When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
so i did a flush on my truck's transmission, i disconnected at the bottom of the cooler in front of the radiator. i expected flow to come out of the bottom of the cooler, to my surprise, it cane out of the hose,
this means the flow goes into the bottom of this cooler, out of the top of it, into the top of the radiator cooler, out the bottom and back to the transmission.
is this correct, or is it backwards. seems like it is backwards to me, if so, how do i fix it?
Thanks
Using the cooler to flush is asking for expensive trouble on the 6R80. Don't be the guy the that ruins his transmission. This procedure works on older units. The transmission also has a temperature bypass for the cooler lines. Here is the basic layout of the cooler lines (ignore the 6.2, it's on all the pages)
ok, so stupid old guy here.
#1 how does flushing that way ruin the transmission? and since that is what i have done, what should i be looking for? i never let the flow run dry. there seems to be many that are done that way on line, but never a follow up as to if there are issues.
#2 so according to the diagram, it appears mine is flowing backwards, how do i fix that, is that as simple as swapping the lines and the quick connect fittings, are they the same size? i do not have the tool, what could have caused this?
The 6R80 can't be operated if the solenoid pack is not covered in fluid, you risk burning them up. I don't know of anyone that has done a cooler line flush on a 6R80. You can't because of the thermostat in the transmission and the fluid only flows when needed. If more critical is the filling of the transmission and the fluid level.
As stated, The 6r80 has an internal thermostat that restricts flow to the coolers when the fluid is cold.
the best way to service this by yourself is to just drop the pan and refill. Doing this will get about 1/2 or a little more of the fluid changed.
do it two more times if you really want to get the most of it.
a few years ago our shop did the fluid and filter in my 2010 F-150, I think they said it took 7-8 quarts to refill after dropping the pan.
Other than that, it pretty much takes a heated flush machine to get this job done. There is a type of machine that pumps in new fluid through the filter and let’s the old fluid spill out over the valve body, but I’m not sure who -if anyone- still uses those.
I have a 2014 F150, V8 w/ the 6 speed trans. Having conflicting answers on checking trans fluid level. Engine running or not? In Park or N ? Hot of course.
I checked it myself hot and running in Park, doesn't even show on dipstick. Asked dealer to do it while in for oil change, they say "Full" and BTW "trans fluid has a sheen on it, trans ready to fail" . (82,000 on it, runs/shifts fine. I NEVER trust a dealer, but oil change was cheap)
Now before I go nuclear, I had a friend check it like I did yesterday. Nothing on dipstick at all.
So save me from being an A**hole at the dealer, what is the correct procedure pls?
So anyway, (having read the manual before posting the thread), it STILL doesn't say "running" or not. Took it to a dealer, they put it up "running" and it WAS low. So it's a win-win.
sibernut - So anyway, (having read the manual before posting the thread), it STILL doesn't say "running" or not. Took it to a dealer, they put it up "running" and it WAS low. So it's a win-win.
As per the service manual...
.
With the engine running, place the transmission selector lever in each gear position, holding approximately 5 seconds in each position. Place the transmission selector lever in PARK.
Check level with transmission at operating temperature on level ground idling in park.
if you are doing all the above and it is not on the dipstick, then it is low. Ignore cold marks on dipstick, only pay attention to the hot marks.
6r80 is filled with Mercon LV. It will be dark. It goes in red and turns dark in short order. Color is not a good indicator of fluid quality with Mercon LV.
given that it is low and probably has been for quite some time, and given the mileage, I would drop the pan and refill with fresh at least once. Change the filter I’d you want but there really is no need. If the filter is plugged, it is because the trans has already failed - which I doubt will be the case.
plan for about 8 quarts for a pan drop and refill.
our shop did a pan drop and filter change at about 60,000 miles on my 2010 and it made a noticeable difference in transmission feel. 80,000 miles is not too early to do a fluid change.
do not pay someone to do a fluid change with an exchange machine. The transmission has an internal thermostat that only sends fluid to the coolers when it is hot. My mechanic tried it and ended up wasting about 32 quarts of fluid before it started to come clean and had to get the trans hot a coupe of times just to get the fluid to flow through the cooler lines and exchange machine. If you want a better fluid exchange, then drop the pan fluid and refill 3 times. That will get between 80 and 90 percent of the fluid exchanged, which is pretty good.
Check level with transmission at operating temperature on level ground idling in park.
if you are doing all the above and it is not on the dipstick, then it is low. Ignore cold marks on dipstick, only pay attention to the hot marks.
6r80 is filled with Mercon LV. It will be dark. It goes in red and turns dark in short order. Color is not a good indicator of fluid quality with Mercon LV.
given that it is low and probably has been for quite some time, and given the mileage, I would drop the pan and refill with fresh at least once. Change the filter I’d you want but there really is no need. If the filter is plugged, it is because the trans has already failed - which I doubt will be the case.
plan for about 8 quarts for a pan drop and refill.
our shop did a pan drop and filter change at about 60,000 miles on my 2010 and it made a noticeable difference in transmission feel. 80,000 miles is not too early to do a fluid change.
do not pay someone to do a fluid change with an exchange machine. The transmission has an internal thermostat that only sends fluid to the coolers when it is hot. My mechanic tried it and ended up wasting about 32 quarts of fluid before it started to come clean and had to get the trans hot a coupe of times just to get the fluid to flow through the cooler lines and exchange machine. If you want a better fluid exchange, then drop the pan fluid and refill 3 times. That will get between 80 and 90 percent of the fluid exchanged, which is pretty good.
serving suggestions.
Even my Ford dealer did a pan drop and filter change on my 2011 truck. I had it done around 80K ish and it did make a noticeable difference.
meborder... do not pay someone to do a fluid change with an exchange machine. The transmission has an internal thermostat that only sends fluid to the coolers when it is hot....
There are exchange machines (e.g. FoMoCo dealerships) that can perform the fluid change taking into consideration the internal thermostat.
.
There are exchange machines (e.g. FoMoCo dealerships) that can perform the fluid change taking into consideration the internal thermostat.
.
correct.
some dealerships have them, many do not. Very rarely will you see an independent shop that has one.
the proper machine has a way of heating the fluid going into the trans to keep the thermostat open so that an exchange can be done through the lines in a conventional way.
if they have a heated fluid exchange machine, that is probably the best way to do an exchange. If they do not have a heated machine, just do the pan drop and call it a win. Do it 3 times for a more complete exchange.
Pan drops don’t ever get all of the fluid, but the solution to pollution is dilution.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
