Quick question...

If I manually shift my auto like 1-2-3-overdrive4, is it ok for the tranny? Will it break something? whats the deal with it?

becuase I was driving like this all day yesterday, and ended up actually getting a speeding ticket, cusae its a huge difference from just letting it shift by it self. its just much faster.

 

I agree. What's fun is to leave it in second when you're driving around town at lower speeds, then when you put the pedal down it INSTANTLY jumps up and goes, makes a world of difference. I noticed I have a horrible "lag" time when I let my tranny do the work.

I don't think it hurts anything. I've heard some say it's even better for it....

 

won't hurt the tranny....i did it all the time. i have never let my trannies shift themselves. now i got a full manual th400 and it's fun

 

Just be carefull with the stock shifter. I once went right on through to reverse. I didn't brake anything, but it was a thrill locking up the tires at 40mph.

Ron

 

only thing thats bad about it is the cable that connects the shifter to the tranny. i ended up braking the cable and cost me 60 bucks and 15 min to fix. the guy at GM told me if im gonna keep doing that, im gonna need to get a aftermarket cable cause they are "beefier" ... i dont really believe him.. but mine did break, but i cant say its from shifting it either.

 

Eek!

 

haha yeah that would be brutal!
just throwing it in reverse
Today was cool though, I did it agian, I was a stop sign
I threw it into first, hit the pedal... waited until 5-6g`s shifted to 2nd, man its great, its like 141234321 times faster!

 

Shifting the auto manually has to hurt the tranny if you have alot of power. My friend with an LS1 (auto) is on his 4th tranny. We just found out yesterday that his tranny mount broke.

 

be careful, it does. i got my car with 68,000 miles on it 2 years ago. now it has 98,000 miles on it and the tranny has been slipping for about 8,000 miles. just had to put a new one in yesterday. if you do it only once in a while, its all good, but watch yourself if you do it a lot. i would also recommend a tranny cooler and transgo shift kit. both are GREAT additions to the 700-r4.

 

i think it is the latest issue of GM high tech performance that says it is bad for the tranny. it is the article where they put a TransGo shift kit and a Vigilante torque converter in their purple Z28. the guys said in the article that when you manually shift the tranny doesnt build as much line pressure somehow and when it shifts it doesnt have enough line presure to engage the clutches properly and you will burn the clutches. i dont have the article on my right now but i will soon. check it out.

 

clutch packs, clutch bands, and my TC are all what i burned up, so that sounds right.

 

Hurts nothing(unless you over rev the engine). Done this on every tranny I've had. Never burned one up yet. Unless you have a 'manual' valve body installed, you really can't manually shift it. All you can do is hold it in gear longer than the tranny would do automatically. If it was really manual, when you shifted for 1-2 2-3 or 3-4 it would shift regardless of rpm--too low of an rpm could burn stuff up. Also, if you rev it real high it will shift anyway(done this before from excessive wheel spin). Somewhere past 6000rpm it shifted from 1-2 while the shifter was in 1st.

 

The only time that upshifting automaticly would hurt anything is if the intermediate/reverse boost valve is on the small side (.262 or smaller) this would make the shifts at WOT softer than if you left the lever in the "D" position. In everything I build I use the .296 int/rev boost valve, this gives firm WOT shifts in 1st or 2nd gear.

 

don't all the guys on the track manual shift?
don't most, if not all drag car (pro stock and stuf) us automatics?
don't they make a B&M shifter so you can only shift 1 gear everytime you drive that **** foward?
i always go from 3rd into OD(4th) just about every day i drive that car to get more "ummff" and if i pull up to a light and there is a car next to me that wants to race then that puppy goes into 1st. if you don't do that then when else will you use 1st gear?
biker

 

Its not faster shifting like that, you could have it shift at 5 g's in drive too just push harder on the gas lol. I wanna see what kinda mpg u get after shifting like that through every gear. If u want it to shift a little higher and drive at higher rpms around town why dont u just get gears.

 

The only real advantage in putting it in first gear when racing is if u want to lets say upshift it to second at 5,500 rpms cause u did a cam swap and u got more top end now. Other wise in drive it would shift at its stock setting at 5k.

 

today I gave it a shot, to see how far I can push it to go..
I managed to get her up to 120km/h at 2nd gear at about I dunno 4-5 g`s probley, I could of pushed it and got it into 140km/h if I wanted in 2nd gear, but I just didnt wanna risk it.

 

My tranny slips b/c the previous owner used to do this all the time. Whenever Im traveling high speeds and punch the gas it slips into the next gear, the engine revs really high and then the car jerks when it finally catches. Once or twice the rpms went into the red cause of this. How did redlining hurt my car. thanks.

 

Redlining the Engine doesnt hurt the tranny. e.g.
An engines redline has nothing to do the the transmission's.

Manually shifting will only hurt the trans. if you do it "incorrectly", just like shifting a MANUAL trans, the AUTO trans has clutches too, and when shifted inproperly can cause slippage and burn up those clutches. Same principle, different effects. It can also damage other parts of the trans as well.

Manually shifting at WOT is 99% safe as long as you dont let off the gas when you shift. There is no reason to do this unless your engine automatically shifts itself before your engine runs out of breath (...."peaks out") somtimes with the 700R4 shifting slightly out of your peak can help the 1-2 shift because of how far the gearing is apart. on stock engines it doesnt help crap though, only modified (induction modified) engines.

Im not an expert nor do I claim to be, but I DO know manually shifting an auto is not bad for it when done correctly. Do some SEARCHES the subject has been breached before.

 

good call. i left out the fact that i would let off the gas when i shifted with my previous tranny.

 

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Either you read that wrong, or the guy that said that is a doof. Putting the shifter into a lower gear (1st and 2nd) INCREASES line pressure. When the shifter is put in 1st and 2nd, D2 fluid acts on the Reverse boost valve for the sole purpose of increasing line pressure to handle the increase load. On top of that, the TransGo kit has a firmer pressure regulator spring for increased line pressure right off the bat. If something happened to that tranny, it wasn't from manually shifting it.

 

I don't see how it could hurt it. I have known plenty of peopel that do it. works fine, doesn't cause any problems cept maybe line breakage depending on the age of it. but thats cheap. It might be THOUGHT that doing that on tranny's breaks it cause you ve had it persoanlly happen, but were they old tranny's with high mileage?