Howo Truck Gear Shifting --10 Speed Gearbox Shifting. — Transcript

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1. 0:00[Music]
2. 0:05a 10-speed transmission is just a
3. 0:075-speed on top of another 5-speed if
4. 0:09you've driven a manual transmission
5. 0:11before you're probably familiar with the
6. 0:13m pattern associated with shifting
7. 0:15through the gears on the front of the
8. 0:17shift handle is the range selector or
9. 0:20splitter which is used to select the low
10. 0:22range gears in the down position and the
11. 0:24high range gears in the up position
12. 0:26the low range gears are first through
13. 0:28fifth and low reverse
14. 0:30and the high range gears are sixth
15. 0:32through tenth and high reverse
16. 0:34the splitter talks to the transmission
17. 0:36in neutral which means pushing the
18. 0:38splitter up or down while you're in gear
19. 0:40doesn't change the gear you're in so if
20. 0:42you put the truck in third gear with the
21. 0:44splitter down and then flip the splitter
22. 0:46up you're still in third gear
23. 0:49with the splitter up in third if you
24. 0:50push the shifter to neutral and then
25. 0:52back to third you're now in eighth gear
26. 0:55the splitter only talks to the
27. 0:57transmission when the shifter is in
28. 0:59neutral we'll talk more about this in a
29. 1:01few minutes when we cover shifting from
30. 1:02fifth gear to sixth gear
31. 1:05let's take a look at the width of the
32. 1:06shift pattern
33. 1:08you may assume that it's wider than it
34. 1:10is because the vehicle is so large but
35. 1:12as you can see here this is neutral and
36. 1:14from the right side to the left side is
37. 1:16about seven inches
38. 1:18the point at which the shifter stops is
39. 1:20called a hard wall there's a right hard
40. 1:22wall and a left hard wall
41. 1:24the right hard wall gives you access to
42. 1:26fourth and fifth when the splitter is
43. 1:27down and ninth and tenth when the
44. 1:29splitter is up
45. 1:31the left hard wall gives you access to
46. 1:32low reverse and first when the splitter
47. 1:35is down and high reverse and sixth when
48. 1:37the splitter is up
49. 1:40you can also locate the soft wall which
50. 1:42is in the middle
51. 1:43as you can see from the right hard wall
52. 1:45it's as easy as pushing the shifter to
53. 1:47the left with a finger
54. 1:55if i want to pull the shifter to the
55. 1:57left hard wall i have to use a little
56. 1:59force because i'm overcoming a spring
57. 2:01that sits between the middle soft wall
58. 2:03and the left hard wall
59. 2:05if i ease off the pressure the spring
60. 2:07pushes the shifter back to the soft wall
61. 2:10by the way it's called a soft wall
62. 2:11because we can push through it
63. 2:13finding the soft wall allows you to
64. 2:15access second and third when the
65. 2:17splitter is down and seventh and eighth
66. 2:19when the splitter is up
67. 2:20if you can't find the soft wall when
68. 2:22you're shifting on the road it's
69. 2:24probably because you're nervous
70. 2:25nervousness causes some students to grip
71. 2:27the shifter too tightly and muscling the
72. 2:29shifter makes it difficult to feel the
73. 2:31spring and locate the soft wall these
74. 2:34big trucks require very little arm
75. 2:36strength to shift
76. 2:37you'll expend more energy pushing the
77. 2:39stiff clutch pedal
78. 2:45students are required to double clutch
79. 2:47every shift which means the clutch has
80. 2:49to be pushed twice every time you shift
81. 2:51in a semi tractor you need to push the
82. 2:53clutch and move the shifter at the same
83. 2:56time this takes some coordination but
84. 2:58you can practice anywhere try this
85. 3:00exercise in a chair
86. 3:02push an imaginary clutch pedal with your
87. 3:03left foot and move your right hand at
88. 3:06the same time one two
89. 3:08one two
90. 3:09one two this exercise will develop your
91. 3:12hand foot coordination and you'll build
92. 3:14a little muscle memory from the
93. 3:15repetition
94. 3:16that one two speed is recommended for
95. 3:19every up shift when double clutching
96. 3:21you'll want to push the clutch in just
97. 3:23two to three inches when you depress the
98. 3:25clutch pedal you should also move the
99. 3:27shifter to neutral at the same time with
100. 3:29the second clutch you'll move the
101. 3:31shifter to gear clutch to neutral clutch
102. 3:33to gear one two clutch clutch push the
103. 3:37clutch pedal and move the shifter at the
104. 3:39same time one two two short clutches two
105. 3:42to three inches you also have to
106. 3:44remember which gear you're in and the
107. 3:46location of your next gear in the shift
108. 3:48pattern
109. 3:50use the walls to find your gears and
110. 3:51it'll become second nature always
111. 3:53remember that when you push the clutch
112. 3:55pedal you have to release the gas pedal
113. 3:57the opposite is also true when you push
114. 3:59the gas pedal release the clutch pedal
115. 4:02these two pedals must be operated
116. 4:04independently of each other avoid
117. 4:06pushing both of these pedals in at the
118. 4:07same time
119. 4:13the only time we push the clutch pedal
120. 4:15to the floor is when the vehicle is
121. 4:17stopped here's why when the vehicle is
122. 4:19stationary the gears on the transmission
123. 4:21are turning to put a stationary truck in
124. 4:24gear we need to stop those turning gears
125. 4:27for a stopped truck you must stop the
126. 4:29gears you can stop the gears by pushing
127. 4:31the clutch pedal all the way to the
128. 4:33floor when you push the clutch pedal to
129. 4:35the floor you engage the clutch brake
130. 4:37which stops the gears from turning and
131. 4:39allows you to put the truck in gear by
132. 4:41the way if the vehicle is stopped and
133. 4:43you're having trouble putting the truck
134. 4:44into gear after fully depressing the
135. 4:46clutch pedal release the pedal just a
136. 4:48hair
137. 4:49it's just the opposite when the truck is
138. 4:50moving if the vehicle is in motion the
139. 4:53gears have to be turning a moving
140. 4:55vehicle requires moving or spinning
141. 4:58gears the gears will continue spinning
142. 5:00if you avoid pushing the clutch pedal to
143. 5:02the floor this is why we only push the
144. 5:04clutch pedal in two to three inches when
145. 5:06we're shifting
146. 5:07keep the clutch pedal away from the
147. 5:09floor when the truck is moving if you
148. 5:11find yourself fully depressing the
149. 5:12clutch you're probably nervous try
150. 5:15pulling over and practicing two short
151. 5:17clutches two to three inches deep at the
152. 5:19one two speed do it 20 to 30 times and
153. 5:23hit the road again
154. 5:30consider using a side grip when you
155. 5:32shift because there are some advantages
156. 5:34to gripping the shifter from the side
157. 5:36first of all it's easy to manipulate the
158. 5:38splitter when it's always between your
159. 5:39second and third fingers and you have
160. 5:41your thumb on top of the shifter for
161. 5:43leverage but here's a better reason
162. 5:45shifting from sixth to seventh new
163. 5:48students sometimes accidentally shift to
164. 5:50ninth when they're trying to hit seven
165. 5:52here's one way to fix that in sixth gear
166. 5:55use the bottom part of your hand to push
167. 5:57the shifter to neutral then allow the
168. 5:59spring to push the shifter to the middle
169. 6:01soft wall then push straight forward to
170. 6:03seventh when the spring pushes the
171. 6:05shifter to the middle you'll feel it in
172. 6:07the palm of your hand with a side grip
173. 6:09practice this a few times in a
174. 6:11stationary truck with the engine idling
175. 6:13and the clutch fully depressed
176. 6:18here's another way to use the walls
177. 6:20shifting from five to six is the longest
178. 6:23shift because you're shifting from one
179. 6:24hard wall to the other here's an
180. 6:26efficient way to make sixth gear since
181. 6:28you're required to double clutch why not
182. 6:30take care of most of the shift with the
183. 6:32first clutch here's what i mean when you
184. 6:35clutch to neutral pull the shifter all
185. 6:37the way over to the left hard wall then
186. 6:38clutch again and pull straight down to
187. 6:40sixth
188. 6:41grab a truck that isn't rolling and
189. 6:43practice this a few times
190. 6:45be sure to pre-select sixth gear when
191. 6:47you're in fifth by pushing the splitter
192. 6:49up the splitter talks to the
193. 6:50transmission when you shift to neutral
194. 6:52so if you're in fifth gear and push the
195. 6:54splitter up you're still in fifth gear
196. 6:57when you shift to neutral the splitter
197. 6:58notifies the transmission that you want
198. 7:00the higher gears and the transmission
199. 7:02then makes those gears available if you
200. 7:04shift to neutral and then pull the
201. 7:06splitter up it may be awkward and
202. 7:08prolong your shift
203. 7:09better to get it out of the way while
204. 7:11you're in fifth so that you can
205. 7:12concentrate on the long shift to sixth
206. 7:14one last item about the splitter if you
207. 7:17come to a stop and forget to push the
208. 7:18splitter down before shifting to your
209. 7:20start gear the truck will likely stall
210. 7:22when you try to pull forward try to
211. 7:24remember split her down whenever you
212. 7:26come to a stop