356

901

915

928

930

924/944

968

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California Motorsports Inc.

 928-855-5755

cms@californiamotorsports.net

G50

993

986 Boxster

996

987 Boxster/Cayman

997

996T/997T/GT2/GT3

KIT CAR

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CMS PRODUCTS CATALOG

SPECIALS

 

PORSCHE G50 5 SPEED TRANSMISSION

(prices and availability are subject to change without notice)

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TRANSMISSION SPECIFICATION

·         Type:  G50/00, G50/01, G50/02

·         Original equipment for:  Porsche 911 Carrera 1987-1989

·         Description:  H Pattern 5 speed manual transaxle with Borg Warner single cone synchromesh and synchronized reverse

·         Limited Slip Differential:  40% LSD optional equipment

·         Weight (approx):  146lbs

·         Oil Capacity (approx):  3L API classification GL5 75/90

·         Speedometer:  Electric speedometer/hall sensor

·         Trans controls:  Rod linkage

·         Clutch:  Hydraulically assisted pull clutch, 240mm single plate

·         1st gear 3.500 (3.154 G50/02)

·         2nd gear 2.059 (1.895 G50/02)

·         3rd gear 1.409 (1.333 G50/02)

·         4th gear 1.13 (1.074 G50/00) (1.036 G50/02)

·         5th gear 0.89 (0.861 G50/00 and G50/02)

·         Final drive 3.44, 7.5”

 

Gear chart, G50/01 stock gears pdf

 

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TRANSMISSION SPECIFICATION

·         Type:  G50/50

·         Original equipment for:  Porsche 911/930 Turbo, 1989 only

·         Description:  H Pattern 5 speed manual transaxle with Borg Warner single cone synchromesh and synchronized reverse

·         Limited Slip Differential:  40% LSD optional equipment

·         Weight (approx):  156lbs

·         Oil Capacity (approx):  3.7L API classification GL5 75/90

·         Speedometer:  Electric speedometer/hall sensor

·         Trans controls:  Rod linkage

·         Clutch:  Hydraulically assisted pull clutch, 240mm single plate

·         1st gear 3.154

·         2nd gear 1.789

·         3rd gear 1.269

·         4th gear 0.967

·         5th gear 0.767

·         Final drive 3.44, 9”

 

Gear chart, G50/50 stock gears pdf

 

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TRANSMISSION SPECIFICATION

·         Trans type:  G50/03, G50/04, G50/05

·         Original equipment for:  Porsche 911/964 Carrera 2, 1990-1994

·         Description:  H Pattern 5 speed manual transaxle with Borg Warner single cone synchromesh and synchronized reverse

·         Limited Slip Differential:  40% LSD optional equipment

·         Weight (approx):  146lbs

·         Oil Capacity (approx):  3.6L API classification GL5 75/90

·         Speedometer:  None

·         Trans controls:  Rod linkage

·         Clutch:  Hydraulically assisted pull clutch, 240mm single plate

·         1st gear 3.500

·         2nd gear 2.059 (1.90 G50/04)

·         3rd gear 1.407 (1.33 G50/04)

·         4th gear 1.086 (1.03 G50/04)

·         5th gear 0.868

·         Final drive 3.444, 7.5” (3.33 G50/05)

 

Gear chart, G50/03 stock gears pdf

 

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TRANSMISSION SPECIFICATION

·         Type:  G64/00, G64/01

·         Original equipment for:  Porsche 911/964 Carrera 4 AWD, 1989; 1991-1994

·         Description:  H Pattern 5 speed manual transaxle with Borg Warner single cone synchromesh and synchronized reverse

·         Limited Slip Differential:  Variable (0-100%) with longitudinal lock

·         Weight (approx):  176lbs

·         Oil Capacity (approx):  3.8L API classification GL5 75/90

·         Speedometer:  None

·         Trans controls:  Rod linkage

·         Clutch:  Hydraulically assisted pull clutch, 240mm single plate

·         1st gear 3.500

·         2nd gear 2.118

·         3rd gear 1.444

·         4th gear 1.086

·         5th gear 0.868

·         Final drive 3.44, 7.5”

 

Gear chart, G64/00 stock gears pdf

 

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TRANSMISSION SPECIFICATION

·         Type:  G50/52

·         Original equipment for:  Porsche 911/930/965 Turbo, 1991-1994

·         Description:  H Pattern 5 speed manual transaxle with Borg Warner single cone synchromesh and synchronized reverse

·         Limited Slip Differential:  20/100% LSD standard equipment

·         Weight (approx):  156lbs

·         Oil Capacity (approx):  3.7L API classification GL5 75/90

·         Speedometer:  None

·         Trans controls:  Rod linkage

·         Clutch:  Hydraulically assisted pull clutch, 240mm single plate

·         1st gear 3.154

·         2nd gear 1.790

·         3rd gear 1.269

·         4th gear 0.967

·         5th gear 0.767

·         Final drive 3.44, 9”

 

GEAR CHART-STOCK GEARS G50/52 pdf

 

 

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CMS G50 TRANSMISSION REBUILDING, REPAIR AND MODIFICATION SERVICES

 

We offer a variety of services for your Porsche G50 transmission and would be happy to send you a quotation for any project however large or small!

 

·               Full transmission inspection

·               Full transmission overhaul

·               Ring and pinion setup

·               Gear change

·               Differential setup

·               LSD rebuild

·               Race prep

·               Prepare for inverted use

·               Shorten bell housing and input shaft

·               Re-register bell housing

·               Cut DME provisions in bell housing

·               Bore repair bell housing and center case

·               Main shaft straightening

·               Dog ring replacement, gear spot welding and honing

·               Internal spray bar oiling system

·               Custom MIG and TIG welding

·               Surface grinding

·               Throw Out Bearing boss/clutch release fork pivot shaft boss repair

 

 

 

CMS G50 INTERNAL OILING SYSTEM

 

Our G50 internal spray bar oiling system when used in conjunction with a remote pump*, will enhance lubrication to the entire gear cluster including the ring and pinion.  Using our oil pickup adapter* and where we locate the oil return, allows for plenty of room and easy access to external plumbing – where space is limited.

 

As we do not sell as a kit, you may send us your entire transmission** or just the parts we need for us to install.

 

$799

*sold separately

**an additional labor charge would apply

 

 

CMS_G50_993_oil_pickup

 

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CMS G50 OIL PICKUP ADAPTER

 

Allows you to scavenge oil from the side of a G50 5 or 6 speed transmission bell housing using the factory “blank” in the casting.  While some models are machined from the factory, most will need additional machine work.  This is a great solution for a G50 car with low ground clearance that needs an oil cooler.

 

·         Machined in house from 6061 billet aluminum

·         Nicely beveled edges; high attention to detail

·         VDO 300F temp sender included

·         -8AN adapter included

·         Mounting hardware included

·         For all G50’s ‘87-‘98 except C4 5 speed

·         Not for inverted/mid engine gearboxes

 

$235

 

Part number CMS.G50.OPA

 

 

5400

 

5398

 

CMS G50 1st/2nd BILLET SHIFT FORK

 

The weakest and most commonly broken shift fork in the G50 5 speed transaxle is the cast aluminum 1st/2nd shift fork.  Our newly designed fork is CNC machined beautifully from aircraft grade billet aluminum and offers the most strength over any fork in the aftermarket.  Our fork will also promote enhanced lubrication to 2nd gear as it better captures the idler gear when engaged.

 

Designed, manufactured and fit tested in house.

Fits all G50 5 speed transaxles 87-94.

 

$375

 

5403

 

 

 

g50 1st 2nd fork 3.gif

 

ALBINS G50 3rd/4th BILLET SHIFT FORK

 

The original steel fork is okay - it’s stronger than 1st/2nd, but it IS cast and will sometimes break or will simply wear out.  The roll pin provisions are also known to wear out causing failure.  A billet steel fork is the way to go if you’re looking to replace or upgrade.

 

Fits all G50 5 speed transaxles 87-94.

 

$595

 

 

cms_g50_billet_side_plate

Speed sensor version for 87-89

1954

Non speed sensor version for 90-94

1408

Turbo version for 91-94

CMS G50 BILLET SIDE PLATE

 

The original differential side cover is made of cast aluminum.  Under load there can be a tremendous force applied to this cover, and it can break, sometimes resulting in a damaged ring and pinion-or worse.

 

Upgrading to a billet side plate will add strength and increased reliability to the differential section.

 

Our design features include:

  • A provision for the OEM speed sensor for early models
  • An oil passageway for diff bearing
  • Uses the standard taper bearing, radial seal and O-ring
  • The turbo version further incorporates a thrust screw to reduce ring gear deflection under load

 

PRICING:

  • G50 billet side plate for 87-89 911 $425

Part number CMS.G50.BSP

  • G50 billet side plate for 90-94 964 C2 and 993 95-98 $425 Part number CMS.993.BSP
  • G50/52 billet side plate for 91-94 965 C2 Turbo $499

Part number CMS.GT3.BSP

Installation instructions pdf

 

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CMS CLUTCH RELEASE FORK PIVOT SHAFT - BOSS REPAIR

 

It’s not uncommon for the bosses that capture the pivot shaft for clutch release fork to crack or break off rendering your clutch inoperable.  We can professionally repair your bell housing for a fraction of what it costs to replace the housing or the entire transmission!

 

For all G50/993/996T/GT3 6 speeds.

 

$375 per boss, not including teardown and reassembly labor of the transmission.

 

Part number CMS.G50.TOBR

 

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CMS G50 BILLET SIDE SHIFTER CONVERSION

 

This patent pending design moves the main shift shaft to the side of the transaxle case allowing for a neat and tidy way of attaching shift cables.  Perfect for some mid-engine installations and especially where space is limited behind the transmission.

 

Shift cables can be attached or retrofitted to a variety of shifters including the CMS billet cable shifter.

 

  • $999 (not including teardown and rebuild labor)
  • $899 kit price (requires your gear housing and shift shaft)
  • Shift cables and cable brackets sold separately

 

Part number CMS.G50.BSS

 

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CMS G50 BILLET END CAP CONVERSION

(all models)

 

This conversion was originally designed for custom mid-engine installations, and is useful when installation space is limited as it will yield approx ½ inch of additional clearance at the tail of the gearbox.  The end plate is available in two versions, with and without the provision for the shift shaft.  This also works well for some rear engine applications.  The conversion (excluding C4) requires a different tail housing to be used.

 

$495

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ALBINS G50 GEARS

(all models excluding Carrera 4 with G64/00 or G64/01)

 

Stock gear ratios are designed for drivability and fuel economy and not necessarily for best performance.

 

Whether you have a stock motor or one that has been tuned your transmissions’ gear ratios may not be optimum for your driving needs.  Optimizing your gears to match your engines’ power curves can make a huge difference on the track, often resulting in reduced lap times, and can give the sensation that there has been a gain in power.  Alternative gear ratios can make the car more fun to drive or be more drivable.

 

We carry a wide selection of OEM and Albins gears to suit a variety of applications.

 

·         1st gear set (weld on type; requires core OEM input shaft; requires additional labor-not included in price) $995

·         2nd gear set $995

·         3rd, 4th or 5th gear set $995

 

G50 gear list pdf

 

3388

ALBINS G50 RING AND PINIONS

(all models excluding Carrera 4 with G64/00 or G64/01)

 

The overall gearing in your transaxle can be reduced or increased with alternative ratio final drive gears.

 

We offer OEM replacement sets as well as Albins made sets-and in ratios that the factory never produced.  These high quality hypoid gear sets are produced on the same cutting equipment and with the same design as OEM.

 

Ratios currently available are:

·         Albins 3.10/10:31 (special ratio for V8 and turbo applications) $3025

·         Albins 4.00/8:32 (improved street/autocross/track ratio) $3025

·         Albins 4.00/8:32 for G50/50 (improved street/autocross/track ratio) $3375

Gear chart, G50/01 with 3.10 pdf

Gear chart, G50/01 with 4.00 pdf

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clutch pack

 

KAAZ G50 LIMITED SLIP DIFFERENTIALS

 

Help put your power to the ground more effectively and add stability with a limited slip.  This is an improvement for a street car and a must for track car.

 

  • 12 plate design
  • High grade billet steel housing

·         1.5 way asymmetrical ramps or 2 way symmetrical ramps available, allowing for 12 possible internal settings total

  • Treated steel plates allow for smooth and quiet operation
  • Fits all G50 5 speed transmissions

 

Rebuild parts and services are also available.

EXPLODED VIEW

$1695

 

 

AXLE FLANGES

 

ALBINS G50 BILLET AXLE FLANGES

 

With big power and/or under extreme conditions the output flanges on your transaxle can be a weak link.  We have available Albins precision machined case hardened billet axle flanges which have been a proven product in off road racing for many years.  These flanges also promote more angular irregularity than the standard flanges with deeper cups.

 

Note: Not for use with standard CV grease caps

 

$299 each

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G50 STEEL SYNCHRO RINGS

(all models)

 

These GENUINE factory race parts provide a greater coefficient of friction, handle shock loads better, shift quicker and are more heat resistant than standard brass rings.  As found in RS Euro, RSR, GT2 and GT3 transmissions.

 

·         1st or 2nd steel ring $320 each

·         3rd, 4th or 5th steel ring $301 each

 

 

G50 dog ring

 

ALBINS G50 SYNCHRO TEETH

 

Sometimes termed as dog ring or synchro hub, these are the teeth that the shift sleeve or “slider” engages into.  If you have a bad synchronizer ring and if you have been grinding going into gear-you probably need to replace this part.  Another symptom is that your transmission won’t stay in gear. 

 

These are a direct replacement for both OEM and Albins gears.

 

·         1st/2nd dog ring $199 each

·         3rd/4th/5th dog ring $199 each

Fits Porsche G50 5 speed transmissions 87-94 C2/C4/Turbo

 

G50 pivot shaft

 

ALBINS HEAVY DUTY CHANGE LEVER PIVOT SHAFT

 

Replaces part number 950.303.134.01 and will not shear like the original part often does.  If a failure should occur, you cannot shift the gearbox.

 

$150