for those that switch from atf to mtf

Post by **racer12306** » Thu Jan 19, 2006 12:39 pm

i am strongly considering switching to a manual trans fluid after my warrenty is up. i was concerned about getting all of the old atf out and if there would be any issues with the two mixing. i emailed amsoil about this since i currently have amsoil atf in and would switch to amsoil mtf. this info should be the same for anyone that goes from atf to a gear lube in there trans whether it be redline, mopar, amsoil, etc.

I wrote:I currently have AMSOIL Universal ATF in the manual transmission of my 2004 Dodge Neon. When my warrenty is up at 70000 miles I want to put AMSOIL Synchromesh Transmission Fluid (MTF)in the transmission. My concern is the compatability of the two fluids since some of the atf would be left in the trans after a traditional drain and fill. I was thinking that a way to get all of the atf out is to drain the atf and then fill the trans with the mtf and drive it for 500 or 1000 miles. Then drain the "contaminated" mtf and replace with new mtf. My only issue with this is that it would be wasting 3 qts of fluid. Is there a better, cheaper way to ensure that all of the old atf gets out of the transmission?

i received this response:

AMSOIL wrote:In response to your inquiry, great question by the way. Your transmission in both 2004 and 2005 year models takes ATF+4, however all other years takes the GM synchromesh fluid. The new models may go back to the GM synchromesh fluid based on wear reductions as well as increased HP for the new models. As long as you drain the oil while hot, you can refill with AMSOIL MTF and not worry. This is the standard procedure for switching over from one oil to another. There is not any chemicals that like to fight each other in either of the oils, so this switch from ATF+4 to MTF will be smooth. If you wish to use MTF and flush the trans, it may help get any wear particles out and give you better peace of mind.

just figured this info would be helpful to some

Post by **racer12306** » Fri Jan 20, 2006 9:45 pm

wow, figured id get atleast one response out of this. guess people dont worry about this kind of stuff. i know when i decided to go to a mtf the first thing i wondered, "what about the little bit of atf left mixing with the mtf?"

Sparky828 · Post by **Sparky828** » Fri Jan 20, 2006 11:06 pm

give it to a show and have them do a bg flush serive with it.. it leaves virtualy no old tranny fluid left and u should be fine from there jsut give them the new fluid to put in...

Post by **racer12306** » Fri Jan 20, 2006 11:12 pm

even on a manual tranny. didnt know of a flush on those.

Sparky828 · Post by **Sparky828** » Sat Jan 21, 2006 8:57 am

manual transmissions arent as picky as automatic transmissions from what i heard so if you can change from atf+3 to atf+4 in a atx i dont see why it would matter much in a manual... Concitering most people that change fluids in a atx dont get the entire system flushed when they change fluids, so id imagine a lot of the fluid gets mixed with no consiquences.