Who wants to be this transmission mod test mule? - Hemi Truck Club
 
Go Back   Hemi Truck Club > Technical Forums > Drivetrain, Differential and Transmission

Reply
 
Thread Tools Display Modes
 
Old 04-12-2014, 02:31 PM   #1
Senior Member
 
Hemidup's Avatar
 
Join Date: Sep 2005
Location: Minnesota
Posts: 1,978
Who wants to be this transmission mod test mule?

Everyone knows we really have no way to increase transmission line pressures except with resistors. The Transgo 2.2 ohm as well as the Sonax Boost controller add about 10-15 psi of line pressure. A 1.5 ohm resistor adds up to 30 psi and seldom throws a low line pressure CEL. Denny tried a .5 ohm resistor and said it made close to 300 psi of line pressure with a constant CEL. By adding a resistor, it basically fakes the TCM into thinking that the clutches are wearing and that by adding more line pressure is its way to make the trans last longer. Kinda like the Power Wire resistor which makes your PCM think that the ambient air is 20* cooler than it really is.

So this got me to thinking.....How about adding a variable resistance controller such as a F1 Hurricane resistor mod or such to the line pressure sensor wire installed just like the Transgo resistor? By adding or subtracting the amount of resistance will effect the way the TCM see's and allows a certain amount of line pressure. You could set it at 2.2 ohm's for daily driving and such, than maybe set it to 1.5 ohm's for a lil towing or spirited street drivng, than maybe 1 ohm for full a out boogie mode. Whadda think?

How about you Redtruck-VA? Your the perfect canidate since you already have a line pressure tester and gauge.

__________________
Built, not bought.
Hemidup is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-12-2014, 03:54 PM   #2
Senior Member
 
FASTHEMIRAM05's Avatar
 
Join Date: Oct 2009
Location: Orlando, FL
Posts: 2,358
I'd do it....
__________________
Modern Performance Engineering
Had 2002 4.7 RCSB 14.2
Had 2011 RCSB 12.41
Had 2012 RCSB 13.99
Had 2016 QCSB 13.0
2011 Drag Truck....

FASTHEMIRAM05 is offline   Reply With Quote
Old 04-12-2014, 04:04 PM   #3
Greg
 
Redtruck-VA's Avatar
 
Join Date: Jan 2011
Location: Virginia
Posts: 19,027
Garage
Quote:
Originally Posted by Hemidup View Post
Everyone knows we really have no way to increase transmission line pressures except with resistors. The Transgo 2.2 ohm as well as the Sonax Boost controller add about 10-15 psi of line pressure. A 1.5 ohm resistor adds up to 30 psi and seldom throws a low line pressure CEL. Denny tried a .5 ohm resistor and said it made close to 300 psi of line pressure with a constant CEL. By adding a resistor, it basically fakes the TCM into thinking that the clutches are wearing and that by adding more line pressure is its way to make the trans last longer. Kinda like the Power Wire resistor which makes your PCM think that the ambient air is 20* cooler than it really is.

So this got me to thinking.....How about adding a variable resistance controller such as a F1 Hurricane resistor mod or such to the line pressure sensor wire installed just like the Transgo resistor? By adding or subtracting the amount of resistance will effect the way the TCM see's and allows a certain amount of line pressure. You could set it at 2.2 ohm's for daily driving and such, than maybe set it to 1.5 ohm's for a lil towing or spirited street drivng, than maybe 1 ohm for full a out boogie mode. Whadda think?

How about you Redtruck-VA? Your the perfect canidate since you already have a line pressure tester and gauge.
Sure I got no problem installing and testing what you have. Have you read my write-up about the Sonnax/Transgo hybrid? I'll see if I can find the link. I'll have to go back and reread some things, but I believe maximum pressure attainable is 240psi due to the mechanical relief valve.

Note: I found this from a old post.

Note: Sonnax and Transgo both excellent line boosters achieve the end result two different ways. Sonnax simply adds resistance in series to the LP sensor value and Transgo add's the value in parallel to the LP sensor. Transgo I look at as being a little more sophisticated as the Line Pressure actually reduces it's offset as the overall pressure increases, where as Sonnax there is a fixed offset at all pressures. A hybrid of the two would really be cool and I have played with it a little without successfully getting exactly what I wanted. The mechanical relief is set for something like 245 psi and I would like to see a consistant 140-180psi. Using a Sonnax I currently get 170psi on acceleration. Criuse it is much lower than I like at 40 psi, but jumps up with any throttle movement. Keep in mind your MAP voltage is a major input for controlling LP. So any tuning using MAP voltage I would highly recommend you monitor your LP to stay safe. Good luck...
__________________
2003 RCSB, 2wd, "Pro-Street"
6.4L/cog driven V7-Ysi/46rh trans/HTH Truckarm coilover suspension. HP Tuning...

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
Redtruck-VA is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-12-2014, 04:46 PM   #4
2012 Truck of the Year
Engine Specialist
 
charged392's Avatar
 
Join Date: May 2011
Location: Fort pierce, FL
Posts: 17,240
Garage
2.2 ohm or 2200ohm

Been looking for that spec for awhile wanted to up my
Line pressure since I currently have no tcm control
__________________
"CMR TUNER" [email protected] 1/4 with a 7.32 1/8 custom long/short bars by "Me" Turbocharged 392 on 9psi S475/96/1.32 . Running thru an A518! [email protected]
charged392 is offline   Reply With Quote
Old 04-12-2014, 04:59 PM   #5
Greg
 
Redtruck-VA's Avatar
 
Join Date: Jan 2011
Location: Virginia
Posts: 19,027
Garage
I found this in my files from some time in the past.

Here’s my evaluation of the two types of transmission Line Pressure (LP) boosters. Frist the Transgo style with a 220K ohm resistor paralleled with the LP sensor which is a pressure operated rheostat. The second type is the Sonnax style which has a 15 ohm resister in series with the signal output. Both types end up with pretty much the same results, but the Trango is a little more sophisticated since it is parallel it adds the most offset value when the LP sensor is reading the least and as the sensor reads higher pressure the offset becomes less. The Sonnax simply adds a fixed value to whatever the output signal is without regard to the pressure value.
My thought is to build a hybrid of the two types. 135 psig is “in gear” pressure for everything but reverse which is 250 psig. Got no idea why reverse is so high except maybe it was just too difficult to regulate so the engineers just let it run off the pump. Anyway I would like to see an initial pressure of 185 psig. Sonnex is suppose to provide 30 psig increase using a 15 ohm resistor so maybe replace that value with 10 ohm resistor and then parallel the LP sensor using the 220k ohm Transgo booster. This would give a varying pressure and still be clamped to a higher overall LP. I have a LP monitoring gage set up so I’ll be able to fine tune the restistor values to get the targeted LP. I read Shardon did a successful test at 185 psig for a off road racer. Can’t find the article now, but I’ll keep looking for it. As for running the higher pressure my thought is if reverse can stand 250 psi why can’t the other clutches? The reduced pressure from what I have read is all about reducing parasitic losses with nothing mentioned about anything else. You can easily see where I am going with this, if and when I blow up a transmission it is going to break something, not just burn up some slipping clutches. Inputs are always welcomed..

I would recheck the resistor values.
__________________
2003 RCSB, 2wd, "Pro-Street"
6.4L/cog driven V7-Ysi/46rh trans/HTH Truckarm coilover suspension. HP Tuning...

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
Redtruck-VA is online now   Reply With Quote
Old 04-12-2014, 06:25 PM   #6
Senior Member
 
Hemidup's Avatar
 
Join Date: Sep 2005
Location: Minnesota
Posts: 1,978
Quote:
Originally Posted by charged392 View Post
2.2 ohm or 2200ohm

Been looking for that spec for awhile wanted to up my
Line pressure since I currently have no tcm control
2.2k ohm. I'd have to check the color bands to be sure.
__________________
Built, not bought.
Hemidup is offline   Reply With Quote
Old 04-12-2014, 06:30 PM   #7
Greg
 
Redtruck-VA's Avatar
 
Join Date: Jan 2011
Location: Virginia
Posts: 19,027
Garage
Quote:
Originally Posted by Hemidup View Post
2.2k ohm. I'd have to check the color bands to be sure.
2.2 k ohm is one of the values Radio Shack sells in a package.
__________________
2003 RCSB, 2wd, "Pro-Street"
6.4L/cog driven V7-Ysi/46rh trans/HTH Truckarm coilover suspension. HP Tuning...

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
Redtruck-VA is online now   Reply With Quote
Old 04-12-2014, 07:12 PM   #8
Senior Member
 
Hemidup's Avatar
 
Join Date: Sep 2005
Location: Minnesota
Posts: 1,978
Quote:
Originally Posted by Redtruck-VA View Post
2.2 k ohm is one of the values Radio Shack sells in a package.
Thats the one that comes in the Transgo kit. And talking about Radio Shack, you going there soon to buy a rheostat?
__________________
Built, not bought.
Hemidup is offline   Reply With Quote
Old 04-12-2014, 08:26 PM   #9
Greg
 
Redtruck-VA's Avatar
 
Join Date: Jan 2011
Location: Virginia
Posts: 19,027
Garage
I thought you had something you wanted tested lol not for me to go build something.. I actually did this in the past and it didn't work like I wanted. I'll give you some observations I have from watching my LP gauge. Idle in neutral 50psi. Hard stop sign take off 160psi. Gear change 110-130 psi. I never down shift with OD turned on. Cruise at highway speed 40 psi. Engine cold, 100 psi. Just idling along down my long driveway 50 psi, any touching the gas pedal will jump to 100psi. This tells me the APPS or TPS is signaling the LP to jump. It seems to be too sensitive to be reacting to a MAP signal change. Maybe modifying a TCM input signal will do what we want. Thinking along the lines of a voltage clamp, but don't really know at this point. My intentions are to use a A518 something with hydraulic controls.
__________________
2003 RCSB, 2wd, "Pro-Street"
6.4L/cog driven V7-Ysi/46rh trans/HTH Truckarm coilover suspension. HP Tuning...

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
Redtruck-VA is online now   Reply With Quote
Old 04-12-2014, 09:09 PM   #10
Stu
 
Join Date: Oct 2009
Location: FL
Posts: 20,375
Garage
Ghost03hemi is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Premium Vendor Showcase
n2 Speed Edge InTune Edge OCPerformance Parts

All times are GMT -6. The time now is 03:41 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.