noise, how to find where it is from?
#31
08-20-2014 | 07:05 AM
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The bad bearing was the passenger side output shaft bearing. My mechanic said there was a minor leak at the seal and some play in the output shaft. From what I understood, some mechanics will service these, although the procedure is undocumented from Porsche. The seals can be readily obtained, the bearings aren't available from Porsche but were manufactured by *** and could be sourced.
From what I understand, there is a bearing near the half shaft entry. My mechanic did not think that one was serviceable. I assume the viscous coupling has associated bearings, but they were never mentioned. Perhaps they are built-in with the VC?
I was able to source a front diff from another 6spd member. It was more economical than any other option.
I know there was a DIY on this forum from a few years back that detailed the rebuild really well.
From what I understand, there is a bearing near the half shaft entry. My mechanic did not think that one was serviceable. I assume the viscous coupling has associated bearings, but they were never mentioned. Perhaps they are built-in with the VC?
I was able to source a front diff from another 6spd member. It was more economical than any other option.
I know there was a DIY on this forum from a few years back that detailed the rebuild really well.
Thanks Rich for this clarification!
#32
08-20-2014 | 07:11 AM
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i know, was thinking about it, only problem is i have to install a LSD in the transmission if i do that and it will cost more than buying a used front diff. Otherwise it will be useless at the track.
Although i am thinking about selling the car, if next owner doesn't track, i guess having no front diff shouldn't be an issue.
#33
08-20-2014 | 08:25 AM
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i know, was thinking about it, only problem is i have to install a LSD in the transmission if i do that and it will cost more than buying a used front diff. Otherwise it will be useless at the track.
Although i am thinking about selling the car, if next owner doesn't track, i guess having no front diff shouldn't be an issue.
Although i am thinking about selling the car, if next owner doesn't track, i guess having no front diff shouldn't be an issue.
that said, ca motorsports has a wavetrac for 1000 right now. it would totally transform the car. but you're 100% right. it is needed if you did go rwd.
#34
08-20-2014 | 09:31 AM
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I wouldn't touch it if you are planning to trade it in. Might even not do anything even if selling private party, depends on the vehicle's overall condition and how soon you plan to sell. I just don't see you recouping your money.
#36
08-20-2014 | 10:16 AM
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he's gotta do something though. either replace the diff or remove and convert to rwd. can't sell it whining in gear!
i feel that my car is past the point of return going back to stock. it is something to consider vis a vis re-selling it. but i'll never get my money back either. but then it never was an "investment" thankfully lol
#38
09-10-2014 | 01:29 PM
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well then hopefully it is only the bearings and nothing "major." though opening the box is enough of a big deal. that's all i needed. good luck...
and if you're keeping the car? i took this same situation as an opportunity to install a wavetrac. phenomenal.
and if you're keeping the car? i took this same situation as an opportunity to install a wavetrac. phenomenal.
#39
09-10-2014 | 01:35 PM
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Just checked your thread about the wavetrac, if i keep the car i will probably be more tempted by a Guard than a wavetrac, and they are more expensive...
how much did the rebuilt ended up costing you if you only replaced the bearings?
how much did the rebuilt ended up costing you if you only replaced the bearings?
Last edited by pumalex; 09-10-2014 at 01:37 PM.
#40
09-10-2014 | 02:02 PM
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i certainly looked into both options and my reasonably educated advice would be that if you are ( primarily? ) tracking your car then the guard lsd is definitely the way to go, though plate type ( real ) lsd's may need to be rebuilt over time. whereas on the street? the wavetrac which is the "torque biasing differential" would be MORE than sufficient for anyones needs, and has a lifetime guarantee against failure. whatever that means lol. but i often think of it as one of the best things I've done to the car.
i spent 6 hours labor to drop the trans and put it back in, and i want to say about 2k to open/close the box, determine nothing beyond bearings was needed, and then flange/shim the wavetrac to the trans and back in the car so with parts and labor around $2.5 to maybe 3K trans work and six hun to r&r it in/out of the car. is about right, though most places charge more that i was charged.
i spent 6 hours labor to drop the trans and put it back in, and i want to say about 2k to open/close the box, determine nothing beyond bearings was needed, and then flange/shim the wavetrac to the trans and back in the car so with parts and labor around $2.5 to maybe 3K trans work and six hun to r&r it in/out of the car. is about right, though most places charge more that i was charged.
#41
09-10-2014 | 02:12 PM
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i will drop the trans myself, just wasn't sure i want to try to do the tear down myself as i don't think i have all it needs to do it. (including special tools and knowledge)
i think i will keep the car awd without a lsd, i can't put an other 2k in it not knowing if i will keep the car or not.
i think i will keep the car awd without a lsd, i can't put an other 2k in it not knowing if i will keep the car or not.
#42
09-10-2014 | 03:04 PM
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dropping it, yes i could see.. but the trans teardown/inspection/r&r? you're wise not to open that pandoras box on your own. i wouldn't want to try that without a press/machine shop etc. that part is for the serious pros. as it was i just stood there while we dropped my trans 
while the box was sent to some secret hideaway where the reclusive mad porsche genius guy did the work. he couldn't believe the car had 115k miles ( at the time ). i suppose double clutching DOES help lol.
i hear you on the lsd and resale. not so sure i would do it either like i said earlier. same with rwd. not if selling is a possibility? you really limit the numbers of buyers who would be ironically getting a far superior handling/driving car lol.
but good luck with it. i bet it's just the bearings. if you want? post or pm once you get prices numbers? and i'll tell you if thats inline with what i learned ( IIRC! ). again, i've had THREE trans opened! in 2 different cars.
while the box was sent to some secret hideaway where the reclusive mad porsche genius guy did the work. he couldn't believe the car had 115k miles ( at the time ). i suppose double clutching DOES help lol.i hear you on the lsd and resale. not so sure i would do it either like i said earlier. same with rwd. not if selling is a possibility? you really limit the numbers of buyers who would be ironically getting a far superior handling/driving car lol.
but good luck with it. i bet it's just the bearings. if you want? post or pm once you get prices numbers? and i'll tell you if thats inline with what i learned ( IIRC! ). again, i've had THREE trans opened! in 2 different cars.
#45
10-17-2014 | 03:39 PM
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especially at the expense of someones trans!i have to breakdown in my head the cost just related to the g'box as i did a few things at the same time.
i wanna say... 3000/3500 to r&r the g'box replace the bearing(s), shim the wavetrac and button back up. 6 hrs labor to r&r the box in/out the car with lsd installed.
PLEASE believe me a dual duty car that lives primarily on the street could not POSSIBLY outperform or exceed the limit(s) of what the less expensive wavertrac can do/does do for the car. it's such a night vs day thing that if you had a chance to run one with, and one without, under the right street/track conditions? you'd add it in a heartbeat. it's just that "good"/different rwd with lsd. totally different car, and i'm not being hyperbolic.
Last edited by '02996ttx50; 10-17-2014 at 03:46 PM.