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Join Date: Dec 2008
Location: North Carolina ,Conover
Posts: 48
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What trans.
Looking at all the 928's road racing ,what trans is the best for this .
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01-19-2009, 09:26 PM
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Network Native
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Location: SoCal
Posts: 10,349
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GT tranny, a G28/55 is highly desirable, and hard enough to get at almost any price.
Jim Bailey does a lot of winning with an old 80 tranny, but most mortals settle for any 85+ we can find. |
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01-20-2009, 12:28 AM
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Location: North Carolina ,Conover
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the early trans what numbers are on it . thank's in advance
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01-20-2009, 05:24 AM
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You really don't want a Porsche synchromesh box for a racing transmission. Pick an 85 or newer...
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Current: 914/6 GT Conversion, Cayman Old: Many PCars + Formula Racecars |
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01-20-2009, 05:49 AM
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Location: Atlanta
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It sure would be nice to have a real non syncro box like a cup car
 .I find that one problem is that the early box sometimes gets stuck when shifted with too much force, that really sucks during a race but you learn to be gentle and it works just fine 
__________________
Mike S. 79 928 Racer 427ci 32v 640WHP |
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01-20-2009, 10:30 AM
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JimB having success with an old tranny was not an endorsement.
 Sorry if I wasn't clear but I would NOT recommend anything pre 85 for serious shifting. Early 5 spds are G28/01 to 09, and all are about equally bad, but I kind of assume some things were improved over time. I have a G28/08 in my 83, and I don't know how many models it applies to, but the input bearing that should be replaced with any "real" rebuild is $500, some years its like $60. |
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01-20-2009, 11:38 AM
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From having the 1979 Euro 18 years ago I have a spare trans # 928.301.101.4r and was thinking about a track car.
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01-20-2009, 04:35 PM
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Thats the casting number, look on the bottom where the trans and diff meet for the ID, likely a G28/03.
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01-20-2009, 05:20 PM
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Location: North Carolina ,Conover
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G28/03 110 114 stamped on bottom
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01-20-2009, 06:08 PM
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Quote:
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US 83 zinc metallic 5 spd, aka the nice car. Euro 85 black, 5 spd, the fast rough track car maybe car. SOLD Euro 84 red, AT, only car in garage in years, my parts car, soon to go last 7 years. |
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01-20-2009, 06:36 PM
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1978 928 - 9288200072
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Quote:
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02-06-2009, 08:58 AM
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That doesn't seem right, but I don't have a better reference to offer. All 928's are 8 cylinder and the automatic vs 5 spd is in the first letter G or A.
G28/XX YY Zz NNNN G28, A22, or A28, with the split between A22/A28 I think in the middle of 83. / is just a spacer XX is tranny type and doesn't match to year model changes. YY can be missing or show differential type. Zz first digit seems always 1, second digit I think is standard vs optional gear ratio NNNN serial number. This applies to the VIN and AFAIK not to the tranny. digit 3 - 0 means 1980. 8-1978, 9-1979, A-1981 etc. Letters I/O/Q are not used. S-1995. On the motor id, M28/XX, the XX is a sequenced model number, but the second digit shows 5 spd or auto, and is often 1 = 5 spd, and 2 = auto. |
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02-06-2009, 01:18 PM
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1978 Porsche 928
