Transmission slip from stop
#1
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Year: 1995
Model: Cherokee (XJ)
Engine: AMC 4.0
Transmission slip from stop
Quick history. Was in the desert, coolant lines got severed, lost all fluid (didn't know it until issue presented), wound up having to tow car home. While loading it onto the trailer, car would rev up to 4-5k RPMs just to move.
Fast forward a couple months, I went ahead and replaced tranny filter/pan gasket and fixed the lines. I put it in a gallon of fluid and test drove it. It seemed all fine except when I would stop at a light/stop sign, the car would rev up higher than normal before the car would move. It's really intermittent but it's there. I did a fair amount of web searching for this issue but came up with only a few things that are somewhat related. Some said TPS sensor, some said brake sensor.
If anyone could direct me to a thread with this issue or maybe brainstorm a little, it'd be great. =)
Fast forward a couple months, I went ahead and replaced tranny filter/pan gasket and fixed the lines. I put it in a gallon of fluid and test drove it. It seemed all fine except when I would stop at a light/stop sign, the car would rev up higher than normal before the car would move. It's really intermittent but it's there. I did a fair amount of web searching for this issue but came up with only a few things that are somewhat related. Some said TPS sensor, some said brake sensor.
If anyone could direct me to a thread with this issue or maybe brainstorm a little, it'd be great. =)
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Year: 1984
Model: Cherokee
Engine: 4 cyl
sounds like a fluid issue. The reason it revved so high when loading is that the auto trans relies on hydraulic pressure that is rerouted throughout the transmission to move. Each time you change a gear / downshift, the fluid is rerouted and helps the vehicle move. When you dump fluid, it doesn't have enough to maintain a consistent pressure. Adding X amount of fluid doesn't mean its full. You have to know how much your trans takes (first), then add fluid per the factory recommendations (ie: add fluid, shift through all gears (while stopped), and do this a few times, then check fluid level while the vehicle is warm / up to operating temp. If low, add a little more at a time. overfill is worse than underfill, and you will need to drive it a little after getting as close as you can to the fill mark. After driving a little, making sure its fully warm, stop at a gas station on level ground, and check the fluid level again.
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#10
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Year: 1995
Model: Cherokee (XJ)
Engine: AMC 4.0
Service manual said 4qts. I'll double check the fluid. If anything is burned up I'm hoping it's only the torque converter but I'll check fluid again and see where it's at.
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Year: 1995
Model: Cherokee (XJ)
Engine: AMC 4.0
Well it turns out that it was indeed low on fluid. I misread my Haynes manual. It did say 4qts capacity but in parenthesis it said that was only if it was just a filter/gasket replacement.
It was low by 2.5qts. Slippage seems to be gone.
It was low by 2.5qts. Slippage seems to be gone.