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Topic: Allison TES:668 (Read 1102 times) previous topic - next topic

Allison TES:668

Allison's new generation fluid Transynd TES 668.

It supersedes Transynd TES 295 and is backwards compatible.

Allison video:

http://www.youtube.com/watch?v=T3XU2BEHBV8

Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Allison TES:668

Reply #1 –
Since Transynd is also full synthetic I will not switch until my current oil change only a month old times out. Thanks for the info on what to buy next time.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Allison TES:668

Reply #2 –
As of now not availible for purchase,if anyone finds it let us know.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Allison TES:668

Reply #3 –
Amazon.com: Castrol TranSynd 668 ALLISON 2021 UPDATED SPEC CASE OF 3 BY DOXA...

Allison Transynd Full Synthetic Transmission Fluid 1GAL 27101-CTCS PACK OF 3...

Transynd Synthetic Transmission Fluid | DMAX Store


$33.99 gal. free shipping over $200 also available to pick up at a number of their locations.
Castrol TranSynd 668, 1 Gallon - Pacific Power Group

As an Amazon Associate Foretravel Owners' Forum earns from qualifying purchases.
Doug W.
96 36' U270 CSGI #4946
04 Toyota Tacoma 4x4
PNW

Re: Allison TES:668

Reply #4 –
Quote from: craneman –
Since Transynd is also full synthetic I will not switch until my current oil change only a month old times out. Thanks for the info on what to buy next time.

Totally agree. Stick with the change interval based on your current fluid/severe duty.  Allison classifies any transmission with a retarder as "severe duty".

And, when you do change, go to the improved TES 668.  I visited with Tom Johnson who helped develop Transynd TES 295 and he highly recommends going to the TES 668 at the next change interval as the additive package is even improved over the TES 295.  Basically, there have been strides in chemistry over the last decade! Take advantage of them.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Allison TES:668

Reply #5 –
Perfect, I will be swapping mine this summer. Thanks for the info!

Re: Allison TES:668

Reply #6 –
I'm still running conventional.  Is there a definitive thread on how to change from conventional to synthetic?
1998 36 foot U270 Build No. 5328 WTFE, 900 watts solar, Victron controller, B2B, bat monitor, 600 AMPH lithium with 2018 Chevy Colorado toad, SKP #110239, Motorcade #17781, 2021 Escape 17B for when Coach is broken down and campsites are too small, retired and full-timer since Dec. 2020. Part of RV family since 1963.

Re: Allison TES:668

Reply #7 –
Quote from: Realmccoy –
I'm still running conventional.  Is there a definitive thread on how to change from conventional to synthetic?


Just do a normal drain, filter change and refill with the new fluid.  Allison 3000 should take 19 quarts.  Least expensive is a 5 gallon pail.

Next change interval will be based on OLD FLUID.

After that next change with the new synthetic fluid, you go to the interval based on the new fluid.

BTW, with a transmission retarder, I would not be running Dexron.  The retarder classifies your transmission as "severe duty" per Allison.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Allison TES:668

Reply #8 –
Does anyone know of a test to determine if fluid is conventional or synthetic?  Blackstone verified that my trans fluid is good to use, but has no test to determine type.
Matt B
1998 u-320

Re: Allison TES:668

Reply #9 –
Quote from: oldmattb –
Does anyone know of a test to determine if fluid is conventional or synthetic?  Blackstone verified that my trans fluid is good to use, but has no test to determine type.

Best I have read you really only know if you changed it or someone before you documented it.

Re: Allison TES:668

Reply #10 –
Great price on Transynd 668 in 5 gallon pail at Amazon prime for 166.84.  I just ordered two pails.
George Mann
2002 U320 #5934
2017 Rubicon
2013 BMW GS
Waterford MI
 

Re: Allison TES:668

Reply #11 –
Sounds like they may have caught up with the oil I used 4 yrs ago. Amsoil Torque Drive for Allison. Like I said at the time after I drained out Transynd and put the Amsoil product in the tyranny was much smoother and cooler.
Did 30-40k miles and never a hic cup.
John
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.