dodge truck problems

[67 heavy chevy]

i have a 2000 dodge ram 1500 with a 360 in it has 4 wheel abs i have two problems i cant fix. first one is the abs come on when you are stoping at a slow speed and makes it very hard to stop already changed the abs computer and the pump.. and the second ? is the f wheel drive dont work already put on a new acuater and checked the vaccum and it is good. when the shifter is 4 wheel there is no light on and when it is 2 wheel the 4 wheel drive light is on does anyone know anything about these problems. next is DYNOMITE.. thank you

[camaro1]

the abs problem is a bad speed sensor, the signal is dropping out at slow speeds and the abs is kicking in because it thinks one of the wheels has locked up/stopped while you are slowing down, you need to get someone to scan the codes and data from the abs module

[67 heavy chevy]

thanks camaro 1

[Chuck]

The slider breaks off in the front diff also, see if it locks in manually with the actuator removed

[UPdragracer]

the vac hoses are on the wrong ports check the connection at the transfercase switch {those are good for failure as well and it might be bad remove the switch and the plunger should move in and out with ease .

Also a bad wheel bearing in front could cause abs problems as well also the rear speed sensor tone ring could have damage and cause abs actuation at low speeds . check all sensor wiring and connections for corrosion and water intrusion