Gearbox Gears / Crown Wheel and Pinion

This 2mm spacer ring allows for a much easier setup when retrofitting some differentials and or crown wheel and pinions within the 915 family.

Note
Longer ring gear bolts may be required

2nd gear set for 915 gearbox

Fits:
Porsche 911 - 1972 to 1986 
For 915 gearbox

Available with different gear ratios - example - 21:30 (number of teeth on each gear) - 1.43:1 (gear ratio)

21:30 - 1.43:1 (Porsche ref "LU")
20:31 - 1.55:1
20:32 - 1.60:1 (Porsche ref "KW")
19:31 - 1.63:1
19:32 - 1.68:1 (Porsche ref "JW")

19:33 - 1.74:1
18:32 - 1.78:1 (Porsche ref "HW")
18:33 - 1.83:1 (Porsche ref "HX")
18:34 - 1.89:1 (Porsche ref "HY")
15:29 - 1.93:1 (Porsche ref "ET")
15:30 - 2.00:1
17:35 - 2.06:1
16:35 - 2.19:1 (Porsche ref "FZ")
16.37 - 2.31:1

Diagram ref no 2

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91530290239

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3rd and 4th gear set for 915 gearbox - Can be used for 3rd and 4th gear

Fits:
Porsche 911 - 1972 to 1986 
For 915 gearbox

Available with different gear ratios, example - 31:22 (number of teeth on each gear) - 0.59:1 (gear ratio)

31:22 - 0.71:1 ("TL" Porsche reference)
29:22 - 0.76 ("TM" Porsche reference)
28:22 - 0.79:1 ("SM" Porsche reference)
28:23 - 0.82:1 ("SN" Porsche reference) 
28:24 - 0.86:1 ("SO" Porsche reference) 
27:24 - 0.89:1 ("RO" Porsche reference) 
27:25 - 0.93:1 
26:25 - 0.96:1
26:26 - 1.00:1
25:26 - 1.04:1  
25:27 - 1.08:1 
24:27 - 1.13:1  
24:28 - 1.16:1   
23:27 - 1.17:1   
23:28 - 1.22:1   
23:29 - 1.26:1   
21:27 - 1.29:1   
22:29 - 1.32:1  
21:29 - 1.38:1   
21:30 - 1.43:1 ("LU" Porsche reference)   
21:31 - 1.48:1    
20:31 - 1.55:1   
20:32 - 1.60:1 ("KW" Porsche reference)   
20:33 - 1.65:1 
22:37 - 1.68:1 

Diagram ref no 3 and 4

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91530290474

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5th gear set for 915 gearbox

Fits:
Porsche 911 - 1972 to 1986 
For 915 gearbox

Available with different gear ratios - example - 9:38 (number of teeth on each gear) - 4.22:1 (gear ratio)

32:19 - 0.59:1
31:21 - 0.68:1
29:21 - 0.72:1
29:22 - 0.76:1
29:23 - 0.79:1
28:23 - 0.82:1
28:24 - 0.86:1
27:24 - 0.89:1
27:25 - 0.93:1
26:25 - 0.96:1
26:26 - 1.00:1
25:26 - 1.04:1
25:27 - 1.08:1
24:27 - 1.13:1
23:28 - 1.22:1

Diagram ref no 5

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92330290553

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Mainshaft and 1st gear set for 915 gearbox

Fits:
Porsche 911 - 1972 to 1986 
For 915 gearbox

Available with different gear ratios - example -17:34 (number of teeth on each gear) - 2.00:1 (gear ratio)

17:34 - 2.00:1
16:35 - 2.19:1
14:31 - 2.21:1
15:36 - 2.40:1
14:37 - 2.64:1
14:39 - 2.79:1
12:34 - 2.83:1
11:35 - 3.18:1

Diagram ref no 1

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91530292116

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Gear wheel pair for reverse gear wheel



Fits:
Porsche 911 1970-77 4- and 5-speed Manual Transmission
Porsche 911 1978-86 5-Speed Manual Transmission

Click 'Zoom in' for large parts diagram.
Diagram ref no 6

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91530291205

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Ring gear and pinion shaft set for 915 gearbox

Fits:
Porsche 911 - 1972 to 1986

Available with different gear ratios - example - 10:31 (number of teeth on each gear) - 3.10:1 (gear ratio)

10:31 - 3.10:1
8:31 - 3.875:1 
8:35 - 4.375:1 
7:31 - 4.43:1

Diagram ref no 6

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91530291116

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Ring and Pinion 8:35 (for 915 gearbox) (4.38) - Made in Germany

Fits:
Porsche 911 1972-86 with 915 Gearbox

Diagram ref no 9

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91530291102

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Shaft and 1st gear set 11:35



Fits:
Porsche 911 1974 to 1977 with transmission code 915.06/43/65/66
Porsche 911 1978 to 1983; with transmission code 915.61/62
Porsche 911 1984 to 1986; with transmission code 915.64/69/72

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Diagram ref no 1

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91530292116

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Uprated 2nd gear set 915 gearbox. 



Fits:
Porsche 911 - 1969 to 1986 
For 915 gearbox

Uprating or modifying your 915 gearbox? Choose from the gear ratios shown below

• High grade fine-grained 9310 VAR alloy steel material
• CNC-machined
• Formula One tooth profile
• Shot-peened
• REM-polished
  

Click 'Zoom in' for large parts diagram.
Diagram ref no 5

Uprated 3rd gear set 915 gearbox. 



Fits:
Porsche 911 - 1969 to 1986 
For 915 gearbox

Uprating or modifying your 915 gearbox? Choose from the gear ratios shown below

• High grade fine-grained 9310 VAR alloy steel material
• CNC-machined
• Formula One tooth profile
• Shot-peened
• REM-polished
  

Click 'Zoom in' for large parts diagram.
Diagram ref no 3

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92330290323

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Uprated 4th gear set 915 gearbox. 



Fits:
Porsche 911 - 1969 to 1986 
For 915 gearbox

Uprating or modifying your 915 gearbox? Choose from the gear ratios shown below

• High grade fine-grained 9310 VAR alloy steel material
• CNC-machined
• Formula One tooth profile
• Shot-peened
• REM-polished
  

Click 'Zoom in' for large parts diagram.
Diagram ref no 4


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91530290440

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Uprated 5th gear set 915 gearbox. 



Fits:
Porsche 911 - 1969 to 1986 
For 915 gearbox

Uprating or modifying your 915 gearbox? Choose from the gear ratios shown below

• High grade fine-grained 9310 VAR alloy steel material
• CNC-machined
• Formula One tooth profile
• Shot-peened
• REM-polished
  

Click 'Zoom in' for large parts diagram.
Diagram ref no 5

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91530290582

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Uprated mainshaft and 1st gear set for 915 gearbox. 



Fits:
Porsche 911 - 1972 to 1986 
For 915 gearbox

Uprating or modifying your 915 gearbox? Choose from the gear ratios shown below

• High grade fine-grained 9310 VAR alloy steel material
• CNC-machined
• Formula One tooth profile
• Shot-peened
• REM-polished
  

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

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91530292114

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