^ What Kevin said. Trust me, I learned it the hard way.

 

^ What Kevin said. Trust me, I learned it the hard way.
I had a catastrophic 3rd gear failure at Barber's front straight last December.
Barely three weeks after Bill's rebuild of my box, I was doing COTA (two drivers). No issues at all.
Next month I'm doing TWS with Chin.

 

How many man hours for tyranny removal and refitting according to Porsche norm?

How many man hours to rebuild properly?

 

removing tyranny has cost many lives

 

:-).

 

to R&R the g'box in/out of the car. 5.5 hours- 6 max. thats after fiddling with the shift fork to get it aligned. ( in/out 2-3 times lol )

the rebuild depends on what is needed to replace, but since i only needed the bearings it was a quick in/out. 10 hrs give or take. so honestly it's a 15-20 hour job. bearings fail due to the sealed nature of them and the heat cycles. there's no way to lube them. they dry out, and fail. as noted above. *most* people replace the 1/2 synchros ( cheap and why not ) but not the 1-2 gears ( unless needed of course ) as that requires replacing the mainshaft as also noted above.

the removal of tyranny is quite another story, and mankind has been, and will continue the struggle against this for years to come, with little hope for success i'm afraid lol

 

Must love ipad. I write tranny and it auto corrects to tyranny. Ha ha ha. Never trust apple; always triple spellcheck your witting - ha ha ha.

 

that's nothing. i wrote to my gf using siri on my iphone that was i concerned about the rapid encroachment of tyranny, and she told me to stop worrying, and that some silly man in a killer dress couldn't hurt me.

 

:-).

 

lol.i'm just here to amuse us simon. but gl with the trans! i think some folks that aren't in major metro areas, are at the MERCY of the mechanics they have around locally and your anecdotes tend to support that notion, i'm afraid.. i have the good fortune of having a race shop wrench on mine, and they know i know my sh*t ( within reason lol ) so i don't get bent over on prices or advise.

just to reiterate though. there are NO 89$ gearsets for these cars. 6-800 is more like it. the triple cone synchros or bearings? at 89 ( ballpark )? are a different story. GL brother.... just don't get fkd twice!

 

You are describing the G96/00&96/01 Carrera gearboxes. The turbo gearbox doesn't have those sealed bearings. The 996tt gearbox is basically a GT3 gearbox with different ratios, AWD, and no oil cooler.

 

really!? wow, have i been uninformed. i watched a utube vid of the sealed ones once they had turned to a molten oozing mess. i was under the impression we had the same the g50 g'box. thx for the clarification. so, the main/thrust bearings are lubed by the internal g'box oil? making them LESS prone to drying out or heat cycle drying as in the carerra box?

what causes them to go bad..beyond that ridiculous factory gearoil change interval. i KNOW that can't be "right". i'm gonna change every 15-20k. dont wanna open that box up again.

 

The Porsche bean counters really hosed us turbo owners.. We paid the premium for the car, and we received crap in return with our gearbox vs the GT boxes..

Matt can tell us what it cost for (parts only) to upgrade the box using the factory cooler and pump, rear housing AND limited slip!

 

OP I could have written this thread. I will have well over $10k in my transmission rebuild when I pay the second mechanic. Looks like the second time will be the charm. I'll know for sure when I put her on the track in a few weeks. Morale of the story, do significant homework before embarking on Porsche transmission work.

 

^ tis true. my first cars gbox had to be opened TWICE after the first rebuild for 2nd gear pop was unsuccessful. THEN the master tech at la's largest dealership discovered the amended specs from porsche that later called for different shim tolerances allowing for the alteration of the gear stack placement. gee, sure wish they;d thought of that the first time, but thankfully it was a CPO deal or i'd a been pissed.

but here's a fair list of all scenarios; taller gear sets - full synchro ring sets - oil cooller assemblies etc. (scroll down to the 6mt turbo section ) from roger at cms' site http://www.californiamotorsports.net/996.htm he's as comprehensive as anyone and matt was willing to share his advice also, and equally helpful. wish i had gone with the taller gear sets but i couldn't justify tossing perfectly good gears away! hell, i didn;t even need synchros this time round! i guess that double clutching helps.. if not my clutch slave! it hates it. ha

yeah.. these gear boxes.. kind of a weak link, i'd say