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<blockquote data-quote="Brown Now" data-source="post: 2057294" data-attributes="member: 45719"><p>You're going to have to learn how each truck revs. Slow or fast. For an example, the Macks with the MP-7 engines( 271xxx-272xxx) rev quickly but also drop their revs quickly. The Macks with the MP-8 engines (273xxx-278xxx) rev slowly but will also drop their rpms slowly. This will tell you how quick or slow you have to make the down shift. </p><p></p><p></p><p>If you drop down to just say 1000 rpm, you blip the throttle to roughly 1400-1500 rpm and drop down a gear. It should go in at roughly the same pattern for each subsequent gear down. If it's a quick revving engine, that usually means the rpms drop quickly too so you have to down shift rather quickly. Slow revving, you've got a little more time to get it done as the rpms take their time to drop down. It's all in the timing. </p><p></p><p>You will with time become harmonious with whatever tractor you're driving that day. It'll come to you and besides, manuals are now living on borrowed time to UPS. Every new diesel tractor will now come equipped with an automatic transmission. Not sure about the CNG/LNG tractors. </p><p></p><p>I've been driving a" big truck" for 25 plus years. Doesn't matter what I'm driving, its second nature. You will get there too before you realize it. Be patient and don't put too much pressure on yourself. You'll get there. Good luck to you and all the guys and gals going thru feeder school.</p></blockquote><p></p>
[QUOTE="Brown Now, post: 2057294, member: 45719"] You're going to have to learn how each truck revs. Slow or fast. For an example, the Macks with the MP-7 engines( 271xxx-272xxx) rev quickly but also drop their revs quickly. The Macks with the MP-8 engines (273xxx-278xxx) rev slowly but will also drop their rpms slowly. This will tell you how quick or slow you have to make the down shift. If you drop down to just say 1000 rpm, you blip the throttle to roughly 1400-1500 rpm and drop down a gear. It should go in at roughly the same pattern for each subsequent gear down. If it's a quick revving engine, that usually means the rpms drop quickly too so you have to down shift rather quickly. Slow revving, you've got a little more time to get it done as the rpms take their time to drop down. It's all in the timing. You will with time become harmonious with whatever tractor you're driving that day. It'll come to you and besides, manuals are now living on borrowed time to UPS. Every new diesel tractor will now come equipped with an automatic transmission. Not sure about the CNG/LNG tractors. I've been driving a" big truck" for 25 plus years. Doesn't matter what I'm driving, its second nature. You will get there too before you realize it. Be patient and don't put too much pressure on yourself. You'll get there. Good luck to you and all the guys and gals going thru feeder school. [/QUOTE]
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