[Redtruck-VA]

Originally posted by bada44:
The best MPG I ever got was on the highway 15.5 I think around town 11 if I'm lucky more like 10.5 I have not used a programer yet....That's next

Tuners really help. You can find a used unlock SC3815 often for $150 or less and it is all you need for a 03. God luck...

 

[bada44]

Update: Had to take the truck back to the shop where I got the gears installed for a hmm that was getting louder by the day. When they took it apart the pinion gear had a grove cut in it. He tried to tell me I didn't do the brake in right. What could have gone wrong? I new it didn't sound right when I picked it up on the first day.

Thanks

 

[Superjay]

What could have go wrong

Bad installation/defective parts.

 

[Redtruck-VA]

Hate to say it, but my opinion is it is usually the installer that is the problem.

 

[bada44]

This guy does this type of work all the time.

 

[Redtruck-VA]

Originally posted by bada44:
I new it didn't sound right when I picked it up on the first day.

Thanks

Of course it is impossible to determine the problem not being there. But R&P gear sets are generally not a problem as they go through a QA process, which leaves the installer as the most likely problem. If the R&P clearance is tight it would burn up quick, if loose then there would have been noise fron the begining. Probably got the pinion load wrong and the bearing has gone bad. Need pictures to better understand the groove you are discribing. Good luck...

 

[bada44]

From what I was told all the bearings look good. I think he is going to reuse them not sure I would. It's there time and money.I'll take pictures and post them if I can.

Thanks

 

[Redtruck-VA]

Yep, would really like to see a picture of the tooth pattern. 4:10 gear runs quiet, mine did from the very start. I did my own rebuild last round and it went sweet. I had a bit more back lash then I thought I should and decided to pull it apart. Just for information DTT has more back lash then one might expected.

 

[bada44]

Originally Just for information DTT has more back lash then one might expected.

G2 Axle & Gear Performance Series Ring and Pinions is what I got. I was told the Back lash was set to 8 thousands.

 

[Redtruck-VA]

Yep, .008 is good for the ring to pinion backlash. The reference I made to the DDT is backlash in the unit (slop) not R&P backlash.

 

[bada44]

Update: I went to the shop to take some pictures and they had to ship it back for a replacement. But I was told that there was an even 1/4 inch grove cut in to the pinion all the way around. Sounds like a defect to me.

 

[bada44]

Hi guys, I now have 500 miles on the new set of gears, but still have a low pitch hum. Went back to the shop and they want to change the gear lube. How is that going to make the hum go away? And what is the best lube to use?

Thanks

 

[Bill_L]

Originally posted by bada44:
Hi guys, I now have 500 miles on the new set of gears, but still have a low pitch hum. Went back to the shop and they want to change the gear lube. How is that going to make the hum go away? And what is the best lube to use?

Thanks

After the 500 mile break in changing the oil is required with any new gears. The break in is really hard on the gears and the oil. The change removes any possible metals that may be in there from the break in as well as any coatings that were on the gears.
As for what oil to use that is really a personal choice, I would see what both Yukon and G2 recommend for your carrier and gears.
If they do not have anything specific that they need then its upto you if you want to run synthetic or not but you may still need friction modifier either way for your limited slip.

 

[Redtruck-VA]

Some carrier manufacturer's recommend specific lube for their gear/carrier. DTT recommends Dino base oil. As for the hum. You already know that it isn't right. The checks that can be done are, check temperature, backlash, tooth print and the amount of torque needed to turn the carrier with the axles pulled. Turn everything by hand and look for something that feels a little rough. The tooth print will tell if the gears are set up correctly. The torque needed to turn everything should tell you if the pinion is torqued correctly. Good luck...

 

[bada44]

Hi guys new update

I brought my truck back to the repair shop today due to the high pitched noise coming from the rear end. I was told that some noise is normal. I said no way. The repair shop claims upon inspection the gears look good with no abnormal wear. Now I am waiting to hear from the manufacturer. I still think that one of the bearings are bad. Any input is welcome. Thanks

 

[Bill_L]

Originally posted by bada44:
Hi guys new update

I brought my truck back to the repair shop today due to the high pitched noise coming from the rear end. I was told that some noise is normal. I said no way. The repair shop claims upon inspection the gears look good with no abnormal wear. Now I am waiting to hear from the manufacturer. I still think that one of the bearings are bad. Any input is welcome. Thanks

With 4.10s the gears shouldn't be making any noise if they are installed correctly.
Did the shop replace all the bearings or reuse any of the old ones? If they did reuse any how many miles were on them?

Do you have any pictures of the wear pattern on the gears so we can see the pattern?

 

[Redtruck-VA]

I grabed this from the service manual.
BEARING NOISE
The differential and pinion bearings can all produce noise when worn or damaged. Bearing
noise can be either a whining, or a growling sound. Pinion bearings have a constant-pitch noise. This noise changes only with vehicle speed. Pinion bearing noise will be higher pitched because it rotates at a faster rate. Drive the vehicle and load the differential. If bearing noise occurs, the rear pinion bearing is the source of the noise. If the bearing noise is heard during a coast, the front pinion bearing is the source. Worn or damaged differential bearings usually produce a low pitch noise. Differential bearing noise is
similar to pinion bearing noise. The pitch of differential bearing noise is also constant and varies only with vehicle speed.

I would perform the pinion torque test to see if it is within spec. as a check to get started. Pinion torque is critical. Good luck.

 

[bada44]

Thanks for the quick reply.They reused the bearings. There was about 500 miles on them after they changed out the gear set. And the noise is at it's loudest at 50mph at 20mph to 10mph it sounds like pushing a pencil in & out of an electric sharper but not as loud if that makes sense.I'll try to take some pictures tomorrow....Thanks

 

[Ghost03hemi]

Originally posted by bada44:
at 20mph to 10mph it sounds like pushing a pencil in & out of an electric sharper

 

[Bill_L]

Originally posted by bada44:
Thanks for the quick reply.They reused the bearings. There was about 500 miles on them after they changed out the gear set. And the noise is at it's loudest at 50mph at 20mph to 10mph it sounds like pushing a pencil in & out of an electric sharper but not as loud if that makes sense.I'll try to take some pictures tomorrow....Thanks

If the first set of gears you had eat the pinion gear and left a big groove in it that metal had to go somewhere per your other posts I would have changed out all the bearings including the axle bearings since there was a chance of metal particals being everywhere the gear oil goes.

I know this probably isn't what you wanted to hear but its just my opinion and what I would have done. I would think that a good shop would have recommended this as well.