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4x4 strange noise please help

Discussion in 'Chevy Trucks' started by pongow26, Dec 23, 2008.

  1. pongow26

    pongow26 Senior Member
    Messages: 153

    I just got a diffrent plow truck and it is make a noticable clunk when I go from 4hi to 4lo. I have a 98 Z71 1500. I am not too familar with chevy trucks and wondered if that was normal. Once in 4lo it seems to plow just fine no problems. It just seems to lock in hard. It makes the same noise when I go from 4lo to 4hi as well. I just had the transfer case, front drive shaft and all ujoints changed as well. Anyone else have the same noise?

    FLASHMAN Member
    Messages: 78

    I have a '98 K1500. same thing... Normal that's just the transfer case locking into the lower ratio. I am a little curious though, do you plow in 4 lo all the time? if so, why?
  3. chcav1218

    chcav1218 Senior Member
    Messages: 954

    ...I don't think my truck will even shift into 4low. It has electronic shift and when i press 4low the light just blinks and never goes solid. Idk, its in the shop now.
  4. 042500hd

    042500hd Senior Member
    Messages: 251

    This may be a dumb question but... You are putting the truck in neutral then putting into 4lo right? If not all you will get is the flashing light.
  5. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    Sometimes mine seems to shift into LO easier and smoother if i let the truck roll slowly in neutral and push the button.
  6. chcav1218

    chcav1218 Senior Member
    Messages: 954

    no im not in N but im stopped. maybe thats my problem, its in the shop for other stuff though, i told him to just look at that. My check 4wd light was on and a door is broken.
  7. pongow26

    pongow26 Senior Member
    Messages: 153

    Yes I do because it is easier on the transmission. Although, I jus recently started doing this and my local 4x4 shop told me so. I tend to believe them since they sell alot of plows. It uses less rpms yet gives the same pushing power I think
  8. ChevKid03

    ChevKid03 Senior Member
    Messages: 505

    The 4wheel LO will not engage without the transmission in Neutral.
  9. beatle78

    beatle78 Senior Member
    Messages: 175

    You HAVE to have the tranny in neutral for the truck to go into 4lo. 4hi is shift on the fly.