Topic: Re: Dana 35 woes

[RT]

they filled it a quart low  , so i put some nice 85-140 in it and the noise is down like 30% but it's still whining, lower pitched now, at cruise so I'm going to replace the gl5 in my tranny with some redline or royal purple and my tcase fluid if I need it.

[Torch_Ind]

this should be in your first thread?

[Clem]

They need to make THEIR failure right. 1 quart is really low...

[VA_YJ]

From the FSM:

The axle shaft, differential and pinion gear bearings can all produce noise when worn or damaged. Bearing noise can be either a whining, or a growling
sound. Pinion gear bearings have a constant-pitch noise. This noise changes only with vehicle speed. Pinion bearing noise will be higher because it rotates at a faster rate.

Drive the vehicle and load the differential. If bearing noise occurs the pinion rear bearing is the source of the noise. If the bearing noise is heard
during a coast, front bearing is the source. Worn, damaged differential bearings usually produce a low pitch noise. Differential bearing noise is
similar to pinion bearing. The pitch of differential bearing noise is also constant and varies only with vehicle speed. Axle shaft bearings produce noise and vibration when worn or damaged. The noise generally changes when the bearings are loaded. Road test the vehicle. Turn the vehicle sharply to the left and to the right.  This will load the bearings and change the noise level. Where axle bearing damage is slight, the noise is usually not noticeable at speeds above 30 mph.

Based on your description, I thnk the rear pinion bearing is making noise.  I think the shop should be responsible for making rear axle right - low oil can cause damage to the bearings.  High temperature is not the only indication of a problem.  Good luck!

[RT]

From the FSM:

The axle shaft, differential and pinion gear bearings can all produce noise when worn or damaged. Bearing noise can be either a whining, or a growling
sound. Pinion gear bearings have a constant-pitch noise. This noise changes only with vehicle speed. Pinion bearing noise will be higher because it rotates at a faster rate.

Drive the vehicle and load the differential. If bearing noise occurs the pinion rear bearing is the source of the noise. If the bearing noise is heard
during a coast, front bearing is the source. Worn, damaged differential bearings usually produce a low pitch noise. Differential bearing noise is
similar to pinion bearing. The pitch of differential bearing noise is also constant and varies only with vehicle speed. Axle shaft bearings produce noise and vibration when worn or damaged. The noise generally changes when the bearings are loaded. Road test the vehicle. Turn the vehicle sharply to the left and to the right.  This will load the bearings and change the noise level. Where axle bearing damage is slight, the noise is usually not noticeable at speeds above 30 mph.

Based on your description, I thnk the rear pinion bearing is making noise.  I think the shop should be responsible for making rear axle right - low oil can cause damage to the bearings.  High temperature is not the only indication of a problem.  Good luck!

Thanks man, I'm almost certain my tranny's what is whining (syncros) , the noise gets higher pitched, it's noticeable over 70 XP and starts at about 25-30. I checked the fluid, it has good color but it's really thin which makes me think the shop that did my tranny fluid last put 10w-30 with a thickening additive (chrystler recommended) in it. Which is great until a few thousand miles later when the additive breaks down, I just got done with a cross country drive and it would make sense for that to happen. I'm putting redline mt-90 in it to see if things get better. The aisin warner website thingy said high pitched transmission whine was due (most likely) to improper lubrication. HOPEFULLY, this will fix it.

[sharpxmen]

Thanks man, I'm almost certain my tranny's what is whining (syncros) , the noise gets higher pitched, it's noticeable over 70 XP and starts at about 25-30. I checked the fluid, it has good color but it's really thin which makes me think the shop that did my tranny fluid last put 10w-30 with a thickening additive (chrystler recommended) in it. Which is great until a few thousand miles later when the additive breaks down, I just got done with a cross country drive and it would make sense for that to happen. I'm putting redline mt-90 in it to see if things get better. The aisin warner website thingy said high pitched transmission whine was due (most likely) to improper lubrication. HOPEFULLY, this will fix it.

synchros don't whine though but i'm not saying it isn't your transmission.

[RT]

well somethings not happy what about t-cases. it only really makes sound when the drivtrain bites and I accelerate/hover

[dwtaylorpdx]

90 is too heavy for the AX5 bearings in my opinion....

The other applications for the AX5 (Toyota etc) used a synthetic that worked out to be the same as 20w50...

Dave

[VA_YJ]

Some folks get confused about the fill hole on the AX5.  It's on the passenger side, up high and to the rear of the tranny.  Maybe the shop didn't fill it all the way up...  You should also check for leaks, sometimes the front seal starts to leak and you don't realize you've lost a lot of oil.

[dustjunkie]

Trannies usually growl not whine.  The syncro's don't whine at all, they are either loose or tight except when shifting and in transition.  I use either royal purple or penzoil syncromesh in the trannies.

Transfer cases don't really whine either, usually the chain is the first to fail and it starts to clunk when the chain hits the case.

Whining is from the dif, and if it was low on oil then it's pinion bearings.  Dana 35's don't take 2 quarts of oil, so if it was a quart low, it was bad.   I've seen whining pinion bearings go 30k miles and I've seen them give up in 100 miles.  I started a race in Parker with a horrible bearing whine and finished the race.  It was so loud it was almost deafening.

[dwtaylorpdx]

AX5's have issue with the needle bearing in the clusters failing which starts with rough
shifting and some whine in between gears then escalating to a growl between shifts and really notchy shifting..

At least thats whet mine did....

Dave

[RT]

I only have noise when floating with the transmission engaged in the upper 3  gears, I growl a little in second and 1st has always sounded like a remote control car so the bottom too are pretty normal