R35 - Using gear oil as TM oil - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

RTG · 8th July 2008, 09:34 AM

I know of a few owner has replaced the TM oil with 75W-140 gear oil, for the sake of lower gearbox noise. So far the only noticeable setback is a higher TM oil temp, can anyone one shed some lights on this ?

doggiehowser · 8th July 2008, 10:47 AM

Errr... have you compared how different the viscosity of the transmission oil is from the diff/final drive oil??

RTG · 9th July 2008, 12:00 AM

I have not personally seen the TM oil but was told by the mechanic that the R35 TM oil are pretty low in vicosity, probably close to TM oil used in a typical auto trans, definitely far from differential oil.

doggiehowser · 9th July 2008, 02:04 AM

Yeap. TM oil is almost like engine oil.

In any case, why not use the original Nissan TM oil?

I know even tuning houses like Amuse/MCR use original Nissan TM oil, even if they change the diff/final drive/engine oil to other brands.

vex · 9th July 2008, 02:18 AM

Quote:

Originally Posted by RTG

So far the only noticeable setback is a higher TM oil temp

tm oil temp is the r35's achilles' heel. why would these guys risk higher temp and potential failure to reduce (minor) noise? which workshop? how much higher is tm oil temp now for street and for track?

timechaser · 9th July 2008, 02:39 AM

if the tm oil temp is the achilles heel, how to solve that? are there oil compositions which can stand the higher temp better? work better at lower temps?

vex · 9th July 2008, 02:42 AM

tm oil cooler. not available yet

Quote:

Originally Posted by timechaser

if the tm oil temp is the achilles heel, how to solve that? are there oil compositions which can stand the higher temp better? work better at lower temps?

doggiehowser · 9th July 2008, 03:21 AM

Yeap Zele/Harrison has one in the works

Wonder how much cooling you can get in the back next to the rear exhaust outlets

RTG · 9th July 2008, 06:13 AM

Was told the TM oil temp went up as much as 10 - 15°C, for road use I think its fine but for track I dunno. For zele's oil cooler I think they installed it at the "Hot" spot of our R35, wonder if it helps on oil temp. BTW where to get R35 TM oil in Singapore ? This workshop has another theory, 50% of 10-50 + 50% of 0-30 gives you 5W-40 oil, buy it ?

vex · 9th July 2008, 06:36 AM

Quote:

Originally Posted by RTG

Was told the TM oil temp went up as much as 10 - 15°C,

when fresh from a tm oil change, i hit about 109 on the nsh and 126 on track. have seen other 35 going _above_ 130. safety limit is 140. so, what do you think ? insane

vex · 9th July 2008, 06:45 AM

Quote:

Originally Posted by RTG

where to get R35 TM oil in Singapore ?

pm'd u the sources. easily available

RTG · 9th July 2008, 07:02 AM

Thanks, replied your pm.

timechaser · 9th July 2008, 09:13 AM

Thought safety was 130 - someone I know tracked monday and his car went to safety mode at 130.

vex · 9th July 2008, 09:42 AM

Quote:

Originally Posted by timechaser

Thought safety was 130

nah. yellow/red zones are above 140. like i said, tm oil temp is the weakest link. so set the large dial on screen 1 to read it. back off when it reaches mid 120s.

timechaser · 10th July 2008, 01:18 AM

Quote:

Originally Posted by timechaser

Thought safety was 130 - someone I know tracked monday and his car went to safety mode at 130.

Mea culpa - it wasnt the TM temp - which was 133 and not in the safety zone, but the engine oil temp which touched 130.

8th July 2008, 09:34 AM	#1 (permalink)
RTG GTR Register Member Join Date: May 2008 Posts: 13	R35 - Using gear oil as TM oil I know of a few owner has replaced the TM oil with 75W-140 gear oil, for the sake of lower gearbox noise. So far the only noticeable setback is a higher TM oil temp, can anyone one shed some lights on this ?

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8th July 2008, 10:47 AM	#2 (permalink)
doggiehowser GTR Register Member Join Date: Oct 2007 Posts: 416	Errr... have you compared how different the viscosity of the transmission oil is from the diff/final drive oil??

9th July 2008, 12:00 AM	#3 (permalink)
RTG GTR Register Member Join Date: May 2008 Posts: 13	I have not personally seen the TM oil but was told by the mechanic that the R35 TM oil are pretty low in vicosity, probably close to TM oil used in a typical auto trans, definitely far from differential oil.

9th July 2008, 02:04 AM	#4 (permalink)
doggiehowser GTR Register Member Join Date: Oct 2007 Posts: 416	Yeap. TM oil is almost like engine oil. In any case, why not use the original Nissan TM oil? I know even tuning houses like Amuse/MCR use original Nissan TM oil, even if they change the diff/final drive/engine oil to other brands.

9th July 2008, 02:39 AM	#6 (permalink)
timechaser GTR Register Member Join Date: Feb 2008 Location: Singapore Posts: 145	if the tm oil temp is the achilles heel, how to solve that? are there oil compositions which can stand the higher temp better? work better at lower temps?

9th July 2008, 03:21 AM	#8 (permalink)
doggiehowser GTR Register Member Join Date: Oct 2007 Posts: 416	Yeap Zele/Harrison has one in the works Wonder how much cooling you can get in the back next to the rear exhaust outlets

9th July 2008, 06:13 AM	#9 (permalink)
RTG GTR Register Member Join Date: May 2008 Posts: 13	Was told the TM oil temp went up as much as 10 - 15°C, for road use I think its fine but for track I dunno. For zele's oil cooler I think they installed it at the "Hot" spot of our R35, wonder if it helps on oil temp. BTW where to get R35 TM oil in Singapore ? This workshop has another theory, 50% of 10-50 + 50% of 0-30 gives you 5W-40 oil, buy it ?

9th July 2008, 07:02 AM	#12 (permalink)
RTG GTR Register Member Join Date: May 2008 Posts: 13	Thanks, replied your pm.

9th July 2008, 09:13 AM	#13 (permalink)
timechaser GTR Register Member Join Date: Feb 2008 Location: Singapore Posts: 145	Thought safety was 130 - someone I know tracked monday and his car went to safety mode at 130.