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mdarshi 04-25-2013 05:55 AM

Jeep Grand Cherokee 2001
 
Hi,

I have a Jeep Grand Cherokee 2001. It has automatic transmission. The problem is when i put it on Drive gear from Idle position it does not move immediately, it takes around 5 second and with a jerk it moves. but i dont have any problem with reverse gear.
Also when i slow down at the stopping point it takes a jertk (Thud).
I dont know what's the problem. i have recently change the tranmission fluid and filter.

Any Advise will be of great help.

Frango100 04-25-2013 06:31 PM

Re: Jeep Grand Cherokee 2001
 
Which engine/tranny combo does the jeep have?
Did the problem show up before the fluid/filter change?

Gus9890 04-25-2013 07:14 PM

Re: Jeep Grand Cherokee 2001
 
If the problem was there and changing the filter and fluid didn't help, then it may be a sensor issue. What engine/tranny combo ya got?

mdarshi 04-26-2013 05:05 AM

Re: Jeep Grand Cherokee 2001
 
It has 4.7 Ltr V8 Engine. is it a TPS issue?

Frango100 04-26-2013 06:21 AM

Re: Jeep Grand Cherokee 2001
 
So we are talking about the 5-45RFE transmission. Did the problem of putting in Drive and not moving happen after the fluid change?
The check engine light is not on? Just to be sure that there are no fault codes set, do the following: switch the ignition switch OFF/ON three times and leave it in ON at the third time. The odometer will show DONE when all ok, or a fault code, which could help in the trouble shooting.
There where cases where at first startup it took several seconds for the jeep to start moving. That had to do with a faulty checkvalve inside the round spin-on filter inside the transmission. The fluid from the torque converter could drain back to the sump and it would take some seconds after start-up to fill the torque converter. But you also have a problem when coming to a stop, so this seems to be a different problem.
New fluid has strong cleaning action and could remove particles from one position and take them to small orifices, where it can block (partly) the orifice.
Since you say that in reverse all works ok, my suspision is going to the solenoid assy or the electrical connector on top of it (reverse is using the manual valve in the valve body). Maybe you could start cleaning the big connector from this solenoid block, its positioned on the left side of the transmission, its a big square connector with many wires. There is a locking bar on it which you have to move up, so that it will push the connector upwards.
TPS and speed sensors are a possibility as well, but they generally cause shifting problems in all gears.
Another possibility is a sticking solenoid switch valve inside the valve body, but it will switch the check engine light on.

mdarshi 04-27-2013 03:27 AM

Re: Jeep Grand Cherokee 2001
 
Hi,

When i had changed the transmission fluid and filter that time mechanic had just changed the one filter not the round shape filter. i asked him if we need to change the round shape filter also but he said no need.
Please advise if this problem could be because of that round shape filter.

Frango100 04-27-2013 05:13 AM

Re: Jeep Grand Cherokee 2001
 
Its better to change both filters when you change the fluid. But if the problem was due to this filter, it normally only has the problem of delayed engagement at first start-up and not during driving. Its because of the drainback of the torque converter fluid to the sump, and the converter has to be full with fluid to be able to work. If the jeep moves right away in reverse after startup, then the drain-back issue is not your problem.
Did you try to put it instead in drive, in 2 or 1 position, to see if that makes any difference in the engagement?

mdarshi 04-27-2013 09:16 AM

Re: Jeep Grand Cherokee 2001
 
I haven't tried it putting on 1 or 2. I will check on that and let you know.


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