13 speed shift pattern7/25/2023 ![]() There was a old 4x4 transmission that you shift 1,2,3,4move button on shifter to 2nd position,1,2,3,4 again,move button to third position1,2,3,4,move button to 4th position1,2,3,4.Thats usually hooked to a 318 2 STROKE Detroit engine back in late 60s early 70s.Since none of these transmissions have synchronizers,if you are going down a big hill,you need to be in the right gear,cause if you pop it out of gear,you are freewheeling,and if you cant get it slowed down with your brakes,and back in gear,it could get real bad in a hurry.Believe me,you wont do that but 1 time.It could be the last time you do anything. None of the big diesels(and Ive worked on them back to the sixtys)had synchronized transmissions.Some had Allison Automatics,maybe stuff like garbage trucks and buses,but big rigs have air shift transmissions,non synchronized 2 counter shaft transmissions that I ever saw.The only synchronizer in the 9,10,speed is high/low range.There is 2 in a 13 speed,high/low main box,high/low back box. That is not a 13 speed really,its a 15 or 16 speed,most likely a old Eaton heavy duty transmission. Look around in the truck and see if there is a diagram,that most likely will tell you if its a low or high range transmission.If its a low range(its been a long time ago,and not real sure about if this is right)with your shift button in the low position you pull the other button up,then shift 5 gears(most times you can start out in 3rd on this low side)shift 3rd,4th,5th,push the button down I think,go to 1st,2nd,third,4th,5th,neutral,shift button on knob to high side,go to 2nd,3rd,4th,5th.No splitter. ![]() Nonetheless, it does take some practice time to shift smoothly.Re: OT HOW TO SHIFT A FULLER TRANNY? in reply to lenray, 12-22-2007 16:32:10Īfter thinking about this and reading what you said to start with(I hope you read this)there is another 13 speed which is a low range. REMEMBER: Learning to shift an 18 speed transmission pattern is not difficult. It depends on the weight of the load, terrain and several other factors.
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