Transmission slow change - JeepForum.com
 
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post #1 of 7 Old 02-28-2020, 04:44 AM Thread Starter
Esorlegin
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Transmission slow change

Hi Guys.

Just bought another Jeep - Jeep Cherokee KJ 3.6L petrol auto, 2004. 92,000m

The seller has just (27.2.20) fitted a new throttle control sensor.

The engine management light is on and the gear changes are not as they should be (high revs [3000 before it changes] when pulling away).

Also, the overdrive is very, very slow to engage. 10+++ minutes!!!!

Does the computer need time to register the new sensor? Is the some trick to make the computer register the throttle sensor?

I have checked the transmission fluid - it does need topping up - but going to change filter, so will wait. Vehicle is not taxed, so not in use.

Thanks in advance for any help and advice.

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post #2 of 7 Old 02-28-2020, 07:05 AM
jtec
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ok the check engine light (third world - engine management light) is on SO there is a issue and step 1 would be to get codes and post them here.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #3 of 7 Old 02-28-2020, 10:40 AM Thread Starter
Esorlegin
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Just finished grouting kitchen - codes is my next task.

Thanks for responding.
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post #4 of 7 Old 02-28-2020, 10:53 AM
222Doc
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3.6? i dont think. think its a 3.7. Huge difference. First one is a dual over head cam, VVT. the latter is a push rod v6. Might be wrong but i am about sure the 3.6 come in down road much latter then 2004. more like 2010/11.

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post #5 of 7 Old 02-28-2020, 11:35 AM Thread Starter
Esorlegin
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My booboo - it's a 3.7 - typo.

Just tried the key 'trick' to get codes....... tried all the various possibilities - passenger door open, driver door open and both doors open - nothing. It will not show error codes.

My first Jeep a few years ago - no problem got the codes up straight away, second Jeep, same - now this one will not 'play ball' !!!
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post #6 of 7 Old 02-29-2020, 06:43 AM Thread Starter
Esorlegin
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OK - finally got the error codes: P0068 & P0137

The exhaust is blowing and may need replacing - this could (??) be causing the error codes and over-revving before gear shift? May also have to get a new Lambda sensor & Cat - will know once exhaust is sorted.

Not so clear on Throttle position - a new sensor has been fitted (by previous owner) - I will check fixings. "Possible Vacuum leak" - I have no idea what this might mean.

Any advice appreciated.
Thanks Guys
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post #7 of 7 Old 02-29-2020, 07:10 AM
jtec
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the p0068 is likely the issue with trans shifting. SO confirm MAP readings also,

GTG later

P0068 MAP Sensor/TP Sensor Correlation

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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