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What Greg is saying is that data in PET regading roll pins is wrong. One needs to understand which pin needs go to where and not just blindly trust what PET says because pins will see different amount of forces. Putting them into wrong places can cause problems.
Location spring has been no longer available for years and its unlikely its coming back. Even if it were its questionable if it would make sense to use factory part if they do not change its design. There is aftermarket version available which in theory at least should last much longer. There are few threads in archives which show how factory design will fail, how aftermarket version is better and where to get it.
RE: the low rpm/hi torque 'noise', if it's that graunchy noise made around 1500 rpm when just getting into the throttle from a standstill, every late-model 5 speed I've driven makes that noise.
Me too. Of the 12 or so GTs I have driven, they have all made this noise at about 1500 rpm. Even very low mileage cars. I just ignore it on mine.
Gearbox components generally found to be in good condition.
928 303 034 09 is in A1 condition with no cracks.
However the LSD was found to be poorly set-up and over tightened which has caused some premature wear to the ring and pinion and visible scoring to inside of the LSD bearing runners. [ 999 059 027 02 ].
Gearbox components generally found to be in good condition.
928 303 034 09 is in A1 condition with no cracks.
However the LSD was found to be poorly set-up and over tightened which has caused some premature wear to the ring and pinion and visible scoring to inside of the LSD bearing runners. [ 999 059 027 02 ].
A shoelace was found in the oil ??? WTF
I love transmissions. They are so...mechanical. I like the smell of gear oil....apparently not everyone does.
More fun to rebuild than anyone should ever have.....I hope you are enjoying it.
Like I said before, in this thread, very seldom are differential "swaps" done correctly. Not many people understand the process and even fewer have the tools required to set up the pre-load and the backlash. Heck, not many even have a selection of shims to set this stuff up.
If you are replacing the ring and pinion, even less people can do this....the proper tools to measure amd to set up the pinion depth are very rare. Then you need pinion shims and shims to set-up the stack height to make sure the clearance for 5th gear to 4tha nd 5th shifting hub are correct.
Shoelace used to lift the layshaft gear set up to put the shaft through and then forgotten?
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
the proper tools to measure and to set up the pinion depth are very rare.
Oh c'mon, you only need about half a dozen bits from the VW385 set, they're still available (except for that fragile unobtanium plastic part of 385/1, of course) , and last I checked the set was only $3800. It's so easy!
Oh c'mon, you only need about half a dozen bits from the VW385 set, they're still available (except for that fragile unobtanium plastic part of 385/1, of course) , and last I checked the set was only $3800. It's so easy!
Which brings up a true story....
Not all Porsche ring and pinions have always been pretty. (28 ring and pinions are always pretty....not the same case with 911 ring and pinions....especially the race pieces.
I've gotten 8/32 ring and pinions for G50 transmissions that had the world's ugliest patterns on them.
Anyway, one day I was setting one of these bastards up and the pattern was awful....right on the numbers, but awful. Looked like the photo in the "How to set-up a ring and pinon" book of the example with the wrong pinion depth.
I called a buddy (a huge 911/356 transmssion rebuilder)...and asked him if I could borrow his VW385, because I was certain mine had been damaged and no longer was giving me the correct reading.
"No problem...come and get it."
When I got there, he went and pulled it off the shelf...it had a full 1/16" of dust on it....literally.
I asked him if he had two....thinking I'd buy this one, from him.
"Nope, don't use it."
Stunned, I asked him how he functioned without it...
"You worry too much about that dimension stuff. You don't want the thing to be perfect....it won't ever wear out and come back for another ring and pinion. Stuff those new pieces into the case with the same shims and forget it."
This was about the time I started figuring out that not all mechanics were created equal, even though they all charge about the same exact amount of money to do a job.....
Got some further bad news today - when the mechanic finally got the bearings of the LSD he found that the ends of the carrier were also damaged by the over tightening. So I also need a new LSD carrier but I couldn't find a second hand one anywhere so I'm going to have to buy a complete new LSD as you can't just buy the carrier by itself.
04-23-2016, 07:50 AM
