HELP strange shaking when driving

[1slow94]

Ok here is the deal after putting a fuel pump in my truck i took it for a test drive afterwards and it drove fine well fast forward to the next day on the way to work my truck start shacking like i was driving over some big rocks if u let off the gas the shacking stops and it does this after 35 mph and after the rpms drop down like your just cruzing at 1500 rpm below 35 it doesnt do this so i took it to a local shop cause i cant figure it out and spent $850 to have the whole rear axle replaced plus other things because i knew my rear end was going and thinking that was it well i went to pick it up a week later because they had a hard time finding the axle that it needed well i drive it about a 100yrds and what do u know it still doing it is there any one that has had the same problem im starting to think it is the torque converter or the TCC solenoid any help would be great i really dont have any more money to put in to it if i cant get it fixed anyone want to buy a 94 2wd explorer 4dr cheap or i can light it on fire and we can cook hot dogs and hamburgers

 

[kworonowski]

Before lighting up it sounds like you are not getting good fuel pressure. When they changed out your pump did they change out the pressure regulator and fuel filter. Someone correct me if i am wrong.(dunno if they are seperate parts) But on my wifes car they changed the pump and it ran fine sputtered then died after 10 miles. filters are pretty cheap but hope its an easy fix if its not.

 

[1slow94]

Before lighting up it sounds like you are not getting good fuel pressure. When they changed out your pump did they change out the pressure regulator and fuel filter. Someone correct me if i am wrong.(dunno if they are seperate parts) But on my wifes car they changed the pump and it ran fine sputtered then died after 10 miles. filters are pretty cheap but hope its an easy fix if its not.

i changed the fuel pump just because the float was bad and the gas hand didnt work i really dont know what it coulod be they called me and said my U joints where bad but i dont know i can change U joints my self i mean if my u joints where bad wouldnt the truck shake all the time not just at a certain speed i mean i could be wrong

 

[Tony H]

'U' joints wont always shake All the time. Usually they shake at slow speeds and as the driveshaft spins up faster it tends to center itself and the car smooths out. NOT ALWAYS.
Not sure why they didn't indorm you the 'U' joints were bad when they swapped out the axle. Boy I hope you really need a replacement rear and you didn't spend $850 or a few $23 'U' joints.
Not sure what tools you have but I change my 'U' joints on my vehicles. Sledge Hammer and a Vice. You don't need to Press them out, you can hit them out by seating the bad joint in the vice and hitting down on the Yoke Weld.
http://www.classiccar.co.nz/article...icles/guide-to-replacing-universal-joints-176

 

[1slow94]

'U' joints wont always shake All the time. Usually they shake at slow speeds and as the driveshaft spins up faster it tends to center itself and the car smooths out. NOT ALWAYS.
Not sure why they didn't indorm you the 'U' joints were bad when they swapped out the axle. Boy I hope you really need a replacement rear and you didn't spend $850 or a few $23 'U' joints.
Not sure what tools you have but I change my 'U' joints on my vehicles. Sledge Hammer and a Vice. You don't need to Press them out, you can hit them out by seating the bad joint in the vice and hitting down on the Yoke Weld.
http://www.classiccar.co.nz/article...icles/guide-to-replacing-universal-joints-176

oh the rear end was shot it was missing a bunch of teeth off the gears i have the replacment u joints now i guess im just going to go pick it up and replace them

 

[jd4242]

yea i would have said ujoints right off the bat.