clutchless shifting - Diesel Bombers



5.9L 24V Performance Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps Related To Performance And Longevity

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  #1  
Old 06-07-2010, 03:48 PM
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Default clutchless shifting

Does this hurt the transmission in anyway? I heard that its actually better than using the clutch to shift and extends the life of the clutch
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Old 06-07-2010, 04:05 PM
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This has been argued out many times through the years and i can only give you my personal experiences. The NV4500 will powershift and do it pretty easily but the soft metal in the synchro's will not stand up to it. We've rebuilt my tranny twice now and it's easy to see the damage done by doing it.

Just go to any tranny shop that has worked on these trannies a fair amount and they can usually show ya the aftermath.
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Old 06-07-2010, 05:36 PM
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i wouldnt do it. i did it with my nv5600 and now my tranny shifts funny
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Old 06-07-2010, 05:50 PM
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I wouldnt recommend it either they are not designed to shift with out the clutch like uncle bubba said it tears up the syncros
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Old 06-07-2010, 08:43 PM
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i shift all the time with out the clutch aand i have never had a problem with my truck nv5600 is in it i believe if you are good at it and you dont grind gears then you will never have a problem the i see it if you arent suppose to do it the tranny wouldnt let you and i am hard on my trans i shift it hard when i race never has any problems my truck has 189000 on it and i got a buddy that has 315000 on his truck and he shifts with no clutch also and no problems there. just my 2.cents
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Old 06-07-2010, 09:01 PM
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Quote:
Originally Posted by Blue01cummins View Post
i shift all the time with out the clutch aand i have never had a problem with my truck nv5600 is in it i believe if you are good at it and you dont grind gears then you will never have a problem the i see it if you arent suppose to do it the tranny wouldnt let you and i am hard on my trans i shift it hard when i race never has any problems my truck has 189000 on it and i got a buddy that has 315000 on his truck and he shifts with no clutch also and no problems there. just my 2.cents

The NV4500 and the NV5600 are completely different trannies, have nothin in common with each other other then the company that made them.
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Old 06-07-2010, 09:07 PM
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Good to know ill not do it then
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Old 06-07-2010, 10:07 PM
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the thing that messes them up is when you shift from 3rd to 4th or any gear 1-2.3-4.5-6and you hold it in the 4th gear waiting for the rpms to drop enough to get into gear. even if its not grinding. when you just hol it there it weres the syncros and after long periods of time shifting like that the syncros will were out.
just use the clutch. its hard to find parts for those trannies.
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Old 06-08-2010, 01:15 AM
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idk i have got so use to shifting my tranny i dont have to hold it there i get use to putting it in at the right time. my truck doesnt stay up in idle high it drops right when i pull it out of the gear..
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Old 06-08-2010, 01:49 AM
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Originally Posted by Blue01cummins View Post
idk i have got so use to shifting my tranny i dont have to hold it there i get use to putting it in at the right time. my truck doesnt stay up in idle high it drops right when i pull it out of the gear..
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Originally Posted by Uncle Bubba View Post
The NV4500 and the NV5600 are completely different trannies, have nothin in common with each other other then the company that made them.
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