Boxob Posted August 12, 2017 Report Share Posted August 12, 2017 @marseille haven't you mentioned a ECU swap with a 911 to raise the rev limit to release more from the engine? Not sure whether this is just on the 2.5 Boxster or across the 986 range. Link to comment Share on other sites More sharing options...
jimk04 Posted August 13, 2017 Report Share Posted August 13, 2017 No one has mentioned under drive pulleys. ....light weight flywheeels....sports cats.... They all wake the car up quite nicely. Link to comment Share on other sites More sharing options...
pquadro Posted August 13, 2017 Report Share Posted August 13, 2017 2 hours ago, jimk04 said: No one has mentioned under drive pulleys. ....light weight flywheeels....sports cats.... They all wake the car up quite nicely. I undertstand lightweight flywheel causes damage i nthe long run and rattling sounds compared to a DMS I wonder if sports clutch from sachs is a worthy upgrade? Link to comment Share on other sites More sharing options...
Boxster-Al Posted August 13, 2017 Report Share Posted August 13, 2017 On 10/08/2017 at 8:02 PM, Jemboxster said: The 2nd gear sync had started to fail as usual. 2nd gear failure is common on 986 gearboxes and is due to a design flaw with the selector mechanism. A replacement gearbox will have the same flaw. The only bullet proof solution is to have your gearbox rebuilt by a Porsche specialist who understands the design flaw and how to fix it. Just replacing the worn components will work for a while but the gearbox will fail in the same way eventually. I had the same problem on my 986S several years a go and it eventually led to the car jumping out of 2nd gear when lifting off the accelerator. I took my 986S to Sports and Classic who were one of the first Porsche specialists to offer a proper rebuild and fix the selector flaw. It cost me around £1500 and 75k miles later the gearbox still feels as good as it was after the rebuild which is to say brilliant. Link to comment Share on other sites More sharing options...
Boxster-Al Posted August 13, 2017 Report Share Posted August 13, 2017 On 10/08/2017 at 8:02 PM, Jemboxster said: The 2nd gear sync had started to fail as usual. 2nd gear failure is common on 986 gearboxes and is due to a design flaw with the selector mechanism. A replacement gearbox will have the same flaw. The only bullet proof solution is to have your gearbox rebuilt by a Porsche specialist who understands the design flaw and how to fix it. Just replacing the worn components will work for a while but the gearbox will fail in the same way eventually. I had the same problem on my 986S several years a go and it eventually led to the car jumping out of 2nd gear when lifting off the accelerator. I took my 986S to Sports and Classic who were one of the first Porsche specialists to offer a proper rebuild and fix the selector flaw. It cost me around £1500 and 75k miles later the gearbox still feels as good as it was after the rebuild which is to say brilliant. Link to comment Share on other sites More sharing options...
Boxster-Al Posted August 13, 2017 Report Share Posted August 13, 2017 On 10/08/2017 at 8:02 PM, Jemboxster said: The 2nd gear sync had started to fail as usual. 2nd gear failure is common on 986 gearboxes and is due to a design flaw with the selector mechanism. A replacement gearbox will have the same flaw. The only bullet proof solution is to have your gearbox rebuilt by a Porsche specialist who understands the design flaw and how to fix it. Just replacing the worn components will work for a while but the gearbox will fail in the same way eventually. I had the same problem on my 986S several years a go and it eventually led to the car jumping out of 2nd gear when lifting off the accelerator. I took my 986S to Sports and Classic who were one of the first Porsche specialists to offer a proper rebuild and fix the selector flaw. It cost me around £1500 and 75k miles later the gearbox still feels as good as it was after the rebuild which is to say brilliant. Link to comment Share on other sites More sharing options...
PaulQ Posted August 13, 2017 Report Share Posted August 13, 2017 2 minutes ago, Boxster-Al said: I took my 986S to Sports and Classic who were one of the first Porsche specialists to offer a proper rebuild and fix the selector flaw. It cost me around £1500 and 75k miles later the gearbox still feels as good as it was after the rebuild which is to say brilliant. I know Hartech can do the the same, not sure of any others. Link to comment Share on other sites More sharing options...
Tex24v Posted August 14, 2017 Report Share Posted August 14, 2017 Yeah there is a few places around that'll do the rebuild. Fine if you have the money, I didn't. Link to comment Share on other sites More sharing options...
Jemboxster Posted August 15, 2017 Author Report Share Posted August 15, 2017 On 12/08/2017 at 5:47 PM, Nobbie said: He replaced it with a 3.4 996 engine, read the details of his ride under his avatar? Lol cheers I'm still figuring out how to use this forum Link to comment Share on other sites More sharing options...
Jemboxster Posted August 15, 2017 Author Report Share Posted August 15, 2017 Think il look around at them specialists you guys have mentioned. I'm back to London tomorrow and will start my research. thanks a bunch Link to comment Share on other sites More sharing options...
Hario Posted June 26, 2018 Report Share Posted June 26, 2018 Ancient post excavator here. Mine is a manual 2000 3.2S with a stiff when cold 1-2-3 shift. Am I correct in thinking this 'late' 986 has a G86/20, which could be swapped for a later G87/20(1) from a 987? For better synchros etc, I know the inner CV flanges are different sized to the CV's (or shafts) from a 987 would need to be used, if swapping the box output flanges is not possible. Is the shift the same? Or could 987 shifter & cables be swapped to overcome? Are the mounts the same? Look forward to anyone info! Beers! Link to comment Share on other sites More sharing options...
Tex24v Posted June 26, 2018 Report Share Posted June 26, 2018 Sorry I don't know the answers to your questions. But, as I mentioned earlier in this thread, I changed my Knackered 2001 gearbox out for a second-hand 2003 one, obviously it fitted perfectly as it is also a G86/20. I don't know for sure but I think it is a definite possibility that Porsche had started to make a few mild modifications to improve the gearbox/synchros, quite possibly at the time of the facelift? and mine is still faultless almost two years after replacement. Might be an easier option than trying to modify a G87 to fit your 2000 car? Also, not sure that stiff changes are anything to be concerned about, it is the grinding and eventual blocking of the gears you should be worried about. Link to comment Share on other sites More sharing options...
edc Posted June 26, 2018 Report Share Posted June 26, 2018 IIRC 986 and 987 engine and gearbox mounts interchangeable. As is the shifter. Not sure about cables. 986 cables not exactly unreliable so don't see the benefit of going different there. Link to comment Share on other sites More sharing options...
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