Mobil Delvac 1 synthetic ATF/Allison B500/26k miles

[jetman]

Latest Used ATF Analysis Report 10-20

We didn't know what ATF was in our Prevost motorhome 1995 Allison B500 6 speed automatic when we bought it almost 7 yrs ago. We changed the fluid & filters soon after purchasing it with Mobil Delvac 1 Synthetic ATF, an Allison approved TES295 fluid. The tranny holds about 10gals, but you can only get 6 to 7 gals out when doing a fluid filter change. So now, after 2 changes, it should have mostly Mobil Delvac 1 synthetic ATF in it.

We took this ATF sample when doing this change and sent it to JG Lubricant Services Houston TX lab for analysis. Again, the results and a ph conversation with Tom Johnson, aka "Mr. Transynd", indicate there's nothing to be concerned about. This fluid and filters were 6+ yrs old w/26k miles. The bus has 94k miles since new.

JG Lub Serv Tech Sheet

What say you?

 

[nascarnation]

We ran that stuff in NYC refuse trucks (one of the toughest vocations) for 75000 miles, drained it out, put it in a new transmission in our (Allison) lab, and ran our life validation test. And it worked fine. That Transynd is hard to kill.

 

[MolaKule]

I can understand the copper coming from the cooler coils but where does the lead come from?

Does this transmission have copper-lead alloy bushings in it?

 

[nascarnation]

Yes. The ones built today may not, but this transmission was mfg 25 yrs ago.

 

[jetman]

Our latest used ATF analysis-From JG Lubricant Services

Comments: Data indicates no abnormal findings. Resample at normal interval.

Mobil Delvac 1 Synthetic TES295 ATF, 10 mths and 6,000 miles since the fluid and filters were last changed. Its a 1995 Allison B500 has 100,200 miles since new. Fluid and filters were last changed Oct. 2020. This was the second time we've changed the ATF and filters in the 7+ yrs and 34k miles that we've owned the bus.