1983 tranny rebuild
02-07-2004, 05:42 PM
#1
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1983 tranny rebuild
Wise people
Please assist me with this one
My 1983 928S has usual syncro wear and rather noisy sounds (whine) in all gears, most in 1st and 2nd
My son and I have pulled out the tranny and although we have the full workshop manual, it is not overclear on the process of dimantling, testing and reassembly.
So my question is, first is there a better description of the process of rebuilding one of these trannys anywhere on line and does anyone have another suggestion of pointer to a good solution for this otherwise ve4ry fine car
Thanks in advance
Phil
Please assist me with this one
My 1983 928S has usual syncro wear and rather noisy sounds (whine) in all gears, most in 1st and 2nd
My son and I have pulled out the tranny and although we have the full workshop manual, it is not overclear on the process of dimantling, testing and reassembly.
So my question is, first is there a better description of the process of rebuilding one of these trannys anywhere on line and does anyone have another suggestion of pointer to a good solution for this otherwise ve4ry fine car
Thanks in advance
Phil
02-07-2004, 11:14 PM
#2
Nordschleife Master
Well, I'm hit-or-miss on the wise factor, but here goes...
Haven't seen a good reference on rebuilding the early manual transmissions.
There's no "cure" to the synchro design, just putting in more synchros. You could get the later tranny as it'll mount right up. 1985 and later, I believe, for the Borg-Warner synchros.
When I got tired of my synchro problems I pulled the tranny (Father/son as well) and had it rebuilt. The synchros are cheap enough, but the opportunity to mangle those pricey gear sets made me balk. There's nothing remarkable about the tranny design compared to other Porsche units of the era.
You might check the forum and email archives for info. Those who've done it don't make it sound hard.
Haven't seen a good reference on rebuilding the early manual transmissions.
There's no "cure" to the synchro design, just putting in more synchros. You could get the later tranny as it'll mount right up. 1985 and later, I believe, for the Borg-Warner synchros.
When I got tired of my synchro problems I pulled the tranny (Father/son as well) and had it rebuilt. The synchros are cheap enough, but the opportunity to mangle those pricey gear sets made me balk. There's nothing remarkable about the tranny design compared to other Porsche units of the era.
You might check the forum and email archives for info. Those who've done it don't make it sound hard.
02-08-2004, 08:01 AM
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Perhaps I should look to 928 international and get a rebuilt unit
Can I fit any year in here, if so what are the advantagesz and disadvantages
I see 928 int has 82 - 84 then 85 86 and then later ones
How many versions of this tranny are there?
WHich is best?
THanks
Can I fit any year in here, if so what are the advantagesz and disadvantages
I see 928 int has 82 - 84 then 85 86 and then later ones
How many versions of this tranny are there?
WHich is best?
THanks
02-08-2004, 01:28 PM
#4
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There aren't that many shops with direct experience in rebuilding 928 transaxles. I found a shop that had experience with the G50 911 transaxle and provided them with photo copies (greasy hands, you know) of the workshop manual sections. It wasn't a problem for them to figure out the differences.
Get a gasket kit that contains all the sealing parts and replace the synchros and what ever bearings look worn. You'll get another 150,000 miles out of the box.
Get a gasket kit that contains all the sealing parts and replace the synchros and what ever bearings look worn. You'll get another 150,000 miles out of the box.
02-08-2004, 02:39 PM
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German Transaxle of America Inc., OREGON www.go.to/gtainc 800-892-4327
Under $400 labor fee on the 928 unit (plus parts and shipping).
You're welcome
Under $400 labor fee on the 928 unit (plus parts and shipping).
You're welcome
02-09-2004, 09:11 PM
#7
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Just replacing the syncros will most likely not fix your problems. You need to look and the shift sleeves and dog or engagement teeth as well. A Porsche mechanic that has 915 (early 911) gearbox experience could probably handel the job but nothing beats experience. We have sold 47 5sp transmissions in the last 4 years so our rebuilder has lots of experience.
