P&W Engineering specialises in reconditioning
and replacing Aston Martin gearboxes and 
transmissions for Aston Martin cars.

EXCEPTIONAL SERVICE AT COMPETITIVE RATES

As Aston Martin enthusiasts we have a combined
75 years experience reconditioning Aston Martin manual and Aston Martin automatic gearboxes for: DB5, DB6, DBV8, V12, DB9, V8 Vantage S,
V8 Vantage, Vanquish, V9, DBS

OUR SERVICES

  • Reconditioning / replacing Aston Martin gearboxes and transmissions
  • Supplying brand new 6 speed manual gearboxes for DB7V12 and Vanquish
  • New manual gearboxes to suit DB6 engines and Aston Martin V8 engines
  • Reconditioning manual TVR gearboxes
'I have been working with PW-Eng since 2005
and have always been extremely satisfied'
D.J. Smail

ASTON MARTIN
SPECIALISTS

MANUAL AND AUTOMATIC
GEARBOXES

 

The Gearbox

Aston Martins - as with any luxury and exclusive car, requires first class maintenance. Although Aston Martins are synonymous with excellence, elements such as gearboxes - need attention once in a while. The gearbox is an integral part of the running of the Aston's engine, and finding a quality replacement or conditioned gearbox is not the easiest of tasks.

What type of gearboxes do Aston Martins have?

ASTON MARTIN DB9 VOLANTE GEARBOX

Options are the Graziano-sourced six speed manual gearbox with twin plate clutch or the ZF sourced six speed automatic gearbox has seen improvements by utilising a new hydraulic control box. It comes with buttons to select the different models and an optional steering wheel mounted paddle shift.

Graziano are a gear and transmission manufacturer who supply Aston Martin, whilst ZF are one of the leading automotive suppliers, and whose gearboxes are used extensively.

ASTON MARTIN DB7 GEARBOX

The automatic gearbox is a fully automated ZF version - with gear changes on the steering wheel

ASTON MARTIN DB7 VANTAGE (1990-2003)

Borg Warner T-56 transmission - made of aluminium and brass synchros making up the synchromesh. P&W Engineering can supply reconditioned T-56 gearboxes. Originally made by Borg Warner, the T-56 is now made by Tremec.

ASTON MARTIN V8 VANTAGE GEARBOX

A Graziano transaxle which is used for both automatic and manual gearboxes.

ASTON MARTIN DBS V8 GEARBOX

The gearbox was the Chrysler 'Torqueflite' 3-speed automatic - Chrysler Corporations three speed automatic gearbox which was released in 1956.

ASTON MARTIN DB9 GEARBOX

A ZF six speed automatic gearbox which has a unique mechatronic unit for the Aston Martin.

ASTON MARTIN DB4 GEARBOX

A four speed all-synchromesh four speed unit, designed by David Brown.

AM V8 VANTAGE SPORTSHIFT

A fully automatic manual gearbox

Why Gearboxes?

Effectively a gearbox (or transmission) regulates the torque and ensures that the power of the engine is transferred effectively to the wheels. In layman's terms, an engine generates a lot of powers, but all at one rate. A car needs different levels of pwer depending whatspeed it is going at. There is an inverse relationship.

Low Gear:    Low speed and high power
High Gear:   High speed and low power

The gears within the gearbox (or transmission) have a computer which controls the changing of the gears, whilst very simply, with a manual gearbox, the driver controls when the gears are changed.

LOOKING FOR RECONDITIOINED ASTON MARTIN GEARBOXES? CONTACT US NOW

Gearbox Parts

Aston Martin gearboxes have a number of parts - which makes reconditioning rather than replacing with a new gearbox a viable option in certain situations.

Steel parts to the gearbox: eg shafts, planetary gear carriers etc
Gearbox cast parts: eg housings, hydraulic valve plates, small cast components etc
Geared components: Spur gears, geared chafts, bevel gears, sun gears, planetary gears, ring gears etc
Sheet metal parts: Fine-blanketed parts, formed parts etc
Other parts: Sealing elements, filters, standardised parts, add-on parts etc.

Gearbox Problems & Failings

Buying a new gearbox for your Aston Martin can be both expensive, and unnecessary.
Reconditioning your gearbox may be just as effective as replacing it, and can deal withthe following gearbox problems.

Wearing of seals

This will occur naturally over time with gearboc usage and can result in the seal wearing the shaft
counterface. Replacing the seal might not be sufficient as the shaft may need replacing by a new or
reconditioned one.

Bearings

Problems with the bearings in Aston Martin gearboxes can be due to the high loads thatthe gearbox
is subjected to, along with other causes such as unclean oil. Ultimately if the bearings are damaged
this may lead tofurther problems in the gearbox, such as the shaft or the housing bearings seats.

Gears

Generally problems with gears are caused by wear and tear and more intensive gearbox activity
than onother cars. Similarly, if the gearbox already has problems with bearings, or other
components, then the gears may also become damaged.

As mentioned, to stop an Aston Martin gearbox wearing and requiring reconditioning, transmissions use gear oil.
This lubricates and deals and reduces the negative impact of the sliding friction that constantly occurs when the gears make that contact. Some gearboxes require their oil changed more than others, with specific reference to the Aston Martin's with automatic gearboxes.

An Aston Martin gearbox is not a single component - Although there are lots of components, withmany of them
classified as gearbox parts which wear, they have been built for their inter-changeability of these parts, which allow both replacement and re-conditioning.

LOOKING FOR A RECONDITIONED ASTON MARTIN GEARBOX? CONTACT US NOW

Reconditioning a Gearbox

Manual gearboxes are generally simpler and easier to provide reconditioned models for, than automatic. All cars, including the Aston Martin, that have a manual gearbox have fewer moving parts. Conversely an automatic gearbox in an Aston Martin is not likely to last as long due to the extra mechanical difficulty. Aston Martin automatic gearboxes tend to need maintenance, reconditioning or replacement before the cars withthe manual gearboxes.

Gearboxes can have over 600 component parts (Oerlikon Graziano), and with the considerable cost of purchasing a new one, a reconditioned or remanufactured gearbox can be a sensible solution.

LOOKING FOR A RECONDITIONED ASTON MARTIN GEARBOX? CONTACT US NOW

Difference between a Manual and Automatic Gearbox

The real difference between a manual gearbox and an automatic gearbox is that with a manual gearbox different sets of gears are locked and unlocked tothe output shaft to get the various gear ratios. Automatic gearboxes are reputed to be between 4 and 6% less efficient than manual gearboxes. This was in large part due tothe torque converter slippage which occurs. The Aston Martin DB9 has a 0-60mph of 4.8 seconds. Ok, the difference isn't thatgreat - but it is all due to the gearbox.

Another difference is cost - generally an Aston Martin with a manual gearbox is cheaper than an automatic. The DB9 at time of writing had a £3,000 reduced pricetag for the manual version.

And then we have the 'Sportshift'. It is an automatic manual gearbox which is a two pedal version of the 6 speed manual. Built by Graziano and with input from Magneti Marelli, this gearbox and overall transmission is practically the same as is used by Ferrari and Maserati.

There are paddleshifters, attached to the steering colums and youcan choose the sport or comfort mode (the former is the default). Drive is fully automated, whilst the driver can control it as well. All of this makes the transmission more complicated however and at some stage a replacement gearbox with a reconditioned or new one may become a difficult question. As an aside, this semi automatic gearbox doesn't improve the Aston Martin's performance, but it does cost more!

Different gearboxes by Aston Martins

Graziano

Graziano is an Italian company focused on providing components for power transmissions. Providing gears, crown wheels and pinions (bevel gear sets), gearboxes and synchronisers, Graziano is a well known gearbox provider. Oerlikon Graziano is now a European market leader in high technology gearbox systems.

Oerlikon Graziano is probably most famous for its six speed transaxles. These are now standard fittings for high performance vehicles, not just Aston Martins, but also for Ferraris, Lamborghinis, Maseratis and Alfa Romeos. The Aston Martin DB9 automatic has been fitted with Oerlikon Graziano Rear Drive Module.

Although Oerlikon Graziano provides both after sales and spare parts, P & W Engineering can act on your behalf to ensure you get the best service and products.


ZF

ZF provides driveline and chassis technology, and is a leading worldwide automotive supplier. As a worldwide organisation, parts are provided for transmissions, and much more. ZF also provides remanufactured and repaired gearboxes for its customers - including Aston Martins

ZF was founded in 1915 to develop innovative products for optimal mobility. Gear wheels and transmissions for Zeppelins have led on toeven bigger things. Since then the company, which is now a leader in gearbox production and drive trains, also works toprovide complete remanufactured gearboxes and fully warrantied transmissions.

With a rich history and involvement in motor sport - from the 1930's to the current day, ZF transmissions and differentials have graced the likes of Mercedes, BMW roadsters, Lotus and the legendary Ford GT 40.


Chrysler Torqueflite

Introduced in 1956, the torqueflite was Chrysler's three speed automatic transmission. Used by all Chryslers, as well as by American Motors, vehicles such as Jeep, International Harvester and The Bristol all carried Chrysler gearbox. There have been cases where the Torqueflite gearbox from Chrysler has replaced Borg Warner transmissions - even though this seems to have happened more with trucks.

The torqueflite transmission was reputed in 1956 to be the simplest, more reliable, dependable, quiet, efficient and economical part which ultimately gave the vehicle a competitive edge. This dominance in the transmission market lasted until 1964.


Borg Warner

A global technology leader, Borg Warner has Drivetrain Group which is an industry innovator in transmission and drive technology. The Aston Martin DB5 and Aston Martin DB6 each utilised the Borg Warner automatic gearbox. Borg Warner have a range of automatic and manual transmissions which have been manufactured since 1940. Although not exclusively a gearbox specialist, gearboxes formed a large part of the business


David Brown

The Aston Martin DB4 Vantage uses a four speed all synchromesh gearbox unit, which was designed by David Brown transmissions, but assembled by Aston Martin at their factory in Newport Pagnell.

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