3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Hey all, I've got a whining coming from the rear end. I have Isolated it to the differential. I have change both Pinon bearings and both diff bearing. But the whining is still there. I took it to the shop today and they quoted be $3500 to replace rear end. Is there any thing else I should check I'm thinking maybe pinon gear???? Thank you for the help. 2005 Ram 1500 2 wheel drive.
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First, find another shop that quote is ridiculous even for an entire new axle .
Do you have the factory LSD? If so, then do a search on here for "C-Clips".
If the bearings have been replaced, then odds are it's the ring and pinion. I doubt you'll need a new carrier if it's just whining. Ring/Pinion and master install kit is about $600 labor included at reputable shops in my area...
did you do the first bearings yourself? if so the preload may not be set correctly you have the spanner nut type and its hard to get the exact preload. also did you check your backlash and gear pattern marks on your pinion and ring gear?
the ring and pinion are probably the culprits, with the bearings being shot and changed there could be an irregular wear pattern on the teeth causing the whining. If you can deal with the whining just leave it ans save some money.
1998 Ram 1500 w/ 360 Air Raid intake, Flow Master exhaust, Superchips, 31" x 10.5" rubber on Eagle Alloys, 5.9L Engine Club #32
2002 Ram 1500 QC w/ 360 K&N CAI, Flowmaster 50 series, SC 3865
I did do the work myself, so back lash and preload could be wrong. That is the main reason I brought it to a shop to see if they would set it correctly and they gave me the $3200 quote, I did not use a new pinion nut each time, is this recommended. As far as checking the pattern I guess you could say I used the old marks on the ring/pinion as a guide so it proably close. I was thinking that I may just drive till failure then I guess I will know what is wrong then thank you.
You should okay with the pinion depth since you're not changing the ring and pinion out, but yeah, I would agree that it seems the bearings may have been going and did some irregular wear on the ring which is causing the whining. A new nut is definitely recommended. It's a bit to swallow, but I'd get one at the dealer. That's one component (as well as the ring gear bolts) I would only trust with OEM parts. I don't have the specs for a 2500, but there are links to the service manual where you can check preload settings, backlash specs and the like. I would wager to say you already have some mileage on those "new" bearings so I wouldn't go by "new" bearing specs any more but perhaps a little on the high end of the "used" bearing specs.
Thanks for the help. I am going to take it apart again this weekend and reset everything. Preload/backlash. I will get a new nut also. I have not done any burn outs with this truck. If this weekend is a failure I guess I will drive it until it fails. I also know a shop is the best way to go but Im having trouble swallowing the price. And besides what fun would that be. LOL.
and a little trick they don't tell you in the book - amongst a million other things - used bearings on the carrier, instead of torquing them to 75 ft./lbs., go a little less like 60 ft./lbs. They don't mention what the torque should be on used bearings for the carrier which makes no sense to me. I had mine torqued to 75 one time after readjusting everything and it ran a bit hotter. Luckily I didn't blue anything, but since then, I've put new bearings in. After a few hundred miles, I measured the force it took to loosen the backlash adjusters and they were right at 60 ft./lbs. which tells me the bearings wore in a little. Beam style wrenches are good for this type of thing.