Posted by NCWayne on December 27, 2008 at 06:28:04 from (166.82.169.10):
In Reply to: Re: Hey T-Bone posted by T_Bone on December 27, 2008 at 05:21:32:
Hey T-Bone just wanted to throw in a few cents about the Allisons. Dad runs a "97 C6500 under his service bed. It"s equipped with a 3116 CAT and the AT545 Allison. Being a service truck he hauls around somewhere in the neighborhood of 19,000 to 20,000 lbs full time. He had some problems with it around the two to three year mark but the reman has been going strong since. My Freightliner runs the MD3060P Allison "World" transmission. It"s 4 speed to direct with 5th and 6th both being overdrive. It hauled a 30" box in it"s former life to nearly 400,000 miles and since being loaded with my service body now hauls around close to 30,000 lb full time. It ran fine until giving up the ghost around the 450,000 mile mark due to a leaking cooler filling it with glycol that caused the clutch facings to debond. Even then I got an extra year out of it after replacing the cooler.
The lifeblood of our transmissions is the LE oil we use. We had run both trucks for awhile before changing over to the LE so we pretty much knew how they ran temp wise. With the higher grade oil both ran much cooler than with the "regular" transmission oil. Dad"s cooled to the point that even in a long pull up a steep mountain grade, in the middle of the summer, it wouldn"t make it past the middle of the "green" where before it had run to the high end of the green on the same pull with the other oil. On mine the oil is the only cause anyone could come up with as to why mine ran an extra year after the failed cooler. Everyone I talked to said that when the cooler failed the transimission was already wasted. Still I got another year and close to 15,000 miles out of it that no one could explain beyond good oil. Basically what I"m saying is if you run an Allison give the LE oil a look, it"s well worth the little bit of extra cost.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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