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Old 04-23-2020, 08:04 PM   #1
RollCoal9000

Name: RollCoal9000
Title: Green Behind the Ears
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Posts: 76
48re weird shift issue while towing

Hooked up to a trailer today to haul some cows. Gross about 26k

Fresh 48re done locally, dpc triple, billet shafts, clutches, transgo, GM solenoid.

While towing, under WOT in D. Truck shifts 1, 2, 2 LOCKUP, back to 2, and wont shift into 3rd unless I let off. Haven't had this happen empty. Nothing slips, lock it in 2 locks up no problem, can pull a hill @60 in 3rd lockup no issue.

Other weird things it does, while empty between 40-45 for a split second under light acceleration it will occasionally shift into od/od lockup then right back to the correct gear. If I do a manual 2-d shift it flares. And with it in 4low and some weight behind it I have to be careful slowing down or the tc doesnt unlock and it almost stalls.

I dont think its mechanical. Hoping it's the transducer or solenoid and not an actual VB issue. Truck is a 2006.
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Old 04-29-2020, 04:49 PM   #2
CGilley

Name: CGilley
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Do you know if they replaced the pressure transducer when they did the solenoid? They should usually be replaced at the same time. I had this problem with my Suncoast 48re years ago and replaced both parts but used the Borg Warner hd solenoid.
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Old 04-29-2020, 04:52 PM   #3
CGilley

Name: CGilley
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Double check me but I believe the OEM Mopar part number for the transducer is 56028196AD
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Old 04-30-2020, 02:44 PM   #4
RollCoal9000

Name: RollCoal9000
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It works for the moment I'll probably end up swapping in a fresh 4l60E solenoid, bd transducer, and a new VSS since it barely works.
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