Transmission Race Parts for 105/115 Series Alfa Romeo

Alfaholics Magnesium GTA Bellhousing – Cable Clutch Version - Transmission - 105/115 Series - Alfaholics

Alfaholics Magnesium GTA Bellhousing – Cable Clutch Version

£850.00 GBP (ex vat)

RCE60040

Premium quality Alfaholics production - a perfect copy of an original GTA magnesium bellhousing with all the correct casting marks. Cast using the latest grade of motorsport quality magnesium and supplied complete with cover plate studs installed and finished in a protective black chromate coating (as original). 'Alfaholics' logo cast into each bellhousing to distinguish it from an original GTA item.

Alfaholics Autodelta Magnesium Gearbox Tail Case - Transmission - 105/115 Series - Alfaholics

Alfaholics Autodelta Magnesium Gearbox Tail Case

£1250.00 GBP (ex vat)

RCE60020

Premium quality Alfaholics production - a perfect copy of the original Autodelta GTA magnesium gearbox tailcase from our Jochen Rindt car. To fit all 105 series gearboxes. All the original casting marks, including the upside-down 105.32 part number, have been incorporated. Cast using the latest grade of motorsport quality magnesium, it is supplied complete with breather plate and speedo drive studs installed and finished in a protective black chromate coating as original. 'Alfaholics' logo cast into each bellhousing to distinguish it from an original GTA item.

Alfaholics Autodelta Sliding Block Diff Casing – Aluminium - Transmission - 105/115 Series - Alfaholics

Alfaholics Autodelta Sliding Block Diff Casing – Aluminium

£1295.00 GBP (ex vat)

RCE60030/A

Premium quality Alfaholics production - a perfect copy of an original Autodelta GTA sliding block axle casing. All the original casting details have been observed and incorporated into the new castings. Cast using the latest grade of motorsport quality aluminium.  New pinion bearing housing sleeves precision machined from billet and pre-installed along with all new fixing studs for side tubes, sump and handbrake mechanism. Alfaholics logo cast into each item to allow future identification between our part and original items. This is the small housing size for use with small crownwheel & pinion & bearings, not GTV sized parts.

Alfaholics Autodelta Sliding Block Diff Case – Magnesium - Transmission - 105/115 Series - Alfaholics

Alfaholics Autodelta Sliding Block Diff Case – Magnesium

£1695.00 GBP (ex vat)

RCE60030

Premium quality Alfaholics production. As above but cast using the latest motorsport grade magnesium designed for use in stressed suspension applications.

Alfaholics GTA Close Ratio Gear Kit – REM Superfinished - Transmission - 105/115 Series - Alfaholics

Alfaholics GTA Close Ratio Gear Kit – REM Superfinished

£3650.00 GBP (ex vat)

RCE6008/7

As per above kit but put through a final REM Superfinish process. This process polishes the surfaces of the components at a particle level resulting in a super smooth chrome appearance finish. This finish results in the oil getting worked less hard inside the box resulting in reduced frictional losses - the result of this is a nett gain of BHP at the rear wheels.

Alfaholics Premium Quality Gearbox Rebuild Kit - Transmission - 105/115 Series - Alfaholics

Alfaholics Premium Quality Gearbox Rebuild Kit

£1290.00 GBP - £1295.00 GBP (ex vat)

PACK005/EAR

Full set of components required to rebuild all moly-synchro type 105 series gearboxes. The kit comprises our ultimate quality Alfaholics synchro rings & Alfaholics sleeves as well as our best quality gearbox bearings, oil seal and heavy duty rear mount. Please specify if you need a layshaft front bearing of 20mm or 25mm internal diameter. Please note that the synchros are not compatible with the first series of mechanical gearboxes (1963-1966) which featured non-moly synchros.

Alfaholics Quick Shift Kit - Transmission - 105/115 Series - Alfaholics

Alfaholics Quick Shift Kit

£625.00 GBP (ex vat)

ALF/QUICK

We have designed and developed this quick shift gear change kit to speed up the actuation ratio of the gear lever and thus improve gearshift times. Rather than manufacture an unsightly remote style gear lever which makes cars look heavily modified, we have CNC machined from billet a new set of gear linkage operating components to fit your gearbox so that the shifter rods themselves are moved at an increased rate for a given movement of the factory style gear lever. This means that your interior keeps its original appearance and the classic renowned Alfa gear lever is retained. We have designed the gear lever stub with a specific 2 degree offset for the gear lever angle to position it slightly towards the driver, the part is reversible so that in 1 orientation it is aligned for LHD and when spun around 180 degrees it aligns for RHD cars. This new system is far superior to the elongated adjustable angle that Alfa used, as that allowed the gear lever to work loose and rotate on its own under heavy use making the car undrivable. We have also uprated the pinch bolt to M8 sizing to ensure a firm and positive tightening [more]

Alfaholics Premium Quality Synchromesh Ring - Transmission - 105/115 Series - Alfaholics

Alfaholics Premium Quality Synchromesh Ring

£110.00 GBP (ex vat)

RCE6008/5

New production - exclusive to Alfaholics. We chose to manufacture these new premium quality synchro rings due to the continuing issues with the reproduction rings currently available on the market. It is common knowledge among Alfa racers round the world that the reproduction rings are not made to the correct tolerances and this leads to baulked gearchanges and premature molybdenum coating wear, particularly noticeable during track and fast road use. Until now there has been no solution to the problem, as only the standard reproduction rings have been available. Up until 10 years ago when the genuine Alfa synchro rings...

Alfaholics Premium Quality Synchromesh Sleeve - Transmission - 105/115 Series - Alfaholics

Alfaholics Premium Quality Synchromesh Sleeve

£140.00 GBP (ex vat)

RCE6008/6

New production - exclusive to Alfaholics.  We chose to manufacture these new premium quality synchro sleeves due to the availability of new original Alfa synchro sleeves finally ceasing in 2012. When this happened, we tried first to source the already available reproduction sleeves to try them out. When they arrived we noticed an obvious difference in tooth profile which made the rings hard to slide in and out of the sleeves on the bench. During driving, gear baulking, not dissimilar to using the cheap reproduction synchro rings was observed. At this point we knew that we had no option but...

Alfaholics GTA-R Steel Selector Fork Set - Transmission - 105/115 Series - Alfaholics

Alfaholics GTA-R Steel Selector Fork Set

£975.00 GBP (ex vat)

SRSFSET

Worn/damaged selector forks are becoming a bigger and bigger issue with Alfa gearboxes as they get older and increased performance & race use is highlighting the inherent design weaknesses of the standard parts. We have redesigned and manufactured these race quality forks by combining our considerable experience of high performance & motorsport use along with general modern motorsport knowledge to produce the ultimate selector fork set of 105/115 series gearboxes. We have added an additional pressure pad to control the synchro sleeve angle more accurately and to increase the total pad area and thus reduce pad wear rate, the net result is a sweeter and faster shift action. These forks are made of motorsport grade steel, so are also more resilient to abuse from over selecting than the factory bronze parts. As developed for and being used in our latest GTA-R builds.

Alfaholics Race Selector Rod For 3rd/4th Gear - Transmission - 105/115 Series - Alfaholics

Alfaholics Race Selector Rod For 3rd/4th Gear

£275.00 GBP (ex vat)

SROD34L

3rd/4th gear selector rod is an inherently weak part in the gearbox, the narrow width required as part of the gearbox design means that the clevis where the gear linkage drops into can easily get bent from ‘over-selecting’ gears. This risks a shift not fully selecting a gear and resultant massive gearbox damage. We have re-designed the part with greater radiuses and increased material thickness at the weak points and manufactured them from billet motorsport grade steel to make the part more resilient to this ‘over-selection’ based driver damage.

Synchro Brake Strap 1st Gear - Transmission - 105/115 Series - Alfaholics

Synchro Brake Strap 1st Gear

£25.00 GBP (ex vat)

STRP1ST

Premium quality Alfaholics production. Internal synchro strap for 1st gear, 1 required. We have made these to replace the often damaged part found fitted inside the synchro assembly. Typically these just get reused each time the gearboxes get rebuilt, but they are now getting to an age where these are simply damaged and will not allow the synchro to operate as it should.

Synchro Brake Strap 2/3/4/5 Gear – Pair - Transmission - 105/115 Series - Alfaholics

Synchro Brake Strap 2/3/4/5 Gear – Pair

£50.00 GBP (ex vat)

STRP2TO5

Premium quality Alfaholics production. Internal synchro strap for 2nd, 3rd, 4th & 5th gear, 2 required per gear. We have made these to replace the often damaged parts found fitted inside the synchro assemblies. Typically these just get reused each time the gearboxes get rebuilt, but they are now getting to an age where these are simply damaged and will not allow the synchro to operate as it should.

Gearbox Brake Sector – 1st Gear - Transmission - 105/115 Series - Alfaholics

Gearbox Brake Sector – 1st Gear

£29.95 GBP (ex vat)

GBOXBS1

Gearbox break sector  for 1st gear to suit all 105 gearboxes. 1 needed per box.

Gearbox Brake Sector - Transmission - 105/115 Series - Alfaholics

Gearbox Brake Sector

£29.95 GBP (ex vat)

GBOXBS

Gearbox brake sector for 2nd, 3rd, 4th & 5th gears to suit all 105 gearboxes. 4 required per gearbox.

Gearbox Reference Sector - Transmission - 105/115 Series - Alfaholics

Gearbox Reference Sector

£29.95 GBP (ex vat)

GBOXRS

Gearbox reference sector to suit all 105 gearboxes. 5 required per gearbox.

Alfaholics Production Early to Late Gearbox Synchromesh Conversion Kit - Transmission - 105/115 Series - Alfaholics

Alfaholics Production Early to Late Gearbox Synchromesh Conversion Kit

£1525.00 GBP (ex vat)

GRB/LCON

Full kit of parts to convert an early (101 & early 105) non-molybdenum synchromesh “yellow label” gearbox to later improved molybdenum coated synchros as per late “red label” gearboxes. Full set of all Alfaholics produced premium quality components, including synchro rings, synchro sleeves, brake straps, reference sectors and brake sectors for all 5 gears. A great upgrade when rebuilding any early gearbox with grooved synchos.

Alfaholics 6-Speed Sequential Gearbox Conversion - Transmission - 105/115 Series - Alfaholics

Alfaholics 6-Speed Sequential Gearbox Conversion

£6995.00 GBP (ex vat)

RCE6008/1

Developed exclusively in conjunction with the UK's leading motorsport transmission specialists, Quaife Engineering. This kit is a direct fit to all 105 series Alfa Romeos and uses the original bellhousing and clutch set up. We have a developed a bespoke gear ratio set with a 2.4:1 first gear, running through to a 0.889:1 6th gear, with the result that there is no need to change the standard Alfa rear axle ratio. Other ratio sets are available by special order. The kit is supplied as standard with a gearlever for manual shifting.  An optional ECU-controlled semi-automatic paddle shift system is available...

Alfaholics Semi-Automatic Gearchange Kit - Transmission - 105/115 Series - Alfaholics

Alfaholics Semi-Automatic Gearchange Kit

£4135.00 GBP (ex vat)

RCE6008/2

Designed for use with the Alfaholics 6-speed sequential gearbox. This kit allows full throttle clutchless upshifts and clutchless downshifts with throttle blipping to match engine revs to gear speed. The system incorporates the very latest 'closed-loop' software using an ECU in conjunction with feedback sensors to modify its own operation in response to the sensor inputs, all in real-time. It uses these sensors to monitor the gear position sensor to determine if and when a shift has been successfully completed. This information is fed back to the ECU so that the pneumatic actuator, engine torque reduction or throttle blip can...

Alfaholics Limited Slip Differential - Transmission - 105/115 Series - Alfaholics

Alfaholics Limited Slip Differential

£795.00 GBP (ex vat)

RCE6009/5

Superb new production, manufactured exclusively in the UK for Alfaholics by a state of the art limited slip diff manufacturer. These new diffs represent a huge leap forward in design over our old Gripper units. The old Gripper units used a basic uncoated steel friction plate design and, as a result, necessitated a very high preload setting in order to achieve the levels of friction required in a race diff. The new Alfaholics racing diff uses the same copper sintered friction plate design as developed by leading World Rally Car teams - M-Sport Ford and Prodrive Subaru. This high-friction coating...

Alfaholics Crown Wheel & Pinion Sets - Transmission - 105/115 Series - Alfaholics

Alfaholics Crown Wheel & Pinion Sets

£895.00 GBP (ex vat)

RCE6012

New premium quality Alfaholics production, manufactured in the UK to the very highest quality and exacting tolerances. We have taken the opportunity to improve the tooth cut profile for increased strength over the original cut used by Alfa. These crown wheel and pinion sets are available in the small 1300/1600/1750 size in 5.8, 5.3 & 4.3 ratios. Optimum performance can be achieved by fitting in conjunction with our Alfaholics Limited Slip Racing Differential. The 5.3 & 5.8 ratios are for intended for circuit racing, whilst the 4.3 option is the optimum ratio for fast road and trackday cars.

Full Rebuilt Kit for non-LSD type ‘Small’ Axle - Transmission - 105/115 Series - Alfaholics

Full Rebuilt Kit for non-LSD type ‘Small’ Axle

£265.00 GBP (ex vat)

GRB200A

Full kit of best quality pinion and diff case bearings, pinion oil seal, diff sump gasket, rear wheel bearings and halfshaft oil seals. To fit all non-LSD axles (Sprint GT/GT Junior & 1750 - 25 spline halfshafts). Late model cars have press on shrink rings rather than screw on shrink rings, please check on post 1973 cars and order shrink rings separately if required.

Full Rebuild Kit for LSD type ‘Large’ Axle - Transmission - 105/115 Series - Alfaholics

Full Rebuild Kit for LSD type ‘Large’ Axle

£195.00 GBP (ex vat)

GRB200

Full kit of best quality pinion and diff case bearings, pinion oil seal, diff sump gasket, rear wheel bearings, press on shrink rings and halfshaft oil seals. To fit all larger type LSD axles (2000 GTV, Spider and Berlina - 27 spine halfshafts)

Differential Pinion Preload Shims - Transmission - 105/115 Series - Alfaholics

Differential Pinion Preload Shims

£9.95 GBP (ex vat)

16LSDS

When assembling a differential you will need to set both the pinion height (please see Pinion Height Shims listing) and the pinion preload using shims. These Alfaholics production pinion preload shims are manufactured from high grade carbon steel by an aircraft industry approved manufacturer. These shims are used by ourselves in all of our race and high performance road differential builds.

105 LSD Slip Plates - Transmission - 105/115 Series - Alfaholics

105 LSD Slip Plates

£55.00 GBP (ex vat)

RCE6011

Increase the limited slip action on your Alfa ZF type limited slip by fitting these extra slip plates in LSD unit. Fitted in pairs, to replace a pair of standard spacer plates.

Alfaholics Race Halfshaft – Solid - Transmission - 105/115 Series - Alfaholics

Alfaholics Race Halfshaft – Solid

£350.00 GBP (ex vat)

RCE9022

New design, premium quality and ultra strong. Available in both 25 spline 'GT Junior' and 27 spine 'GTV' sizes. These halfshafts feature a built in lock ring for the wheel bearing, making wheel bearing changes far simpler than ever possible with standard Alfa shafts. The end flange is scalloped for a useful weight saving.

Alfaholics Race Halfshaft  – Rifle Drilled - Transmission - 105/115 Series - Alfaholics

Alfaholics Race Halfshaft – Rifle Drilled

£495.95 GBP (ex vat)

RCE9024

As above shaft but rifle drilled, reducing weight by 0.8KG per shaft - 1.6KG total reducing in unsprung and rotational weight per axle! Available in 25 spline 'GT Junior' and 27 spline 'GTV' sizes

Alfaholics Competition Axle Units - Transmission - 105/115 Series - Alfaholics

Alfaholics Competition Axle Units

We offer full built axles for your trackday or competition car. With our guidance you can chose the ratio of your choice and have it built up into an axle using our competition LSD unit (in either trackday or race setting) with all brand new bearings, carefully shimmed and ready to fit into your car. This service is offered on exchange for your old axle, but outright purchases without exchange may also be possible in some circumstances.

Alfaholics Rear Propshaft Section - Transmission - 105/115 Series - Alfaholics

Alfaholics Rear Propshaft Section

£395.00 GBP (ex vat)

GRB102/1

Exclusively manufactured for Alfaholics to exacting tolerances. Most rear propshafts have had many UJ changes in their life and as a result can often have damaged UJ housings, this means that even with new UJs vibrations can still occur due to end float in the UJ housings which is beyond shimming out. The sliding joint is also another area for wear on an original unit that of course cannot ever be repaired. As a result of these 2 major factors we no longer use rebuilt rear propshafts in our workshop, fitting only our brand new unit for 100% perfect results...

Alfaholics Race Propshaft Conversion – Full Length – 105 Series - Transmission - 105/115 Series - Alfaholics

Alfaholics Race Propshaft Conversion – Full Length – 105 Series

£775.00 GBP (ex vat)

RCE6013/1

Ultra lightweight full length race-spec propshaft - just 7.9kg total weight including the heavy duty centre support! Manufactured exclusively for Alfaholics by Formula 1's choice balancing company using race-grade ultra stiff 2" diameter tube and fitted with 3 heavy duty race UJs. The UJs are also scalloped for additional weight saving. Once manufactured, the entire unit is balanced to 10,000rpm to ensure perfect balance at all speeds that it will experience in use.  It is worth remembering that all 105 series gearboxes run an overdrive 5th gear so the propshaft can spin somewhat faster than engine speed!  Those with experience...

Propshaft front coupling – Doughnut – Heavy Duty - Transmission - 105/115 Series - Alfaholics

Propshaft front coupling – Doughnut – Heavy Duty

£45.00 GBP (ex vat)

GRB107/1

Heavy duty version for fast road and trackday cars. For race cars see our race propshaft cnversion under Race & Performance 'Transmission' section

Propshaft centre support – late HD - Transmission - 105/115 Series - Alfaholics

Propshaft centre support – late HD

£49.95 GBP (ex vat)

GRB105

Heavy duty version of late support, ideal for trackday and race cars

Premium Quality Propshaft Centre Support Bearing - Transmission - 105/115 Series - Alfaholics

Premium Quality Propshaft Centre Support Bearing

£21.00 GBP (ex vat)

GRB106/1

Premium quality bearing to increase longevity and reliability.

Rear Wheel Bearing – Premium - Transmission - 105/115 Series - Alfaholics

Rear Wheel Bearing – Premium

£28.00 GBP (ex vat)

GRB212/1

Premium quality bearing version, much tigher tolerances for reduced 'pad knock back'.

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