Clutch and transmission fluid

bvar90 · 07-04-2015, 12:35 AM

Hey so I bought a new clutch flywheel setup. I went with the southbend ss ofe and aluminum flywheel. I also got the master cyclinder as well as the zspeed csc. My question is do I have to change my transmission fluid? What about my clutch/brake fluid? Are they the same fluids? What do you guys recommend? And how much of each do I need?

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Zbrah · 07-04-2015, 01:19 AM

If you bought the kit from Zspeed, just let Joe know you also need fluids. He can add it onto your order.

Elmo370z · 07-04-2015, 12:20 PM

Quote:

Originally Posted by bvar90

Hey so I bought a new clutch flywheel setup. I went with the southbend ss ofe and aluminum flywheel. I also got the master cyclinder as well as the zspeed csc. My question is do I have to change my transmission fluid? What about my clutch/brake fluid? Are they the same fluids? What do you guys recommend? And how much of each do I need?

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You bought an upgraded master cylinder? I have some motul transmission fluid if your interested. I bought from z1 motorsports

bvar90 · 07-04-2015, 03:31 PM

Quote:

Originally Posted by Elmo370z

You bought an upgraded master cylinder? I have some motul transmission fluid if your interested. I bought from z1 motorsports

Yes I did. How much? Opened bottle?

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SouthArk370Z · 07-04-2015, 03:46 PM

I suppose you could reuse the clutch fluid if you really had to but I wouldn't recommend it.

More than likely the trans fluid is fine, but, since you're doing all this work, I'd go ahead and replace it. Once a part is broken in, you can't change the oil too often.

The clutch and trans fluid are very different. Clutch (and brakes) = hydraulic; trans (and engine) = lubricating.

Read T · 07-05-2015, 08:45 PM

Use a high quality brake fluid for the clutch (I run PFC, TYP200, or SRF). For trans fluid I run Redline but I'm sure there are other good options (75w90 or whatever, I forgot exactly).

As was pointed out previously, Clutch/brake fluid and trans fluid are very different.

Elmo370z · 07-05-2015, 10:33 PM

Quote:

Originally Posted by bvar90

Yes I did. How much? Opened bottle?

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I just sent you a pm

onzedge · 07-06-2015, 12:57 PM

Quote:

Originally Posted by Zbrah

If you bought the kit from Zspeed, just let Joe know you also need fluids. He can add it onto your order.

JARblue · 07-06-2015, 01:09 PM

When was the last time they were changed? I would definitely change the clutch fluid. Even using high quality Motul RBF600 won't cost that much to flush the clutch system, and the crappy CMC and CSC are particularly susceptible to dirty fluid fouling them up. As for the transmission, I do mine about every 20K miles. It costs <$100 in fluid for Redline MT-85, so I figure why wait. A lot of people go 50K miles or more.

onzedge · 07-06-2015, 01:13 PM

Quote:

Originally Posted by JARblue

When was the last time they were changed? I would definitely change the clutch fluid. Even using high quality Motul RBF600 won't cost that much to flush the clutch system, and the crappy CMC and CSC are particularly susceptible to dirty fluid fouling them up. As for the transmission, I do mine about every 20K miles. It costs <$100 in fluid for Redline MT-85, so I figure why wait. A lot of people go 50K miles or more.

Excellent advice here...

pbs370z · 07-09-2015, 01:09 PM

My clutch kit from Zspeed came with the Motul "Gear 300" 75w90 fluid. Has anyone used this stuff (in the tranny) and did you find it to be an improvement?

I hesitate to put it in as someone who posted here (see below) said the fluid became "gummy". (I find it a little hard to believe). I would like to hear of personal experiences using this stuff.

tia

"Gummy post"
Clutch flywheel combo?
"From about 2 months I upgraded my clutch to South Bend Stage II Daily combo + Silent Disk + ZSpeed CSC + Motul Gear300.

Two note:
After 1400Km, I must return to the Stock Nissan Trans Oil (75W85 GL4), the Motul at first was good, but after some Km starting to be "gummy". In some UK forums, suggests also to buy Moly Slip additive. I bought also this, but the effect (at now) is very impercettible...."

JARblue · 07-09-2015, 03:17 PM

I wouldn't think 75w90 gear oil is proper fluid for a clutch system. I use Redline 75w90 in my differential. I use Motul RBF600 brake fluid in my clutch system.

Jsolo · 07-09-2015, 07:10 PM

75W90 trans fluid is too thick for Colorado. Probably fine if you live in FL or TX. Gears will be difficult to shift in the cold.

I ran redline MT85 for about a year and half (85xx miles). It was great initially but the following winter shifts were difficult until the trans warmed up. Difficult as in I could barely get it into 2nd. Did a trans fluid change back to nissan OE in the middle of january to fix. Perhaps because of the nature of the fluid (performance), the redline stuff just doesn't hold up as well. We'll see how the car does this winter.

With respect to clutch fluid, it's going to get replaced whether you want to or not during the master/slave replacement. Otherwise how else you going to bleed the line. Any decent DOT4 fluid is fine unless you're tracking the car.

pbs370z · 07-10-2015, 05:27 PM

Quote:

Originally Posted by Jsolo

75W90 trans fluid is too thick for Colorado. Probably fine if you live in FL or TX. Gears will be difficult to shift in the cold.

I ran redline MT85 for about a year and half (85xx miles). It was great initially but the following winter shifts were difficult until the trans warmed up. Difficult as in I could barely get it into 2nd. Did a trans fluid change back to nissan OE in the middle of january to fix. Perhaps because of the nature of the fluid (performance), the redline stuff just doesn't hold up as well. We'll see how the car does this winter.

Thanks for your thoughts Jsolo.

Is your Redline MT85 fixed viscosity? I wonder because there ain't much difference between the Nissan (75W-85) Fluid (MTF) HQ Multi 75W-85 or API GL-4, Viscosity SAE 75W-85

and the Motul 75W-90. At least I wouldn't think so... I don't drive it much in the winter so maybe its not an issue for me.

bvar90 · 07-11-2015, 01:05 AM

So as far as transmission fluid goes what's the best option? I bought the motul fluid 300 for the transmission. Will this be a problem? I live in NY.

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07-04-2015, 12:35 AM	#1 (permalink)
bvar90 Base Member Join Date: Feb 2015 Location: long island Posts: 46 Drives: 2009 370z Rep Power: 10	Clutch and transmission fluid Hey so I bought a new clutch flywheel setup. I went with the southbend ss ofe and aluminum flywheel. I also got the master cyclinder as well as the zspeed csc. My question is do I have to change my transmission fluid? What about my clutch/brake fluid? Are they the same fluids? What do you guys recommend? And how much of each do I need? Sent from my SM-N900P using Tapatalk

07-04-2015, 01:19 AM	#2 (permalink)
Zbrah A True Z Fanatic Join Date: May 2013 Location: The370Z.com Posts: 4,956 Drives: 370Z Rep Power: 5452	If you bought the kit from Zspeed, just let Joe know you also need fluids. He can add it onto your order. onzedge and DEpointfive0 like this. __________________

07-04-2015, 03:46 PM	#5 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	I suppose you could reuse the clutch fluid if you really had to but I wouldn't recommend it. More than likely the trans fluid is fine, but, since you're doing all this work, I'd go ahead and replace it. Once a part is broken in, you can't change the oil too often. The clutch and trans fluid are very different. Clutch (and brakes) = hydraulic; trans (and engine) = lubricating. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

07-05-2015, 08:45 PM	#6 (permalink)
Read T A True Z Fanatic Join Date: May 2012 Location: Raleigh, NC Posts: 1,046 Drives: 11 Nissan 370z BC 6M Rep Power: 18	Use a high quality brake fluid for the clutch (I run PFC, TYP200, or SRF). For trans fluid I run Redline but I'm sure there are other good options (75w90 or whatever, I forgot exactly). As was pointed out previously, Clutch/brake fluid and trans fluid are very different. __________________ 2011 Nissan 370z Black Cherry Sport Pkg - Daily Driver, , 1960 Morgan +4 fun car, 1986 BMW 325ES, 1998 M3 and 1996 Spec Miata - Race Cars SUPPORT TEAM WINSOME RACING - WRL, CHUMP, LEMONS

07-06-2015, 01:09 PM	#9 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	When was the last time they were changed? I would definitely change the clutch fluid. Even using high quality Motul RBF600 won't cost that much to flush the clutch system, and the crappy CMC and CSC are particularly susceptible to dirty fluid fouling them up. As for the transmission, I do mine about every 20K miles. It costs <$100 in fluid for Redline MT-85, so I figure why wait. A lot of people go 50K miles or more. onzedge likes this. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

07-09-2015, 01:09 PM	#11 (permalink)
pbs370z Base Member Join Date: Jul 2010 Location: Near Portland, OR Posts: 92 Drives: '10 370Z, Sport Pkg Rep Power: 3370	Motul "Gear 300" Tranny Fluid My clutch kit from Zspeed came with the Motul "Gear 300" 75w90 fluid. Has anyone used this stuff (in the tranny) and did you find it to be an improvement? I hesitate to put it in as someone who posted here (see below) said the fluid became "gummy". (I find it a little hard to believe). I would like to hear of personal experiences using this stuff. tia "Gummy post" Clutch flywheel combo? "From about 2 months I upgraded my clutch to South Bend Stage II Daily combo + Silent Disk + ZSpeed CSC + Motul Gear300. Two note: After 1400Km, I must return to the Stock Nissan Trans Oil (75W85 GL4), the Motul at first was good, but after some Km starting to be "gummy". In some UK forums, suggests also to buy Moly Slip additive. I bought also this, but the effect (at now) is very impercettible...." __________________ '10 Z, Sport Pkg 6 MT, Stillen Brake Cooler, Z1 Oil Cooler w/Setrab 25 row/Mocal T-stat, Southbend Clutch w/light wt Flywheel. Last edited by pbs370z; 08-09-2015 at 05:37 PM. Reason: more info

07-09-2015, 03:17 PM	#12 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	I wouldn't think 75w90 gear oil is proper fluid for a clutch system. I use Redline 75w90 in my differential. I use Motul RBF600 brake fluid in my clutch system. abm89 likes this. __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

07-09-2015, 07:10 PM	#13 (permalink)
Jsolo Track Member Join Date: Dec 2011 Location: chicago Posts: 783 Drives: '12 G37 6MT Rep Power: 14	75W90 trans fluid is too thick for Colorado. Probably fine if you live in FL or TX. Gears will be difficult to shift in the cold. I ran redline MT85 for about a year and half (85xx miles). It was great initially but the following winter shifts were difficult until the trans warmed up. Difficult as in I could barely get it into 2nd. Did a trans fluid change back to nissan OE in the middle of january to fix. Perhaps because of the nature of the fluid (performance), the redline stuff just doesn't hold up as well. We'll see how the car does this winter. With respect to clutch fluid, it's going to get replaced whether you want to or not during the master/slave replacement. Otherwise how else you going to bleed the line. Any decent DOT4 fluid is fine unless you're tracking the car. __________________ G37S Sedan 6MT, Eibach swaybars, Invidia Exhaust, Weaker Clutch Pedal Spring For sale links

07-11-2015, 01:05 AM	#15 (permalink)
bvar90 Base Member Join Date: Feb 2015 Location: long island Posts: 46 Drives: 2009 370z Rep Power: 10	So as far as transmission fluid goes what's the best option? I bought the motul fluid 300 for the transmission. Will this be a problem? I live in NY. Sent from my SM-N900P using Tapatalk

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