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#1
04-09-2010, 10:06 PM
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03 grand cherokee wont shift into last gear
When I get on the highway the transmission only goes up to 3rd gear. What can I do to fix it. When I'm in the city it still only goes up to 3rd gear.
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#2
04-10-2010, 11:57 PM
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Re: 03 grand cherokee wont shift into last gear
Dude, I would check the trans fluid. The word on the street is that Jeeps love nice clean fluids in the trans. so it is well worth it to do a flush too and completly change out the fluids. I like to go a bit crazy with changing fluids, you can't be too good to your ride. Thats all I can suggest Bro. DRIVE IT LIKE YOU STOLE IT!!!!!!!!
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#3
04-11-2010, 07:54 PM
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Re: 03 grand cherokee wont shift into last gear
nope thats not it.
 could it be the crank sensor?
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#4
04-12-2010, 07:56 AM
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Re: 03 grand cherokee wont shift into last gear
CPS? Possibly. It can cause shifting issues, usually between 2-3 in my experience.
__________________
Ours: 2020 Jeep Wrangler 2.0, 53k 2013 Toyota FJ Cruiser, 84k Kids: 2005 Honda CRV, 228k
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#5
04-12-2010, 11:39 AM
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Re: 03 grand cherokee wont shift into last gear
I think you mean the TPS. A bad CPS would result in no start or engine cut off problem, not a wonky shifting.
Do you not have a CEL on? Have you pulled any codes? Please note, this is not the Grand Cherokee forum. Our experience may be limited (mine certainly is).
__________________
Dad's taxi: '88 XJ - 190K and going strong. K&N, Ford Injectors, No other mods
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#6
04-12-2010, 08:23 PM
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Re: 03 grand cherokee wont shift into last gear
ok ill post in the right forum. sorry. however i dont have any codes. i noticed that the trans fluid is way over full. would that cause the problem too.
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#7
04-13-2010, 08:06 AM
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Re: 03 grand cherokee wont shift into last gear
Oops, I should have moved this before....moved now.
Over filling the trans can cause issues, but I'm not sure about the 3-4 shift.
__________________
Ours: 2020 Jeep Wrangler 2.0, 53k 2013 Toyota FJ Cruiser, 84k Kids: 2005 Honda CRV, 228k
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#8
04-14-2010, 08:26 PM
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Re: 03 grand cherokee wont shift into last gear
i fixed the problem. it was the throttle positioning sensor. when i put it on the multimeter it didnt test good at all. it was to read .1-.5 gradually as i actuated the throttle. it stayed open. so i replaced it and shu-bam! runs good again.praise God! and thanks to all who helped.
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