just changed my rear diff! so easy a caveman could do it!
Record Breaker
Joined: Jun 2009
Posts: 1,266
Likes: 0
From: SW Ohio
Roflmao..... As an industrial Maintenence tech I can confirm the level of stank of gear oil,ecspecially gear oil that's been in there waaaayy too long. I changed the oil in a gearbox on a Blanchard machine from the 50's and I think it was the original oil,it was like death when i craked the drain open on that thing!!
Professional
Joined: May 2010
Posts: 142
Likes: 0
From: Columbus, Ohio
Heh heh, thats not what he said, and I thought he changed the diff too. I was about to jump in a scream about gear lash, pinion pre-load, and gear tooth contacts, but all is good now.
-Chris
-Chris
All Star
Joined: Apr 2010
Posts: 879
Likes: 0
From: Kansas
but a black cover wont stick out at all...it'll just look "clean"...
John you should do the calipers the same color now too...that way a few things will match up and flow together...even though you'll really only see calipers while driving at higher speeds.
John you should do the calipers the same color now too...that way a few things will match up and flow together...even though you'll really only see calipers while driving at higher speeds.
Amateur
Joined: Jul 2010
Posts: 44
Likes: 0
Ring Gear 3.92
Hello,
You mention C clips, that means you have a 3.92 diff. Here is what happened to my new 2010 Ram at 2000 miles with the 3.92 differential.
How hard is it to replace the ring gear?
My 3.92 locking differential started making whining noises between 45 and 55 mph. Dealer installed gear kit-ring and pinion, bearings and seals. Mechanic found zero gear backlash and found pinion had no bearing preload.
Sounds like it was made on a Monday or Friday. I am loosing faith in American workmanship but I love my beautiful 1500 SLT Crew Cab, 5.7 Hemi Bighorn with the Ramboxes.
I hope the local machanic did a better job than the one with the Unioin Label.
HKS
P.S I found some pretty scarry posts on other websites about the 3.92 diff falling apart and drive shafts falling off.
P.S.2 The work order stated "Replace rear pinion and bearings and refill fluids and road test" This means they did not put in the ring gear which was part of the kit.
The machanic's notes said "Replaced ring gear and pinion etc." which is a lot more work than just replacing the pinion"
You mention C clips, that means you have a 3.92 diff. Here is what happened to my new 2010 Ram at 2000 miles with the 3.92 differential.
How hard is it to replace the ring gear?
My 3.92 locking differential started making whining noises between 45 and 55 mph. Dealer installed gear kit-ring and pinion, bearings and seals. Mechanic found zero gear backlash and found pinion had no bearing preload.
Sounds like it was made on a Monday or Friday. I am loosing faith in American workmanship but I love my beautiful 1500 SLT Crew Cab, 5.7 Hemi Bighorn with the Ramboxes.
I hope the local machanic did a better job than the one with the Unioin Label.
HKS
P.S I found some pretty scarry posts on other websites about the 3.92 diff falling apart and drive shafts falling off.
P.S.2 The work order stated "Replace rear pinion and bearings and refill fluids and road test" This means they did not put in the ring gear which was part of the kit.
The machanic's notes said "Replaced ring gear and pinion etc." which is a lot more work than just replacing the pinion"
ive been putting this off for awhile now but today i finally changed the rear diff myself. i was worried that it would be harder than it was but it was so easy. i took the cover off cleaned it all out and found no metal chunks on the magnet but i did find a layer of black sludge covering the magnet which probably prevented it from collecting the metal shavings. my ram is blacked out but i wanted to add a touch of color so i painted the cover red with caliper paint. i used the permatex 1 minute gasket maker and as soon as i bolted the cover back on i added fluid and had no leaks 
i did not use a torque wrench - all u need is hand tight then 1/2 a turn till its snug with a wrench. i used royal purple too and its only $11.99 a bottle on amazon.com compared to $19.99 a bottle at local stores. my "c" clips looked good so i left them alone. here r some pics.
i did not use a torque wrench - all u need is hand tight then 1/2 a turn till its snug with a wrench. i used royal purple too and its only $11.99 a bottle on amazon.com compared to $19.99 a bottle at local stores. my "c" clips looked good so i left them alone. here r some pics.
Moderate User
Joined: Oct 2008
Posts: 17,003
Likes: 21
From: Albany, NY
Hello,
You mention C clips, that means you have a 3.92 diff. Here is what happened to my new 2010 Ram at 2000 miles with the 3.92 differential.
How hard is it to replace the ring gear?
My 3.92 locking differential started making whining noises between 45 and 55 mph. Dealer installed gear kit-ring and pinion, bearings and seals. Mechanic found zero gear backlash and found pinion had no bearing preload.
....The machanic's notes said "Replaced ring gear and pinion etc." which is a lot more work than just replacing the pinion"
You mention C clips, that means you have a 3.92 diff. Here is what happened to my new 2010 Ram at 2000 miles with the 3.92 differential.
How hard is it to replace the ring gear?
My 3.92 locking differential started making whining noises between 45 and 55 mph. Dealer installed gear kit-ring and pinion, bearings and seals. Mechanic found zero gear backlash and found pinion had no bearing preload.
....The machanic's notes said "Replaced ring gear and pinion etc." which is a lot more work than just replacing the pinion"
The retainer clips or as u say c-clips have nothing to do with 3:92 which is the gear ratio. it has to do whether or not you have a limited slip differential or an opne one(one-wheel peel).
In order to change the pinion gear which is the small gear all the way in the back, you must remove the ring gear which is the larger gear on the left. The only harder part to change the ring gear would be to remove the 10? bolts that hold it onto the LSD carrier. I'd be very surprised if the mechanic didn't change the ring gear along with the pinion gear as they are a matched machined set, although that would be very dealer like while being under warranty.
