high pitch whining in my drivetrain (1 Viewer)

[missipboy]

it's been down so long i don't remember if it was there before. i just installed my orion and hardtop(hardtop may be the reason i can hear the whining now) and there is a high pitch whining at high speeds. i can hear it in fourth and fifth gears and the pitch changes with speed, not with the shifting of gears. it sounds like it could be a bearing, but my trans was just rebuilt and the orion came with all new bearings. could this be breakin noise? also, i don't have a shifter boot, so it would not be as strong if i had one.

any ideas?????

 

[jjhancock]

what tranny are you running?

 

[missipboy]

nv4500

 

[mr_manny]

mine is also making a little noise.

A buddy said to drain the fluid from both your tranny and xfer case.
Examine the fluid from each separately...the one w/metal deposits is likely the noise maker.

hope this helps.

 

[Josie'sLandCruiser]

Hi All:

Are you using the correct gear oil in each gearbox? The NV4500 requires some special GM lube oil, while AA supplies a specific type of synthetic oil for the Orion t-case.

What shape are the u-joints on the rear drive shaft in? Are they "newer" or original pieces?

Regards,

Alan
Seattle

 

[missipboy]

brand new rear driveshaft and the tranny shop put the oil in the trans. i put 90 weight in my orion b/c that's what they told me on the phone-even though the instructions say something else.

by the way-the orion is brand new this is the first i have run it-about 100 miles on it so far.

 

[cruiserjunktion]

is my girlfriend in there?

 

[missipboy]

amen, brother.

i told my wife to get out, but it was still making the noise.

 

[fng55]

if your noise is speed-related, than it is more likely the front /rear diff or t-case. is the noise load sensitive?
my guess would be rear pinion bearing.
i have also heard that the orions tend to be louder than the stock t-case?
try changeing the oil in the t-case for synthetic?
drive with ear plugs? (my PO's solution, 8 months w/out oil in th t-case.
good luck, carl

 

[missipboy]

the noise is load sensitive. what does that tell me? the rearend has all new bearings and it sure sounds like it's coming from either the tranny or tcase. i also heard that orions were supposed to be more quiet. go figure. anyway, i refuse to wear earplugs, cuz i got almost all my road noise knocked out except for this.

 

[VTFJ40]

Which adapter/shaft are you using to mate the nv to the orion?

 

[missipboy]

using AA adapter and AA 16 spline spud shaft.

not sure of the part number

 

[VTFJ40]

I would think it's the tcase. If the whine climbs with speed it has to be from that shaft back, right?

Have you read Treeroots thread-

https://forum.ih8mud.com/showthread.php?t=25753&highlight=orion

I'm about to put the nv/orion combo together (don't have the orion yet), which is why I'm so interested in this.

Good luck, and keep us posted.