Originally Posted By: Langanobob
Originally Posted By: MolaKule
THF has a 9.7 cSt viscosity@100C with a
specific additive package for heavy duty wet clutches in Farm and Construction equipment.
Dex/Merc and Mercon V fluids have a viscosity averaging 7.3 cSt@100C with a
specific additive package for the ATF.
The
specific additive packages for each type of fluid have different friction modifier chemistry for each application.
If the dipstick in the E40D says Mercon, put in Mercon or a Dex/Merc equivalent. If it says Mercon V, use a Mercon V.
Did Lubrication Engineers also suggest putting LE 7500 in your E40D or was that a decision you made on your own?
Either way, I think it was a bad choice.
MoleKule, thanks for your comments. I am not smart enough to make decisions like running the LE7500 in my E4OD, that reccomendation came straight from LE. It’s been in there for about 40,000 miles and so far I really can’t say if the results have been good or bad, maybe just indifferent.
I understand about the different friction modifier requirements for different transmission manufacturers, but then Mobil 1 is an example of an ATF that, according to Mobil, meets multi vehicle requirements. I don’t think they use the term universal, but there is no warning about “don’t use this in...” How do they manage that?
When I first ran across your handle or screen name I thought you must have Polynesian ancestry. Then I put the two names together - doh!
Not Polynesian but I do have Polynesian friends; 2/3 American Indian with Irish, English, and Scotch in that descending order or parts per million. I figure anything after American Indian is "decending."
If that suggestion came from LE, I think I would change suppliers as I think it was not an educated nor correct response from them.
I would change the E40D fluid back to Mercon or an equivalent for the reasons I stated above.
A well informed owner will look at the Product Data Sheets like
https://www.mobil.com/english-us/passenger-vehicle-lube/pds/glxxmobil-1-synthetic-atf
In making decisions in terms of appropriate application and usage of a specific fluid.
Mobil doesn't say I can't use Mobil 1 ATF in an engine or for frying chicken, but do you really think that would be prudent?