5-spd whine
 

I have an NV3500HD behind my 5.2L. Shifts great, not too clunky. But, it whines under the following conditions:

-At idle, in neutral with the clutch pedal not being stomped on

-In 1st through 3rd gears

I've had the rig for 6K miles and the trans has never given me any mechanical issues, just the noise.

The pitch of the sound gets higher as revs increase, from a lower growl to a high whine.

Could this be a T/O bearing? Input shaft bearing? Any help would be appreciated, thanks all.

Is the noise related to vehicle speed? Or engine speed? (I.E. does it change tone when you shift?)

T/O bearing should really only be noisy when you actually step on the clutch, if it's bad.

It's related to engine speed, and it changes tone when I shift

Might be in trans input bearing then. Have you looked at fluid level in the trans?

Yeah, I changed the fluid/filter right after I got it. Level looked good and fluid wasn't gross

How many miles are on it?

Just rolled over 136k

Just rolled over 136k

Hhhhmmm....... Might be a bearing going.... might be just typical gear noise. I would be tempted to take it to a trans shop that you TRUST...... (I know, rather hard to find....) and see what they have to say.

Quote:

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Originally Posted by KyleYankee (Post 3370304)

Yeah, I changed the fluid/filter right after I got it. Level looked good and fluid wasn't gross

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Is this a misprint? No filter on a NV3500 I assume it is. Also, what fluid did you use?
It should be something like this. http://www.pennzoil.com/en_us/produc...NhbGU9ZW5fdXM=

If you have the correct fluid and its full, its more then likely the front input bearing.

Lol, brain fart!

I used Mopar Manual Transmission Lubricant 4874464 as per recommendation by allpar.

It is sounding like the input shaft bearing then. It's been making the noise for as long as I've had the truck. Is it something I need to fix ASAP?

Crap shoot. Might last forever like that, might blow up tomorrow. Trick is, fix it while it is still cheap, and you don't have to replace the whole trans.

Anyone know the going rate of an input shaft bearing replacement?

Gotta R&R the trans..... so, not exactly inexpensive.... if your clutch/p-plate/t-o bearing are old, good time to change those as well.

Quote:

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Originally Posted by HeyYou (Post 3370587)

Gotta R&R the trans..... so, not exactly inexpensive.... if your clutch/p-plate/t-o bearing are old, good time to change those as well.

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I agree, sorry, but no way to know how long it would last or how much more it would tear up. FWIW I have read where rebuilding the nv3500 is pretty involved. Needs a lot of special tools. But on the other hand, I have read to pull the input shaft and bearing is not too bad of a job......
You may also want to consider running it until it gets worse, then buy a reman, or a used unit to replace it with. If you decide to go used, make sure the donor does not have the electric shifted transfer case. On those, they took the bosses off of the side of the transmission that mounts the transfer case shifter. I have found that out the hard way.

Quote:

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Originally Posted by KyleYankee (Post 3370580)

Anyone know the going rate of an input shaft bearing replacement?

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bearing from rock auto. is $43.89 http://www.rockauto.com/en/catalog/d...t+bearing,8708
The shaft, I think this is the correct one. But double check me. https://www.allstategear.com/NV3500-...p/290-16br.htm

These were the first listings I found, I would shop around before ordering.