Rad-in-Cal
Member
My 2005 XLS is having transmission problems. There is major slipping going on in low gear and starting out. I changed the filter and that didn't improve the situation. Now the "O/D Off" light is flashing.
O/D Off light flashing
- Thread starter Rad-in-Cal
- Start date
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Ssimmons
Member
Is your check engine light on?
OP
OP
Rad-in-Cal
Member
No, and the O/D light flashes intermittently.
Ssimmons
Member
Are you sure it's slipping? I ask because i had the same problem with my motorhome and what it was doing was actually pulling off in second gear instead of first. Try pulling codes on it and see what you get. If the O/D light is flashing there is a code in the ecm. mine was showing a code P0720 and this was the fix for it
http://www.thedieselstop.com/faq/9497faq/tsb/tsb/files/021103.pdf
stamp11127
Full Access Members
If you can get the trans codes read that will give you an idea of what the trans trouble is. I would expect a trans rebuild/replacement if the mileage is high.
AbelNavyvet
Full Access Members
There is 2 sensors on the Tyranny's drivers side, this has happened to me before if I'm not mistaken its the Speed sensor (VSS)
AbelNavyvet
Full Access Members
IF its not the sensors its the converter. don't drive it if it makes your tranny over heat.
DarrinBC
Full Access Members
That's not good. What's going on is that the computer is seeing the output shaft turn at a speed that isn't correct for the commanded gear. Could be from excessive slippage, an electronic or sensor issue, or it could be from the transmission starting out in the wrong gear.
The 2 sensors on the side of the transmission are the TSS (turbine shaft sensor) in the front and the OSS (output shaft sensor) in the rear. The computer takes the input from those sensors and compares that to the engine speed and expected torque converter slippage to determine if everything is working properly.
Obviously in your case it is not working properly. So what you need to find out is if the engine rpms are too high or too low for the commanded gear. Both can feel like slippage unless you are very familiar with what you are dealing with.
Too high an rpm for the commanded gear is bad.
D
I would say too high an RPM -- the revs will spike when the trans attempts to shift, like a delayed shift or going into neutral, and there is little acceleration. The truck accelerates slowly. Once it shifts into 3rd, it seems fine.
I'm assuming the sensors are ok or I'd expect something like an out of range code. Should I expect any telltale signs if I drop the pan?
I'm assuming the sensors are ok or I'd expect something like an out of range code. Should I expect any telltale signs if I drop the pan?
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