My expy pulls back

[Exp099]

Ineed help ihave 99 5.4 Xlt and everytime im on the freeway going past 50mph or more for some reason when i let go of the gas it feels like it pulls back hard and starts to slow down pretty quick its like if im pressing on the brakes.. inoticed it got worse after i installed the body lift.. does it need new transmission, something with the brakes?? Or is this normal? has any body expierence this?

 

[tallsville]

may sound stupid but is ebrake on?

 

[treycool94]

overdrive off??

 

[pooleo8]

hmmmmm, the "work" truck I sometimes drive does this same thing, noticed it today. Its a 2000 F-150, 4.6 auto 2wd. Almost feels like the engine shuts off.....or something

 

[Exp099]

may sound stupid but is ebrake on?

No the E-brake is fine and is not on..

 

[Exp099]

overdrive off??

you know my overdrive button doesn't work.. idk why

 

[Exp099]

hmmmmm, the "work" truck I sometimes drive does this same thing, noticed it today. Its a 2000 F-150, 4.6 auto 2wd. Almost feels like the engine shuts off.....or something

Oh really wow well mine doesnt get to that point where its almost going to shut off

 

[1997SCEBFEX]

This sounds similar to the "diesel engine brake" phenom. What rpm's @ 50 w/ the new meats? Did you change set points in your computer to compensate for the change in tire size etc?, thus perhaps increased drag from the lift, largers meats etc.?
Could one of your brakes be dragging, or the ebrake not fully releasing as mentioned above, or trans selector not properly indicating which gear its in. Could also be a wheel bearing issue, but think you'd start hearing that. Any change to the trans/torque converter for serious towing?

 

[Exp099]

This sounds similar to the "diesel engine brake" phenom. What rpm's @ 50 w/ the new meats? Did you change set points in your computer to compensate for the change in tire size etc?, thus perhaps increased drag from the lift, largers meats etc.?
Could one of your brakes be dragging, or the ebrake not fully releasing as mentioned above, or trans selector not properly indicating which gear its in. Could also be a wheel bearing issue, but think you'd start hearing that. Any change to the trans/torque converter for serious towing?

The rpm at 50mph usually alil over at 2000 rpm.. No ihavent changed any shift points from the computer.. Iwill Check all of My brakes tomoro.just to make sure is not that and see if ican fix My overdrive. No changes to torque converter or computer

 

[Mikeyss]

Have you recently replaced your battery, or have you had it disconnected? I know when the battery is disconnected and reconnected, a similar thing happens. You are up to highway speeds, and you let your foot off the gas pedal and it seems you downshifted a gear. If this is what you are referring to, try this: when you are up to highway speeds and no one is around you, let off the throttle and coast until it feels it upshifts on its own. If it upshifts while you coast (takes several seconds), then the problem goes away. This may or may not be the problem you are having.

 

[masterhacker]

Mine does the same thing, but only when Im doing 100 (yes i know that's the speed limiter)

 

[jacks3am]

you need to get your truck tuned, mine runs like 1600 rpm's at 55, maybe a regear will be in order, or you might not even be going the speed you think you are because your speedo is off

 

[workman8505]

mine does something similar but its when i am getting off the interstate from 70 or 80 when i coasting down if i pop the throttle at around 50 or so it will act almost like it has a jake brake (diesel) but you can tell its in the trany it down shifts real hard almost like i ****** it down into 2nd. mine is bare bone stock expt for a supper 44 two chamber flowmaster. i just try not to do it but my flowmaster sounds really good when it does it. lol damn i need a one chamber. any one want to trade a one chamber to a two chamber lol