I run a diff temp gauge in my truck (99 DRW Ford), with Mobil Syn fluid, and the warmest Ive seen so far is 130 on the highway for 12hrs running 75mph. Unless you swapped the 70, the factory rear axle should be a 10.5 for SRW, or Dana 80 for DRW. Replacing the rear differential entirely costs a … These covers add extra oil and the possibility to run a thermocouple to monitor temperature. Unless you are hotshotting and have HEAVY loads...worthless. For example, compare a 1996 Ford F-250 Crew Cab to the 2017 version. The cost of replacing a rear differential depends on the degree of the repairs that need to be done. Re: Rear Differential Temperature Mar 08 2019, 4:14pm I think he just floats onto the forum and never comes back to follow up on this thread. Rear differential vs Wheel bearing noise. The rear diff was hot enough to keep you from putting your hand on it for more than a 5-10 seconds. Well, on level ground in anything but summer temps, the rear axle will never get off the 140F lower peg. 89-94 DSM: The recommended oil for the rear axle of all the Mitsubishi DSMs GL-5 90w Hypoid gear oil. Just wondering what a normal temperature is for the rear differential. ... rear end gears, and service the carrier if needed. then a year later is still wondering the same thing so posts again instead of looking at his old post. A diff temp gauge is an essential monitoring tool for anyone looking to keep an eye on the temperature of the gear oil in the rear differential of their vehicle. DSM. $74.99. Road racing applications may add an additional pint of oil to the rear diff for added lubrication and cooling. Having the differential oil replaced may solve the problem, otherwise, a gasket or seal replacement may be necessary. This could run the bill up from the $200-$400 range to $600-$800. I monitor the temp to use as a load indicator for testing the aux trans. Back in 1996, maximum towing capacity was 10,500 lbs. The 2019 model offers a 15,000-lb. Most of the HD truck rear differential covers that have fins are aftermarket like MAG-Hytec. So I've been running across I 80 in western Nevada lately and I've noticed that on some of the 7000ft pulls that my rear differential temperature has gotten up to 250 degrees and it's not particularly hot out yet. I checked mine this evening after taking my 24' TT out for a spin to check it out. Rear differential oil recommendations. The differential temperature directly affects the performance of the transmission and rear differential. Just a few parts to replace will cost significantly less than lots of parts to replace. The burning smell might also be a result of an overheating gearbox from poor lubrication. I know there's synthetic in the rears. it's probably right before he's about to tow something, then the rest of the year it's a non-thought Check with your manufacturer which oil you should use for the differential. ... Royal Purple 8.8" Rear Differential Fluid & Seal Kit (86-04) #LRS-F8804K. using a rear differential that held 3.75 quarts of gear lube. Normal operating temperature should be 140* up to 200*. If you can’t find any noises or metal parts in the differential, it could actually be a bad wheel bearing instead of a bad rear axle differential. The oil … towing capacity using a rear differential that holds 3.5 quarts of fluid. I also have a PML diff cover and 3 extra qts in the diff. Subaru Tribeca / Subaru Tribeca 2006-2021 Owners Manual / Instruments and controls / Warning and indicator lights / Rear differential oil temperature warning light CAUTION If the R.DIFF TEMP warning light illuminates, reduce vehicle speed and stop the vehicle in a safe location as soon as possible. This was unloaded however, and in the winter. It's in the 80's today. I use the same amplified oil temp gauges for all three, beginning at 140F and ending something like 320F. Too-old oil cannot lubricate moving parts properly, causing the metal components to burn oil from the high temperature. To break it down further the first number refers to the maximum temp at which the gear oil will reach 150,000 CP (centipoise). REDLINE 80W-140 GL-5 GEAR OIL We highly recommend using Redline 80W140 GL-5 Gear Oil. … the burning smell might also be a result of an overheating from! Most of the transmission and rear differential that holds 3.5 quarts of fluid oil temp gauges for all three beginning. 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