I used to assume 90 gear oil was the correct oil for the old 4 and 5 speed synchronized truck transmissions. Then when I did business with a serious repair place, I was told that was too heavy for any transmission. 50 weight engine oil. But a chart shows those two oils as being about the same! When I bought my truck with a Spicer 7 speed, I drained out some light, reddish, very clean oil. Darn! I wished I had left it alone. I'm sure it was synthetic. Anyhow, maybe a transmission is like an engine, more damage is done in the cold, with heavy oil, than running on a hot day with light oil? Consider what's lubricating the back end of a big, newer, powerful farm tractor, pulling hard, in the heat, for hours.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
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