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Me thinks the GTM one day turnaround is a core exchange.
The Uprev modification increases line pressures by increasing expected power
parameters. It does affect downshift response, by needing more throttle input.
Im going to revert mine back to stock.
Mine was not a core exchange, they did their magic on my own valve body. If you do a core exchange there is a little more involved with getting the ecu to recognize the exchange valve body.
There is more involved than increasing line pressure. There is a good explanation on the GTM website
+1 on the timeline. They told me 1-2 days for them to do it all in house by them. Total cost jumps to $2200 out the door though through them because of the $600 for the flash kit.
That and ATF temp. When you do it at Infiniti, they have to wait until the temp of the fluid is between 98-104 degrees to do it accurately with their equipment.
Originally Posted by TVPostSound
40C or 104F OR LESS!!
Not between x and x!!!
Originally Posted by Modme
Actually, FSM states around 40c. Not more, not less. The fluid level is very sensitive to temperature change. So you dont want too much less than 40c either.
I had a nasty trans fluid leak not too long ago due to one of the hoses (from my Stillen Tranny fluid cooling system) not being clamped properly at the radiator. I got it fixed, but the tech at Infiniti told me when I bring it by to have the ATF topped off, they would more than likely have to keep it over night because they can only do it when the car is within the temps I stated above (98 - 104 degrees Fh). I'm thinking that's pretty accurate since it came from the Infiniti techs themselves...
Actually, FSM states around 40c. Not more, not less. The fluid level is very sensitive to temperature change. So you dont want too much less than 40c either.
Any idea how much HP and TQ the AT Tranny can withstand after the VB Upgrade?
The 7AT (Jatco JR711E) is also used in the M56, so at the very least you're looking at about 350hp/350tq at the wheels stock. If the VB kit bumps that by another 30-50% or so, then you're looking somewhere in the neighborhood of 400-500hp/tq.
No problem. Keep in mind though, I'm just guessing if it's 40-50% increase. But judging from this review, and what Transgo/GTM did with the 5AT valve body upgrade, it's a fair assessment. A lot of 350z are running the 5AT VB upgrade and TT with no problems.
Im getting a VB mod done on my 5AT next Monday/tues along with a Berk HFC. SpecialtyZ will also be giving it a tune. I am not sure if they are going to use the Transgo kit or something else. I will try and make a video of the shifting for those who are interested
03-05-2013, 09:10 PM
*AUTOMATIC TRANSMISSION*
