Recent content by MR_TRANSYND

Yep. I agree. BITOG members should practice annual fluid analysis (oils and coolants). I recommend you sample the engine oil, the engine coolant and the automatic transmissionmission fluid. Also, if you're an RV owner (Type A, B or C), also sample the generator oil and coolant on...

Yes. Most assuredly it is.

38Chevy454, All the work on TES-295 was based on previous work at GM on the DEXRON-IIIG/H specifications. Castrol (and an additive company that will remain unnamed) took the DEXRON-III Automatic Transmission Fluid specification and "tweaked" it to make it far more stable. Improvements...

Originally Posted By: MR_TRANSYND I believe TES-468 was published after I retired. I did the early test design work and test requirements while I was still there. The difference is that the TES-468 specification includes some additional testing, over and above the TES-295 specification...

I believe TES-468 was published after I retired. I did the early test design work and test requirements while I was still there. The difference is that the TES-468 specification includes some additional testing, over and above the TES-295 specification, specifically aimed at protecting Allison...

Sorry. I just saw this. There hadn't been much activity on this thread. I talked to Allison yesterday (9/29) and it is still in review. It's taking forever !!!! I wrote most of the spec before I left in 2009.

Originally Posted By: 901Memphis Is Transynd appropriate for a 4T65E? 901Memphis, Yes. No problem at all with TranSynd in a GM 4T65E.

Originally Posted By: kschachn But not the cracking of the seals, right? It wouldn't have some distinctive analysis signature that would show that, would it? Originally Posted By: MR_TRANSYND If you've got a 2003, then you cannot use DEXRON-VI. It will harden and crack the Viton seals. Use the...

Originally Posted By: T-Stick The owner's manual calls for mercon--which Ford does not make anymore. Ford at first said do not use mercon v, but then they reformulated their mercon v and published a bulletin which states that mercon v replaces mercon--which means that now mercon v is a...

Originally Posted By: T-Stick I know your specialty is the Allison transmissions, but I thought perhaps your familiarity with the Dex/Merc/TES-389 fluid specification might cause you to have an opinion as to whether a Mercon V fluid is as good the original Mercon in an older Mecon specified...

Originally Posted By: MolaKule Originally Posted By: Trav It is strange the fuel contains compounds that can attack Viton. I talked to the manufacturer today. They use different grades and types of Viton for fuel systems. The ones i am using are resistant to these chemicals, methanol and bio...

Originally Posted By: kschachn I agree. I worked as a research technologist for a large corporation, my work was in materials characterization. We used all sorts of fluorinated polymers, never did I see anything that would cause Viton to harden or crack. Originally Posted By: MolaKule I do know...

Originally Posted By: zzyzzx MR_TRANSYND, Have you ever rebuilt a transmission? Nope. Sorry !!

Originally Posted By: JHZR2 I have a question about older specs. Notionally Allison had an ATF spec back in the old Dexron II days as well. I have a number of applications that originally specified Dex Ii, and are old fashioned AT variants (vacuum controlled and use a Bowden cable to adjust...

Originally Posted By: DWC28 Tom, why did you remove the original PAO 100 and replace it with VII in Transyn? DWC28, Do you know this to be the case???? If so, then you know more about the product than I do. It would surprise me (and probably Allison too) if that were true !!!!