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Discussion Starter #1
hey guys my buddy has a 2007 dodge 5.9liter cummins with 5000 miles on the ticker and a 6 speed tranny. he put a superchip flash pac in it and now he say the clutch slips in 5th and 6th gear when pulling hills with no load any ideas would help oh ya the tuner is set on performance and the installler told him he could leave it there because the only dif between perfornace and towing mode was the shift points and that the manuals did not matter sorry for the long post just want to give u all the info
 

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Shiftin Fool
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1,185 Posts
its time to upgrade to a clutch that will hold more power. he is over powering the stock clutch. depending on how much power he wants will determin the clutch that he will need. but you can never go wrong with a South bend clutch.
 

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Discussion Starter #3
im not familiar with the dodge manual is this a weak link another buddy has same truck and tuner but with auto tranny and he pulls a 30ft travel trailer with no prob. thanx
 

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That clutch is probably glazed over now, tell em to be easy with it until new clutch. Stock transmissions (standard and auto) cant withstand much more power than stock without either upgraded clutch or torque converter.
 

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transmission is not a weak link.. clutch is. call peter at south bend.
 

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On this topic, which is better the standard or automatic; does it really just depend on application? Standard would get better gas milage probably right? is automatic a better torque curve though?
 

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As far as mileage goes, there would be more factors involved other than Auto or Manual such as diff. gearing (higher ratio"numerically lower" = better highway mileage) and driving habits, but generally the Manual gives you much more control over your RPM's. Keeping them low to conserve fuel. Also, watching your boost gauge will help.(less boost= less fuel).

The torque curve you speak of is a different story. In an Auto torque is applied more fluidly throughout the range of gears because it shifts while under power. It doesn't lose boost or de-fuel while dis-engaging a clutch. This whole event of changing gears is also dampened in an Auto by the torque converter.

So I guess it really depends on what you're lookin for. I just like rowin' through the gears.:peelout
 

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dido madd rows of gears!!!!
 
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