I have yet to see anything noting the characteristics of our transmissions so I thought I would make a few posts.

Our transmissions are a 4-Speed Automatic (for turbo models) and other automatic transmission series models. They feature a Hydroleic Torque-Converter featuring a lock up feature to act sort of like a clutch at the correct speeds, locking the transmission and the crankshaft together.

We also have a few options with our transmissions. We have a switch that has the "Econ/Sport" functions. What this does is allow our car to act a little bit more economic, if economy is selected, and sporty, if sporty is selected. In economy mode our cars will shift as soon as possible to save on gas since the extra power is not needed. Also, our cars will not downshift as viggoriously. In sport mode our, our cars will shift as late as possible to allow the most power to be delivered to the car. This means that we our cars will rev higher, producing more power. Also, they will downshift when needed to depending on throttle position, speed, etc.

We also have a mode called "Winter Mode" which we all know of. When pressed, the lights will go off on the switch and "up" arrow will be displayed. What this does is to put the transmission in 3rd gear. Since we have a torque converter, it slightly acts as "slipping the clutch", as this is intended to not allow as much power to the wheels in wet/icy conditions to reduce the chances of slipping.

A few other things to note about our transmission

Shift Points:
Downshift to 1st Gear - Any speed UNDER 25-MPH
Downshift to 2nd Gear - Any speed under 65-MPH
Downshift to 3rd Gear - I have yet to go this fast XD.

Torque Converter lock up Points
1st Gear - N/A
2nd Gear - N/A
3rd Gear - Anywhere above 35-MPH
4th Gear - Anywhere above 50-MPH

Gear Selection:
P - Park. Use to park. Locks up transmission to not allow car to move.
R - Reverse. 1 Gear only, used for reverse
N - Neutral. No power to wheels at all. Allows car to be turned off and on in this position
D - Puts it in drive, allows the TCU (Transmission Control Unit) to control which gear it is in, and when to shift the transmission
3 - Puts the car in 3rd gear. Allows downshift to lower, but will not allow upshifting to 4th. This is also the only way to have the torque converter to lock up above 35-MPH. This also keeps the gear in 3rd gear when it the throttle is off to help with engine braking.
L - Low Gear. This puts the transmission in the lowest gear possible. Please note the speed selections above. Mainly this will shift into 1st and 2nd gear, and keep it in that gear until upshifted manually. Torque Converter is not available in these gears, as I have noticed. This can also help with engine braking, but to a more extreme level. The car will rev higher and slow the car down a bit more extremely in comparison to "3".

Side Notes:
Rev Limiter on car is at 6500-RPM.

Comments? Suggestions? Will edit with useful Information.

Side Notes:

Answer:

 

Saved for extra post if needed.

 

Huh, interesting fun fact I guess. Never really took the time thinking about a transmission before. I always find the transmission like a pandora's box, always curious as of how it works. Someone told me that it has no real gears, but something like a series of plates and clutches, or something.

 

I have a question.

Can the Automatic transmissions be modified? Is there software available to allow higher revs/shift points? Does it have the ability to have a line lock added?

 

I have no idea :P. These are some of the characteristics that I've noticed. I don't know much about our transmissions though.

 

Many have tried to Mod the transmissions(Level 10) but most have not been able to.
I am not sure on a line lock either.

 

Isn't a "line lock" something that would lock the brakes ON so the car doesn't roll forward ?? It isn't really something that has anything to do with the transmission ??

SLP Performance Line Locks M25000 - SummitRacing.com

 

the sport mode on the 850Rs makes the transmission run very aggressive making the car fun to drive. it accelerates faster with a faster pick up. l tried my friends 850 turbo today on the sport mode and it wasnt as aggressive as mine. why is that? is there any difference between the 850 turbo and 850R?

 

From one car to another there may or may not be a difference. It could be the quality or age of the parts, quality of the fuel, condition of the injectors, vacuum leak, tire diameter ... the list goes on. The "R" should have a little more get up and go all other things equal in a perfect world. I think the R's computer lets the turbo build 1psi more boost and the engine is rated at 15hp over the regular 850T.
There also might be modifications that aren't readily apparent that would give one a bit more of an edge.