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NAG1 Slipping on Shifts while spraying N2O

31K views 51 replies 14 participants last post by  jefo 
#1 ·
Hey Guys,

I recently installed nitrous on my 2006 300c AWD with the 5.7 hemi. Spraying a 50shot through the shifts the trans has a hard time shifting, once enough to put it in limp mode. Ran a 12.3@108 though!

How can i firm up the shifts/ raise the line pressure? I have the predator tuner on increased pressure already but it is not enough.

Thanks
Jeff
 
#2 ·
Hey Guys,

I recently installed nitrous on my 2006 300c AWD with the 5.7 hemi. Spraying a 50shot through the shifts the trans has a hard time shifting, once enough to put it in limp mode. Ran a 12.3@108 though!

How can i firm up the shifts/ raise the line pressure? I have the predator tuner on increased pressure already but it is not enough.

Thanks
Jeff
My 07 Magnum R/T that I did heads, cam and procharger on has the same problem. I ran a 12.1@116 going into limp mode. I ordered a dings racing valve body and custom tcm. I will be testing them out this weekend.

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#4 · (Edited)
If you have cooked the frictions and steels, the transmission is on a one-way path that can not be recovered from. The glazing is now the new coefficient of friction within the clutch mechanisms.

So this should really be your first decision; how many and what kind of parts are you going to throw at it...to simply delay (slightly - maybe) ending up requiring a replacement...
 
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#5 ·
If you have cooked the frictions and steels, your on a one-way path that can not be recovered from. Now the glazing is the new coefficient of friction within the clutch mechanisms.

So this should really be your first decision; how many and what kind of parts are you going to throw at it...to simply delay (slightly - maybe) ending up requiring a replacement...
agree 100%

also if it has high miles on the stock trans , it's time for either a refresh or a new trans and converter imo
 
#6 ·
trans is on its way out... in my eyes you have 2 options;
Buy a mopar reman/have yours rebuilt and talk to ding's about a valvebody + tuning.
OR
Buy a performance based transmission from SHR or Paramount and throw it in.

Personally, i'd go with option #1
 
#8 ·
I have a 06 300 SRT8 on a bigger shot it has whats called flare on the 2 to 3 shift if i lower the shot its fine...i was told a performance Valve body will do the trick so i bought a Dings VB getting it installed in about 2 weeks so ill see how it does...
 
#9 ·
What is average cost for stock rebuild??DIY thing??
 
#10 ·
Hit Andy up at east coast moparts, he's a vendor here for a dodge dealer , he can get you a price on the mopar reman one.
Or builder bill or even southern hotrod
 
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#11 ·
The trans has 175k miles. All gears still shift great at the strip when off the spray. The car is a hooptie so it's not worth putting a built trans in it. If it goes it's getting a junkyard unit.
I ordered a Tranzformer and a window switch for the nitrous. I'll raise the shift firmness to the max and shut off nitrous right before the shift; and see what it'll hold. :pepper:
 
#14 ·
you ran a 12.03 with a 150 shot your car is gutted too right?
 
#15 ·
I got my dings valvebody and tune in, no more flare at all. Shifts 1000000% better. Zero issues

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#16 ·
I had mine put in a few weeks ago shifts hard and downshifts hard too...havent sprayed it yet looking foward to it...i have an AJ hemi tuner TCM right now sending an extra TCM to troy to sent it up so i can run either see which one makes a difference ET wise....
 
#32 ·
Not in my opinion. But they can tweak the TCM if it's too harsh for you.

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#35 ·
I'm very happy with ding's valve body and tune, but I did tweek the shift scheduling and a couple other things to match gears and stall. Never liked being in 5th by 35, now it's 58. It now bangs pretty good, friends tell me it's too much. Also agree with owning HPT.
 
#37 ·
What weight is your car?
 
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