Trans fluid & filter - Page 2 - Chevy and GMC Duramax Diesel Forum
Maintenance Discuss scheduled maintenace, capacities, filter part numbers, etc.

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Old 11-08-2012, 01:50 PM   eBay Motors  #11 (permalink)
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Originally Posted by elkhornsun View Post
The ONLY time Allision recommends changing the internal filter is during an overhaul of the transmission.
That is correct however that being said Allison doesn't do ANY warranty work on these transmissions in the gm pick up truck platform GM does it all. I have talked to Allison professionals that told me they would never go more than 100k miles without changing the internal filter based on what they have seen first hand. With an internal filter costing 26.95 its kind of cheap insurance and to schedule the filter change with a fluid change is a prudent thing to do in my opinion but that is just me and the anal side of me wanting to protect my 50k dollar truck for as long as possible. As I always say to people do your research settle on what you are comfortable with and stick to it!
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Old 11-13-2012, 04:19 PM   eBay Motors  #12 (permalink)
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What have these people seen first hand and do they know if it is not the result of the owners using performance tuning chips that upped the horsepower output from the engines?

A lot of the blown Allisons with the earlier trucks is from people boosting the HP by 150 and the stock transmissions were not built to take it.
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Old 11-13-2012, 07:05 PM   eBay Motors  #13 (permalink)
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Stay with a 100hp stock trans safe EFI live tune not a junk PPE or Bully dog and you'll be fine. Don't use the 100hp and beat on it daily or stay WOT from 4-5 and it'll be fine. What's worse for it is switching tunes over and over and not letting the trans learn before dogging on it.


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Old 11-14-2012, 11:00 AM   eBay Motors  #14 (permalink)
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Quote:
Originally Posted by elkhornsun View Post
What have these people seen first hand and do they know if it is not the result of the owners using performance tuning chips that upped the horsepower output from the engines?

A lot of the blown Allisons with the earlier trucks is from people boosting the HP by 150 and the stock transmissions were not built to take it.
They do not equate it to running power or not they equate it to build up internally from old fluid or lack of spin-on changes or both. I would say if you want a definitive answer ask Mike L what he would do in his personal truck and that should tell you what you should do.
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Old 11-19-2012, 08:57 AM   eBay Motors  #15 (permalink)
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Just bought 2007 not sure what's in the tranny can I drain pan change filter an put possibly a better fluid in it and what's the best to use
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Old 11-19-2012, 09:09 AM   eBay Motors  #16 (permalink)
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Just bought 2007 not sure what's in the tranny can I drain pan change filter an put possibly a better fluid in it and what's the best to use
Stop posting in every thread and making threads no one can understand. Transynd is the best fluid. You can find that out by using google search.
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