Posted by Kaegi on Friday, August 25, 2006 at 2:00PM :
In Reply to: to qoute from Vetern Vehicles site.... posted by dave in Plano, TX on Friday, August 25, 2006 at 1:26PM :
although some good points are made. I have to say I believe the speeds in that quote are very conservative. you should not experience premature bearing wear unless you exceed 3200 rpms for sustained periods of time. 3200 rpms is where the film of oil on the bearings starts to get thinner on older engines. If you stay under that rpm your oil film will be fine. I drive 50 to 55 all day, long distances, freeway commuting, offraod driving etc. you are not going to be able to have peaceful quiet conversations with your passenger at 50 + but the truck can handle it if your assemblies are in proper working order. On my trucks I always balnce the rear driveline at a minimum. I run lockiing hubs on the front so front driveline never sees high speed. The enigine fans on WC and ealry PWs are very noisy too. the fan is a 6 blade with a small pulley resulting in very high fan rpms. Much of the noise is the fan. it is designed to provide maximum cooling at low speeds. car and modern truck fan pulleys run at mcuh lower rpms.
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