Or does the E4OD suck? I just rebuilt both my engine (5.8l EFI) and the E4OD trans(& 3.55 rear)- incorporating the TransGo "Tugger" upgrade to the valve body, etc., 6 pinion planetaries, etc., etc., yet she still feels like a bit of a dog... I see newer trucks go by, and they walk away from me... I step into the gas, and there is not the step down I used to feel with the non-electronic trannies... The pedal just goes down, but doesn't seem to DO very much... I can accelerate out from a light, but takeoff underway is annoying... I noticed this with my 03 Interceptor as well- I'm sure that it has an electronic tranny as well... I miss the takeoff I had with my 88 F-150 (5.0, AOD), or even more my 85 Impala 9C1(police package) with a 350/4bbl with the 700R4- You stepped into THAT, and she TOOK OFF SCREAMING... I see the newer pickups doing just that- Why can't I get that anymore with a fully rebuilt engine & trans? Does the electronic tranny just suck THAT much? The engine is jumping- I can see that- but it is like the power is going nowhere...

Scott

 

Time for a five speed swap? But, in all seriousness, I am not a huge fan of automatic transmissions. The wife's SUV has one and I had to put a shift kit in it just so I could tolerate driving it, cure those mushy shifts. I've had six vehicles with manuals and 3 with autos and always had issues with the autos.
​​​​​​​My Nova has a heavily built auto, but only because its to difficult to find the factory manual pedal and linkage setups for that specific year or I'd swap it out.

 

What mods are done to your 5.8?

New trucks have 6 and 7 speed transmissions, very hard for a 4 speed to compete with that kind of available gearing.

 

No mods to the 5.8l- I went with everything factory... But I swear my 5.0 was faster... I wonder if it is possible to swap a newer tranny in...

Scott

 

The shifts aren't mushy- but I just hate stepping into the pedal, and not really feeling it do much... i miss the good old downshift "kick"

Scott

 

Pull codes, check fuel pressure, something is funky

 

No codes(pulled them recently- all happy there, but will double check) but I haven't checked fuel pressure... I'll give that a shot this weekend- I believe I can attach a gauge at the pressure relief valve on the rail (I just put a new one of those in, too!)- Correct?

Thanks!
Scott

 

Honestly, its just you. You got apples, oranges, cherries & orangutans that you're comparing up there in post #1. (An Impala? Really?)

I went to fill up yesterday & was side by side with a 15? 14? Big F, 250 or somesuch for 3 lights in a 45 zone. (mile tween each, hit 50 & then OD)

Without trying to show out or anything my 3.08/short tire eased away from him each time never cracking 2K on the tach.

And my E4 has all upgraded parts & and Trans go shift kit. Sounds like you need a better torque converter.

 

I had two 1993 Lightnings that would downshift with very little throttle while running at cruising speed. My 1992 F350 w/5.8L engine and E4OD would need a lot more throttle before doing the same.

If I would slowly tip in the throttle the transmission would stay in 4th. If I stabbed the throttle to the ~same position it would downshift. The computer monitors the rate of TPS change as well as the value. The only way to fix that is a custom tune to the best of my knowledge.

 

I did just put in a rebuilt stock torque converter when I did the rebuild...

 

That's what I mean by a better TC.

 

Yea, you check it at the rail. I recently finished a 5.8 build on my 97 f250, it runs amazing with the e4od and I hate autos. When it was stock, it was quite tolerable considering it's a light 2wd regular cab.

After the build it took me a few tanks of gas to realize it just didn't run right on the rear tank, no power and terrible shifts. It turned out the rear pump was weak....I never really noticed when it was stock, but it's easy to overlook power loss in stock trim because the power output is so abysmal anyway.

One thing I've learned about these trucks over the many years or owning and building them, when it doesn't feel right...something is wrong. When they run right, they run well.

 

When you change throttle position the engine should downshift so I agree something is wrong. That said I have always hated the lazy shift pattern the E4OD seems to be cursed with, much of that is electronic so maybe that could look into a chip for it. I found my AODs were reluctant to downshift too if the conditions were just right, if you lazily accelerate from a stop up into 3rd and then wanted to accelerate more quickly you pretty much had to floor it and hold it there to make it downshift... that used to annoy the hell out of me.

 

X2....

 

+1 on this! My rear tank has a bad pump that doesn't put out good pressure, making the Buffalo run like squat on that tank. It's a Spring Break project to replace that pump with a new Delphi unit.

I don't have a problem with my E4OD and as far as I know, it has no kits installed. If I mat the throttle, it will blaze the hides in 1st, bark/spin the dogs going into 2nd and shift solidly into 3rd. If I go to accelerate, it does so, downshifting if it's needed.

If an auto trans feels doggy, might be a bad stator in the TC, slipping on its one-way clutch instead of locking under a load.

Just my $0.02 USD worth. YMMV.