No machining or welding but shop time non the less.
In preparation for a upcoming haul to CA, I decided to upgrade a few items. The first was to service the rear differential and upgrade to a deeper cover that adds about 2.5 more quarts of gear oil. The cover also has heat sinks both internally as well as externally. I host a magnetic drain plug, magnetic fill/dip plug, two threaded ports for pyrometer application and a large sight glass. The sealing surface is grooved for an O-ring seal.
The second upgrade has been on my radar for quite some time. The rig tends to squat when towing either trailer we have. Both trailers are rated to 14K and have considerable tongue weight. The worst being the 20" flatbed. Air-lift springs where added to the rear axel. 4" spacers where also utilized due to the 6" suspension lift the rig is running.
The last upgrade will include a larger Allison 1000 oil cooler and deep oil pan. The last time I hauled to CA, I encountered slightly elevated tranny temp (250ºF). The larger cooler and pan should drop this considerably.
Found this deal for $318 it included 6 quarts of full synthetic 75W-90 API-GL5. It seems Dodge rigs share the same cover as the GMC of the same era.
After preheating the O-ring (outside) I was able to insert it into the groove without hassle. Arizona temps are good for something
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A shot of the sight glass (passengers side). Notice the plug inboard of the sight glass, The second one is located at the top centered behind the filler/dip plug. The SS cap screws, washers, plugs and small brackets come with the kit.
I been using AFE products for a while and have not had issues with quality thus far.
The Air sprig upgrade is Load lifter 5000 Ultimate series (kit 88275) with internal Jounce. The spacers used where 4" with 4º angle to keep the bags aligned. With the 6" Fabtech suspension lift, the rear block are only 4" to level the rig properly. Most guys simply use 2" leveling kits and call it good. I have always been a GM enthusiast but their rigs are too low from the get go so I opted to raise this one back when I purchased it new. I have not had issues and the rig drives straight with normal tire wear. I will need to upgrade the upper A arms eventually as they are at the max adjustment at this point. Thats another post.
Pre-assembling the kit. All painted brackets are powder coated, air line press in fittings are SS.
Nice to have a lift for this job, The manual estimated the job to take longer that it took.
Used large floor jacks to push up the axel sag for final alignment and torque.
This shot shows axel in full sag with bags installed.
This shows rig on the floor with bags in slight compression (passengers side).
Drivers side.
The two Schrader valves are located under the rear bumper. I already have an onboard compressor and tank so that saved me some $.
I found I needed 7 PSI more for the drivers side to level out the rig (statically). I suspect the offset spare tire is the couplet.
The ride with 14PSI (passenger) and 21PSI to the drivers side made no noticeable difference. Air lift recommends a minimum of 5PSI at all times.
The only time I will deflate completely is when the rig will be serviced and raised on lift. I don't like the strain on the bags from the axel sag. Air lift states this does not pose a problem so long as its not prolonged. The Air springs have a lifetime warrantee.
The Schrader valves.
All done!
Stay safe out there!
Paco