915 gearbox: Can you handle the truth ?
10-17-2011, 07:18 AM
#16
My only thought here is that there may be certain people who could benefit from a G50 box. They will take abuse far longer than a 915 will, and there are people out there who do not/will not match revs when downshifting, and or beat the syncros upshifting. For good drivers, the 915 is an excellent box. Some of my friends will never drive mine...
10-17-2011, 04:33 PM
#18
10-17-2011, 05:18 PM
#20
Intermediate
When I stop at a light I shift to second and then shift to first, this somehow helps it to just slide in. Once I pull away, I wait a split second after stepping on the clutch before shifting it to second. the very first time I got into my car I thought the gearbox or clutch was gone, then I learned how to drive it. now I love it.
BTW I am glad gears are made of metal cause if it was made of wood my butt would have been full of splinters
BTW I am glad gears are made of metal cause if it was made of wood my butt would have been full of splinters
10-18-2011, 01:32 AM
#21
Drifting
Thread Starter
2) don't go above 3.5K rpm on 1st gear.
3) Ease the lever into gear.
4) Don't force gears especially when the gearbox has not warmed up (actually even if it has warmed up).
5) If the first gear fails to engage go ahead and double clutch.
10-19-2011, 11:22 PM
#23
Burning Brakes
The reason I'm asking is when I test drove a 1985 the owner didn't do anything special when driving and didn't tell me to do anything out of the ordinary when I test drove the car. I shifted normally. The 85 I test drove only had 56K miles.
10-19-2011, 11:44 PM
#24
Rennlist Member
A follow up tp this question. I've heard and read on this forum about the double clutching to shift gears on a 915. Are all 915 like this or those that have a "tired" transmission?
The reason I'm asking is when I test drove a 1985 the owner didn't do anything special when driving and didn't tell me to do anything out of the ordinary when I test drove the car. I shifted normally. The 85 I test drove only had 56K miles.
The reason I'm asking is when I test drove a 1985 the owner didn't do anything special when driving and didn't tell me to do anything out of the ordinary when I test drove the car. I shifted normally. The 85 I test drove only had 56K miles.
10-20-2011, 02:22 AM
#25
Rennlist Member
I do it with my precious G50,..very gentle with her while she's coming up to temp......always: the rule. She'll see no more than 3K (whether 3rd or 4th while getting her to temp)...FREQUENT fluid changeouts, at that.
Beat to death (915/G50): the absolute requirement that the 915 be properly adjusted (or, even, modded) ,.. is,..... WITHOUT question, ABSOLUTE! THEN,..one learns it's needs (operationally)and quickly makes use of this fine tranny...it has "personality,..character" (to be non-technical for a moment). All, true. No one (in their right mind) could "slam" this tranny.
It's (simply) relative. Quite clear in w00tPORSCHE's info,...there were "developments",..(for the better).. Salukijac's points are on,..and are simply facts of spec'd improvement.....and all that's necc'y to do so (i.e., tranny improvements, a'la G50)....
BUT, to the 915,..it has it's "character",..and one develops a "relationship" (undertsanding?) with it, subsequently experiencing it's "specialty".......I call it: it's "signature"....
I have dined on honeydew, the handling thereof, being the G50 (relatively-speaking, that is).
I'd close by saying that I love the 915 tranny,...but not in my '89.
BEST!
Doyle
Beat to death (915/G50): the absolute requirement that the 915 be properly adjusted (or, even, modded) ,.. is,..... WITHOUT question, ABSOLUTE! THEN,..one learns it's needs (operationally)and quickly makes use of this fine tranny...it has "personality,..character" (to be non-technical for a moment). All, true. No one (in their right mind) could "slam" this tranny.
It's (simply) relative. Quite clear in w00tPORSCHE's info,...there were "developments",..(for the better).. Salukijac's points are on,..and are simply facts of spec'd improvement.....and all that's necc'y to do so (i.e., tranny improvements, a'la G50)....
BUT, to the 915,..it has it's "character",..and one develops a "relationship" (undertsanding?) with it, subsequently experiencing it's "specialty".......I call it: it's "signature"....
I have dined on honeydew, the handling thereof, being the G50 (relatively-speaking, that is).
I'd close by saying that I love the 915 tranny,...but not in my '89.
BEST!
Doyle
10-20-2011, 05:19 AM
#26
Three Wheelin'
And how do you shift when on the track? 
This gearbox was designed to be shifted fast and definitely not below 3500 rpm.
I have driven years on my 931 which has G31 gearbox (915 internals) and on my 911 I have 915 gearbox and these gearboxes are one of the most fun to drive ones on the track: precise and quick-shifting.
You have to use correct lubricant and have the linkage in perfect condition, then it will work well.
I definitely don't baby the gearbox but it still works good. And I think there is a difference between quick shifts, they can be executed good and not so good.
This gearbox was designed to be shifted fast and definitely not below 3500 rpm.
I have driven years on my 931 which has G31 gearbox (915 internals) and on my 911 I have 915 gearbox and these gearboxes are one of the most fun to drive ones on the track: precise and quick-shifting.
You have to use correct lubricant and have the linkage in perfect condition, then it will work well.
I definitely don't baby the gearbox but it still works good. And I think there is a difference between quick shifts, they can be executed good and not so good.
1) Press the clutch completely for changing gears.
2) don't go above 3.5K rpm on 1st gear.
3) Ease the lever into gear.
4) Don't force gears especially when the gearbox has not warmed up (actually even if it has warmed up).
5) If the first gear fails to engage go ahead and double clutch.
2) don't go above 3.5K rpm on 1st gear.
3) Ease the lever into gear.
4) Don't force gears especially when the gearbox has not warmed up (actually even if it has warmed up).
5) If the first gear fails to engage go ahead and double clutch.
10-20-2011, 09:14 AM
#28
Team Owner
Ive never double clutched .. and i certainly have shifted from first above 3500rpm . but of course once warmed up .. really no issues other than i slip it into first when rolling to a stop.
Last edited by theiceman; 10-20-2011 at 09:51 AM.
10-20-2011, 11:39 AM
#30
Racer
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coming from a 924s which had the 944 trans in it, I was very weary about buying a 915 trans 911 after many of the things i had read. But now that i have owned it for some time and really driven it I LOVE IT. The 915 forces you to be a better driver, to pay attention to what you are doing, which I have come to love about it. For me all the Porsche I have had have been about getting as close to the race track on back roads as possible. I have driven both the 915 and G50 and to this day suggest the 915 for a true car fan. If the 915 were that bad Porsche would have never won any races with it.....