How hot is too hot for you 10 Bolt?
11-25-2013, 10:29 PM
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How hot is too hot for you 10 Bolt? Tonight I finished putting my differential back together after my pinion nut backing off and causing a ton of gear noise on decel.
What I did was completely disassemble the rear checked all bearings and races, especially the pinion bearings and races. Everything looked good so I reassembled the rear with the seasoned pinion bearings, preloaded them with about 15 in/lbs per spec.
Since all the bearings are used and the pinion bearing were pre-loaded at the used spec and I ended up giving the car a pretty good workout using all of the power listed in my sig up about 110 mph
After I parked the car I shot the diff with my IR thermometer and found temps ranging from 165-175 degrees, I drove it for a total of about 20 miles before leaning into it too hard. Now my question is what kind of temps have you guys seen? is this ball park for this tiny rear end and 400+ hp?
What I did was completely disassemble the rear checked all bearings and races, especially the pinion bearings and races. Everything looked good so I reassembled the rear with the seasoned pinion bearings, preloaded them with about 15 in/lbs per spec.
Since all the bearings are used and the pinion bearing were pre-loaded at the used spec and I ended up giving the car a pretty good workout using all of the power listed in my sig up about 110 mph
After I parked the car I shot the diff with my IR thermometer and found temps ranging from 165-175 degrees, I drove it for a total of about 20 miles before leaning into it too hard. Now my question is what kind of temps have you guys seen? is this ball park for this tiny rear end and 400+ hp?
11-25-2013, 11:02 PM
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My stock 10 bolt with 3.42s w/114k miles ran luke warm. Another 10 bolt that I rebuilt with new bearings and 4.10s ran hot enough that you couldn't keep your hand on it. My S60 with 4.10s runs hot too, IMO steeper gears and tighter bearings run hotter. You don't say what ratio you're running.
11-25-2013, 11:08 PM
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Im running motive 3.73's, I don't have any basis for comparison unfortunately. My only worry is I fubared the pinion pre-load which is causing it to run hotter than usual
11-25-2013, 11:33 PM
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I did have the carrier out but didn't bother to check the backlash because I don't have a dial indicator and it was a good gear setup to begin with, I did of course make sure to keep track of the shims and install them in their original locations
