Ok, so heres the deal. I can grab 1-2, 3-4 all day. 2-3 Shift is horrible/not even a option above 5k. Doesn't grind, just doesnt go into gear.

With that said, when I shift 1-2 and the trucks not moving, I can still here the syncro's working to make it happen.

Clutch engagement feels fine, about 3-4 inches off floor. However, with that dragging sound seems like clutch is dragging. Is that whats killing my 2-3 shift?

I have't done the clutch line mod, kicking myself for not doing that when I swapped in this junkyard, 25k mile used 3500. Any one done this mod and it really helped out?

Also think about tossing this in to be used with the stock flywheel, pressure plate to stop the dragging.

http://www.jegs.com/i/Ram+Clutches/798/6122/10002/-1

My only fear is after all this, it still won't go into 3rd.

Thoughts? Thanks

 

I have the same issue with mine at very low HP levels. I have not done the clutch line mod yet either.

 

It is a problem with the internal rail linkage. After a few hard shifts it gets worn and won't shift hard anymore. It's not a problem with the early NV3500's in the 90's models but a problem when they updated it in the 2000's. Those transmissions are very strong but just can't handle a hard and fast 2-3 shift too many times. You just have to shift it slow, even when giving it hell. It's hard to do I know.

 

mine seems to work. with an 8.1 in front of it. what is this clutch line mod you speak of though

 

Factory 8.1's have the NV4500 I think.

Look up drill mod on ls1tech.

 

my 1500 4.3 5 speed truck i dont think is a 4500. and now it has the 8.1
anyhow so the clutch line to master cylinder needs to drilled or replaced with a new after market braided line?

 

It's just the fitting at the end of the line going into the master cyl. You can drill it out if you are having shifting issues at high rpm and it may help. There is a restriction that won't let the clutch release fast enough.

 

So the trucks have the same issue as the f bodies

 

They have a similar restriction but not really the same shifting issues. I drilled mine years ago but I don't remember if it helped. It won't help the 2-3 shift problem.

 

I think i will just replace the line when i swap everything else out