Smarty on 05 48re

[Big P]

I have a Suncoast transmission setup with a pretty aggressive valve body. Before Smarty I could feel every shift clearly 1-2, 2-3, 3-4. But with the Smarty it's different. When I drive with the Smarty I am usually VERY light on the go pedal, because I am not into smoking the innocent. :-laf When I say light, it feels like I am only pushing the pedal down about a 1/2"



So here is the deal, under light acceleration from a stop it will shift at about 10mph from 1st to 2nd then immediately into 3rd. It will hold 2nd for literally 1/2 a second. Under heavy to full throttle it will shift like it used to. It will shift hard through each gear.



Anybody with a built 05 auto experience the same thing? I'm wondering if it just an 05 issue because they got rid of the manual TV cable in 05, it's all electronic now. It would make sense because if the computer is getting input from the po pedal, I'm BARELY pushing on it. I probably thinks I'm going down hill! :-laf

 

[lethal injection]

I unfortantly only have the stock transmission but I dont expirence that just for your info with the almost broken stocker.

 

[ChrisKringle]

My transmission was 'short shifting' as well with the bullydog downloader (same low end fueling as Smarty, and yes I have Smarty as well). Very annoying, I used to be into third gear going through a parking lot. Here's how ya fix it. My valve body is a Goerend Bros. I called Dave Goerend and explained. As always, very helpful. He called me the next day, said he'd dynoed some new 1-2 and 2-3 shift springs. I installed them and here are the results. First gear holds till like 15mph or so, and second gear holds till 39mph, around 2000 rpm's. Very nice to drive, does not short shift at all with Smarty, holds second gear no matter what until 39mph (2-2100rpm). That's with 35" tires. I would definitely recommend, all you have to do is drop the pan, pull a few bolts to expose the springs, and swap the 1-2 and 2-3 shift springs. My transmission also used to do alot of 'gear hunting'. 1-2 and 2-3 shifts are mechanical, when the governor solenoid pressure overcomes the spring pressure, then a shift occurs. Stiffer spring, more pressure, holds the gear longer. 3-4 shift is commanded by the ECM, at least that's how everything was explained to me. Correct me if I'm wrong, but no more gear hunting or short shifting.

 

[MMcdonough]

I've got the erratic 48RE shifting issue with my mostly stock 2005 4x4 2500. Based on reading quite a few TRD posts, I found references to the dealer replacing the governor solonoid or VB. Are there any other answers for the 2005's? Do the aftermarket VB's work with the 2005 computer controls and not throw codes? Any other ideas besides +3000$ for a built transmission?

 

[TexasDieselBoy]

I have the same problem it wont hold first and second that long. I to have a stock transmission and am looking to upgrade to an ATS transmission but would no t like to for a while. Is there a fix for the quick shifting? HELP US BOB!!!!

 

[Big P]

We are kind of stuck on the 05's. I've got a fully built transmission and still have the same problem as you guys with the stock units. I am running the stock software now and the transmission shifts fine. The only time my transmission will shift normal with the Smarty is under heavy/full throttle.



I spoke with the guy that built my transmission and he said it would be a simple fix if we had a T/V cable, but in 05 they went electronic. You could change the 1-2 2-3 shift springs like Chris said, but if or when you go back to stock software your shifts will tend to hold its current gear and not want to shift to the next higher gear.



Chris, if you ever "de-tuned" your truck after the spring swap, did you experience any delayed shifting like I described? I think with some fine tuning to the Smarty the problem can be fixed, just hafta wait for it.

 

[sid325]

My truck is completely stock, well almost, MBRP and Amsoil air filter. I’m also installing my FASS very soon. I have the Smarty and love it, but I returned my truck to the stock setting for fear of killing my transmission. I’m interested primarily in settings 1-3. What would you guys recommended for transmission upgrades? I’m looking to go with Suncoast, opinions aside on Suncoast, would VB/TC be enough or should I consider the flex plate? I would love to drop for a complete race transmission, but not practical. My truck is a daily driver and I pull an 8000-pound boat in the summer. What upgrades will complement the Smarty and save my transmission?



Thx,



Sid

 

[Big P]

If you are really going to cap hp mods at 60hp, a torque converter and valvebody should be enough.

 

[Slicks]

I hope Marco can fine tune this, I pulled my 28 ft enclosed on setting 3 and it would be in second by 5-10 mph I don't really like this, other than the that the smarty has been great. Bob/Marco can we get a software fix? It might be great for MPG, but hard on the transmission towing.

 

[TexasDieselBoy]

HAs anybody heard back about this situation of the quick 1-2-3 shift in the stock transmission? Mine doesn't even go into second any more, just 1 st to 3rd. this can't be normal can it? I don't want to return to stock I couldn't live with the power drop.

 

[GaryCarter]

Sounds like this is an issue that needs to be addressed by the programmers. Here's an excerpt from the 2005 service manual:

"The transmission throttle valve cable has been replace by the transmission throttle valve actuator (TTVA). The TTVA

consists of an electric DC motor, two potentiometers, and a gear drive system. The TTVA is mechanically connected

to the transmission throttle valve in the valve body by the “D” shaped opening in the bottom of the TTVA shaft.

The Transmission Throttle Valve Actuator (TTVA) does not require any mechanical adjustments. All changes in throttle

valve position are controlled by the Engine Control Module (ECM). "



Sounds like the programmers have not yet done their homework to coordinate the increased torque at light throttle with and increased position command to the TTVA. This output needs to ramp up with engine torque increases to prevent short shifting.



Gary

 

[lethal injection]

I have a HTS TRANSMISSION and due not exprience this. just for your info.

 

[MMcdonough]

Has this been addressed in newer Smarty software revs?

 

[zstroken]

WIth the 05 your aren't stuck. like your transmission guy led you to beleive. YOu have to do internal changes on the throttle valve circuit. You have to make the throttle valve travel farther since you are fueling more at the same given throttle position.

 

[CRiggan]

If you want my . 02 cents worth. Dave Goerend at Goerend Bros is working on this condition now with the early shifts and gear hunting and he has found some mods that will definately make the 48re better with the smarty. I know the 1-2 spring and the 2-3 springs are swapped out with spings that he provides. and the part throttle vein in the valve body needs to be blocked to keep the gear hunting from happening.

 

[CRiggan]

Give Dave a call and he can describe the part thottle vein in detail. Also I am trying to get Marco and Dave Goerend together on a complete solution for the trucks with the electronic force motors.

 

[sayrew]

I am having some problems with the new trans shift programming as well. I have a full DTT setup and am experiencing the quick 1-2-3 before I hit 20? Also on my 3rd gear shift I experience a pause with a high rev before going to 3rd??? It is really starting to annoy me. If I get into the throttle it doesn't happen.



Bill Sayre

 

[PBax]

This problem is because of the transmission actuator instead of the kickdown cable especially when using a downloader because the downloader alters the signals. One solution is adjusting shift points... . Dusty and Dave do that.

I am having some problems with the new trans shift programming as well. I have a full DTT setup and am experiencing the quick 1-2-3 before I hit 20? Also on my 3rd gear shift I experience a pause with a high rev before going to 3rd??? It is really starting to annoy me. If I get into the throttle it doesn't happen.



Bill Sayre

DTT builder James Northum in Midlothian, Texas is who you need to talk to about yours. 972-467-3702. He and I are working on mine right now.