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4L80e temptures Alfred Cassell 8-17-09  
I have a 1992 30' class a motorhome, with a 4L80e trans in it. I put a trans temp gage in the line going to the cooler. and when I tow my jeep up hills, the trans temp gage goes past 260 degrease. Is it normal for the 4L80e trans to get this high of a tempeture when pulling hard up grades?
Thanks funnnyfarm
Re: 4L80e temptures BUBBA THE BUS TECH 8-18-09  
Ahhh the "normal" oils start to break down at about 260-300 F. Synthetics can run hotter. Manually down shift it and run a gear lower under less load once it heats up. Whether its a 4L80 or not those are the facts. One thing I have seen is that the aftermarket temp guages can be in the cooler lines. Both give inacurate readings. On line has the absolutely hotest oil coming from the tourque converter and the other runs cool oil to the Transmission. The guage sender in the pan is more accurate. This temp would be prtty normal for a guage mounted on the cooler hot line. Good Luck
Re: 4L80e temptures Alfred Cassell 8-19-09  
Thanks A lot BUBBA THE BUS TECH for the help I was beginning ot think that nobody knew. I will put the sender in the pan, Al Cassell
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