Stuck solenoids?

[Unclewolverine]

My salvage title 96 rhd is not working out, (frame is bent,) so I'm trying to locate a new mail rig. A lady that has a 95 is offering me a good deal on one, but in her words, "you have to shift with your hand every time you stop," whatever that means. It's close enough for me to go get, but not so close that I can invest the time to go down there just to check it out. Does that sound like a hardware or software problem? I have another transmission to put in, but a 95 tcu may be harder to come by.

 

[lawsoncl]

If it's shifting fine manually, the transmission is likely fine and it's an electrical issue. It sounds like either a blown fuse for the tcu, or bad solenoids. The fuse would be a dirt simple fix, solenoids a little messier but can be done without pulling the transmission. The tcu is very rarely the problem, and your 96 tcu should work with the 95 transmission anyway. (reference https://naxja.org/threads/everything-you-ever-wanted-to-know-about-the-aw4.1053970/)

 

[Bent]

A TPS can cause a non shifting issue as well.

 

[lawsoncl]

From the description, I'd guess it's starting in 4th gear with the shifter in (D) and they're pulling the shifter back to (1-2) to take off and then shifting up. Normally the #1 solenoid is powered to command 1st gear, but no power to the tcu or a bad solenoid will cause it to be in 4th gear instead. Pulling the fuse and shifting manually like this is one of the tests for the trans working mechanically.

If that 95 is otherwise clean and priced well, I would grab it. They might sell cheap if they think the transmission is shot. I think worst case it needs a $65 set of solenoids and an hour or so to drop the pan and replace them. Best case is a 25-cent fuse.

 

[Unclewolverine]

From the description, I'd guess it's starting in 4th gear with the shifter in (D) and they're pulling the shifter back to (1-2) to take off and then shifting up. Normally the #1 solenoid is powered to command 1st gear, but no power to the tcu or a bad solenoid will cause it to be in 4th gear instead. Pulling the fuse and shifting manually like this is one of the tests for the trans working mechanically.

If that 95 is otherwise clean and priced well, I would grab it. They might sell cheap if they think the transmission is shot. I think worst case it needs a $65 set of solenoids and an hour or so to drop the pan and replace them. Best case is a 25-cent fuse.

I thought I remembered a bad solenoid could cause this kind of scenario, thanks! I'll get them to send me more pics, but otherwise it seems like a good deal, they only want 1k and it looks straight with almost no rust. Rhds are averaging about 5 to 7k right now, with some crazy people listing them as high as 15!

 

[75SV1]

Also, think of the Speed sensor. The 95 should only have one. I'd do as Lawson says, pull the fuse or the connector to the Trans Computer. Just be warn, that you will be driving basically, in a manual mode. There will be no downshifting. You will need to brake or drift down to speed to downshift.

 

[lawsoncl]

If the output speed sensor fails, it will just never upshift out of 1st gear.

 

[Mack 1996 xj]

Im having this exact issue on my 96. Tps sensor did not fix it for me.

 

[MAY POP]

As said before often solenoids

Ron