Recent content by Thunderbirds

If and when you are stuck in 1st or in "Low Lock" and it doesn't want to shift if could "feel" like slipping, but in fact you are only in limp mode and won't go any faster than 10mph. Make sure your High Lock, Low Lock range connecting linkage for the transfer case are aligned correctly and...

I would search for and download a copy of the 4L80E Transmission Troubleshooting Guide dated Jan 2008, the short the Terminal A and E under the left rear seat Data Link Connector to see if you have any transmission error codes. Then work through the troubleshooting guide from there. Good luck...

Welcome to the forum. I am a firm believer in the tire pressure outlined in the -10 owners' manual. I have a 10,300 lbs M1123 and am running 20 psi in all four, drop it down to 15--18 when off roading, all when no other load than the driver and passenger. Many folks here have a heart attack and...

So, at this point I have replaced my power steering pump, and the three EDIT: four low pressure hoses, as well as 2 of the 5 O-rings on the high pressure side. I have bled the system over 3 days, mornings and evenings 40-50 turns for a total of 6 or 7 sets, hold for 5 seconds at each stop. Kept...

. I've learned from others on this forum and had great success with just a tiny amount of Slime on the seal, just as a precaution. It fills in any unevenness or scratches if present. And I second DREDnot's opinion in his post. As long as you don't have to mess with the run flats, pretty simple...

. Very good point. Sorry to hear you lost a tire. I don't think it was solely because of the low pressure. It may have expedited, but according to the government ALL Goodyear Wrangler MT/R tires older than 5 years are considered to be unserviceable... If you have others, I would consider...

Bled the system one more time this morning, did not help. I have noticed there is just not enough boost/power to go around for brakes AND steering at idle. It gets better at higher rpm. Now I am trying to figure out is it more likely some o-rings in the power steering pump or hoses, the pump...

UPDATE: at least fixed the temperature indication. I inadvertently pulled the lead from the temp sending unit right next to the low pressure hose near the back of the pump. Also, now noticing a low level chirp when at idle, never hear that before. Definitely pulley, belt related, but sounds...

Hey all, We've been having some dreaded power steering woes, slowly building up to PS failure yesterday and some maintenance not helping thus far. Hardware: 1999 M1123, single pump/reservoir, serpentine belt. Dex III fluid level perfect at all times, fresh fluid (6 months). Cooling fan came...

Welcome to the forum. Yes, you are running a great chance of sucking foreign material into the crankcase. Slim, but catastrophic if/when it happens... The replacement is relative cheap for around $60, or $70 for the DWF style with extra port (to nowhere unless you reinstate the entire system)...

I found on my M1123 the throttle return spring at the end of the pull cable was stretched, replaced it and went from 1050 rpms to 700rpms at idle. That made a big difference, then fixed my Cadillac valve, thermostat and Time Delay Module. That gave me a huge bump... Went from 12 to 14.5. I know...

Saw this sticker a few times:

Other comments are: Not much space for the driver. They didn’t spend much on comfort, huh? How does it do on the trails? One that sometimes bother me a little bit: Is this a H1? :mad: Or they call it a Hummer. But I’m never put off enough to not talk with anyone about it. Edit: My M1123 4...

Keep in mind, the fan never really stops, just slows down some, not that much, when it' snot engaged. You notice when it engages at operating temperature that it becomes loud and more air is moved... You can't miss it when it engages. Don't assume it's not disengaged because it is still spinning...

Try to list your tasks I am sure most of these fine folks here have started where you are and succeeded. Download the TM from this site. 90% of all tasks can be done by a somewhat skilled mechanic with a decent toolbox. The manuals are written for highschool graduates to understand if you...