Hello and welcome to JustAnswer!
Your Jeep's 45RFE trans is actually stuck in third gear. It does this when the control module has seen a problem that could cause potential damage. The first thing we need to do is get the codes from the trans controller. This may or may not work, but we'll try it. With the doors closed cycle the key from off to on (don't crank the engine) three times ending with it on and watch the digital odometer display. the codes start with a p and have four numbers, there may be more than one codes. Write down any that you see and post them here.
There's alot of possible problems it could be. Some of them cheap and some expensive. If we can get the codes I can tell you exactly what's wrong with it. We can try it again a couple times. Make sure you don't crank the engine, just go from off to on. Off is one notch forward of the locked position (where you can take the key out), and on is one notch forward of that. Make sure the doors are closed, go on, off, on, off, on and leave it.
Sometimes it just won't work. If it won't, almost all parts stores will check codes with a code reader now. If you could run by a parts store and have them check the codes and let me know what they are I'll be able to tell you what to do to fix it. It may be something that you can replace or repair yourself and save some money. I just don't want to tell you to replace something and have it not fix the problem, I'd hate to waste your money on a guess!
Absolutely. I'll come online about midmorning Eastern time and I'll be on all day. Whenever you get the codes just post them and I'll tell you what to do!
No, not really. What did they do, did they hook a code reader up to it? That's what they need to do. It hooks up to a connector under the dash on the drvier's side. It will give codes like P0700, P0720, etc. I think what they saw was "type 35" printed on the front of the instrument cluster down low. That is some sort of identifying code for the instrument cluster.
The "type 35" thing is there on every vehicle. Its just printed on the instrument cluster, and means nothing.
If they hooked up a code reader and couldn't get codes one of two things happened. If you disconnected the battery, the codes are gone now. If the engine light was still on, they either have a code reader that doesn't work, or they didn't know how to use it. If the engine light was on (or the battery wasn't disconnected) the codes are there.
The key has to be turned on to be able to do it. If the key was off they'll never have communication. I do think I'd find a different parts store if you have another one available to you.
You're not wasting my time! I'm not worried about it at all. Good luck out there!
I'm sorry, I read that wrong. If its not shifting there should be codes stored. For some reason noone can get them for you though. I wonder if you have a problem with the transmission controller or something like that. If the controller is dead it won't communicate with a scan tool or code reader, but there should still be communication codes stored in other modules. I'm thinking this one is going to need to be diagnosed with a full capability scan tool that will communicate with all the modules on your Jeep to get to the bottom of it.
Speed sensors are cheap, normally around $20-$30 apiece, and there are two of them. The solenoid pack is more expensive and harder to get to. Its a few hundred dollars by the time you get it installed, its mounted to the top of the valve body and takes a bit to get out. I wouldn't replace it unless I was sure it was bad though.