OS Giken Diff fluid.

Spooler · 09-30-2018, 02:34 AM

I figured I would start a thread about this since I have been chasing
drivability issues with my OS Giken 1.5 way Diff. Ever since I have had it
installed in the car I have had popping, binding, and a total pain in the butt
during slow speed tight turns. I researched on here and found a few threads where folks say to only use OS Giken diff fluid 80w250 but no reason why. I have used many different GL-5 fluids. Motul 75w90, Motul 75w140, Amsoil Severe Gear 75w90 all with Redline LSD additive. I did a diff service on my diff tonight and put in the OS Giken fluid. I don't know what they put in it but it flat out works. No more popping, binding, and shimming in the rear. So now if someone does a search they can find out why to use their diff fluid.

Zat_Zuma · 09-30-2018, 10:43 AM

I believe the fluid has a anti friction solution added. I use to put a couple of ounces anti-bind additive for GM differentials, in mine. Filled up the diff with Shell Full Synthetic Spirax 75-90W GL-5. Seemed to minimize the popping and grabbing in low speed maneuvers and the GL-5 fluid worked well.

My best guess

cv129 · 09-30-2018, 11:30 AM

Nice to see the result from a back to back comparison, thx for sharing.

DarkJak · 09-30-2018, 11:54 AM

Great to know. I just got mine installed with OSG fluid and zero issues.

Spooler · 09-30-2018, 07:48 PM

Quote:

Originally Posted by Zat_Zuma

I believe the fluid has a anti friction solution added. I use to put a couple of ounces anti-bind additive for GM differentials, in mine. Filled up the diff with Shell Full Synthetic Spirax 75-90W GL-5. Seemed to minimize the popping and grabbing in low speed maneuvers and the GL-5 fluid worked well.

My best guess

I put in friction modifier also, Redline. Still sucked. Night and day difference with OS Giken diff fluid.

Justint5387 · 10-01-2018, 09:30 AM

I always use Motul 75w140 for break in, then the OSG fluid afterwards. You spent plenty of money on the diff, use the right fluid.

Rusty · 10-01-2018, 01:32 PM

I've used the OS Giken lube since I installed the diff. You can't tell if it's working until you nail the gas. It's been smooth. $70.00 a liter is a bit steep tho. With the diff cooler. I need 3.

Spooler · 10-01-2018, 09:25 PM

Mine is smooth now too. LOL I was just too cheap to start with.

Rusty · 10-01-2018, 10:09 PM

Quote:

Originally Posted by Spooler

Mine is smooth now too. LOL I was just too cheap to start with.

Opening! You're so cheap. When you walk. You got sparks coming out your azz.

Zat_Zuma · 10-02-2018, 11:00 AM

Quote:

Originally Posted by Rusty

Opening! You're so cheap. When you walk. You got sparks coming out your azz.

I've heard some UpRev users pay extra for that techno exhaust effect
More showy than go

Spooler · 10-03-2018, 09:35 AM

Quote:

Originally Posted by Rusty

Opening! You're so cheap. When you walk. You got sparks coming out your azz.

I learned from the master. LOL

Rusty · 10-03-2018, 03:34 PM

Quote:

Originally Posted by Spooler

I learned from the master. LOL

Ain't me. I'm a baller.

sirnixalot · 10-03-2018, 05:44 PM

I have the same problem with my Nismo 2 way. You've convinced me to give the OS Giken fluid a try to see if it will help.

I'll be sure to update whenever the fluid arrives next month

Justint5387 · 10-03-2018, 05:48 PM

Quote:

Originally Posted by sirnixalot

I have the same problem with my Nismo 2 way. You've convinced me to give the OS Giken fluid a try to see if it will help.

I'll be sure to update whenever the fluid arrives next month

Not sure if this will help a Nismo 2 way. They are cone spring loaded, so it has preload by design

sirnixalot · 10-03-2018, 06:00 PM

Quote:

Originally Posted by Justint5387

Not sure if this will help a Nismo 2 way. They are cone spring loaded, so it has preload by design

Worth a shot ......i hope

09-30-2018, 02:34 AM	#1 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,507 Drives: 2013 Nismo 370z Rep Power: 2684391	OS Giken Diff fluid. I figured I would start a thread about this since I have been chasing drivability issues with my OS Giken 1.5 way Diff. Ever since I have had it installed in the car I have had popping, binding, and a total pain in the butt during slow speed tight turns. I researched on here and found a few threads where folks say to only use OS Giken diff fluid 80w250 but no reason why. I have used many different GL-5 fluids. Motul 75w90, Motul 75w140, Amsoil Severe Gear 75w90 all with Redline LSD additive. I did a diff service on my diff tonight and put in the OS Giken fluid. I don't know what they put in it but it flat out works. No more popping, binding, and shimming in the rear. So now if someone does a search they can find out why to use their diff fluid. DarkJak, Rusty, sirnixalot and 1 others like this. Last edited by Spooler; 09-30-2018 at 12:54 PM.

09-30-2018, 10:43 AM	#2 (permalink)
Zat_Zuma A True Z Fanatic Join Date: Nov 2008 Location: Edmonton, Alberta ...eh Posts: 1,171 Drives: 2017 Touring auto Rep Power: 18	I believe the fluid has a anti friction solution added. I use to put a couple of ounces anti-bind additive for GM differentials, in mine. Filled up the diff with Shell Full Synthetic Spirax 75-90W GL-5. Seemed to minimize the popping and grabbing in low speed maneuvers and the GL-5 fluid worked well. My best guess __________________ [B]2009 & 2017 370Z Touring Sport Autos SOLD

09-30-2018, 11:30 AM	#3 (permalink)
cv129 A True Z Fanatic Join Date: Jul 2011 Location: Dallas, TX Posts: 3,191 Drives: 09 Nismo, 16 Nismo Rep Power: 159827	Nice to see the result from a back to back comparison, thx for sharing. __________________ Setrab \| RE-71 \| SPL \| JRZ \| Nismo \| ARK \| Whiteline \| RacingBrake \| CJM Oil Pan \| Ti shield

09-30-2018, 11:54 AM	#4 (permalink)
DarkJak A True Z Fanatic Join Date: Jun 2011 Location: Madison, WI Posts: 1,390 Drives: 2009 370Z Rep Power: 13448	Great to know. I just got mine installed with OSG fluid and zero issues. __________________ @stupidtoycars \| My track vids 09 7AT\|MCS 2WNR\|Topgunz Rotrex\|Ecutek (Eugene)\|Maxxis RC1\|Titan-7 TS-5\|OSG LSD\|Rear Mount Derale Oil Cooler (WIP)+25 Trans Cooler\|Fismo\|G-LOC R12/R10\|Zeta III L\|NLR Wing and Splitter\|CJM Pan and Fuel Hat\|Radium Surge Tank\|AP Racing CP9668

10-01-2018, 01:32 PM	#7 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 34,858 Drives: 2011 Nismo GM 6M Rep Power: 2684436	I've used the OS Giken lube since I installed the diff. You can't tell if it's working until you nail the gas. It's been smooth. $70.00 a liter is a bit steep tho. With the diff cooler. I need 3. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

10-01-2018, 09:30 AM	#6 (permalink)
Justint5387 Base Member Join Date: Aug 2014 Location: Bay Area, CA Posts: 188 Drives: 2016 370z Silver 6MT Rep Power: 11	I always use Motul 75w140 for break in, then the OSG fluid afterwards. You spent plenty of money on the diff, use the right fluid.

10-01-2018, 09:25 PM	#8 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,507 Drives: 2013 Nismo 370z Rep Power: 2684391	Mine is smooth now too. LOL I was just too cheap to start with.

10-03-2018, 05:44 PM	#13 (permalink)
sirnixalot Track Member Join Date: May 2017 Location: Cayman Islands Posts: 685 Drives: 2010 370Z Rep Power: 57453	I have the same problem with my Nismo 2 way. You've convinced me to give the OS Giken fluid a try to see if it will help. I'll be sure to update whenever the fluid arrives next month __________________ 2010 Sport - LS3 swap loading 2012 Frontier - BTWTuning VK56DE swap

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