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Old 06-14-2012, 05:06 PM   #1
ti-billy
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Default LSD diff fluid change, friction modifier or no?

Hello, I am going to change my rear diff fluid this weekend and I have everything to do it and it is a simple procedure. However I have an LSD rear diff, i've searched the forum to find out if anyone uses a friction modifier in their LSD but I haven't found an answer. I have always used a friction modifier in other vehicles that have LSD rear diffs (like fords and chevys). What do you guys think? Do I use the friction modifier or not?
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1996 318ti base: m44, 5 spd, lsd - 18x8 bremmer kraft wheels w/sumitumo tires 225/40R18 & bmw locking lug studs, 10mm spacers in rear, halo headlights, cold air intake, koni str.t struts and shocks w/mounts, h&r sport springs, serp belts, control arm & tie rod kits, front sway bar links, JVC kd-x50bt headunit w/ipod hook up in the glove box, alpine sps-500(front and rear), jl audio 10" powerwedge max, jl audio 250.1 amp, motor mounts, fuel filter, passenger side window motor, drivers lower window run, muffler hanger kit, various interior bulbs, left door striker/ajar switch, lower hood latches, changed from gray vinal to black leather shift and parking brake boots, m3 weighted shift knob, ngk-r spark plugs, magnecor spark plug wires(blue),new cabin micro-filters,new headliner & a-pillar mouldings, 5w20 synth-blend oil and filter, BG Ultra Guard syn. rear end fluid & ls additive, BG Syncro Shift II syn. manual trans fluids, stainless steel braided brake lines and dot 4 fluid, extra brake light mod, new p/s reservoir and rubber hoses

need to do - fix door panels, paint job, MORE MONEY!!
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Old 06-14-2012, 05:15 PM   #2
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I have an E30 LSD and when I run straight 75w-90 Mobil 1 I don't get any chatter. I briefly switched to 75w-110 Amsoil last fall and had a great deal of parking lot speed/tight turn chatter. I went back to fresh mobil and all the noise went away.
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Old 06-16-2012, 11:28 PM   #3
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Well I changed it with bg ultra guard 75w-90 but didn't use the friction modifier. Put about 15 miles on it, no noise and no problems.
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1996 318ti base: m44, 5 spd, lsd - 18x8 bremmer kraft wheels w/sumitumo tires 225/40R18 & bmw locking lug studs, 10mm spacers in rear, halo headlights, cold air intake, koni str.t struts and shocks w/mounts, h&r sport springs, serp belts, control arm & tie rod kits, front sway bar links, JVC kd-x50bt headunit w/ipod hook up in the glove box, alpine sps-500(front and rear), jl audio 10" powerwedge max, jl audio 250.1 amp, motor mounts, fuel filter, passenger side window motor, drivers lower window run, muffler hanger kit, various interior bulbs, left door striker/ajar switch, lower hood latches, changed from gray vinal to black leather shift and parking brake boots, m3 weighted shift knob, ngk-r spark plugs, magnecor spark plug wires(blue),new cabin micro-filters,new headliner & a-pillar mouldings, 5w20 synth-blend oil and filter, BG Ultra Guard syn. rear end fluid & ls additive, BG Syncro Shift II syn. manual trans fluids, stainless steel braided brake lines and dot 4 fluid, extra brake light mod, new p/s reservoir and rubber hoses

need to do - fix door panels, paint job, MORE MONEY!!
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Old 06-17-2012, 12:49 AM   #4
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I used the Mobil1 75w-90 w/LS additive. I think they sell it with and w/o LS additive. Could the LS additive be the same thing as the friction modifier that you're referring to?
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Old 06-17-2012, 01:03 AM   #5
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Yes it's the same thing
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1996 318ti base: m44, 5 spd, lsd - 18x8 bremmer kraft wheels w/sumitumo tires 225/40R18 & bmw locking lug studs, 10mm spacers in rear, halo headlights, cold air intake, koni str.t struts and shocks w/mounts, h&r sport springs, serp belts, control arm & tie rod kits, front sway bar links, JVC kd-x50bt headunit w/ipod hook up in the glove box, alpine sps-500(front and rear), jl audio 10" powerwedge max, jl audio 250.1 amp, motor mounts, fuel filter, passenger side window motor, drivers lower window run, muffler hanger kit, various interior bulbs, left door striker/ajar switch, lower hood latches, changed from gray vinal to black leather shift and parking brake boots, m3 weighted shift knob, ngk-r spark plugs, magnecor spark plug wires(blue),new cabin micro-filters,new headliner & a-pillar mouldings, 5w20 synth-blend oil and filter, BG Ultra Guard syn. rear end fluid & ls additive, BG Syncro Shift II syn. manual trans fluids, stainless steel braided brake lines and dot 4 fluid, extra brake light mod, new p/s reservoir and rubber hoses

need to do - fix door panels, paint job, MORE MONEY!!
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