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

[PaulReeves.com - GPOWER.TV]

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.

Can you move it to my Signature Line below my track times then if you still can somehow?

As it was wrote out specifically that I won't get back again

[PaulReeves.com - GPOWER.TV]

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

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.

But would that be the KTF-1 CVT Diagnostics? Or the old NS-2 CVT Diagnostics???

Or it doesn't matter when reading the CVT?

[Sikahalv]

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

Andrew

[Nightcrawler]

Can you move it to my Signature Line below my track times then if you still can somehow?

As it was wrote out specifically that I won't get back again

Sorry Paul it is gone. And to be honest, and no offence meant, but no-one cares what else you drive - also, your sig is already too long - I almost edited out your silly "TBA" lines as well.

[sonicii]

But would that be the KTF-1 CVT Diagnostics? Or the old NS-2 CVT Diagnostics???

Or it doesn't matter when reading the CVT?

KTF-1 and NS-2 are fluids.. also NS-2 is newer. NS-1 was used on the early pushbelt CVTs, NS-2 on the mid to late 00s, and NS-3 is used on the current range.

I would expect if the consult3 can read and communicate with the TCU, then it will work regardless of what type of fluid the CVT runs.

[sonicii]

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.

Just saying you can't block the fluid flow from the cooler like you can with engine coolant. you would need to bypass the cooler to still allow the fluid to flow back to the pan, otherwise you would create an enormous amount of fluid backpressure in the transmission

[Ben C34]

Just saying you can't block the fluid flow from the cooler like you can with engine coolant. you would need to bypass the cooler to still allow the fluid to flow back to the pan, otherwise you would create an enormous amount of fluid backpressure in the transmission

Yep.

If you look at how trans cooler thermostats work they don't block the flow, they just allow it to bypass the cooler. Its exactly the same as an engine oil cooler thermostat. They don't block the flow of engine oil. That would be silly

[austingtir]

Just saying you can't block the fluid flow from the cooler like you can with engine coolant. you would need to bypass the cooler to still allow the fluid to flow back to the pan, otherwise you would create an enormous amount of fluid backpressure in the transmission

As said it just does not work like that if you use the correct parts which I listed. If you do your own research you will understand this its pretty simple stuff really.

Regarding the turbo CVT. Nissan tested this cvt behind their v8 engines of hte era (1990's) and obviously the 3.0 turbo. I would suggest this CVT can take about 350 or so hp but the thing is gearboxes are usually rated in torque output. Once you turbo a 3.5 you are playing with fire with this CVT behind it. The heat generated by the extra torque will kill it sooner or later.

Again I still say anybody that turbo's one of these is nuts. I dont care what anyone else thinks.

Edited April 26, 2015 by austingtir

[sonicii]

Regarding the turbo CVT. Nissan tested this cvt behind their v8 engines of hte era (1990's) and obviously the 3.0 turbo. I would suggest this CVT can take about 350 or so hp but the thing is gearboxes are usually rated in torque

I would tend to agree.. considering Nissan use a normal pushbelt CVT behind the same 3.5L engine in the Maxima/Murano (sure, slightly detuned). and then they specifically say the toroidal CVT was built to handle high torque, I would say it could handle quite a bit more than the maxima/murano CVT before 'throwing in the towel'.

That said, if you exceed its limits, it will get messy fast! and there is no option to 'rebuild' it to handle more torque like you can with standard auto transmissions.

[scotty nm35]

The early CVT's had only one drum in the fluid, which meant the higher drum wore quickly if the fluid was old or the fluid level was low. The newer CVT's, both drums are in the fluid, which makes them much more reliable. This is essentially why the early CVT's got a bad name.

I spoke to my Nissan mech buddy last night, there is definitely a fluid timer which changes certain functions as the fluid deteriorates. This can be reset from the Consult3 as I thought.

[t5iv]

I spoke to my Nissan mech buddy last night, there is definitely a fluid timer which changes certain functions as the fluid deteriorates. This can be reset from the Consult3 as I thought.

That's it Scotty. Pretty sure it states that in the workshop manual - which I can't find now

[sonicii]

I spoke to my Nissan mech buddy last night, there is definitely a fluid timer which changes certain functions as the fluid deteriorates. This can be reset from the Consult3 as I thought.

Interesting.. you don't happen to know what it changes?

Anyone here in NQ with a Consult3 clone? Or know of any C3 clones that can do this and not cost $1k? I flushed the fluid on my wife's J31 CVT a couple of months ago, and if this is correct, I probably should have the fluid deteoriation counter reset!

[bluenoir]

Why on earth would you want to track/push hard on a GT-8 in the first place?

Earlier CVTs are known to have issues when thrashed hard.

If you want to race/track/drag a car, at least get a 5sp auto or 6sp manual.

V35s are named with GT for a reason - grand touring is different without the "R"! Of course you can have a heavy foot and have fun around the corners or keeping up with the traffic, but I would never track a GT-8.

[scotty nm35]

If you want to race/track/drag a car, at least get a 5sp auto

Don't, it will overheat and ruin your clutch packs.

[PaulReeves.com - GPOWER.TV]

Why on earth would you want to track/push hard on a GT-8 in the first place?

Earlier CVTs are known to have issues when thrashed hard.

If you want to race/track/drag a car, at least get a 5sp auto or 6sp manual.

V35s are named with GT for a reason - grand touring is different without the "R"! Of course you can have a heavy foot and have fun around the corners or keeping up with the traffic, but I would never track a GT-8.

And that's the way I am keeping it Francis.

Mainly Highway driving & the occassional 2-3 laps to set my best track times.

I seen what happened when you do 6-7 laps at a time!!! Wasn't good for the health of the box at all

Is there a service kit available for the Extroid anyway? Ie Gasket, Filter & O-Ring altogether in a kit???

I went to CVT.co.nz & not one part is for the Extroid!!!

[Leroy Peterson]

Yeah service kit is is sump gasket, o-ring and oil. If there is oil weeping from the side of the box then you'll need copper washers for the banjo bolts.

Check my for sale thread a few pages back for part numbers

[PaulReeves.com - GPOWER.TV]

The early CVT's had only one drum in the fluid, which meant the higher drum wore quickly if the fluid was old or the fluid level was low. The newer CVT's, both drums are in the fluid, which makes them much more reliable. This is essentially why the early CVT's got a bad name.

I spoke to my Nissan mech buddy last night, there is definitely a fluid timer which changes certain functions as the fluid deteriorates. This can be reset from the Consult3 as I thought.

But would the PV35 have a fluid deterioration sensor?

Has anyone got a GT-8 & confirm they had theirs reset after the flush???

As the way I am reading this page, is that its mainly in the J31 (Pushbelt) CVT models that you can have it reset?!

[PaulReeves.com - GPOWER.TV]

+1 to MV. theyre currently sending me a shift kit for the RE4.

cvt.co.nz do sell gear too, but they werent interested in my business once i said i wasnt buying oil from them.

31526-5P009 (O-Ring)31397-5P000 (Gasket) (someone will need to confirm Y34 is same as V35. it should be same, but Y34 is "6 speed" CVT so small chance is different sump)

Exactly the same thing that is happening with me!

CVT.CO.NZ - don't want to help you out unless you're buying oil from them for the Extroid!!! How lame...

You still have the gasket & o-ring for the GT-8 CVT Lee-Ham?

[Leroy Peterson]

You still have the gasket & o-ring for the GT-8 CVT Lee-Ham?

yes i do. i think ive got them for sale for $45 for both + postage.

[PaulReeves.com - GPOWER.TV]

Is there a Filter inside the CVT that can be changed as well?

Like Auto's have or just the O-ring & that's it!?