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Rover PG1 gearbox

2025-01-02T14:12:57Z

Formi: /* Suitable drive shaft seals */

[[Image:pg1.jpg|thumb|right]]
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 ==
[[Image:pg1_serial_number.png|thumb|left|Series number location on the bell housing]]
Identification is via the serial number on the bell housing housing;

=== Gearbox Application Table ===
{| border=1 cellpadding=5 cellspacing=0
! Gearbox Code !! 1 !! 2 !! 3 !! 4 !! 5 !! Final Drive !! Used In
|-
| G6BP || 3.250 || 1.895 || 1.308 || 1.033 || 0.848 || 3.938 || S2 111S (WR "long" box)
|-
| C4BP || 3.167 || 1.842 || 1.308 || 1.033 || 0.765 || 4.200 || MGF VVC/Trophy (as standard but final drive 4.2)
|-
| C6BP || 3.167 || 1.842 || 1.308 || 1.033 || 0.765 || 3.938 || Elise S1 standard and MGF
|-
| B4BP || 2.923 || 1.750 || 1.308 || 1.033 || 0.848 || 4.200 || S1 111S & S1 Sports 135 & S2 135R & S2 standard (CR Box)
|-
| NA || 3.167 || 1.842 || 1.308 || 1.033 || 0.848 || 4.200 || Elise-spares
|-
| 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)
|-
| B6BST || 2.923 || 1.750 || 1.308 || 1.033 || 0.848 || 3.938 || Rover "BRM" 200 - CR box with std final drive & torsen LSD
|-
| 340R UCR || 3.000 || 1.937 || 1.556 || 1.273 || 1.043 || 3.920 || 340R LOTAC05255 Conversion
|-
| NA || 3.167 || 1.842 || 1.410 || 1.100 || 0.909 || 3.938 || Eliseparts
|-
| G4BSV || 3.250 || 1.894 || 1.307 || 1.033 || 0.848 || 4.200 || MG ZR 160 VVC
|-
| M4BSQ || 2.923 || 1.894 || 1.500 || 1.269 || 1.034 || 4.200 || MG ZR Motorsport Vehicles
|}

=== Gearbox Codes ===
The first letter is the gearset

{| border=1 cellspacing=0 cellpadding=5
! Letter !! 1 !! 2 !! 3 !! 4 !! 5
|-
| B || 2.923 (13/38)|| 1.750 (20/35)|| 1.308 (26/34)|| 1.033 (30/31)|| 0.848 (33/28)
|-
| C || 3.167 (12/38)|| 1.842 (19/35)|| 1.308 (26/34)|| 1.033 (30/31)|| 0.765 (34/26)
|-
| G || 3.250 (12/39)|| 1.895 (19/36)|| 1.308 (26/34)|| 1.033 (30/31)|| 0.848 (33/28)
|-
| K || 2.923 (13/38)|| 1.750 (20/35)|| 1.222 (27/33)|| 0.935 (31/29)|| 0.765 (34/26)
|-
| 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 = 3.938 (16/63)

7 = 3.647 (17/62)

The next letter denotes the speedo gear type, always B for Lotus (note that the speedo cable is not used on the Elise). Then a clutch release code, usually P which is a type of hydraulic release specific to mid-engined cars. These may be followed by other letters, but on a Lotus only a Q or T for the type of limited slip differential:

BP = Open

BPQ = Quaife LSD

BST = Torsen

=== Suitable drive shaft seals ===

Brand: Corteco

1x Part no 19016560B (40X62X8/11.5)

1x Part no 19026209B (40X76X9/12,50)

== See also ==
* [[Gearbox switch|Gearbox Reversing Switch]]
* [[Gearbox oil|Gearbox oil]]
* http://forums.seloc.org/t/96372
* http://forums.seloc.org/t/110925

== External links ==
* http://www.gearboxman.co.uk
* http://superlightr300.free.fr/Manuels%20et%20Docs%20techniques/VVC_brochure_product.pdf
*: WARNING - The Lotus line is '''wrong''' on the Powertrain brochure, as it has the B4 CR code but the G6 WR ratios
* http://www.quaife.co.uk/
* http://arc.seloc.org/viewthread.php?tid=173780 Gearbox drive program
* http://wiki.seloc.org/a/Shimming_the_Powertrain_PG1_gearbox
* http://www.rover-coupe.com/rcoc/index.php/downloads
[[Category:Transmission]]
[[Category:Lotus Elise]]
[[Category:S1]]
[[Category:S2]]

Rover PG1 gearbox

2025-01-02T14:12:32Z

Formi:

[[Image:pg1.jpg|thumb|right]]
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 ==
[[Image:pg1_serial_number.png|thumb|left|Series number location on the bell housing]]
Identification is via the serial number on the bell housing housing;

=== Gearbox Application Table ===
{| border=1 cellpadding=5 cellspacing=0
! Gearbox Code !! 1 !! 2 !! 3 !! 4 !! 5 !! Final Drive !! Used In
|-
| G6BP || 3.250 || 1.895 || 1.308 || 1.033 || 0.848 || 3.938 || S2 111S (WR "long" box)
|-
| C4BP || 3.167 || 1.842 || 1.308 || 1.033 || 0.765 || 4.200 || MGF VVC/Trophy (as standard but final drive 4.2)
|-
| C6BP || 3.167 || 1.842 || 1.308 || 1.033 || 0.765 || 3.938 || Elise S1 standard and MGF
|-
| B4BP || 2.923 || 1.750 || 1.308 || 1.033 || 0.848 || 4.200 || S1 111S & S1 Sports 135 & S2 135R & S2 standard (CR Box)
|-
| NA || 3.167 || 1.842 || 1.308 || 1.033 || 0.848 || 4.200 || Elise-spares
|-
| 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)
|-
| B6BST || 2.923 || 1.750 || 1.308 || 1.033 || 0.848 || 3.938 || Rover "BRM" 200 - CR box with std final drive & torsen LSD
|-
| 340R UCR || 3.000 || 1.937 || 1.556 || 1.273 || 1.043 || 3.920 || 340R LOTAC05255 Conversion
|-
| NA || 3.167 || 1.842 || 1.410 || 1.100 || 0.909 || 3.938 || Eliseparts
|-
| G4BSV || 3.250 || 1.894 || 1.307 || 1.033 || 0.848 || 4.200 || MG ZR 160 VVC
|-
| M4BSQ || 2.923 || 1.894 || 1.500 || 1.269 || 1.034 || 4.200 || MG ZR Motorsport Vehicles
|}

=== Gearbox Codes ===
The first letter is the gearset

{| border=1 cellspacing=0 cellpadding=5
! Letter !! 1 !! 2 !! 3 !! 4 !! 5
|-
| B || 2.923 (13/38)|| 1.750 (20/35)|| 1.308 (26/34)|| 1.033 (30/31)|| 0.848 (33/28)
|-
| C || 3.167 (12/38)|| 1.842 (19/35)|| 1.308 (26/34)|| 1.033 (30/31)|| 0.765 (34/26)
|-
| G || 3.250 (12/39)|| 1.895 (19/36)|| 1.308 (26/34)|| 1.033 (30/31)|| 0.848 (33/28)
|-
| K || 2.923 (13/38)|| 1.750 (20/35)|| 1.222 (27/33)|| 0.935 (31/29)|| 0.765 (34/26)
|-
| 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 = 3.938 (16/63)

7 = 3.647 (17/62)

The next letter denotes the speedo gear type, always B for Lotus (note that the speedo cable is not used on the Elise). Then a clutch release code, usually P which is a type of hydraulic release specific to mid-engined cars. These may be followed by other letters, but on a Lotus only a Q or T for the type of limited slip differential:

BP = Open

BPQ = Quaife LSD

BST = Torsen

=== Suitable drive shaft seals ===

Brand: Corteco

1x Part no 19016560B (40X62X8/11.5)
1x Part no 19026209B (40X76X9/12,50)

== See also ==
* [[Gearbox switch|Gearbox Reversing Switch]]
* [[Gearbox oil|Gearbox oil]]
* http://forums.seloc.org/t/96372
* http://forums.seloc.org/t/110925

== External links ==
* http://www.gearboxman.co.uk
* http://superlightr300.free.fr/Manuels%20et%20Docs%20techniques/VVC_brochure_product.pdf
*: WARNING - The Lotus line is '''wrong''' on the Powertrain brochure, as it has the B4 CR code but the G6 WR ratios
* http://www.quaife.co.uk/
* http://arc.seloc.org/viewthread.php?tid=173780 Gearbox drive program
* http://wiki.seloc.org/a/Shimming_the_Powertrain_PG1_gearbox
* http://www.rover-coupe.com/rcoc/index.php/downloads
[[Category:Transmission]]
[[Category:Lotus Elise]]
[[Category:S1]]
[[Category:S2]]

Gearbox oil

2022-03-03T20:19:27Z

Formi: /* Makes */

== Rover PG1 ==

The service manual says your [[Rover PG1 gearbox]] id ''filled for life'', and requires no periodic renewal. However, some people choose to replace the oil in sync with their ''C'' service. Some have commented that a better oil can improve gear change and reduce noise.

PG1 needs API GL4 spec for the synchros.

Dry fill capacity = 2.4 litres<br>

Refil = 2.1 litres

=== Makes ===
* Texaco MTF94 (OEM)
* [http://www.morrislubricantsonline.co.uk/scripts/prodView.asp?idproduct=67 Lodexol MTF GL4 75W80] is PG1 specific direct replacement for MTF94
* Amsoil MTG 75w 90 Sold by Opie Oils or www.Performanceoilsltd.co.uk
* Castrol TAF-X -> Castrol Syntrans Transaxle -> Castrol Manual Transmax 75W-90
* Castrol SMX-S
* [http://www.motul-oil.co.uk/pdfs/gear-oil/Gear_300_75W-90_TDS_(GB).pdf Motul Gear 300]
* Silkolene Syn 5 75w-90
* Unipart GUL2622
* [http://www.mpmoil.nl/index.php?id=products&product=18000hr&language=en MPM 18000HR - GEARBOX OIL HONDA ROVER (75W-90)]

You can get MTF94 from Land Rover (part no STC9158 for 1L, part no STC 9157 for 5L) or online here: [http://www.lrseries.com/shop/product/listing/12711/STC9157-TRANSMISSION-OIL-5LTR.html]

== Honda M6T ==

The Honda gearbox is also normally considered ''filled for life'', but the OEM gearbox oil is quite thin and some people change it for a more viscous gearbox oil to cope with high temperatures (eg. heavy track use) better.

Dry fill capacity = 1.7 litres<br>
Refil = 1.5 litres

=== Makes ===
* Honda OEM MTF-III part number 08798-9031
* Silkolene Syn 5 75w-90

== Toyota C64 ==

Fitted in all the [[Toyota engines#2ZZ-GE|2ZZ-GE]] engined Lotus cars including the [[Elise model history#Elise 111R Introduction: January_2004|Elise 111R]], [[Elise model history#Introduction of Elise SC:_February_2008|Elise SC]], [[Elise model history#2004 Exige Introduction: March 2004|all S2 Exige variants]] and the [[Elise model history#2-Eleven Introduction: May 2007|2-11]] (GT4 excluded).

The Lotus service manual recommends changing your gearbox oil every 6 years or 45,000 miles (whichever is soonest). Some recommend the use of Redline MT-90 75W/90 over the standard Lotus specified SAE 75W/90 synthetic gearbox oil, as it can improve gear shift feel.

Viscosity = SAE 75W/90

Quality Standard = API GL-4 or GL-5

Dry fill capacity = 2.3 litres (2.4 US qt)

=== Makes ===
* Redline MT-90 75W/90

[[Category:Transmission]]
[[Category:Fluid]]