Castrol TranSynd 668 VOA

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NissanGuy91

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Transynd-668-.png
 
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Thanks, @NissanGuy91 . I just did a drain & fill in the MD3000 that is in my motorhome. There were no service records available when I bought my motorhome, so I don't have any idea which transmission fluid was in it, or how long it had been ran. But Transynd 668 went in. While I have no idea what additives make a great transmission fluid, it is interesting to see what is there. I suspect there may be some characteristics that are critical to good transmission function, that may not necessarily be shown here? IDK.

Everything I read suggests that it is a very robust transmission fluid. But buying 5 gallons at a time, along with filters, ain't cheap.
 
BHopkins said:
Thanks, @NissanGuy91 . I just did a drain & fill in the MD3000 that is in my motorhome. There were no service records available when I bought my motorhome, so I don't have any idea which transmission fluid was in it, or how long it had been ran. But Transynd 668 went in. While I have no idea what additives make a great transmission fluid, it is interesting to see what is there. I suspect there may be some characteristics that are critical to good transmission function, that may not necessarily be shown here? IDK.

Everything I read suggests that it is a very robust transmission fluid. But buying 5 gallons at a time, along with filters, ain't cheap.
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No worries @BHopkins. I have acquired a large quantity of Castrol TranSynd 668 from a auction and had a VOA done to make sure the fluid somewhat resembled ATF before it was used. A VOA and my limited knowledge is the best I can afford as far as to determine the quality of the ATF. I agree that there are some characteristics that wont show in the VOA but so far have had good results in the application that the ATF is being used in.
 
NissanGuy91 said:
No worries @BHopkins. I have acquired a large quantity of Castrol TranSynd 668 from a auction and had a VOA done to make sure the fluid somewhat resembled ATF before it was used. A VOA and my limited knowledge is the best I can afford as far as to determine the quality of the ATF. I agree that there are some characteristics that wont show in the VOA but so far have had good results in the application that the ATF is being used in.
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I hope you did well on your purchase. Considering what you are looking for, you may consider sending a sample to this lab.

https://www.jglubricantservices.com/home.html

It is owned by a man who was an Allison transmission fluids engineer, and was directly involved in the development of Transynd. He is a member at IRV2.com, and is extremely helpful in answering questions about Allison transmissions and fluids.

If you tell him what you are looking for, I suspect he will gladly be able to confirm that what you have is Transynd 668.
 
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Viscosity is interesting, it's sort of inbetween traditional Dex III type vis in the low-mid 7s and LV types in the 5.7-6.3 range.
 
Brons2 said:
Viscosity is interesting, it's sort of inbetween traditional Dex III type vis in the low-mid 7s and LV types in the 5.7-6.3 range.
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Indeed, and that's the beauty of it: you can run this in just about anything, from transfer cases, to any step shift automatic. It's as universal as ATF can get!
 
Rod Knock said:
Indeed, and that's the beauty of it: you can run this in just about anything, from transfer cases, to any step shift automatic. It's as universal as ATF can get!
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This rates a meh for me, any TES 668 fluid seems mostly available in 5 gallon pails and 55 gallon drums, I looked at data pages for Castrol, Chevron and Mobil TES 668 fluids. I did find a 1 gallon container of Castrol 668 at Napa but it's $52 a gallon, that is HPL green territory price wise. You can buy the Castrol 5 gallon pail on Amazon for $192, which works out to $9.60 a quart, not too unreasonable, but for my 6R80 I'd 22.5 quarts exactly for 3 drain and fills so now I have to buy two 5 gallon pails? Yeah, not exactly home garage DIY friendly, and there are other good fluids out there that I can buy more tailored to my needs.

If there is some magical source out there I didn't find that has TES 668 fluids in quart and gallon sizes for something not approaching Group V pricing, I'd be more interested.
 
BHopkins said:
I hope you did well on your purchase. Considering what you are looking for, you may consider sending a sample to this lab.

https://www.jglubricantservices.com/home.html

It is owned by a man who was an Allison transmission fluids engineer, and was directly involved in the development of Transynd. He is a member at IRV2.com, and is extremely helpful in answering questions about Allison transmissions and fluids.

If you tell him what you are looking for, I suspect he will gladly be able to confirm that what you have is Transynd 668.
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@BHopkins Thanks for the link! Very useful info!
 
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Rod Knock said:
Thank you for posting. The additive package looks identical to Mobil 1 LV ATF HP (Dexron HP) and HPL Blue/Green ATF. Which means it also uses the same friction modification chemistry and anti wear package.

This also means that this ATF can be run in any step shift automatic transmission, starting with those oldies calling for Dexron III, ATF+ 4, all the way up to the latest transmissions, including ZF 8-speed, 9-speed, and Ford/GM 10-speed transmissions.

At this point, the only difference between the ATFs that use the additive package is the base oil composition (I've seen it done with Group III, PAO, and GTL), and viscosity, which doesn't matter much, unless you're running the transmission hard and hot. Then you're better off with more viscosity.

Finally, this family of ATFs beats anything that AMSOIL and Red Line have to offer. It also beats Valvoline MaxLife by a long shot. It's the absolute best ATF chemistry available today.

Life is good!
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@Rod Knock Glad I am able to help and contribute! I'm currently using tes-668 in a Jatco JR711E transmission that calls for matic s atf with excellent results. I accept the risk for using the atf off lable but its the best the transmission has ever shifted. Have you used tes-668 in any of your own rides with good results?
 
NissanGuy91 said:
@Rod Knock Glad I am able to help and contribute! I'm currently using tes-668 in a Jatco JR711E transmission that calls for matic s atf with excellent results. I accept the risk for using the atf off lable but its the best the transmission has ever shifted. Have you used tes-668 in any of your own rides with good results?
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So far I have used TES-668 in transfer cases only. However, I plan on replacing the Red Line D6 ATF in my mother's 2017 Hyundai Santa Fe XL with Castrol TranSynd TES-668. This model SUV has a undersized 6-speed automatic transmission that "cooks" ATF at over 200F on a regular basis. The higher viscosity of the TES-668 should help with that. In another identical Hyundai I run Mobil 1 LV ATF HP, which uses the same add pack, but is blended with GTL and is lower viscosity. The results are excellent, the transmission has never shifted better than it is now.
 
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