Cvt Extroid (lloyd, Toroidal) 8-speed Gear Box Overheating & Servicing On 350gt-8 (pv35) Sedan

[PaulReeves.com - GPOWER.TV]

I am a grandpa driver, economist record holder for GT-8's with the 'Hypermiling Technique' as was previously shown on Mythbusters!!!

A Full Tank can drive 1,159kms running on 6.9L/100kms Consumption...

[Guest]

Yeah good try Rat (1984 Chinese Animal).
That's why my last driving crime on the road was on 1st Dec 2010!!!
What's yours??? Lol

Just because you don't get caught doesn't mean that your not a d*ckhead. Props for the insult too man, calling me by my Chinese animal... ouch

Jimmy, ever since you joined SAU back in January 2015, I always had this feeling you were a Chinese Rat... I just didn't have the heart to say anything... I'm glad I'm not the only one who feels this way.*

*Sorry Paul, but your comment towards Jimmy has got to be the most 'odd' insult I've read in years on the interwebs... +1 for ingenuity though.... Chinese Rat, lol...

With all do respect Paul, Jimmy is absolutely right - leave the races for track days, and not on the streets... Unless you enjoy traffic light wars 0-60 km/h....

Edited April 13, 2015 by Sikahalv

[MDCAT]

What's wrong with the traffic lights wars ?? lol

[PaulReeves.com - GPOWER.TV]

My VIN Placard states: RE0R04A for the trans.

Axle: RC36

Plant: M

[Guest]

What's wrong with the traffic lights wars ?? lol

Many enjoy traffic lights wars, I think you read it incorrectly

Edited April 13, 2015 by Sikahalv

[t5iv]

Enough of the w**kfest and comparing how big everyone's d**k is. Fact of the matter is that these cars are slow. They take a fair bit of work to get any decent power out of. The DE has a brittle bottom end. The 37VHR actually has some sexy as f**k pistons and rods in there. This not the place to talk about street racing and carrying on like idiots - boost cruising is that way.

Listen to what the guys who have been there and done that say. Learn from them. Quit the B**tching and moaning and grow up. When Andrew gets back from holidays, he'll probably remove 3/4 of the crap in here.

[PaulReeves.com - GPOWER.TV]

Ok some say I need to reset the TCU including the workshop manual after a trans flush on a GT-8.

But one says why.

I also ask why if my gear ratios are still the same & not corrupt?!

[sonicii]

Ok some say I need to reset the TCU including the workshop manual after a trans flush on a GT-8.

But one says why.

I also ask why if my gear ratios are still the same & not corrupt?!

Not sure what needs to be 'reset'. Other CVT equipped Nissan vehicles have a 'fluid condition' counter stored in the TCU which determines when fluid should be changed based on how the vehicle is driven rather than just km alone. This figure is supposed to be reset when fluid is changed, so perhaps the GT-8 has something similar.

No idea how gear ratios could 'become corrupt', these are hard coded and not 'learned', and they only apply when you are in manual mode anyway.

[t5iv]

Not sure what needs to be 'reset'. Other CVT equipped Nissan vehicles have a 'fluid condition' counter stored in the TCU which determines when fluid should be changed based on how the vehicle is driven rather than just km alone. This figure is supposed to be reset when fluid is changed, so perhaps the GT-8 has something similar.

This. Else is sets up contingencies for old fluid which causes problems.

[PaulReeves.com - GPOWER.TV]

When the full flush is done how can it setup contingencies when the gear changes are hard coded as one says?

I see no point getting the TCU Reset as it can't be done by anyone anyway, to what I have been reading?!

[sonicii]

I highly doubt there are any 'contingencies' with old fluid. I just know some other CVT equipped vehicles have a fluid life counter in the TCU and it just flags when a fluid change is due. The idea is it can flag fluid change intervals with more accuracy than just KM, as 60,000 highway km is much nicer on transmission fluid than 60,000 city km.

This counter may not even exist in the V35 CVT TCU?

[scotty nm35]

I haven't had a CVT here to put on the consult3, but if there are such maintenance options, that would be the only way to reset it I imagine. Would be interesting to see the TCU diagnostics for these...

[PaulReeves.com - GPOWER.TV]

I haven't had a CVT here to put on the consult3, but if there are such maintenance options, that would be the only way to reset it I imagine. Would be interesting to see the TCU diagnostics for these...

Do you work at a Transmission place in Melbourne Scott?

Like if I brought my CVT PV35 over to you, you could connect it up to your Consult3 Software to check my TCU of the CVT?

[PaulReeves.com - GPOWER.TV]

Check this Infiniti G35 Coupe (633rwhp) beat a stock Nissan GTR R35 in a rolling start drag!!!

[austingtir]

Just bear in mind with the additional trans cooler you were talking about that this trans (and more importantly the oil) was designed to operate at 80degrees or so. The fluid is far more likely to allow slip once it goes outside a certain temp range which could damage the toroids among other things. I have seen the testing documentation on this from when they designed the extroid cvt's and Nissan was very specific on pointing this out in the doc!

Not sure if they have a thermostat built in... (they probably do) so yeah an additional cooler will help you alot at trackdays but if there is no thermostat and the temp is not properly regulated it could cause as much damage as not having one!

B&M do a cheap trans coolers and Derale to good 80deg thermostats.

And yeah your nuts if you are even entertaining the thought of turbcharging this car with this transmission!

[sonicii]

Not sure if they have a thermostat built in... (they probably do)

the cooler lines are the path the fluid takes on its way back to the pan. you can't restrict or block this flow or you will cause a lot of problems. They would have to include some sort of internal cooler 'bypass' to control temperature.. they might have something like this if fluid temperature is very critical, but I have never seen such a thing in a standard transmissions before.

[austingtir]

the cooler lines are the path the fluid takes on its way back to the pan. you can't restrict or block this flow or you will cause a lot of problems. They would have to include some sort of internal cooler 'bypass' to control temperature.. they might have something like this if fluid temperature is very critical, but I have never seen such a thing in a standard transmissions before.

Not sure what your getting at. If you look at where the lines are routed they come right out the front of the car past the radiator and behind the bumper into some bulbus thing which is probably either a filter or a thermostat or something... I forget and I cant look into it further as I sold my car recently.

The B&M cooler has its own inbuilt bypasses to allow oil to bypass when its cold I have no idea how it works but thats what they claim.

I fitted the B&M cooler and derale thermostat to my own E55 AMG and it works perfectly (bypassed stock trans cooler inbuilt to radiator which is a near identical setup to the GT8)

There will be a minor difference in flow (due to the cooler itself and lines) but IMHO certainly not enough to make any difference whatsoever to this CVT trans if you actually look at how a Derale H thermostat works you will understand this. The operating temp is still the most critical part of the gt8 oiling system hence why there is multiple accounts of this car spitting the dummy when you take them on track... you can watch the best motoring video to see the most glaring account of this.

Edited April 25, 2015 by austingtir

[PaulReeves.com - GPOWER.TV]

Just bear in mind with the additional trans cooler you were talking about that this trans (and more importantly the oil) was designed to operate at 80degrees or so. The fluid is far more likely to allow slip once it goes outside a certain temp range which could damage the toroids among other things. I have seen the testing documentation on this from when they designed the extroid cvt's and Nissan was very specific on pointing this out in the doc!

Not sure if they have a thermostat built in... (they probably do) so yeah an additional cooler will help you alot at trackdays but if there is no thermostat and the temp is not properly regulated it could cause as much damage as not having one!

B&M do a cheap trans coolers and Derale to good 80deg thermostats.

And yeah your nuts if you are even entertaining the thought of turbcharging this car with this transmission!

Lol, I was never super or Turbo Charging mine!!!

Is the Derale H you're talking about the bulbus thing that is connected at the front?

Are you saying that the B&M kit won't do much cooling when it goes to the track?

If it won't, do you know which company of brand could supply me a gauge with a sensor that would not stuff up anything when installed & let me read its temperature live, to save myself the hassle by overheating it???

[Nightcrawler]

I have left the banter in here as it has been generally acceptable, if not borderline. But consider this as a first and final warning, any further personal slander/affray (especially bringing race into it) and I will start editing heavily and handing out bans.

Also Paul, I have removed your car list from your profile - it makes every post you make ridiculously large when viewing the forums.

[scotty nm35]

There is definitely a turbocharged CVT getting about locally, and it's still running fine afaik. The box isn't weak, just misunderstood.

Do you work at a Transmission place in Melbourne Scott?
Like if I brought my CVT PV35 over to you, you could connect it up to your Consult3 Software to check my TCU of the CVT?

I thought you had the RE4 for a minute, but yes, if you can drop in with it I could check out the diagnostics Nissan use to service the CVT. I don't specialise in transmissions, but I have shift kitted many Nissan auto boxes.