Isn't this ShiftPlus thing basically what Trans ams/Formulas have stock?


i also thought the performance mod did the same thing as the B&M? can someone please elaborate if there is any difference between the GM performance mode and the B&M / JET? thanks.

carl

 

I put a Shift Plus on my brand new trans. After about a year, the trans started to slip very badly, and constantly bounced the rev limiter when shifting. Took it off, changed fluid, and all is well.
Just give it time. Pretty soon those high line pressures will crap out your clutches and bands. Same reason I sold my B&M internal kit. It basically raises the line pressure. Do a search, you will find many people who have had trannys crap out on them because of this.

As far as B&M advertising it won't hurt your tranny ? Dur ! Who the heck is gonna sell something and state "This producst will cause excessive ewear and will almost likely damage your transmission" ?

-Shannon

 

Is the hypertech firmed up shift thingey just as bad with the hpp3?

 

i have a shift kit in my 97 and have had it for 2 yrs. when done right when you are driving normally the tranny will shift normally i dont know it is there till i get on it and i get one hell of a second gear scratch
shift kit is the way to go

 

Ive always been told that what kills transmissions is heat. Im a firm beleiver in that. A good tranny cooler and fluid are musts for anybody. Raising line pressure reduces slip. Sure, excessive use I guess can wear out your tranny. So will hard driving.
Im not sure what the performance mode button does on the Firebird, but I do know the Camaros are in performance mode all the time thats why they dont have that option. So the ShiftPlus is something completely different.

 

Yes, excessive heat kills trannies.

Too much line pressure kills trannies. Be very careful with the Shiftplus. It has killed lots of trannies.

The performance mode is not quite the same as the Shiftplus. Many threads on this. Do a search.

Camaros are not in performance mode all the time. That is a myth and not why they do not have the switch (just a difference in the way the two cars are marketed-Pontiacs always get the gizmo stuff ).

 

I was gonna call BS on this too, I've driven both Camaro and the Formula with Performance on shifts WAY harder and has totally different shift points.

 

This thread is quickly turning into a whole bunch of Mouth Diarrehea.

Shift Kit Shift Kit Shift Kit...... WHY? So ur forcing MORE Line pressure through ur trans in order to make your trans shift harder. Wow, thats the most ghetto idea I have ever heard and seen in order to increase "performance"

B&M shiftplus boosts line pressure through PCM controls. While this is still not the safest thing to do to a trans, it is a more subtle change. However, I don't see how this is helping u LAUNCH

Too many people are under the misconception that shift kits improve the life of ur trans. Can anyone explain to me how it does that? Didn't think so.

The only safe and effective way to boost tranny performance through shifting is a complete rebuild. Upgraded clutches, pump rotor, rings, vanes, servo, valves and high pressure springs. That way ur trans will shift and hard and crisp, safely.

 

Very well said, Wheelman.

 

Interesting thread.....What about the SLP Shift Module?, since this is connected to the PCM, is this doing basically the same thing, raising the line pressure? and bad in the long run?

BadRag

 

pretty much anything that increases shift firmness via PCM is increasing line pressure, which is BAD!

 

That's a pretty broad statement. The pcm normally increases line pressure at a linear rate and based on sensor input (not just on/off like the Shiftplus). No way would you bark the tires on a 1-2 shift without an increase in line pressure. You need increased line pressure under certain high load conditions to control internal slippage. Subtle increases as those with the HPP and the factory performance shift will not harm your tranny.

 

Good point Shoebox, as always my good man.

Line Pressure is one of those "too much of a good thing" ideas. U need a proper amount of line pressure in order to shift the tranny without slipping. However, going to extremes to increase line pressure raises temperature, as well as reduce the life of springs and clutches, two of the most vital components of an automatic trans.

 

Wheelman I am having problems understanding what your trying to say.
I have a built 4L60E with a shift kit, I have a stall converter as well and the shifts would be kinda soft without the shift kit.
My tranny shifts nice and crisp and does so without manipulating line pressure through the PCM. Its done through the valve body where I believe it should be done, not the PCM.
As I said, its your car and you can do whatever you want to it, I would never put one of those line pressure boosters on my car.

But a shift kit, hell yes.

 

A shift kit adds shims and spacers in order to make the Spring compress harder and tighter, thus creating a harder shift right? How is that done through the valve body?

If a trans is built properly, than u CAN adjust line pressure accordingly through the PCM. Just cause u can adjust something through the PCM, doesn't mean it's done improperly.

U can adjust timing in the PCM, but that doesn't mean u would give ur self 60 degrees of raised timing right? So if ur adjusting line pressure, u can do it properly without doing it excessively.