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Open Roads Forum  >  Class A Motorhomes  >  All

 > Transynd vs Dexron VI

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Coach Cleats

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Posted: 12/03/18 08:35am Link  |  Quote  |  Print  |  Notify Moderator

Can Dexron VI be used to replace Transynd on my 2004 Allison 3000 transmission for a fluid and filter change?


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wolfe10

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Posted: 12/03/18 08:57am Link  |  Quote  |  Print  |  Notify Moderator

That is a question I would ask Allison. Better than our opinion.

Suspect it can be used, but do not know how it affects recommended change intervals.

I have always just bought a 5 gallon PAIL of Transynd and the Allison filter kit from our local Allison Dealer. The pail leaves you with one quart left over and is less $$ than buying individual gallons/quarts.


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Posted: 12/03/18 10:10am Link  |  Quote  |  Print  |  Notify Moderator

Allison ONLY recommends transmission fluid that is TES-295 approved. Several manufacturers meet this spec. I would not use any fluid that does not say that it meets the Allison TES-295 specifications. The older transmissions did come with a non-295 Fluid, probably Dex III in your case, but why go with any inferior fluid when Allison now recommends a fluid that meets TES-295 in their older transmissions. You do not have to buy Allison fluid if you don't want to give them the money but I would definitely recommend buying the newer spec fluid from someone, anyone, instead of using an older fluid. Saving a few bucks on a transmission that can cost $5000+ to repair just doesn't make sense. BP, Castrol, and others make the TES-295 fluid that you need. Try to find one on sale and use the right, most recent fluid, instead of using a fluid that Allison abandoned many years ago for their transmissions.

RCMAN46

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Posted: 12/03/18 12:11pm Link  |  Quote  |  Print  |  Notify Moderator

I am almost sure your 2004 Allison has seals that are not compatible with Dextron VI but they are compatible with Transynd.

Dextron VI post #63

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Posted: 12/03/18 12:36pm Link  |  Quote  |  Print  |  Notify Moderator

What makes you think your transynd is bad ? I’d have it tested and change the filters .. in mh use I doubt it will wear out. Your call but it’s expensive and if it test ok I would use it , some won’t and are only time centered
I was told they are comparable but must be changed if used frequently.


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Posted: 12/03/18 12:38pm Link  |  Quote  |  Print  |  Notify Moderator

Stick with what Allison recommends, the transynd. When I bought my LBZ first thing I did was change to transynd. They recommend to change ever 100k so it’s not much as far as cost goes.


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Posted: 12/03/18 12:40pm Link  |  Quote  |  Print  |  Notify Moderator

RCMAN46 wrote:

I am almost sure your 2004 Allison has seals that are not compatible with Dextron VI but they are compatible with Transynd.

Dextron VI post #63


I may be wrong as I did not notice it was an Allison 3000 but what I have indicated is true for a 2004 Allison 1000.

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Posted: 12/03/18 02:32pm Link  |  Quote  |  Print  |  Notify Moderator

If the question is "should I change the fluid":

How many years old/how many miles on it?

Charlie D.

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Posted: 12/03/18 06:07pm Link  |  Quote  |  Print  |  Notify Moderator

Quote:

Allison ONLY recommends transmission fluid that is TES-295 approved.

The Diesel Supplement manual for the 2018 D/A recommends Dexron VI above temps of -40 F. Below that it specifies TES 295. That holds true for 2013 and up model years


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Posted: 12/03/18 06:18pm Link  |  Quote  |  Print  |  Notify Moderator

Charlie D. wrote:

Quote:

Allison ONLY recommends transmission fluid that is TES-295 approved.

The Diesel Supplement manual for the 2018 D/A recommends Dexron VI above temps of -40 F. Below that it specifies TES 295. That holds true for 2013 and up model years


So basically anyone that has an Allison transmission anywhere other than the frozen arctic should not use Transynd TES-295 rated fluid, since most of the lower 48 has temps above -40 F. Only use TES-295 for temps less than -40 F. I think you need to reread your source. [emoticon]

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