New guy from Texas

[5280max]

Hows it going everyone, I am a new guy on this forum. I drive a 07 silverado vortec max ltz 4x4 ext cab. I have owned this truck for almost three years now. I have been a chevy guy since day one! I have only had a few issues with this vehicle since I bought it but, they have all been fixed except for one that drives me crazy! when I come to a stop it feel like some one bumps into me. I have taken it to the dealer 6 times. First they cleaned and greased the slip yoke splines, then replaced the slip yoke with a nickle plated one, then they just greased the yoke every time. nothing has lasted more than a month. I have searched threads, I know this is a common issue but, has any had the transfer case output shaft replaced for this issue? I forgot the tbs # but, it says to replace the output shaft & to not grease the slip yokes on 4x4's. Should i be worried about all the grease they packed in there already? Any advise would be greatly appreciated.

[Stevens03]

No, you shouldn't be worried about the grease IMO. I previously owned an 07 vmax and had very little issue with the truck too. I never had the slip yoke issue on that truck, but my 03 I did. If you drop the drive shaft and re-pack the slip yoke splines with grease, that should take care of your issue. For me, It lasted about 10,000 miles each time.

 

Welcome to the site.

[5280max]

Just wondering if I should let the dealer tear into the transfer case if it is not going to fix anything. Thanks for replie

[Stevens03]

I don't think tearing into the transmissions going to fix anything. It's driveline slop.

[5280max]

The grease was a one week bandage for this truck... Its been done a few times. I just delt with this problem since i have owned this truck. The bulletin # 09-04-21-003d is what i was referring to. Its states to replaced transfer case output shaft if the lubrication procedure has been done already.

[99silveradoz71]

Welcome aboard

[leg7228]

Hello & welcome!

[pwall]

Welcome!

[4wd]

Changed both output shaft and drive shaft, not fixed, may be 50% improvement. GM must provide special grease for 4WD!

 

I wounder if # 09-04-21-003E is addressing this issue finally!

[5280max]

Thanks for replie 4wd.... I took my pickup to the dealer again, they ordered the transfer case output shaft. So hopefully it fixes this one or at least makes it better. The last time I looked in my review mirror at a stop light after feeling a little thump! I was hoping someone really did hit me because I hate looking in the mirror wounding!

[Chiefmorton]

Welcome aboard I hope they get your truck straightend out. I had an 01 Duramax that had the "bump" feel just as you were hitting the gas pedal. I greased the splines on it with no luck and found that the rubber seal in the carrier bearing was shot and I was getting play in the shaft. However that was a 2500HD with a two piece rear shaft. I wish ya the best cause that stuff is damn sure aggravating.