NV3500 Shifting Issues

[Ace17]

The only pre-bled kit I've bought is still sitting on top of my NV3500 in the corner of the shop.

So you're basically saying you're not using it? lol

 

[Ace17]

brand new, and it looks like a short throw of a core hurst.
did not know thrust could bother these.
there is no other excuses that I can think of...
I am thinking your shifter base off by 1-2mm might notice something and go out of align to the tightness of being new.
if a shaft was bent sideways, it would be offcentric, and your shifter going crazy in the wobbles.

I am at 393k.. gave mine a hurst at around 350k.
mine is a 96..not sure when the last update for these was.
they were setup with sensors and nitirided (?) for the extra hp by 96.
it seems infinite to me, no end in sight, noisy whining like a supercharger included.

follwing this thread, it is interesting.
I recently found the nv3500s max hp and torque are identical to an old allison at545.
the 22k pound max limit trans found in school buses and topkicks or gmc 6000 etc.
you jst can't use overdrive or strain reverse...that is the weakest links.

food for thought.
I have proven this is not a weak transmission at all. Could be my year of it...direct swappable to 2007.
hope you find it. optimistically, the problem is tight...not sloppy.

try loosening shifter base, pressure it to the right, and tighten it down while pressured...and maybe the other dierction. It seems something precise is going on there.

Yep, you're on to something here, on multiple grounds.

I drove my truck over to a trans specialist in the early fall of last year, and he saw my short throw shifter, and concluded that at least PART of my problem was the shifter itself. I agree with him only in the sense that the shifter was bringing the problem more to the forefront. Also, I'm guessing it's not the shifter, just because when the truck is turned off, or if the output shaft isn't locked with the truck on, it shifts freely. But I've sense put the older shifter back on, and it does feel better, but the problem really hasn't gone away, it's just masking it better, considering the older shifter with a longer throw has more leverage, making the shifts less of a fight. It's a damn shame really, because I loved that shifter and ended up selling it, but as soon as I figure what the heck is going on, I'm getting a new one and throwing it back on

And yeah I agree with your thoughts on the nv3500 in general - I think if you drive these transmissions like a sane person, taking into account that they're truck transmissions, there's no reason not for them to last a long time. At one point I drove a 96 s10 with a nv1500, and while it had that annoying whine, and sounded like rocks were being kicked around in the trans case at idle, the transmission actually never gave me any issues. I see people bang shifting and dropping the clutch with these nv3500s and it makes me think they're trying to break their trans on purpose lol.

 

[Erik the Awful]

So you're basically saying you're not using it?

It's in reserve. If the professionally built 4L60 I'm about to swap into WCJr doesn't work, I'm ditching the auto and going straight to the NV3500.

Roscoe's getting a 4L80, so I'm not as worried about it.

 

[Sean Buick 76]

I think I would find another trans to swap in at this point.

 

[Ace17]

It's in reserve. If the professionally built 4L60 I'm about to swap into WCJr doesn't work, I'm ditching the auto and going straight to the NV3500.

Roscoe's getting a 4L80, so I'm not as worried about it.

Ahh I see - good luck with the project!

 

[Ace17]

I think I would find another trans to swap in at this point.

Yep... Before I got it rebuilt, my initial thought was to just pull another cheap manual trans from a junkyard to see if felt any different, but I decided to get it rebuilt - might not have been the right choice. idk.

I'm out of town right now, but when I get back I'm gonna try one more time to bleed the living ish out of the clutch master/slave system, and if that doesn't work, I think I might come to the conclusion that this transmission is cursed lol