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Discussion Starter · #1 ·
I just noticed this about a week ago. Only happens intermittenly but when I come to a stop sometimes it feels like the transmissions slams into gear (neutral). Anyone else experience something like this?

Oversize tires causing the problem :shrug:
 

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Discussion Starter · #3 ·
Yeah, I know neutral isn't a gear but when I come to a complete stop it sounds like the tranny is shifting hard. But never thought it could be the drive shaft going into the tail housing?
 

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OG
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I think my 08 nnbs 2500 work truck does this. it always seems to happen when the rpms hit a certain number. almost feels like a slight downshift or a shift into first when coming to a stop. mainly notice it at red lights and stop signs.
 

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OG
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I think my 08 nnbs 2500 work truck does this. it always seems to happen when the rpms hit a certain number. almost feels like a slight downshift or a shift into first when coming to a stop. mainly notice it at red lights and stop signs.
 

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OG
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I think my 08 nnbs 2500 work truck does this. it always seems to happen when the rpms hit a certain number. almost feels like a slight downshift or a shift into first when coming to a stop. mainly notice it when coming to red lights and stop signs.
 

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I don't have a truck
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I think my 08 nnbs 2500 work truck does this. it always seems to happen when the rpms hit a certain number. almost feels like a slight downshift or a shift into first when coming to a stop. mainly notice it at red lights and stop signs.
I think my 08 nnbs 2500 work truck does this. it always seems to happen when the rpms hit a certain number. almost feels like a slight downshift or a shift into first when coming to a stop. mainly notice it at red lights and stop signs.
I think my 08 nnbs 2500 work truck does this. it always seems to happen when the rpms hit a certain number. almost feels like a slight downshift or a shift into first when coming to a stop. mainly notice it when coming to red lights and stop signs.



orly?
 

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big nick
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1,109 Posts
its the drive shaft slipping into the tailshaft of the transmisision. You can take the drive shaft loose at the rear diff and pull it out the transmission, lube the splines with some trans assembly lube and stick it back in. It will last for about 3-4 months and you'll have to do it again. The fix to correct this problem is replace the trans tail seal, which you have to completely tear down the transmission to do so. You also have to take it to the dealer and complain about it 4-5 times before they will fix it. I'm on my 3rd lube job.
 

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ɹǝqɯǝɯ sɟɯb
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Just had the dealership lube my splines (under warranty) Thursday and the symptoms are gone. As soon as I started to describe the problem they knew exactly what I was talking about. So it's obviously a known issue with these trucks and I guess replaced the annoying steering shaft knock from the NBS.

I thought it was possibly tranny related too and started around 15k. I'd feel a bump, almost like someone tapped my rear bumper but you could tell it was in the drive train. So I thought the tranny was getting some slack or having trouble downshifting. It happened mostly when coming to a stop and was worse when making a quick stop. And sometimes I'd even feel the bump after I'd stopped and the brakes were still applied.

The trans tail seal sounds like a fun procedure.
 

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GMFS Military Member
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Ill have to do this next time I under my truck :handshake:
 

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Discussion Starter · #15 ·
I think my 08 nnbs 2500 work truck does this. it always seems to happen when the rpms hit a certain number. almost feels like a slight downshift or a shift into first when coming to a stop. mainly notice it at red lights and stop signs.
I thought it was possibly tranny related too and started around 15k. I'd feel a bump, almost like someone tapped my rear bumper but you could tell it was in the drive train. So I thought the tranny was getting some slack or having trouble downshifting. It happened mostly when coming to a stop and was worse when making a quick stop. And sometimes I'd even feel the bump after I'd stopped and the brakes were still applied.
Thats exactly what it feels like.
So is the only fix that the dealership is doing is just lubing the splines? ANyone get any crap from them blaming it on the lift?
 

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I just live with it lol
 

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Your HID Preferred Vendor
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Have them do it 4 times and yell buy back :)
Buy back over a clunk on a lifted truck? LMFAO!!! NOT how a buyback works. You might be lucky enough to get a service manager to warranty the clunk for you, especially since if its a known problem, but you will definitely NOT be getting a buy back.
 

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Diego Mafia
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buzz kill.
 
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