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I am having problems with my speedometer and am hoping that someone can offer possilbe solutions. The speedometer in my '98 FL70 (Cat 3126 w/Eaton 6 speed)works fine most of the time. About 20% of the time it will be showing half the actual speed. If I am driving 60 mph, it will drop down the...

As winter is coming down on us, its time for the states to start dumping the chlorides and urea-based chemicals on the road again. As was pointed out in this December issue of Land Line magazine, it is a good idea for us to power wash the underside of the trucks at least once a week. You will...

My mechanic is having problems finding parts for the AC in the sleeper of my FL70. The sleeper was manufactured by Kidron (1998). I have a leak as a result of two different metals being used at a connection just above the battery box, going into the sleeper. (Note, there were a lot of...

Weave: My Eaton 6 speed/Cat 3126 has a high pitch whine as I am going up through the gears. It is intermittant. The whine is not there when downshifting. It is not there when I first go into the gear, but shows up as the RPM's increase. It usually occurs at about 1800+ RPM's. Drive Safe

I have slowly been loosing the coolant in my A/C and went to get it recharged. However, the shop was unable to add refrigerant to the A/C because of corrosion on the fitting. They tried cleaning it, but were unable to get a good seal. Cost me $75.00 in Chicago and they couldn't do anything and...

This week I picked up a 2003 Chevy 3500 extended van with V8 for personal use (hunting, fishing and a little work). After one day in the hot sun and I realized I need to get that thing insulated immediately. I understand that there are kits available for paneling & insulating the walls and...

When I came on the site today (after 5 days of fishing), I noticed several postings regarding electrical problems. I have had my truck services by Bill & Dave at Ecorse Electic (On Ecorse Rd., west of Middlebelt) near Detroit Metro Airport. They have handled a variety of electical problems I...

This is for readers to add to their files for further reference. On my Cat 3126, just below the turbo charger is a small cup size metal container, which contains the waste gate for the turbo. One of the functions of this valve is to relieve the pressure in the turbo, so as to keep seals from...

This topic has come up in the past in conjunction with other discussions. However, I believe that it deserves undivided attention. As Spring is arriving, it is time for drivers to start crawling around under their trucks to assess the damage caused by the "brine" mixtures that various states...

I am planning to start having my oil analyzed. The Cat3126 has 400,000+ miles on it and I want to know what parts are wearing. My understanding is that by comparing results, you can look at metal contents in the oil and see if specific parts (bearings, cams, pistons, etc) are beginning to...

The turn signal lights on my 1998 FL70 have different light sockets for the front and back. The lights in the rear take an 1157 bulb - with offset node for the socket. However, the socket for the front does not take the offset bulbs, but rather has two nodes set parallel near the base of the...

Congradulations and I know I am looking forward to learning a great deal from this site. My question is - What are people doing to protect their trucks from "rust jacking?" Are there specific area's that those of us with D Units should be watching? (For people that do not know - rust jacking...

Would it be possilbe to have a Forum of only mechanical (truck) related information? Over the past many months people such as Weave have provided really great information about trucks and their internal parts. If we could have a site that a person could go to and just click on a topic to get...

The infamous Cat 3126 is the same engine as the 250 hp Cat. engine that is often mentioned in the advertisements, right?

While doing some work on my FL 70 today I discovered a hole about half the size of my small finger on one of the hoses for the turbo charger. The hose was rubbing on one of the braided steel hoses coming off of the compressor. You can only find the hole by running your hand along the back side...

I have used Napa soap to clean my windshield & mirrors and then applied rain X. Does anyone else have suggestions for keeping the mirrors from collecting water, making it hard to see. During todays rain (Detroit) I had a tough time seeing cars that did not have their lights on. (There ought...

When we purchased our used 1998 FL70 we needed a flashlight to read the gauges at night. I removed the 4 screws and pulled out the center console. On the back are 1/2" black plastic twistin holders. Pulled out and replaced the 194 miniture bulbs. It was easy to figure out why all six of the...

Do the DC inverters work to run microwave, TV and refrigerators? When I am parked, I have access to shore power and my 2500 watt generator. However, when running down the highway I would like to be able to keep the refrigerator running. Also, when in a truck stop or rest area, can I depend on...

On my Suburban I have a remote starter which can be programed to start the engine every few hours. That way, when the truck is parked outside, the engine will be frequently started and makes it much more likely to start when I return. The JC Whitney catalog shows remote starters for diesels...

We are searching for options for providing heat to our sleeper without having to operate the engine or spend $7,000+ on a generator. One of the heaters we have been told about is a Hebasto Air Top 2000 - Air Heater. This diesel fueled unit is installed in one of the luggage compartments. It...