I saw someone posted this....

Ok a VB mod is when they modify the valve body of ur auto tranny to make it shift quicker.
This is taken right off the site,.....
stock upgrade-Improves shifting to extend tranny life without sacrificing a comfortable ride.

street/strip- greatly quickens 1-2 shift and slightly quickens 2-3 shift to improve tranny life(especially on vehicles with modified engines) Good for everyday driver/weekend racer looking for sreetable performance.

Race-Very hard 1-2 shift. Car will most likly "chirp" wheels under hard accelertation. Hard shifts will be noticed at all times.
The cooler helps to keep the trans. fluid cool,because the Faster shifting generates more heat in the clutch packs of ur auto tranny. We have a small trans. cooler built into our raditors. What they do is tap off the lines.Then put the bigger more efficient cooler somewhere that its gonna pick up cooler outside air.Then they run new lines,and they're done. Altogether my VB mod,cooler,and installation cost $448,and its well worth the money.

Where do I get the stuff to do this and can I do it myself? How much would this alone improve the 1/4 mile and very important will it void my extended warranty? Is it really better for the transmission? Thanks!

 

I guess if you are wanting to go all out you should get the last one, but then again why not just get a 6 speed? Also, I'll take my chances with Nissan's engineering on the tranny rather than some performance shop's, unless they're going to give me a 36,000 mile warranty as well

 

I have asked these same questions quite a few times. I would recommend sending a pm to juice because he has this on there. One of the older .org guys who seems to be very knowledgeable and I cannot seem to remember his name feels that the "drop resistor mod" is the better alternative. Some people think the vb mod isnt as good because it is always working. Most people like the way the auto shifts under normal operation. The drop resistor mod makes the tranny shift with full line pressure and only under WOT. Plus it is cheaper. I have been reading alot on this site (just dont post alot) and this seems to be the better one. Check around!

 

http://forums.maxima.org/showthread....ghlight=vb+mod

http://forums.maxima.org/showthread....ghlight=vb+mod

http://forums.maxima.org/showthread....ghlight=vb+mod

http://forums.maxima.org/showthread....ghlight=vb+mod

http://forums.maxima.org/showthread....ghlight=vb+mod

Read those and let us know if you have any more questions.