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Old 03-17-2018, 01:46 PM   #1
Justinsixseven

Name: Justinsixseven
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68rfe Tuning

I have some questions regarding 68rfe Tuning and shift firmness. If anyone would be willing to answer a few questions I’d really appreciate it.


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Old 03-17-2018, 04:28 PM   #2
Dom_c13b

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What do you have for questions?
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Old 03-17-2018, 04:49 PM   #3
Justinsixseven

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Quote:
Originally Posted by Dom_c13b View Post
What do you have for questions?


How to make the trans shift firmer besides raising line pressure and how to eliminate the dead pedal feel when the torque converter locks too early


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Old 03-17-2018, 05:26 PM   #4
Dom_c13b

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Firmer shifts: raise your minimum line pressure to 120, and raise your pressure gains to .5 or so across the board.
Dead pedal when the converter is locked will be in your pedal and torque tables.
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06 SCLB. Built 48re, ATS Twin cp3, s369sxe, Fass 220, Hamilton 188/220, 110# springs, DDP 220's, Big valve head, .40 over, 12v rods, balanced rotating assembly. etc..
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Old 03-17-2018, 05:31 PM   #5
Justinsixseven

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Quote:
Originally Posted by Dom_c13b View Post
Firmer shifts: raise your minimum line pressure to 120, and raise your pressure gains to .5 or so across the board.
Dead pedal when the converter is locked will be in your pedal and torque tables.


For a firmer shift do you move the gain number closer or further from zero


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Old 03-17-2018, 05:37 PM   #6
Dom_c13b

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further.
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06 SCLB. Built 48re, ATS Twin cp3, s369sxe, Fass 220, Hamilton 188/220, 110# springs, DDP 220's, Big valve head, .40 over, 12v rods, balanced rotating assembly. etc..
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Old 03-17-2018, 05:39 PM   #7
Justinsixseven

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Originally Posted by Dom_c13b View Post
further.


What about acceleration adders for shift firmness?


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Old 03-17-2018, 05:44 PM   #8
Dom_c13b

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That gets a bit more tricky. I'd start with just minimum pressure and the pressure gains. Most all trans tunes that I've seen have been based off of the H&S OD tune. The original Revmax tcm tunes were just that, h&s OD tunes, line for line.
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06 SCLB. Built 48re, ATS Twin cp3, s369sxe, Fass 220, Hamilton 188/220, 110# springs, DDP 220's, Big valve head, .40 over, 12v rods, balanced rotating assembly. etc..
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Old 03-17-2018, 05:55 PM   #9
Justinsixseven

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Originally Posted by Dom_c13b View Post
That gets a bit more tricky. I'd start with just minimum pressure and the pressure gains. Most all trans tunes that I've seen have been based off of the H&S OD tune. The original Revmax tcm tunes were just that, h&s OD tunes, line for line.


Do a majority of tunes just deal with line pressure, shift points, and TC lockup?


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Old 03-17-2018, 07:05 PM   #10
Dom_c13b

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No all of the other stuff is adjusted as well. Just a lot more to it. And there's a lot of different parameters there, not just the handful for shift points, pressure and lockup.
There's no problem with just adjusting those for the most part though.
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06 SCLB. Built 48re, ATS Twin cp3, s369sxe, Fass 220, Hamilton 188/220, 110# springs, DDP 220's, Big valve head, .40 over, 12v rods, balanced rotating assembly. etc..
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Old 03-17-2018, 08:54 PM   #11
Justinsixseven

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Quote:
Originally Posted by Dom_c13b View Post
No all of the other stuff is adjusted as well. Just a lot more to it. And there's a lot of different parameters there, not just the handful for shift points, pressure and lockup.
There's no problem with just adjusting those for the most part though.


I think the pressure gains are already more than .5. Also can’t you run like 170 psi of LP?


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Old 03-17-2018, 10:01 PM   #12
Dom_c13b

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Yes sir. On a stock trans I usually set pressure at 185
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06 SCLB. Built 48re, ATS Twin cp3, s369sxe, Fass 220, Hamilton 188/220, 110# springs, DDP 220's, Big valve head, .40 over, 12v rods, balanced rotating assembly. etc..
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facebook.com/TenacityTuning
 
Old 03-17-2018, 10:02 PM   #13
Dom_c13b

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Minimum line pressure makes a big difference on shift firmness.
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06 SCLB. Built 48re, ATS Twin cp3, s369sxe, Fass 220, Hamilton 188/220, 110# springs, DDP 220's, Big valve head, .40 over, 12v rods, balanced rotating assembly. etc..
TenacityTuning@Yahoo.com
facebook.com/TenacityTuning
 
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