Hanging in third - Competition Diesel.Com

dangerous06 · 08-14-2016, 09:23 AM

built 48RE Shifts perfect99% of the time but when racing pedal to the floor it will hang in 3rd till 4100rpm then shift into OD. Any thoughts? Normal driving shifts into OD at 50mph. If I let off on the pedal momentarily it will shift into OD But that's a .05 Sec loss in Excel!

dangerous06 · 08-17-2016, 12:05 AM

OK So I explained this wrong or there is no answer?! How do I make it shift faster to OD? When at full throttle?

biggy238 · 08-17-2016, 06:04 AM

The only way to get amore 's 47 to hit OD @WOT was to drop the gov lever back to 80ish %.

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Guang-Zoo Turbo Systems

jlbayes · 08-17-2016, 07:23 AM

I use a switch on the OD circuit. Same idea as a lock up switch.

dangerous06 · 08-17-2016, 08:19 AM

Quote:

Originally Posted by jlbayes

I use a switch on the OD circuit. Same idea as a lock up switch.

Can you post a schematic and any diodes used!

CorneliusRox · 08-17-2016, 08:36 AM

Are the 48re's as simple as the 47re's when it comes to Lock Up and OD? I think they are. There's a 12V+ supplied to the transmission, and when you ground one wire you get lock up, and when you ground another you get OD.

I have mine both hooked up and tapped into at the PCM on the passenger side, then switches on my dash that control solenoids. That way I can tie them directly to the passenger side negative battery terminal and get quick response. When I had it hooked up without a solenoid and just grounded to the chassis, I found an extra .5-1 second delay.

EDIT:
Looks like Pin 15 grounded will give you OD, and Pin 25 will give you lock up if I'm reading that right.

Note that my source on this is google images, so I'd do a little more HW and make sure these are the correct pins.

jlbayes · 08-17-2016, 08:58 AM

Quote:

Originally Posted by dangerous06

Can you post a schematic and any diodes used!

What year is your truck?

jlbayes · 08-17-2016, 09:16 AM

Quote:

Originally Posted by CorneliusRox

EDIT:
Looks like Pin 15 grounded will give you OD, and Pin 25 will give you lock up if I'm reading that right.

Note that my source on this is google images, so I'd do a little more HW and make sure these are the correct pins.

What I found on my diagrams as well. I have a 2nd gen with no diodes either either lock up or od, op.

Dom_c13b · 08-17-2016, 01:13 PM

That shift is controlled by the ecu, talk to your tuner and have them adjust. They can set it to shift where ever you want. When do you want it to shift? I have mine shifting right around 4k, hoping to be able to bring it up to 4200-4500 now that I've got a s369sxe in there. I say let her eat!

dangerous06 · 08-19-2016, 05:26 PM

Quote:

Originally Posted by jlbayes

What year is your truck?

It's an 06

dangerous06 · 08-19-2016, 05:33 PM

Quote:

Originally Posted by Dom_c13b

That shift is controlled by the ecu, talk to your tuner and have them adjust. They can set it to shift where ever you want. When do you want it to shift? I have mine shifting right around 4k, hoping to be able to bring it up to 4200-4500 now that I've got a s369sxe in there. I say let her eat!

yeah mine shifts at 4100 But the hard excel when it finally shifts I want sooner! Am I just not feeling it right? The speedo slows down then finishes it's rotation to the mach one position in seconds after shift!

jlbayes · 08-22-2016, 08:24 AM

I would suggest talking to your tuner. They should be able to set it where you want. I only used the switch method as I have a limited 2nd gen lol. The diagrams posted are what I found in my service info.

08-14-2016, 09:23 AM	#1
dangerous06 Name: dangerous06 Title: diesel tech Status: Not Here Join Date: Mar 2008 Location: Escondido CA Member`s Gallery Posts: 3,564	Hanging in third built 48RE Shifts perfect99% of the time but when racing pedal to the floor it will hang in 3rd till 4100rpm then shift into OD. Any thoughts? Normal driving shifts into OD at 50mph. If I let off on the pedal momentarily it will shift into OD But that's a .05 Sec loss in Excel! __________________ E.D. 66-74-091, T-4 exhaust, 2 Micron filter pre CP3, EFI, S&B intake, ARP 625 head studs, 182-214 Hamilton Cam,springs and push rods,40% injectors, Banks Intercooler, T&C CP-3 & PRV, Built 48RE, 5" exhaust,Carrillo rods, Pacbrake!

08-17-2016, 12:05 AM	#2
dangerous06 Name: dangerous06 Title: diesel tech Status: Not Here Join Date: Mar 2008 Location: Escondido CA Member`s Gallery Posts: 3,564	OK So I explained this wrong or there is no answer?! How do I make it shift faster to OD? When at full throttle? __________________ E.D. 66-74-091, T-4 exhaust, 2 Micron filter pre CP3, EFI, S&B intake, ARP 625 head studs, 182-214 Hamilton Cam,springs and push rods,40% injectors, Banks Intercooler, T&C CP-3 & PRV, Built 48RE, 5" exhaust,Carrillo rods, Pacbrake!

08-17-2016, 06:04 AM	#3
biggy238 Name: biggy238 Title: Too Much Time Status: Not Here Join Date: Aug 2008 Location: Just North of Wrong Member`s Gallery Posts: 10,867	The only way to get amore 's 47 to hit OD @WOT was to drop the gov lever back to 80ish %. Alpha Beta Test Monkey Guang-Zoo Turbo Systems __________________ Check out @bdmaximusworx 05.5 Campanella White TDi Jetta 5spd 45.5MPG -Little Sexy '10 Silver F250 CCLB 4X4 6.4L cummins Swapped Insta @trash.panda250

08-17-2016, 07:23 AM	#4
jlbayes Name: jlbayes Title: Too Much Time Status: Not Here Join Date: Mar 2011 Location: michigan Member`s Gallery Posts: 2,399	I use a switch on the OD circuit. Same idea as a lock up switch. __________________ Jacob, 97 rclb

08-17-2016, 08:36 AM	#6
CorneliusRox Name: CorneliusRox Title: Seasoned Rookie Status: Not Here Join Date: Dec 2012 Location: Detroit, MI Member`s Gallery Posts: 4,154	Are the 48re's as simple as the 47re's when it comes to Lock Up and OD? I think they are. There's a 12V+ supplied to the transmission, and when you ground one wire you get lock up, and when you ground another you get OD. I have mine both hooked up and tapped into at the PCM on the passenger side, then switches on my dash that control solenoids. That way I can tie them directly to the passenger side negative battery terminal and get quick response. When I had it hooked up without a solenoid and just grounded to the chassis, I found an extra .5-1 second delay. EDIT: Looks like Pin 15 grounded will give you OD, and Pin 25 will give you lock up if I'm reading that right. Note that my source on this is google images, so I'd do a little more HW and make sure these are the correct pins. __________________ Corey - BSME '21 Tesla Model 3 Perf '22 DMax AT4 2500 Last edited by CorneliusRox; 08-17-2016 at 08:40 AM.

08-17-2016, 01:13 PM	#9
Dom_c13b Name: Dom_c13b Title: Diesel Enthusiast Status: Not Here Join Date: Oct 2012 Location: Freeport, Maine Member`s Gallery Posts: 125	That shift is controlled by the ecu, talk to your tuner and have them adjust. They can set it to shift where ever you want. When do you want it to shift? I have mine shifting right around 4k, hoping to be able to bring it up to 4200-4500 now that I've got a s369sxe in there. I say let her eat! __________________ 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

08-22-2016, 08:24 AM	#12
jlbayes Name: jlbayes Title: Too Much Time Status: Not Here Join Date: Mar 2011 Location: michigan Member`s Gallery Posts: 2,399	I would suggest talking to your tuner. They should be able to set it where you want. I only used the switch method as I have a limited 2nd gen lol. The diagrams posted are what I found in my service info. __________________ Jacob, 97 rclb