Unveiled at the 1989 Frankfurt Motor Show, the Opel Calibra shook up the coupé segment, which had until then been dominated by Japanese manufacturers. The successor to the Manta, this elegant coupé prioritises handling and agility. Depending on the version, it comes with either front-wheel drive or four-wheel drive, which has a direct bearing on how the Opel gearbox is maintained. This guide walks you through everything you need to know about maintaining and repairing the transmission on your Calibra.
A Transmission That Evolved Across the Range
Early Calibras were front-wheel drive, with engine power delivered to the front wheels. When the turbocharged 4x4 version arrived in 1991, four-wheel drive became available: a transfer case distributes torque between the axles. The gearbox itself comes as either a five-speed manual (six-speed on the turbo 4x4) or an automatic, depending on the engine. For a clear overview of the pros and cons of each, our article on the differences between manual and automatic gearboxes is well worth a read.
Why Gearbox Oil and Oil Changes Matter
The Role of Transmission Oil
Gearbox oil lubricates all the internal components, helps dissipate heat, and picks up metallic particles. Over time it becomes saturated and loses its effectiveness, which can lead to problems. Check the fluid level and condition periodically: oil that has turned black is a clear sign that a change is overdue. A manual gearbox is very hardwearing, whereas an automatic requires closer attention.
Key Steps for an Oil Change
Start by consulting your service booklet to select the correct oil for your version. With the vehicle stationary and raised, place a drain tray beneath the sump, remove the drain plug and allow the fluid to drain fully. Fit a new O-ring to ensure a proper seal, refit the plug, then top up with fresh oil to the level indicated between the two marks on the dipstick. Start the engine, drive through each gear including reverse, then check for any leaks.
Diagnosing More Serious Faults
Some faults go beyond a simple oil change and require assessment by a professional mechanic. Describe any noises, smells, vibrations or slipping sensations you have noticed. When the damage is too severe, a complete gearbox replacement becomes unavoidable. Avoid the cost of a new unit with our reconditioned gearboxes, available in our catalogue of reconditioned gearboxes and in the Opel gearbox range. If you own a related model, you may also find our articles on the Opel Omega gearbox and the Opel Astra gearbox useful.
Maintaining the Four-Wheel-Drive System on the Turbo 4x4
On the turbo 4x4, the transfer case adds an extra component to keep an eye on. It distributes torque between the axles and has its own lubrication system, separate from that of the gearbox. A rumbling noise, vibrations when driving in a straight line, or unusual resistance can all point to wear in this assembly. On the Calibra, smooth, measured driving without harsh acceleration is kind to both the gearbox and the four-wheel-drive system. Checking fluid levels regularly and staying alert to the slightest symptom are your best defences against damage that could spread throughout the entire drivetrain.
Frequently Asked Questions
Is the Calibra available with four-wheel drive?
Yes, the turbo 4x4 version introduced in 1991 features four-wheel drive, assisted by a transfer case that distributes torque between the axles.
How often should the gearbox oil be changed?
A manual gearbox is very hardwearing and rarely needs an early oil change, unlike the automatic, which requires more regular servicing. Adjust the interval to suit your driving habits.
Do your reconditioned gearboxes come with a warranty?
Yes, they come with a warranty of up to 24 months and a satisfaction-or-money-back guarantee, subject to our Terms and Conditions.
Can I pay in instalments?
Yes, you can pay in up to 10 instalments. Delivery covers France and the European Union, with a lead time confirmed on your quote.
Why Choose EDEN BOITES?
Every EDEN BOITES gearbox is stripped down component by component, cleaned, rebuilt and tested by our team. The result: a transmission that performs like new, at a fraction of the cost and with a lower environmental impact. Browse our Opel gearboxes and get in touch with your registration number for personalised advice.
