What kills tranny's?
07-09-2003, 06:01 PM
#17
Race Car
Oil, oil, oil, makes lots of difference in even the ease of shifting. If that means saving you from that one bad shift, it could make all the difference in the world. Also things don't wear as fast and less heat to the tranny also prolongs the life of many components in the tranny. I love redline tranny oil and will not use anything else after trying other synthetics. Its the cheapest insurance since you need less than 3 quarts.
07-09-2003, 08:01 PM
#19
Nordschleife Master
Thread Starter
</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by pearldrum944:
<strong>Driving down a gentle hill at about 60 not even touching the gas...</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Yea, No crap you were behind me... Did you see me do anything wrong? I mean honestly? I don't think I did anything that would cause a tranny to just blow up? Maybe it was a previous owner witch would suck and here is why....... my father "If I find out you were abuseing it your dead" and if it was the previous owner as soon as whoever starts rebuilding says it was "abuse" I am dead. When I clearly can't recall ever missing a shift at all or droping the clutch. EVER in that car. There simply isnt any reason to? AHHH I feel like my wallet is about to get alot lighter... <img border="0" alt="[crying]" title="" src="graemlins/crying.gif" /> And it was very light to start with.....
<strong>Driving down a gentle hill at about 60 not even touching the gas...</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Yea, No crap you were behind me... Did you see me do anything wrong? I mean honestly? I don't think I did anything that would cause a tranny to just blow up? Maybe it was a previous owner witch would suck and here is why....... my father "If I find out you were abuseing it your dead" and if it was the previous owner as soon as whoever starts rebuilding says it was "abuse" I am dead. When I clearly can't recall ever missing a shift at all or droping the clutch. EVER in that car. There simply isnt any reason to? AHHH I feel like my wallet is about to get alot lighter... <img border="0" alt="[crying]" title="" src="graemlins/crying.gif" /> And it was very light to start with.....
07-09-2003, 08:08 PM
#20
Nordschleife Master
Thread Starter
Another thing I don't understand is that gearbox always felt really tight nothing ever grinding or missing. It felt perfect then it failed. Just out of curiousity? but If I was doing 60 in 4th let off the gas and the car started to drag onto the engine is that really bad for the gearbox? thats like around 3500rpm's I think.
07-09-2003, 10:53 PM
#22
Burning Brakes
in the past, drive trains had ‘universal joints’ as the weakest link...you'd 'pop the clutch' and often watch the drive shaft scoot sideways across the street
2 hours and $25 later you were back to 'popping the clutch'
I’ll bet most of these P-car R & P fixes aren’t done with the proper VW435 tools and procedures which I’m sure leads to a very much shortened life
opins anyone?
2 hours and $25 later you were back to 'popping the clutch'
I’ll bet most of these P-car R & P fixes aren’t done with the proper VW435 tools and procedures which I’m sure leads to a very much shortened life
opins anyone?
07-10-2003, 12:42 AM
#23
Nordschleife Master
Thread Starter
I think its just not a strong design. I personaly think that a Gearbox - rearend is alot stronger for "poping the clutch". But when its all one unit I think any poping of the clutch and smokeing tires is like an instant killer of the tranny's. I think you pop the clutch on a 944 and my bet is that do it once and the tranny is done.. (not because the ring and pinion) But because it will blow out 1st gear and power it into 2nd and you are just asking for problems. I want to say if you take any porsche hard from 1st-2nd gear and when you hit 2nd pop the clutch and just power down. you will get maybe 3 times of this? because my bet is after the 3rd time the tranny is done for.
07-10-2003, 12:57 AM
#24
Nordschleife Master
Thread Starter
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Actually Jimbob we don't have sheep. Well I know when I shift I always make the gear perfectly never miss a shift and never grind them. I personaly think that 1st-2nd gear power shifting is what kills porsche tranny's the fastest. Here is why. 1st gear is set up in this direction <- ok? and so when you smash the accelerator you push the main shaft away from the gearing ->. 2nd gear is the oposite direction -> and when you smash it the main shaft goes <-. so you are basicly taking the main shaft in the transmission and yanking it both directions with alot of force. And since the 944 and 944 has all that rear weight unlike a mustang you don't spin the wheels insteed you yank the **** out of the main shaft jerking it back and forth each time you power shift 1st-2nd gear. Each gear after this isnt important because the torque just isnt there to really harm anything. There is a name for transmissions like this but I forget what they are called were each gear has a //// direction and then the next gear is like this \\\\\ ? ok I dont think you know what I mean... anyways I know a 944 tranny is like this is a 993's?
Actually Jimbob we don't have sheep. Well I know when I shift I always make the gear perfectly never miss a shift and never grind them. I personaly think that 1st-2nd gear power shifting is what kills porsche tranny's the fastest. Here is why. 1st gear is set up in this direction <- ok? and so when you smash the accelerator you push the main shaft away from the gearing ->. 2nd gear is the oposite direction -> and when you smash it the main shaft goes <-. so you are basicly taking the main shaft in the transmission and yanking it both directions with alot of force. And since the 944 and 944 has all that rear weight unlike a mustang you don't spin the wheels insteed you yank the **** out of the main shaft jerking it back and forth each time you power shift 1st-2nd gear. Each gear after this isnt important because the torque just isnt there to really harm anything. There is a name for transmissions like this but I forget what they are called were each gear has a //// direction and then the next gear is like this \\\\\ ? ok I dont think you know what I mean... anyways I know a 944 tranny is like this is a 993's?
07-10-2003, 01:29 AM
#25
Drifting
Yeah, I didn't see anything go wrong and you drove like normal. I just thought you missed the road and were going to turn around. I didn't know we would have to push the car to get it turned around...
07-10-2003, 07:20 AM
#27
</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by johne:
<strong>I've never heard that before. So what kind of revs are you talking about 3k 2k 1k .5k?</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">On an S2 I'd say below 2.5k
<strong>I've never heard that before. So what kind of revs are you talking about 3k 2k 1k .5k?</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">On an S2 I'd say below 2.5k
07-10-2003, 09:07 AM
#28
Racer
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actually the part about the low revs is true, what happens is that when lugging the engine you have too much resistance and you are beating up on the pistons by creating excessive pressure that it is not able to release fast enough and it can cause what is called "piston slap", even in my semi truck which has a range of 1000-1700 rpm it says right in the manual to not let the engine below 11-1200 in high range. Also at lower speeds in high gears you are creating more force on the transmission, just like on a 10 speed bike if you take off in the highest gear you can hear the tension on the chain because you are not multiplying the torque enough and create a lot of resistance, just think aboout a wore down clutch that does fine in the first few gears but when accelarating in 4th or 5th you get slippage.
07-10-2003, 12:56 PM
#29
Drifting
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I don't know if "one" clutch pop in first will kill the tranny, nor to I think "two or three" 2nd gear pops will do it.
I say this because I have poppped the clutch in first about 10 times and sometimes pop the clutch in second (for that fun 60 klms/per hour wheel squeel). That was when I first got the car, haven't done it in the last year.
Tranny/clutch seems fine so far.
I think the biggest killer of clutches is sitting on hills with the clutch half out, waiting to go or slowwwwwwly letting out the clutch in first (to creep in traffic of something). When I got my car back from the mechanic, he drove with me for a bit and I was sitting behind someone on a hill and kinda had the clutch 1/4 out, waiting to go.....I'd push it back in, creep it back out some and kept doing that. He said that wore about 3-weeks of my clutch off in that 15 seconds. He said it should either be all or nothing. Either the clutch pedel should be on the floor or should be let out fully - never sponge it or give it gas while it's slowly being used.
944S Boyeee
I say this because I have poppped the clutch in first about 10 times and sometimes pop the clutch in second (for that fun 60 klms/per hour wheel squeel). That was when I first got the car, haven't done it in the last year.
Tranny/clutch seems fine so far.
I think the biggest killer of clutches is sitting on hills with the clutch half out, waiting to go or slowwwwwwly letting out the clutch in first (to creep in traffic of something). When I got my car back from the mechanic, he drove with me for a bit and I was sitting behind someone on a hill and kinda had the clutch 1/4 out, waiting to go.....I'd push it back in, creep it back out some and kept doing that. He said that wore about 3-weeks of my clutch off in that 15 seconds. He said it should either be all or nothing. Either the clutch pedel should be on the floor or should be let out fully - never sponge it or give it gas while it's slowly being used.
944S Boyeee
07-10-2003, 02:44 PM
#30
Nordschleife Master
Thread Starter
944s boyeee do you have lsd? in my previous thread about how the main shaft gets jerked around without lsd I don't know if you would get anuff force to make this happen with the same amount of pressure.