Halfshafts and transaxle
11-20-2003, 05:00 PM
#1
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Halfshafts and transaxle
This is my first post, please bear with me, I can be verbose.
I was an aircraft mechanic in a past life, have access to tools and shop, but haven't purched books and am short on time and patience to complete selected repairs before an unwelcome hiatus and return stateside with my girlfriend (88 auto, U.S. spec rare in Germany). It was a hate relationship prior to a new Fuel pump, rebuilt LH brain, new ignition relays and bouncing baby radiator. It's a love relationship with the service and warrantees from Herr Stoll and the Meistermechanic at Porsche Zentrum Wurzburg. It's worth the admission price when people respectfully take the right lane on A81 to Stuttgart. BUT 3000 Euro, later and in the interest in pretending to save money:
The Meister at Kupfing Auto (Porsche Team racing mechanic for 11 years) tells me halfshafts need replacing, input seal on xmsn, among other things. The moderate whine seemingly from somewhere in the center dash/firewall area has turned, after the radiator install, to a healthy high-pitched groan from the midsection, heard inside and out, in P and D, increasing and modulating with upshift. I've read some things and been warned about torque tubes here and by a fellow owner. I've also seen scary pictures of bad thrust bearings. Wurzburg says "die sount you half ist frum der transzaxle, but die car makes o.k. to drife." What am I hearing (not the German, the noise)?
And what, in calibrated eyeball units, are the specs for halfshafts and CVs? When you grab right or left, you can push them right and left on the 45 quite some distance. I am loath to put a number here, you'll call me an idiot and I already know that. Knowing German perfection, and what "close tolerance" means, this probably isn't it.
I realize most of you are D-I-Y-Sers, which I will be when the situation allows. I'm simply availing myself of the professional service I can't equal to redeem this deserving vehicle to a post-neglect condition (4 german owners=15 years winter storage + time it was in the States???)
Don't worry, my following posts will be short. I will contribute what little I've learned in the year I've had the car, and anything you want to know about touring or living in Germany (in the lounge, of course).
My first name Eric, my last name is damn-I-love-this-car.
I was an aircraft mechanic in a past life, have access to tools and shop, but haven't purched books and am short on time and patience to complete selected repairs before an unwelcome hiatus and return stateside with my girlfriend (88 auto, U.S. spec rare in Germany). It was a hate relationship prior to a new Fuel pump, rebuilt LH brain, new ignition relays and bouncing baby radiator. It's a love relationship with the service and warrantees from Herr Stoll and the Meistermechanic at Porsche Zentrum Wurzburg. It's worth the admission price when people respectfully take the right lane on A81 to Stuttgart. BUT 3000 Euro, later and in the interest in pretending to save money:
The Meister at Kupfing Auto (Porsche Team racing mechanic for 11 years) tells me halfshafts need replacing, input seal on xmsn, among other things. The moderate whine seemingly from somewhere in the center dash/firewall area has turned, after the radiator install, to a healthy high-pitched groan from the midsection, heard inside and out, in P and D, increasing and modulating with upshift. I've read some things and been warned about torque tubes here and by a fellow owner. I've also seen scary pictures of bad thrust bearings. Wurzburg says "die sount you half ist frum der transzaxle, but die car makes o.k. to drife." What am I hearing (not the German, the noise)?
And what, in calibrated eyeball units, are the specs for halfshafts and CVs? When you grab right or left, you can push them right and left on the 45 quite some distance. I am loath to put a number here, you'll call me an idiot and I already know that. Knowing German perfection, and what "close tolerance" means, this probably isn't it.
I realize most of you are D-I-Y-Sers, which I will be when the situation allows. I'm simply availing myself of the professional service I can't equal to redeem this deserving vehicle to a post-neglect condition (4 german owners=15 years winter storage + time it was in the States???)
Don't worry, my following posts will be short. I will contribute what little I've learned in the year I've had the car, and anything you want to know about touring or living in Germany (in the lounge, of course).
My first name Eric, my last name is damn-I-love-this-car.
11-20-2003, 05:23 PM
#2
Nordschleife Master
Could you repeat the question?
The bearings have a bit of slop and move back and forth a bit. As jacking the car changes the wear surfaces, you've got to pull the bearings and dis-assemble them to make an truely objective evaluation of the wear. If the bearings are noisy, then it's time to change them.
The bearings have a bit of slop and move back and forth a bit. As jacking the car changes the wear surfaces, you've got to pull the bearings and dis-assemble them to make an truely objective evaluation of the wear. If the bearings are noisy, then it's time to change them.
11-22-2003, 04:39 PM
#3
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Have had the car on both a 4-point and today on a drive-on lift, regardless each shaft can be moved approximately 2-3 inches right and left. No noise, but noticeable vibe from 140 to 190/200kph. Just had an alignment done, and pretty sure it's not wheel balance. I think it's the shafts. Plus the excessive hard shift I get from P to any gear and back (unless I brake heavily) has me thinking; the dead space between txmsn before it engages to the wheels is possibly caused by excessive slop in the halfshafts. Also, when I park and let off the brake, the car will settle; it rolls farther from the point where brake was applied to the point the txmsn holds the car than any automatic I've ever driven. Hope it's not deep in the tranny.
