I have a headache researching transmission fluid
#21
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And, also, I noticed a lot of them are full-synthetic... will that be a problem mixing it with standard fluid (since I really can't drain ALL of the original fluid)??
#22
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Regardless of what ATF you select, plan on doing a couple of successive drain-and-fills. Maybe 3,000 to 5,000 miles apart if you're comfortable with that interval, or sooner if you prefer. That way, 80% to 85% of your fluid will be the "new" ATF by the time you've done the second procedure. It sure worked for my 2005 S-Type. We did the drain-and-fills about 5,000 miles apart in November 2014 and again in October 2015....
#23
#24
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I do not flush, I drain-and-fill. Having the transmission reflashed by a dealer familiar with the procedure is only recommended when rough shifts remain after a drain-and-fill. I have done that twice on my wife's 2006 XK8 (once in July 2013 and again in April 2016) and it resolved the shift quality issues both times. I have also drain-and-filled my 2005 S-Type twice without having to do the reflash either time. Both vehicles are running Mercon SP ATF in their ZF 6HP26 units....
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TucsonDave (03-10-2017)
#26
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Actually, there is flush-and fill, reset, and reflash.
Flush-and-fill is changing the fluid, and applying the proper refill procedure (temperature based).
Reset is when you have rough shifts. It is a software procedure to reset the adaptations. It is followed by a learning phase (normal driving) for 100 miles. My understanding is that the software parameters related to the particulars of your transmission valves are initially forgotten ("reset") and then re-learned for a while with the new fluid. It is performed by dealer-type software on a laptop.
Reflash is the updating of the code in the transmission control module (think software update like Windows or a phone). It is for when you have someone determine your code is old (or even original) and there is a recommendation by Jaguar to update to fix a specific issue.
Flush-and-fill is changing the fluid, and applying the proper refill procedure (temperature based).
Reset is when you have rough shifts. It is a software procedure to reset the adaptations. It is followed by a learning phase (normal driving) for 100 miles. My understanding is that the software parameters related to the particulars of your transmission valves are initially forgotten ("reset") and then re-learned for a while with the new fluid. It is performed by dealer-type software on a laptop.
Reflash is the updating of the code in the transmission control module (think software update like Windows or a phone). It is for when you have someone determine your code is old (or even original) and there is a recommendation by Jaguar to update to fix a specific issue.
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#27
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Hi
Hope this turns out OK. My local indie Jag shop is flushing my tranny with about 12 quarts of Pentosin. First running a chemical to clean, then pumping out entire contents of tranny with new fluid - should be 100% new fluid. Said they don't typically need to change the filter, as the fluid gets worn, but not that dirty.
SO, I am trusting them as it seems like the benefits of all-new fluid might outweigh the benefits of 75% new fluid and a new filter.
Anyone else get this suggested treatment? My XJ8 has 111,000 miles, shifts fine, just doing this as a precaution.
For the record, even with all the fluid, cost is about $375.
Hope this turns out OK. My local indie Jag shop is flushing my tranny with about 12 quarts of Pentosin. First running a chemical to clean, then pumping out entire contents of tranny with new fluid - should be 100% new fluid. Said they don't typically need to change the filter, as the fluid gets worn, but not that dirty.
SO, I am trusting them as it seems like the benefits of all-new fluid might outweigh the benefits of 75% new fluid and a new filter.
Anyone else get this suggested treatment? My XJ8 has 111,000 miles, shifts fine, just doing this as a precaution.
For the record, even with all the fluid, cost is about $375.
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