welcome.
and to settle this, in the 2006+ year models, are you supposed to run dexVI? or what.

i run transynd but others have debated forever.
so what's your professional opinion?

 

Dmaxryan10,

Allison published S/N cutoffs for transmissions with DEXRON-VI compatible seals. However, Allison no longer recommends DEXRON-VI for any of their products. TranSynd, or one of the other TES-295 fluids, is the best answer.

 

Welcome!! Your knowledge and willingness to help will definantly add value to the forum!

 

Thanks !!

 

Welcome! Looking forward to you laying down some knowledge for us.

Sent from my DROIDX

 

I'll try to keep up.

PS: I'm doing this because, when I was at Allison, I couldn't be involved but I could see where some forum info was very good but other inputs were flat out wrong. So, I'm here to lend what I know.

Fair enough?

 

Sounds good to me. Welcome to the forum

 

As long as you tell the truth Tom. remember that most everyone on these boards runs programmers and many have built transmissions. Your fluid recommendations might not be correct for clutch material that wasn't tested by Allison.
We all know that TranSynd and Mobil Delvac are the best fluids for stock Allisons and use the same exact package of addatives. The smell the same and have the same texure, so they are clones. castrol and Mobil are the only 2 companys that produce TES 295 fluid and all the other brands that are acceptable to Allison are rebadged from these to companys. The real TES 295 fluids are the absolute best for towing and heat with better lubrication. They are not the best for high preformance use.
Welcome.

 

Mike,

I will always tell the truth. But, I can only talk about what I know. You are correct that I know nothing about aftermarket clutches or chips or anything like that. So, folks should only ask about Allison requirements, specs, oils, etc. and not about aftermarket performance add-ons because I never tested them.

PS: I was always well respected by the oil and additives industry for my contributions and my engineering abilities. Telling the truth was never an issue. I'll always say when I don't know the answer to a question and I'll try to find an answer if I can get input from one of my old friends at Allison.

 

Welcome to DF. Glad you are apart of DF.

Take care,

 

Hot damn!
Good to have you man.

 

Just so you know Tom.....Mike L. is the performance Allison guru.

 

UHHHHH, I am kind of concerned now about the DEX VI. Whats the matter and should we get it out of our transmissions??

 

Allison issued S/N break points for transmissions with and without DEXRON-VI compatible seals. I will try to get those S/N breakpoints for all of you. Allison did this because DEXRON-VI caused Viton (FKM, fluoroelastomer) seals to harden and crack. When I was there, there was never a report of an actual leak in the field but Allison became proactive and changed seal materials to use a "base resistant" type replacement FKM (Viton) seal material in accordance to input from DuPont. The newer seals are fully compatible with DEXRON-VI. So, once I get the S/N breakpoints, I'll publish them and you can decide what to do. Personally, if you have the older S/N, I'd switch to a TES-389 or TES-295 approved fluid. If you're running some other kind of fluid, then I can only advise you on that if you tell me what you're running. I understand from Mike L that a lot of you guys are running very high power levels and are using special high energy clutch materials.

 

welcome aboard man. Glad to have you. The people on this site vary. Some are all stock trucks, just hear to learn and help. Some are mainly race trucks, pull trucks, competition diesel trucks. Others such as mine, are trucks that get used like them but have mods and aftermarket clutches as Mike said.

I myself have been using mobil1 ATF for quite some time, and havent had any problems with it. Between you and Mike, i think the information will grow tremendously on this site

 

X2 on that. And welcome to the DF.:drink

 

Welcome to DF

Sent from my DROIDX

 

Thanks for your input and welcome to the DF!

 

Welcome to the forum. Is there anything wrong with amsoil torque drive? Course I also have aftermarket clutches but for a stock transmission would it cause problems?

 

Chevy71pickupman,

No idea if Amsoil Torque Drive is any good or not. What specification has it passed? I never tested or approved it so I haven't seen the test data. It all comes down to data. "In God We Trust ..... all others must have data."

 

Welcome Tom,

I am new to this forum as well and have little experience when it comes to mechanics, but I'm willing to learn. I have an 06 LLY with the Allison 1000 and just over 85K miles. I have had zero problems with my truck. I use Amsoil and change the oil and filter every 5000 miles. I have been told that I change the oil too much. But, I figure oil is cheaper than an engine. I am considering doing a tranny flush and have had different opinions. Some have said just change the spin off filter and refill the trans. I have even been told that Allison does not recommend a flush. I am also considering using Amsoil Low Viscosity Synthetic (ATLQT).
I would like it very much to get the straight scoop from a professional such as yourself.
Thank you for your advice,
Bud

 

welcome!...i believe you will be a great asset to the forum and i see many debates coming up...lol

like bud mentioned i am wondering the same thing...there is a general consensus that flushing the transmission with a machine is not good for Allisons, but many people on here use the "hoot method"...many just drain and refill...what are your thoughts and suggestions?

 

A BIG Welcome to this forum. It will be great to have someone on board who can seperate fact from opinion. There seems to be a great deal of mythology surrounding the Allison. Looking forward to learning.

 

Welcome to the DF and thank you in advance for any and all information you provide.

 

Awesome, Welcome to the DF!

 

Welcome to the DF. I recently purchased my truck and this is my first diesel. I plan on owning my truck for a long time and doing all of my own maintenance. The S/N breakdown for DexVI would be very helpful. Thanks. Can TranSynd be used in the transfer case?

thx again!

 

Seal serial # cutoff



From another forum.
Hope this helps.

Short answer, DEX6 resistant seals went in beginning with the 2007 start of production (June, 2006). The serial break for Allison trans in GM pickups is 6320784373, meaning that trans built with that S/N or higher have the new seals.

 

Welcome and thanks for signing up.

 

Koooom-by ya my lord Koooom-by ya.. Welcome to the forum. Just like a women. 3 choices,

 

now you get a chance to learn more of the modded allisons and what fluids are being used. ?? have you ever tested the devron products and if so what do you think thanks.

 

What the hell is a devron product?

 

I think he meant chevron lol :newly

 

Or dexron...

 

Ok Welcome to the forum, Mike you rebuilt my trans last sept what fluid is in there, but that shouldnt matter cuz I will only bring it to you for service.