g50/31 box
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All of the /20 & /21 can have 3-6 changed easily enough, 1 & sometimes 2 are integral w/ the main shaft, the changeover trans #s are
G50.20 - 02693
G50.20 - 02174 (M220)
G50.21 - 05072
G50.21 - 03094 (M220)
before only 1 is fixed after 1 & 2 are fixed, to change them a new mainshaft is required(last price I saw Was ~$2000, I'me sure it's much more now)
The Motorsports boxes, /30 -/33 have loose gears in all positions 1-6
Many choose to leave the main shaft alone and change 3-6 and that works but isn'e really an optimal way to do it.
G50.20 - 02693
G50.20 - 02174 (M220)
G50.21 - 05072
G50.21 - 03094 (M220)
before only 1 is fixed after 1 & 2 are fixed, to change them a new mainshaft is required(last price I saw Was ~$2000, I'me sure it's much more now)
The Motorsports boxes, /30 -/33 have loose gears in all positions 1-6
Many choose to leave the main shaft alone and change 3-6 and that works but isn'e really an optimal way to do it.
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/31 is 1 step up from /21 which is a step up from /20
/32 has more good stuff and better gearing
/30 has the most good internals and the best gearing but isn't going to be generally available
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Joined: Feb 2004
Posts: 2,361
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From: SF Bay Area
I just did this last year. I agree with Bill, better (and actually way more cost effective) to simply sell your old box and buy a g50/31. In addition you also get a Porsche Motorsports LSD. As a bonus, I'm guessing your old box is a g50/21, which will be easy to sell for top $$$.
Here's a link to my impressions of the new gearbox:
https://rennlist.com/forums/showthre...ferrerid=21390
Cheers,
Joe
Here's a link to my impressions of the new gearbox:
https://rennlist.com/forums/showthre...ferrerid=21390
Cheers,
Joe
Last edited by JM993; Nov 3, 2010 at 01:39 PM.
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Last prices I saw
/32 north of $12k w/ a like exchange
/31 $north od $6.5k w/ a like exchange
I'm sure that jmarch has better #s
[QUOTE]You could build one to that spec for less than that/QUOTE]
So could you price one out at current prices
w/
new mainshaft, steel syncros, billet forks, billet shift spindle
last prices I saw a few years ago was
$1950 mainshaft
$750 2nd gear set
$695 3-6 gear sets
$2350 for 40/60 lsd
h/d 1/2 shift fork $199
h/d sbillet shift spindle $275bearing kits ~$140 each
/32 north of $12k w/ a like exchange
/31 $north od $6.5k w/ a like exchange
I'm sure that jmarch has better #s
[QUOTE]You could build one to that spec for less than that/QUOTE]
So could you price one out at current prices
w/
new mainshaft, steel syncros, billet forks, billet shift spindle
last prices I saw a few years ago was
$1950 mainshaft
$750 2nd gear set
$695 3-6 gear sets
$2350 for 40/60 lsd
h/d 1/2 shift fork $199
h/d sbillet shift spindle $275bearing kits ~$140 each
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Joined: Oct 2002
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The last time I priced up building one with original parts, the parts bill alone from Porsche came to just under £6k +VAT and the last used one we found sold for around £8k +VAT. I would think that you could build an equivalent box for maybe £5-6k with slight variations on the ratios, however I think a better plan may be to consider a used 996GT3 gearbox and fit the cable change gearlever to match.
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Joined: Jul 2002
Posts: 950
Likes: 12
From: UK
A change of heart Jackal???
I saw your discussion on a P/heads about gear ratios, where you thought the standard ratios were better for your use of the car....Even if it did surprise me.
There are always people looking for these, some end up in Ultimas with big power etc....
For some reason the previous owner had the /32 in mine rebuilt at an OPC in 2001, remove, rebuild, refit was £11k!!!.....glad I didn't have to pay that particular bill!!!
I saw your discussion on a P/heads about gear ratios, where you thought the standard ratios were better for your use of the car....Even if it did surprise me.
There are always people looking for these, some end up in Ultimas with big power etc....
For some reason the previous owner had the /32 in mine rebuilt at an OPC in 2001, remove, rebuild, refit was £11k!!!.....glad I didn't have to pay that particular bill!!!
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Racer
Joined: Apr 2009
Posts: 427
Likes: 0
From: London
A change of heart Jackal???
I saw your discussion on a P/heads about gear ratios, where you thought the standard ratios were better for your use of the car....Even if it did surprise me.
There are always people looking for these, some end up in Ultimas with big power etc....
For some reason the previous owner had the /32 in mine rebuilt at an OPC in 2001, remove, rebuild, refit was £11k!!!.....glad I didn't have to pay that particular bill!!!
I saw your discussion on a P/heads about gear ratios, where you thought the standard ratios were better for your use of the car....Even if it did surprise me.
There are always people looking for these, some end up in Ultimas with big power etc....
For some reason the previous owner had the /32 in mine rebuilt at an OPC in 2001, remove, rebuild, refit was £11k!!!.....glad I didn't have to pay that particular bill!!!
thinking ahead & want to know my options
depends if i go the whole hog and do buckets, cage etc.. or keep it more as an all day, every day car... and this in turn depends on what my next car is etc.. so all part of the bigger picture