Old 03-13-2007, 05:22 PM   #1
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Has anyone actually used Mobile 1 in their Workhorse Allison? I am strongly considering doing so.
Mine is a 1000. The Allison info I have states ATF suitable for C-4 is acceptable. Mobile 1's info states it meets Allison C-4.I know Mobile 1 is not on Allisons list of accepted ATFs but from what I see there is no reason not to use it. I am out of warrenty so that is no problem. Any help?
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Old 03-13-2007, 05:22 PM   #2
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Has anyone actually used Mobile 1 in their Workhorse Allison? I am strongly considering doing so.
Mine is a 1000. The Allison info I have states ATF suitable for C-4 is acceptable. Mobile 1's info states it meets Allison C-4.I know Mobile 1 is not on Allisons list of accepted ATFs but from what I see there is no reason not to use it. I am out of warrenty so that is no problem. Any help?
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Old 03-13-2007, 05:39 PM   #3
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The Exxon/Mobil Synthetic Fluid is a TES-295 qualified fluid. I'm not at all certain about Mobil 1 however. I would call Mobil just to make sure.

You can check the Allison site for more info about synthetics.

AN-051005 ExxonMobil Lubricants and Petroleum Specialties Company Mobil Delvac Synthetic ATF

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Old 03-13-2007, 08:09 PM   #4
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I changed my 2001 Allison 1000 with 30,000 miles to Mobil1 about 2000 miles ago. No problems to report.
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Old 03-14-2007, 04:55 AM   #5
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Here is the Allison publication for the 1000 transmission http://www.allisontransmission.com/servlet/DownloadFile...leToGet=MT4007EN.pdf. It states that Dexron III or TES 295 fluids can be used. It also states that only Transnd or TES 295 should be used which seems to be somewhat in conflict. I use Transnd in my 1000. It costs $30 per gallon and Mobil 1 ATF would probably cost nearly as much. Why in the world experiment, unless Allison tells you Mobil 1 is just as good as Transnd?
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Old 03-14-2007, 04:31 PM   #6
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I switched Mobile 1 in my Workhorse/Allison at about 8,000 miles. Have about 30,000 on it now. Have used it for years and have no concerns. Its good stuff.
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Old 03-15-2007, 05:52 AM   #7
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I emailed mobile and the TES 295 mobile only comes in 55 gallon drums. I guess that a agreement with gm TES 295 thing. I run moble syn from wallmart in my allison. Mobile would not confirm that it was TES 295 compliant Transend from my local workhorse service center is almost $50.00 gallon
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Old 03-16-2007, 08:52 AM   #8
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Ron55,

Call around to some of your local truck supply houses. I got five gallons of TranSynd for 162.00 bucks, or they also had it in one gallon pails for about 30.00.

Also look up lubricants in your yellow pages. I called a Castrol distributor, and although he couldn't sell TranSynd, he did sell BP Autran, which is the SAME product with a different name. Same price about 160 for five gallons.
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Old 03-29-2007, 08:17 AM   #9
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http://www.allisontransmission.com/servlet/DownloadFile...leToGet=OM3364EN.pdf

Sorry it's not clickable, just FYI the updated Allison info Jan. 2007 is TES 389.
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Old 03-29-2007, 08:19 AM   #10
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Well I guess it was clickable, anyway it's page 57.
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Old 03-29-2007, 05:42 PM   #11
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I posted info earlier on the new Transmission fluid, Dextron VI is not compatible with the seals and O rings in older Allison transmissions that were built before a changeover date. (Any that specify Dextron III) See pg 57 in "Rolling on"'s link... The TES 389 replaces Dextron III..because of the incompatibility. Good discussion here
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Old 04-03-2007, 03:26 PM   #12
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I have about 20,000 miles on my allision 1000 since I switched to mobil 1 have not experienced any problems I feel it will match up to any oils for auto transmissions
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Old 01-27-2008, 04:42 PM   #13
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Why deviate from Castrol TranSynd???

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Old 01-27-2008, 07:25 PM   #14
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Tom N:
Why deviate from Castrol Transynd??? </div></BLOCKQUOTE>The fluid may often be difficult to obtain however a run through the Internet Yellow Pages can usually find an Allison dealership close-by.
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