sallyman1

Im still diagnosing the weird vibration I get at 95-100 km/hour at highway speed driving empty. I have the 2004 ram 2500 4X4 with 4 speed automatic. recently i noticed this vibration in steering wheel and other things would vibrate like (rear view mirror, gps on window, mirrors etc..)at 85 km hour nothing and at anything over 110 km/hour nothing as well. as a matter of fact the truck seems to really rip over 110 km/hour more than ever???? I ruled ujoints out because the moment you hit tow/haul or drop truck in 2nd the vibration goes away even when u maintain same speed. it seems as though tranny needs to be in 4th(overdrive and 1800-2000 rpm under slight load). i got a little bit of vibration in 3rd gear around same rpm but different speed. any ideas ????

so far i changed fuel filter and purged canister with drain **** open to remove any contaminates or possible gelling. i recently have been adding antigel additives. i checked u joints and found no play although tey could be seized i wont know unless i drop driveshaft. I have about 5-8 psi constant lift pump psi. FCA regulator on cp3 was changed like 5 moths ago. truck had wheel allignment 10 months ago. any ideas? possible cp3 causing stutter at 1800 rpm?

sallyman1

forgot to mention when im experiencing the vibration/shutter at 1800 rpm 100km/hour ill be in overdive (4th) on highway and the instant i let off fuel or hit tow/haul to drop in 3rd (raise rpms) it goes away. thats why id like to rule out u joints because if a ujoint vibrates due to bad needles/seizure it should vibrate at a given speed under load. if i maintai same speed but alter rpms the vibration goes away.

could it be flexplate or torque converter? according to my edge juice my converter locks up in 3rd or 4th at highway speed and shows no slip unless i BAG drive her hard

Festus

sallyman1,

With more information your providing..........have you checked for loose/broken tranny or motor mounts?

sallyman1

actually no. dumb of me not to. i have no garage and the last 3 weeks have been between -29 and -45 celcius out. so no.

i will check that. im also in process of ordering all new precision greaseable u joints. but do u think it could be an injector? although i see no white smoke. tell u the truth my truck smokes less lately.

sallyman1

i had a quik peek and mounts visually look good.