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Transmission Service

8.7K views 31 replies 9 participants last post by  Devious  
#1 · (Edited)
Anyone care to share knowledge in regards to checking fluid in the trans? I have a sneaking suspicion where the dipstick is but want to know what other owners have experienced with their trans service. And if you had to take it to the dealer to have it serviced. 06 LE 4x2 Automatic. Let me know what you know.
 
#4 ·
the trans is one thing ive always stayed away from. but the obvious part of it, is changing your tranny oil. there is a little drain plug on the tranny just like the oil. so that would be simple enough to change. but i have no clue on any "tricks" that you shoul know like when changing the oil. but other than that i have no clue.

but i am curious if its simple or not. im tired of paying people to do work i should be able to do my self
 
#6 · (Edited)
make a note of that our trans take nissan Matic-J fluid, i wouldn't not go to local shop to do the drain and fill or even tranny flush, i would either DIY drain and fill every 30k or local nissan.

u have 2 choices of drain and fill,

1. removed the drain plug,drain the oil replaced drain plug washer and re-installed. and add about 4 1/4 of Matic J fluid.

2. removed the trans pan, cleaned the filter and bottom of the pan, replaced the trans pan gasket and re-install, it will take about 4 3/4 of matic J

while your doing the trans, u might wanna consider replacing transfer case fluid, they really go black or brown color fast. transfer case fluid take a regular tranny fluid dextron II,III.
 
#11 · (Edited)
i was told by my instructor to never drain the fluid of an auto tranny yourself then just pour more in. it needs to be done by a flushing machine (like the coolant system). otherwise you will end up with air in your tranny and it will either shift wrong causing excess wear or it will get fluid to some parts and not to others causing grenading. if you have an auto trans, call around to local shops to find the lowest (fair) price and get it flushed there... that way if something goes wrong, it's on them, not you! keep in mind, auto transmissions are one of THE most complicated part on any vehicle. there's lots of moving parts and lots of little things that can go wrong and wear them out too fast...

manuals on the other hand are easy, you pull the drain plug, let drain, then fill to the inlet whole above. done!:-D
 
#12 ·
i have never heard that and i personally have done at least 10 trans drains and refills, including on not to long ago on my XJ and have never had a problem. you may want to get your instructor to quote his sorce on that. i older cars, like the aw4 auto in the XJ's and wranglers, they dont reccomend a flush if you havent changed the fluid on a regular basis.
 
#13 · (Edited)
Athomash55 said:
i was told by my instructor to never drain the fluid of an auto tranny yourself then just pour more in. it needs to be done by a flushing machine (like the coolant system). otherwise you will end up with air in your tranny and it will either shift wrong causing excess wear or it will get fluid to some parts and not to others causing grenading.

Does your instructor heard about breather hose on transmission . and what school is this?

Athomash55 said:
i was told by my instructor to never drain the fluid of an auto tranny yourself then just pour more in. it needs to be done by a flushing machine (like the coolant system). otherwise you will end up with air in your tranny and it will either shift wrong causing excess wear or it will get fluid to some parts and not to others causing grenading.
im so sorry, your instructor is not giving you the right info, trans is different from cooling system air in the system cause overheat, BUT trans air in the system does cause over heat inside the trans that why there's trans cooler built in the radiator. and ALL auto transmission part they get wet with tranny fluid from torque converter, clutch pack, valve body etc
 
#14 ·
Mylt1 said:
i have never heard that and i personally have done at least 10 trans drains and refills, including on not to long ago on my XJ and have never had a problem. you may want to get your instructor to quote his sorce on that. i older cars, like the aw4 auto in the XJ's and wranglers, they dont reccomend a flush if you havent changed the fluid on a regular basis.



I second that.
 
#15 ·
Frontier2 said:
We do flushes on them at the Dealer.There included in the BG 30,000 mile services we do.

u might wanna ck your tranny flush machine, it might work on older model nissans that dont take J-matic fluid.
 
#17 ·
i get what your saying, but i didn't say the right thing apparently, this machine that we use to change the fluid is made for auto transmissions. you take both trans coolant lines loose, and put the system in there. it pulls out the old fluid while filling up the new fluid (yes it takes more than the total amount) while the vehicle is on allowing all the parts to absorb the new fluid. this supposedly keeps air out of the "system". when you take your vehicle to a shop to do this service it's the same setup... i can't argue with that...
 
#18 ·
Athomash55 said:
i get what your saying, but i didn't say the right thing apparently, this machine that we use to change the fluid is made for auto transmissions. you take both trans coolant lines loose, and put the system in there. it pulls out the old fluid while filling up the new fluid (yes it takes more than the total amount) while the vehicle is on allowing all the parts to absorb the new fluid. this supposedly keeps air out of the "system". when you take your vehicle to a shop to do this service it's the same setup... i can't argue with that...

i know what machine ur talking about, the BG flush machine, and i know its the same set or hook the machine but my question to you ,is that machine espcially for D fluid only not for J-matic.

one more thing why u keep saying that keeps air out of the system, u might wanna read more about transmission.
 
#19 ·
i don't think it's specific to any particular trans fluid. it's just a pump more or less. instructor dude said if you just pour in the new fluid air can get caught under parts in the trans. it will move upward but as it does it can cause problems that cause alot of wear, espcially if it gets in the valve body...
 
#20 ·
Athomash55 said:
i don't think it's specific to any particular trans fluid. it's just a pump more or less. instructor dude said if you just pour in the new fluid air can get caught under parts in the trans. it will move upward but as it does it can cause problems that cause alot of wear, espcially if it gets in the valve body...
Try t find out which particular transmission your instructor is talking about. I have never heard of such a concern for air in an auto. I have done many drain and refills where I work with zero problems on automatics.
 
#21 ·
i messed up my ram doing it, so i had to do it again with the machine. he said it was the only way to make sure that all the old fluid was out.
 
#23 ·
mine was a 99 although there isn't any difference, i'm not really sure what exactly messed up but it quit holding gears because air got trapped in it. i used the right fluid both times. doing the service helped enough to get it to a dealership without them noticing which was good but it was doomed and a pricey repair...
 
#24 ·
there yas something already wrong with your trans then. i have never had a machine used on any of my trans and have never had a moments problem nor do i know anyone that has ever had problems. as far as the total drain thing it is true, unless you remove the trans cooler line. you have to do a little extra to do a "FULL" drain on somehting with a trans cooler but its still nothing thats to hard. just have to know how to do it. bu i have still refilled by just pouring the new fluid down the dipstick tube.
 
#25 ·
Mylt1 said:
there yas something already wrong with your trans then. i have never had a machine used on any of my trans and have never had a moments problem nor do i know anyone that has ever had problems. as far as the total drain thing it is true, unless you remove the trans cooler line. you have to do a little extra to do a "FULL" drain on somehting with a trans cooler but its still nothing thats to hard. just have to know how to do it. bu i have still refilled by just pouring the new fluid down the dipstick tube.
I can't see how any air can get trapped in the tranny. The pump draws the fluid from the pan through the filter and fills the hydraulic circuits so any air would be bled out in short order. IMO it's no different from draining and refilling your oil pan. Hydraulic pumps don't pump air very well but in most cases the vehicles stops moving when the fluid level drops too low.