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Discussion Starter · #1 ·
Ok maybe a silly question...but we have several heavy trucks on the farm. One is a sterling with Detroit 60 series 2, mid 90s with a 10 speed tandem grain box. The RPM drop rate when shifting is slow, like 3 mississippis which is a problem sometimes while trying to shift in fields, especially when softer. My mack semi is less than 1 Mississippi and way easier to shift for example. I'm wondering if the rate of RPM drop can be adjusted any way. Thanks for any info.
 

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This will sound stupid but... turn on the jake brake on low?


Always found Detroits idle down slowly.... especially for a 10 speed where you can't split the gears to make the gaps smaller.
 

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try putting a 8LL in it, or a deep reductin box on the ten speed and make it a 15. detroit, and cummins both idle down slow. try shifting at 1650 rpm, instead of 1900 or 2000 rpm.
 

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Discussion Starter · #8 ·
Ok good suggestions. If you try to shift at 1500 in soft field you won't make it unless on a slight decline, it will be stopped due to soft ground before you can jam it in there. Normally this isn't a problem, but its been wet.
 

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We have 4 trucks all with 60 series. 2 with 10 speeds, 1 with a 15 and 1 with a 13. All pulling trailers. I find during harvest when I try to shift the 10 speeds in the fields if they are very soft I will double clutch and it works perfect for me. Never had to double clutch yet and we have a triaxle behind the 10 speed even.
 

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This will sound stupid but... turn on the jake brake on low?


Always found Detroits idle down slowly.... especially for a 10 speed where you can't split the gears to make the gaps smaller.
I have same set up. If it was not for my jake it would be a bear to shift . I have same tranny in a old jimmy not the 60 model you just barely even half to look at it and it will fall into next gear all by itself.how speendy would it be to ad a jake? Help save money on brakes....
 
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