Hi all,I've just joined Good Sam Club. I was the former Transmission Fluids Engineer at Allison Transmission. I held that position from 1990 until my retirement in 2009. Let me know if you have questions about TranSynd, the TES-295 specification or just anything to do with automatic transmission fluids. I'm here to help.

Welcome to the forum. And, thank you for offering your expert advice.I don't have any questions at this time however, I'm sure others will.Thanks again.

You are a welcome sight on here!! Someone who says they know what they are talking about, and actually has the credentials and knowledge to back it up. Glad you joined. Gary

Welcome to the site, and, like gbopp, have no questions, but want to welcome you. Folks like you are what make this site such an incredible resource for help and guidance. Thanks.

Welcome aboard!I have a 2006 GMC Sierra with the Duramax / Allison combo. There is a ton of discussion about what fluid is best for the transmission. Some have said that upgrading to Transynd is the way to go. I converted about 100k miles ago. Primarily because I wanted the transmission to last longer with the extra 75hp the programmer was pushing through it. I am now getting some drips on the garage floor. Is Transynd the culprit? Should I change back to the GM fluid?

What is your take on changing trans fluid over to a TES 295 fluid? I have a 2003 Cummins 400 with the Allison 3000 that came from the factory with Dexron. Also if changing over to TES 295, should it be changed twice (after XX miles) to remove as much of the older Dexron fluid? Thanks in advance for any info, Bill

Let Me Know if You Have Allison Transmission Fluid Questions

237 Replies

lanerd
Explorer II
Apr 19, 2011
Humm.. I thought I answered, but I don't seem to see it anywhere. So, Tom... thanks for the info. I will have the fluid analyzed in three years and go from there.

thanks again

Ron
hzjcm8
Explorer
Apr 17, 2011
ArchHoagland wrote:
It's my understanding that the diesel electrics in train locomotives never change their engine oil. They have a filter that is quite large and it gets changed but not the oil.
Could you shed some light on this?

ArchHoagland,
This could be possible but I'm not sure if it's true or not. I'll have to look into it for you.
ArchHoagland
Explorer
Apr 17, 2011
It's my understanding that the diesel electrics in train locomotives never change their engine oil. They have a filter that is quite large and it gets changed but not the oil.
Could you shed some light on this?
hzjcm8
Explorer
Apr 17, 2011
lanerd wrote:
hzjcm8 wrote:
lanerd wrote:
Welcome Tom... my 08 Safari has the C7 CAT and a 3000mh (built in 07) Allison and as I read in an earlier post (and also in my Allison manual), I'm required to change both filters every 36 months and full fluid change every 48 month. When changing the filters, I will lose almost half of the fluid and am required to replace it (of course). When changing the fluid at 48 months, I assume I do not change the filters, but if I don't pull both filters I also assume I will not get the entire 19 qts (4" pan) to drain. I now have 27,000 miles and recently replaced both the filters and the 19 qts of Transynd. It seems strange to me that the filters are only good for 36 months and the fluid for 48. Will it be detrimental to the trans if I change both filters and fluid every 48 months, or should I change both every 36 months? Due to the price of Transynd, I would like to reduce the amount of good (and fresh) Transynd with the replacement of the lost fluid during the filter change.

thanks, and once again welcome.

Ron

Ron,

See my answer above to Wagonmaster2 about filters. This may help. If not, please keep asking and I'll try to deliver !!!

Ron,
Are you running Allison Gold Series filters or the High Capacity filters? Or are you running some "aftermarket" filters?

I'm using the high capacity part number 29545779. I purchased the Transynd and filter kit from a certified Allison dealer in Bakersfield CA.

Ron

Ron
hzjcm8
Explorer
Apr 17, 2011
wagonmaster2 wrote:
Maybe I've missed an answer to this question in all the great responses but I was wondering how long to run the High Efficiency filters assuming the fluid analysis says the fluid is okay seeing as how Allison says to change the filters every 36 months?
Should the filters be changed every 36 months even if the fluid can be run 60-84 months, or even longer? Mileage only runs around 4,000-5,000 miles per year.

Wagonmaster2
2004 Meridian 36G Allison 3000 Cat C-7 330 HP

Wagonmaster2,
Here's the deal. I believe you can run filters longer but you'll need to run oil analysis and it "must" include particle count and should include ISO Cleanliness Code. Oil analysis will tell you all you need to know about the fluid life (provided you're also getting the TAN (Total Acid Number) information. The only thing a typical oil analysis won't tell you is how much debris (particles/millileter) and the size of the particles (micron sizes) that are circulating through your system. Allison filters are sized to pass finer particles (approximately 30 microns or smaller)so that the filters won't "load up" in a short amount of time. Anything above 30 microns should be trapped by the filter. Generally, the larger the particle, the less there are of them. Tiny particles (around 4-14 microns in size) are abundant in most systems. These tiny particles generally due little harm the transmission unless they are very hard particles like sand (which shows up as excessive "silicon") in an oil sample.

Bottom Line: All systems are different in the way the collect debris and your duty cycle and location are a big part of what gets picked up through the breather. So, filters are kind of difficult to manage. It can be done but it takes particle count data at a bare minimum to do it. Most folks may not want to take that on.
hzjcm8
Explorer
Apr 16, 2011
lanerd wrote:
Did we scare poor Tom off with the multitude of questions?

Ron

Nope. Still here. Been watching grandchildren. I'll have to do this stuff by candle light in the evening !!!

I love helping out. Hope everyone thinks it's good stuff. ALso, I'll always tell you if I can't answer something. Remember, my primary area of expertise is Allison oil specs, oil formulations, oil and additives industry, lubricants, lubrication and oil and coolant analysis.
hzjcm8
Explorer
Apr 16, 2011
sundancer268 wrote:
Is there a way to add the internal oil level sensor to my 3060 S/N 6510026852? This unit was manufactured in 1994 and installed in a Spartan Chassis for Gulf Stream. Thank you.

Sundancer268,

This question is out of my area of expertise. You'll need to call the Allison Tech Line at 1-800-252-5283.

Sorry !!!
lanerd
Explorer II
Apr 16, 2011
Did we scare poor Tom off with the multitude of questions?

Ron
sundancer268
Explorer
Apr 16, 2011
Is there a way to add the internal oil level sensor to my 3060 S/N 6510026852? This unit was manufactured in 1994 and installed in a Spartan Chassis for Gulf Stream. Thank you.
wagonmaster2
Explorer
Apr 15, 2011
Maybe I've missed an answer to this question in all the great responses but I was wondering how long to run the High Efficiency filters assuming the fluid analysis says the fluid is okay seeing as how Allison says to change the filters every 36 months?
Should the filters be changed every 36 months even if the fluid can be run 60-84 months, or even longer? Mileage only runs around 4,000-5,000 miles per year.

Wagonmaster2
2004 Meridian 36G Allison 3000 Cat C-7 330 HP

Forum Discussion

Let Me Know if You Have Allison Transmission Fluid Questions

237 Replies

About Motorhome Group

Related Content

Allison Transmission

Allison 3000 transmission

Allison 3000 transmission

allison transmission

Allison Transmission leak