Difference between revisions of "Rover PG1 gearbox"

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! Gearbox Code !! 1 !! 2 !! 3 !! 4 !! 5 !! Final Drive !! Used In
 
! Gearbox Code !! 1 !! 2 !! 3 !! 4 !! 5 !! Final Drive !! Used In
 
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|-
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| C6BP  || 3.167 || 1.842 || 1.307 || 1.033 || 0.765 || 3.938 || Elise S1 standard and MGF
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| C6BP  || 3.167 || 1.842 || 1.308 || 1.033 || 0.765 || 3.938 || Elise S1 standard and MGF
 
|-
 
|-
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| C4BP  || 3.167 || 1.842 || 1.307 || 1.033 || 0.765 || 4.200 || MGF VVC (as standard but final drive 4.2)
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| C4BP  || 3.167 || 1.842 || 1.308 || 1.033 || 0.765 || 4.200 || MGF VVC (as standard but final drive 4.2)
 
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|-
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| B4BP  || 2.923 || 1.750 || 1.307 || 1.033 || 0.848 || 4.200 || S1 111S & S1 Sports 135 & S2 135R & S2 standard (CR Box)
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| B4BP  || 2.923 || 1.750 || 1.308 || 1.033 || 0.848 || 4.200 || S1 111S & S1 Sports 135 & S2 135R & S2 standard (CR Box)
 
|-
 
|-
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| B4BPU || 2.923 || 1.750 || 1.307 || 1.033 || 0.848 || 4.200 || Exige S1 uprated (CR Box)
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| B4BPU || 2.923 || 1.750 || 1.308 || 1.033 || 0.848 || 4.200 || Exige S1 uprated (CR Box)
 
|-
 
|-
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| B4BPQ || 2.923 || 1.750 || 1.307 || 1.033 || 0.848 || 4.200 || Exige S1 with LSD (CR Box)
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| B4BPQ || 2.923 || 1.750 || 1.308 || 1.033 || 0.848 || 4.200 || Exige S1 with LSD (CR Box)
 
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|-
 
| G6BP  || 3.250 || 1.895 || 1.308 || 1.033 || 0.848 || 3.937 || S2 111S (WR "long" box)
 
| G6BP  || 3.250 || 1.895 || 1.308 || 1.033 || 0.848 || 3.937 || S2 111S (WR "long" box)

Revision as of 08:52, 17 November 2007

Pg1.jpg

The Rover PG1 gearbox fitted to the K series Elise, was manufactured by Powertrain Limited (who have now ceased trading), is a five-speed constant mesh gearbox, which employs helical gears for speed transmission and final drive. The transmission castings are full aluminium construction and all other components optimised for improved weight (36kg dry). The gearbox can be supplied with either a standard open differential or a Limited Slip Differential, presently Torsen.

Due to the modular design of the gearbox various final drive ratio and 1st to 5th gear ratio combinations have been used. Including both present and past an overall total of 21 ratio combinations, 5 speedometer gear ratios; and 7 clutch levers designs for both hydraulic and cable operation can be called on to ensure the customers requirements are met.

Gearbox type

Series number location on the bell housing

Identification is via the serial number on the bell housing housing;

Gearbox Application Table

Gearbox Code 1 2 3 4 5 Final Drive Used In
C6BP 3.167 1.842 1.308 1.033 0.765 3.938 Elise S1 standard and MGF
C4BP 3.167 1.842 1.308 1.033 0.765 4.200 MGF VVC (as standard but final drive 4.2)
B4BP 2.923 1.750 1.308 1.033 0.848 4.200 S1 111S & S1 Sports 135 & S2 135R & S2 standard (CR Box)
B4BPU 2.923 1.750 1.308 1.033 0.848 4.200 Exige S1 uprated (CR Box)
B4BPQ 2.923 1.750 1.308 1.033 0.848 4.200 Exige S1 with LSD (CR Box)
G6BP 3.250 1.895 1.308 1.033 0.848 3.937 S2 111S (WR "long" box)
NA 3.167 1.842 1.410 1.100 0.910 3.938 Eliseparts

Gearbox Codes

The first letter is the gearset

Letter 1 2 3 4 5
b 2.923 1.750 1.308 1.033 0.848
c 3.167 1.842 1.308 1.033 0.765
g 3.250 1.895 1.308 1.033 0.849
k 2.923 1.750 1.222 0.935 0.765
l 2.923 1.750 1.222 0.848 0.649
m 3.167 1.842 1.222 0.848 0.649
r 3.250 1.895 1.308 1.033 0.765
s 3.250 1.895 1.222 0.848 0.649
t 3.250 1.895 1.222 0.935 0.714
v 3.250 1.895 1.222 0.935 0.765
w 3.167 1.842 1.308 1.033 0.714


The number that follows the gear set number is the Final drive ratio

4 = 4.200 (15/63)

5 = 4.062 (16/65)

6 = 3.937 (16/63)

7 = 3.647 (17/62)


The right hand letters are the diff

BP = Open

BPQ = LSD

BST = Torsen

Gearbox oil

  • Texaco MT94
  • Castrol TAF-X
  • Castrol SMX-S


See also

External links

Retrieved from ‘https://wiki.seloc.org/index.php?title=Rover_PG1_gearbox&oldid=6459’