Is it necessary to replace all the fluid when switching to synthetic or can I just refill with 7 qts? I've got
Mercon V now in my Ranger.
Mercon V now in my Ranger.
Switching to synthetic trans fluid
- Thread starter vincent714028
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Undummy is correct as usual, but you will get the full benefit of the synthetic fluid by doing a complete flush. One could also exchange a little here and there as well to get the most syn in as possible.
What brand Mercon V did you use?
I am thinking of trying Transynd in my Ford C6 of 1977 vintage, it calls for Dextron now, so hopefully when I do finally get around to switching it will be alright.
Will have to remember to try and flush it out.
You will have to let us know what synthetic you try.
Will have to remember to try and flush it out.
You will have to let us know what synthetic you try.
i'm going to do the same thing to my F150...get that JL garbage out by just popping the drain plug...then will do the filter in another 30k...
i have no idea what JL used....
i have no idea what JL used....
I flushed mine out when i switched over although its better to do it that way its not really necessary.
Transynd rules. Its one of the few full synthetics that is NOT overly HFM'd for multivehicle usage. IMO, it's one of the best synthetic DexonIII's for Dexron/Mercon usage.
Heres a thread with the ratio calculator when doing partial drain/refills.
http://theoildrop.server101.com/forums/showflat.php?Cat=0&Board=UBB16&Number=495831
Most flushes at dealers and quick lubes that I've witnessed were relatively incomplete. I don't see ANY method as 'best'. Shop tech competence plays a big role when doing a machine flush. Fluid quality is also something to consider when going somewhere for service. If possible, purchase your own fluid or specifiy one from the shops selection. Don't allow them to use any cleaning or treatment additives. And, always watch the service. Make sure that your chosen ATF finds its way into the flush machine that will be connected to your vehicle.
I've also serviced several known lemon transmissions. These lasted longer with partial drain/refills vs the transmissions that had extended interval flushes. IMO, constantly refreshing the ATF viscosity, removing suspended wear, and refreshing the additive package, seems to be better then waiting then for 'extended interval flushes'.
Ryslvstr, if you visit Jippylube, all you have to do is ASK which fluid they are using and check your owners manual to see if it is compatible. Most quicklube places carry specific brands which usually offer various specs. Just make sure they fill their flush machine with the fluid of your choice. And, upgrade where possible if possible. ATF+4 is better then ATF+3. MerconV is better then Mercon/Dexron. DexronVI is better then DexronIII. And, some multivehicle ATFs are better then Mercon/Dexron/MerconV.
Heres a thread with the ratio calculator when doing partial drain/refills.
http://theoildrop.server101.com/forums/showflat.php?Cat=0&Board=UBB16&Number=495831
Most flushes at dealers and quick lubes that I've witnessed were relatively incomplete. I don't see ANY method as 'best'. Shop tech competence plays a big role when doing a machine flush. Fluid quality is also something to consider when going somewhere for service. If possible, purchase your own fluid or specifiy one from the shops selection. Don't allow them to use any cleaning or treatment additives. And, always watch the service. Make sure that your chosen ATF finds its way into the flush machine that will be connected to your vehicle.
I've also serviced several known lemon transmissions. These lasted longer with partial drain/refills vs the transmissions that had extended interval flushes. IMO, constantly refreshing the ATF viscosity, removing suspended wear, and refreshing the additive package, seems to be better then waiting then for 'extended interval flushes'.
Ryslvstr, if you visit Jippylube, all you have to do is ASK which fluid they are using and check your owners manual to see if it is compatible. Most quicklube places carry specific brands which usually offer various specs. Just make sure they fill their flush machine with the fluid of your choice. And, upgrade where possible if possible. ATF+4 is better then ATF+3. MerconV is better then Mercon/Dexron. DexronVI is better then DexronIII. And, some multivehicle ATFs are better then Mercon/Dexron/MerconV.
I did ask them, i've been going round and round with the regional manager via email about what the heck they put in it...it's some generic garbage that they "added a modifier to in order to meet the Mercon V specs"
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