4.8L 5spd skipshift?
Thread Starter
Teching In
Joined: Jan 2005
Posts: 33
Likes: 0
From: Sulphur, Louisiana
4.8L 5spd skipshift? Has anyone ever heard of a skip shift or lockout in a 2004 single cab silverado 4.8L w/ a 5spd. The truck will not let me shift from 2nd to 3rd @high rpm. That is how i lost to a mustang gt 
can anyone help me?
can anyone help me?
Thread Starter
Teching In
Joined: Jan 2005
Posts: 33
Likes: 0
From: Sulphur, Louisiana
It shifts fine at lower rpm that's what makes me think that it is not a synchro. It locks me out of third when i am driving it hard. Imean taking the rpm near redline, but I have never heard of a 5spd in a truck doing this. Trust me it pisses me off. The dealership down here says there is nothinf wrong because they could not duplicate it. If you aske me they are full of s**t.
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Staging Lane
Joined: Nov 2003
Posts: 78
Likes: 0
From: Murfreesboro, TN
I have the same truck . . . . I also drive a 4.8 5-speed regular cab - my truck never does that, all the way up to 6300 rpm. And yes, that might be why you lost to a GT -
My Transmission is in a few pieces at the shop right now because (while I've never had any shifting problems) recently while my shifter stayed in place, there was a loud clunk occasionally and it felt like something was binding, then popping loose, etc - anyway - I hate the NV3500 - want a NV4500 or (with some extra money for custom install) a T56.
You should get that taken care of - I feel your pain man, and no, it shouldn't be doing that at all.
My Transmission is in a few pieces at the shop right now because (while I've never had any shifting problems) recently while my shifter stayed in place, there was a loud clunk occasionally and it felt like something was binding, then popping loose, etc - anyway - I hate the NV3500 - want a NV4500 or (with some extra money for custom install) a T56.
You should get that taken care of - I feel your pain man, and no, it shouldn't be doing that at all.
I was going to add, I have an NV3500 in my blazer, and the guys on the S10 forums say while it is good for up to 300lb*ft, it doesn't like to be powershifted much. So I'd be careful how much racing you do with it.
TECH Enthusiast
Joined: Aug 2004
Posts: 628
Likes: 0
From: Richmond, Texas
hydraulic slave cylinder is my guess. was happening on my camaro right before the thing disentigrated on me. that or the valve in the cylinder is allowing fluid to pass by therefore the clutch is not releasing so you can switch gears
Thread Starter
Teching In
Joined: Jan 2005
Posts: 33
Likes: 0
From: Sulphur, Louisiana
thanks for all of your responses. since the dealer down here wont do anything, i will just have to take it upon myself. thanks again for all the advice
CHEVY'S RULE (even when they won't let you shift)
CHEVY'S RULE (even when they won't let you shift)
