When I select gear in my automatic it stays in 1 gear does not change through gears revs high, hard sometimes to get reverse and park, get park and reverse when engine is switched of and depress footbrake
On most cars, you need to change the neutral safety switch. this car has a neutral parking position sensor, you can find it for v6 not v8, it also fits a saab 9-3. it is the same thing, a different style. however, check the transmission fluid level and troublecodes for p07xxs. reset the code and use the transmission dipstick by dorman add lucas auto trans fluid, not stop slip to the fill line. most of the time it's not the solenoid, but the auto trans plate, overfilling the fluid can cause it to trigger a check engine light, and the fluid leaking onto it can cause it to be permanently damaged, it's more than $400 for the part. lucas works in the 722.xx transmissions, most , all, clks 99-2002, just make sure the tranny model isn't a 238. i like it better than atf 134. However, these parts are very heat sensitive. fill the trans fluid, reset the troublecodes, do a general motos drive cycle from obdii.com if it doesn't drive good after four times, change the neutral safety switch. :)
SOURCE: ML320 automatic is movig but not changing gears?
Yes it is possible since with the ml suvs and some of the c class of the same time frame, there is a few pcbs one horizontal and one vertical under the gearshit bezel, they ,I guess, communicate to the solenoid to pulse and actuate through the gears up and down through the gear shift range, possibly some moisture got into the shifter, a drink spilled or however, try spraying some contact cleaner or maf cleaner and hit it with a hair dryer on low heat, in a panic these can save your behind, just dont do any of these type of repairs with your battery connected....
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