P0746

M.hulsey91

M.hulsey91

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Apr 25, 2015
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I have 2005 2500hd with efi live with dsp5. I threw p0746 last night. Had a shop look at it and said the pressure controll solenoid was stuck off? They reset the dtc. Do i need to worry or should i get it rebuilt? Just get it serviced? Idk what to do with it.. suggestions? Please and thanks.
 
Mike L.

Mike L.

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P0746 is a slipping clutch that is controlled by trim solenoid A. It's not the solenoid.
Simply stated; you don't have enough trans for the amount of power you are running. Resetting the code is like putting a band aid on a large gash. You no longer see it, but it's still there and will get worse.
 
M.hulsey91

M.hulsey91

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Mike L. said:
P0746 is a slipping clutch that is controlled by trim solenoid A. It's not the solenoid.
Simply stated; you don't have enough trans for the amount of power you are running. Resetting the code is like putting a band aid on a large gash. You no longer see it, but it's still there and will get worse.
Click to expand...
Thanks. So pretty much avoid hot tune till i get it rebuilt? Will it still be fine to daily drive?
 
Mike L.

Mike L.

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I would avoid any tune after the first limp. Even a small tune will sneak up on you and bite you.
 
Stancedlb7

Stancedlb7

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Feb 9, 2015
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Throw Mikes line upgrade and a shift kit at it. Flat tire your converter flow valve. Even with stock clutches your trans will be ALOT better!
 
M.hulsey91

M.hulsey91

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Well they got rebuild done but when test driving they said it wasn't shifting right? Said they were going to look at it fri..? I'm just ready to get it back.
 
Robby05

Robby05

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M.hulsey91 said:
Well they got rebuild done but when test driving they said it wasn't shifting right? Said they were going to look at it fri..? I'm just ready to get it back.
Click to expand...

Ohhhh boy. Been there before. Have any idea what parts they installed? Have they done Allison rebuilds before?

If you didn't before you need to now!!!! Find out what exactly is going on & what their plan is to fix it.
 
M.hulsey91

M.hulsey91

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Apr 25, 2015
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Robby05 said:
Ohhhh boy. Been there before. Have any idea what parts they installed? Have they done Allison rebuilds before?

If you didn't before you need to now!!!! Find out what exactly is going on & what their plan is to fix it.
Click to expand...
They said they have done allison trans before. Idk on parts though.
Awenta said:
Who are they?

Sent from my SM-N910V using Tapatalk
Click to expand...
Aamco
Stancedlb7 said:
Did they "quick relearn" it?
Click to expand...
I do not know if they did or not.
 
WolfLMM

WolfLMM

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Of course it isn't shifting right, they installed new clutches with different clearances than your old ones had. The tcm has no idea the trans has been refreshed. It still thinks it has X amount of time to fill/release a clutch pack when in fact it has Y amount of time now...

If this shop has built allisons before, they should know this.. Relearn and fast learn.
 
M.hulsey91

M.hulsey91

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Apr 25, 2015
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WolfLLY said:
Of course it isn't shifting right, they installed new clutches with different clearances than your old ones had. The tcm has no idea the trans has been refreshed. It still thinks it has X amount of time to fill/release a clutch pack when in fact it has Y amount of time now...

If this shop has built allisons before, they should know this.. Relearn and fast learn.
Click to expand...
Thanks I'll call and ask em
 
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