545RFE 2-3 shift question - Hemi Truck Club
 
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Old 01-13-2015, 10:06 AM   #1
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545RFE 2-3 shift question

Why does the shift from 2-3 feel sluggish? Almost feels like it goes into neutral for a half second and then shifts. RPM's don't spike or anything so I don't think it's slipping. Drives fine other than that. No codes and trans has been maintained throughout my ownership.

Is this just a design thing? It gets a little quicker in Tow/Haul or under heavy throttle.

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Old 01-13-2015, 10:23 AM   #2
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Yeah that's a known issue and with a shift kit it's fixed it's called a limp shift 2-3 normal for a stock truck and trans setup
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Old 01-13-2015, 10:27 AM   #3
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Ok makes sense. Thanks! Have you used the Sonnax line pressure booster? does that help with this?
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Old 01-13-2015, 10:33 AM   #4
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Tiny bit
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Old 01-13-2015, 01:10 PM   #5
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Could that be a torque management issue?
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Old 01-13-2015, 02:42 PM   #6
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Sounds like Torque Management (TM).

A programmer that will let you adjust the percentage of TM will get rid of that noticable feeling between shifts.

The SONNAX works at WOT, at least it did on my 2004 with the SC Flashpaq.
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Old 01-13-2015, 03:57 PM   #7
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It's a delayed shift yes a tuner will get rid of most but a tuner and shift kit it's gone
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