how to test solenoids
 

I was wondering how to test the transmission solenoids for a 99 xj. I dropped the pan and got them out i just need to see if any of the three are bad. I would replace all of them but they run about $170 a piece. If anyone can help i would appreciate it

Have seen web pages ( you tube ) where folks made up there own test/cleaning system or...

http://www.ebay.com/itm/42RE-44RE-TR...sories&vxp=mtr

Were you having transmission symptoms?
You can check the coil resistance- 11-13 ohms and make sure they don't feel notchy or sticky when operated by hand. Other than that, the things tend to fail when they heat up, so bench checks are of limited value unless they clearly test bad.

First gear doesn't shift into second gear until 4000 rpm, and i can't shift manually out of first

If it shifts at all, the solenoids are working. Shifting late at high RPM is a control issue. Either the TPS (first choice), NSS or TCU is likely taking an extended lunch break.

Not shifting from 1 to 2 until 3500-4K RPM while in manual control is normal. You have 1 & 3 available in manual.

Just replaced the tps a month ago when i replaced the iac valve. It doesn't feel like the manual shift is doing anything at all but i could be wrong

Honestly I kinda had this problem replaced the tps like 6 times nothing even the computer nothing... Ended being a bad transmission.. got it replaced it had bad soleniodes in it replaced them.. and all is well now.. I would smell the trans fluid to see if it has a burnt smell to it.. of so its prolly the trans going bad... IMO you should replace the soleniodes..

do you have a check engine light on also? I ask because my 98 was having issues from 1-2, as well as the CEL was on. Replaced all three solenoids and the problem is definately gone. Follow this link and you will see why i did all three! The price is just too good not to do all of them.

http://www.bulkpart.com/Merchant2/me...e=A340solenoid
http://www.transmissionpartsusa.com/...-0094393aa.htm
I got interested and looked up another one for ya!

My good deed for the day is saving you a ton of money, now I can be an A$$ the rest of the day! haha J/K

http://www.jeepforum.com/forum/f11/a...no-56k-717206/
this is a write up on another forum, just in case you wanted it.

Good **** brother i appreciate it. Now its the first solenoid kit for $224? I think that was the one for a 99. Either way i was gonna be paying $170 a piece at napa, and $230 a piece at the jeep dealership! I can't believe something so small and cheap can cost so much!

And yes my check engine light is on, but i know for a fact at the moment that its on for a downstream o2 sensor, could be tranny too.

Quick and dirty testing?

- Resistance check with an ohmmeter - values should be published. This tests for shorts or opens in the coil.

- Once you've verified resistance, you can apply +12VDC to trigger the solenoid - you should feel a definite "click" when you do so. Be sure your test supply can give you at least +12VDC@2A (most solenoids used work around 1A, but no sense in pushing it.)

If there are two terminals, they're generally not polarisied - but it won't hurt to be sure.

If there is one terminal, that's usually the voltage feed - the ground will be through the case/screw tab that mounts it.