Just bought an 09 rubicon unlimited about a week ago. It had a transmission leak so I replaced the gasket and filled it back up with fluid. Other then that was having no problems no codes are anything. Now since putting in the new fluids and driving I'm getting 2 different error codes one is p0731 gear 1 incorrect ratio the second one being p0486 transmission fluid pressure sensor. Does anyone have any idea what might be happening or how to correct this issue.
Transmission problem
- Thread starter Millz24
- Start date
C.J. Roberts
TJ Addict
I don't know a lot about auto trannys, but I have to ask, did you use the right kind of fluid, (ATF3, I believe), and did you fill it properly, that is check the fluid level while it was running and after shifting through all the gears?
I used mopar Atf +4 which was what was recommended when I looked it up. When I test it cold its above the hot line when I test it after running it for awhile and going through the gears and check the dipstick it's like there is no fluid in it.
Your Wrangler is a JK model manufactured from 2007-2017. This is the forum for the 1997-2006 TJ's.
Your question would be better suited over at the Wrangler JK Forums. These guys can give you better more focused help.
Good Luck.
C.J. Roberts
TJ Addict
Then you're low on fluid. Add fluid until it shows full when running.
So originally when I filled it I put in 5 qts because it wasn't reading on the dipstick at 4 qts ran it and it ran great for a day then started sending me the codes so I parked it not wanting I do more damage . I thought maybe I put in to much fluid so yesterday I pumped out a qt and ran it again hoping that was the fix, but it was even worse any time I hit the gas it would just rev high and eventually get into gear
You need to be checking its ATF level correctly. The engine MUST be running, warmed up, and the transmission must be in Park while you're checking its ATF level with its dipstick. Checking an automatic's ATF level without the engine running guarantees the dipstick will erroneously show an ATF level that is significantly higher than it really is. Check your ATF level again while the engine is running after it has warmed up. It's better for an automatic transmission to be slightly overfilled than slightly underfilled.
I really appreciate all the help! How long would you recommend running it before checking
I would run it through all the gears while it s warming up also…. Will make sure all valve body passages, valves in valve body, torque, etc have oil in them.
Then as stated once fully warmed up check with vehicle idling in park or whatever manual defines. (Oftentimes the A/T dipstick itself will have the proper steps on it for checking fluid level. )
Then as stated once fully warmed up check with vehicle idling in park or whatever manual defines. (Oftentimes the A/T dipstick itself will have the proper steps on it for checking fluid level. )
Just ran it through all the gears let it warm up checked and it showed up no fluid added a qt let it run went through all the gears and checked it again I can see fluid on the dipstick up to the hot point but when I wipe the dipstick there is hardly any fluid
Not understanding your 'but when I wipe the dipstick there is hardly any fluid' comment. Wipe the dipstick, run it down all the way into the dipstick tube, pull it out and see where it stops on the dipstick. Should be at the top at the top 'HOT' hole.
ChasUGC
TJ Enthusiast
If you ran it and it showed no fluid, I would have immediately put in two quarts before checking it again. If my tranny fluid is low, it starts slipping a little when cold. You don't want to damage your tranny. I always make sure my fluids are slightly overfull in case I have any leakage, and in case I don't check them too often. I agree with Jerry on that point. Probably most points in fact. 
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