DCWinterXJ

I only ask this question because I have actually dealt with it before. And my answer is yes....but only my experience happened with a ford e150 econovan. It was shifting terrible,,,the more you rev the engine the less of a chance you had of getting it into gear. It was my dad's van, and I told him one of the motor mounts was bad...and he did not get it replaced right away. then my bro was driving and revved it so high he smashed the water pump and screwed up the fan. I was like why are you such an idiot. Anyway We finally got the van to our mechanic who should have done the mount the last time he had the van...but he did it this time. WOW! A whole new van after that...shifted like a dream. Amazing. All from a toasted motor mount. Google does not put much emphasis on this...but I experienced it first hand. Now I have a ZJ...95 Laredo...with similar transmission slippage and totally smoked motor mounts. I did the engine jump test. Hold the brake, put it in gear, check for engine shifting...holy crap...the engine practically left the jeep! I know the 42re and hre are crappy but I think it is the engine mounts. I am getting them replaced wednesday. If that saves it, it will be a revelation. I worked on so many transmissions tests with my xj but it had brand new motor mounts....that ended up being the tps....Then it shifted perfect. Anyway just wondering if any of you saved a jeep transmission problem with new engine mounts....cause that would really be awesome to know.....thanks in advance!

DCWinterXJ

I have a feeling no one has experienced this issue. I will let it float for a while but I do know I have dealt with it before. I will let you all know after I get the mounts installed....

cruiser54

On an XJ? Not likely. There is no real rigid linkage to bind, stick etc.

DCWinterXJ

Well actually I was talking about the 42re on my zj...the aw4 trans on my xj is bulletproof.

DCWinterXJ

Thanks cruiser54 for moving me to the place where I get no advice...woo hoo I know it was you

cruiser54

But you were getting bad advice from me thinking it was an XJ based on the forum it was in.

Either way, non-rigid shift linkage like a cable wouldn't be as prone to influence of bad mounts on a Ford with rigid linkage.

.

DCWinterXJ

Wrong about the advice...you just didn't read my full post. But thanks for cleaning that s%$t up.

DCWinterXJ

So the motor mounts and the transmission mount were trash...All replaced. And cruiser54 was right as usual. Trans still slips but the engine is much better,,,no vibrations seems solid. Transmission work shall continue. It is such a rust free truck and I Like the layout I wanna keep her. I ordered another Tps and am gonna probe the wires. Trans fluid is 100% I really think there is a corrupt connection somewhere in there. I will do every test before i think about a new trans,,well salvaged....

Noah911

It's looking good!

DCWinterXJ

So I figured it out!!! It is done. She shifts perfect from first to second to third to awesome. It was one of my many tests I decided to go back to. Turns out it was the TVC cable the whole time. (Throttle Valve Control Cable) I did try to set it a couple times previously but decided to watch another youtube video and noticed mine was still way in. And the reset technique was not working(this was the key) So I manually pushed the button down and pulled the cable full forward. Instantly changed the entire shifting situation. She even locks in Park much better. The change was night and day. Shifts from 1st 2nd without me revving and droppping down..and no neutral slips either. It is a fully functional vehicle again!!! I am freakin out. Even my mechanic thought the trans was toast(but he does not work on old jeeps...so he gets a pass) With the new motor mounts she is kicking butt. Finally I got at least one Jeep running. Oye. Also replaced the intermiitent wiper control module and now the wipers rock,(completely unrelated) I guess the lesson here is do not give up on your transmission....until you do every test 2 or 3 times////this was the 3rd time I checked the cable and it was the winner! So happy right now you have no idea!!!!

Noah911

That is soo cool!

I just read about this somewhere yesterday.. The TV cable how to re-set it, when I was researching on something else. It sounds like it could be a good thing for anyone to do, with having any current problems or not...

A little copy and paste on the Throttle Valve Cable (TV):

A mechanical cable that runs from the transmission to the throttle linkage. This throttle valve cable is responsible for controlling the throttle lever providing movement to the car. The throttle valve cable is used to control the line pressure, downshifting and the feel of the shifting. When the throttle valve cable is out of specification, the transmission can shift early, shift late or not shift at all.

Warning: Improperly adjusting the throttle valve cable can cause extensive damage to the transmission.

Thanks for sharing your results!

DCWinterXJ

Amazingly I am very familiar with adjusting them...my XJ especially. The issue with the cable on the Grand Cherokee ZJ is that it would not reset itself. I had to do it manually. Push down the button and pull the cable forward. That is not something I have seen in any video. But It was the key to fixing mine. It was off by a huge amount!

Noah911

I read about it.. and say to myself, "what button are they talking about that needs pushed"?

I have not seen any picture illustrations, or gone looking for this button on my Jeeps. I have been underneath the hood of the Jeeps enough lately. I am not wanting to be working on them right now anymore.. But, I probably will soon? I cannot seem to stay out of them. I want to use a power drill and some wire wheels to remove rust from different things on my Jeep, and then galvanize with epoxy-paint afterwards.

What is the button you push to do this to the TV cable?

DCWinterXJ

Well I am very surprised you have not seen it. Anyway it is the third cable away from the throttle body towards the front of the engine, if you do not have cruise control it is the second cable. No crawling required. Lemme check for a pic.

Noah911

Yes, now I remember seeing it. I never pushed the button before though. The cables all three of them disconnected and reconnected again okay for me. I wonder if it would make a difference to do this on mine?