A few months ago my transmission started to flare in between the 1-2 & 2-3 shifts.
In the past few days it started to do the same thing on the 3-4 shift but now a flare with a bump.
Fluid has been drained and filled every 20k miles.
Tune has not been changed or modified.
Has anyone experienced this? VSS and/or OSS problem?
Logfile and picture attached with part throttle driving.
TSS/OSS is definitely a viable suspect, especially if the flares are harsh. But to be sure, I would send a fluid sample off to Blackstone labs for analysis. If that turns out fine, then I would think about replacing these and possibly the valve body (at least cleaning it out).
I have found that the MAF sensor on my Edge can also contribute to the problem because it feeds into TCM shift logic. I tried cleaning time after time, did not help. Putting in a new one made a big difference. So maybe you can try cleaning/replacing the MAP sensors. Also check the throttle body, because the motor sometimes fails.
Other than that, there are TSBs for bumps/harsh shifts that you may want to look through, but since the problem seems to be progressing, I am definitely thinking TSS/OSS.
Update:
Trans shop wants to replace valve body for $1200 or total rebuild for $3700.
I think I will try to replace the OSS and VSS for under $100. :) :)
Has anyone on this forum done this or the valve body for the 6f55/6F50?
It is a time-consuming, but a very DIY-able process if you are patient & methodical. First timers will usually take 7-8 hours to do it, tho the work can be done by a pro in 4-5.
Cant find directions to replace the valve body. Where can I find this?
I might as well do the VSS, OSS, and valve body while I am in there.
Ordered a Blackstone kit to see what shape it is in prior to this.
I will post the fsm directions this evening, out of pocket right now.
Here ya go
Looks fairly easy.
I think I will change the sensors and if this does not work try the Sonnax kit.
Thanks again. :)
:thumb:
Just dropped gears 4+
Curious if my valve body could be the issue of the trans is toast.
-MANU is the Man. Z :thumb:
ZSHO,
Not sure what this meant: -MANU is the Man. Z
Please explain. :)
Quote from: Gray Brick on April 02, 2017, 01:50:50 PM
ZSHO,
Not sure what this meant: -MANU is the Man. Z
Please explain. :)
:bigthanx::to SHOdded for the FSM. Z
Sorry just hate typing from my phone. Lol
We are shooting in the dark right now, but it could very well be the TSS/OSS sensors AND or the valve body. Does the fluid still look good? If so, then I would proceed apace with the sensor replacement & valve body cleaning.
I remember from previous posts that you have had issues with the trans running at higher temps than expected. Is this issue still current? I don't know how you would test the cooler in place, but that might be worth a look also. could be defective or clogged.