Holden Astra Gearbox & Transmission Problems

Rather than an internal transmission problem, this is probably a simple case of loose fittings where the selector meets the gearbox or even where the selector pivots inside the centre-console. The moving parts inside this mechanism can wear over time and lead to sloppiness in the shift lever itself. You can remove the centre-console panels and see for yourself if there’s excess play or movement in the connections. The fix might be new bushes or guides, but it shouldn’t be a huge job.

The jerk when you select reverse sometimes is definitely worth having diagnosed properly as it shouldn’t be that way. Scanning the car (which I’ll presume the dealership did to arrive at its answer) doesn’t always show up all faults, so just because the computer says there’s nothing wrong, doesn’t mean there isn’t. There are plenty of reasons for a car to jerk into a particular gear, but the good news is that the Astra uses a conventional, torque-converter automatic, not one of the vastly more troublesome double-clutch units.

Your second problem, however, may not be a problem at all. In fact, the gearbox in the Astra is smart enough to know that you’re coasting down a hill and will actually shift down a gear or two to take the strain off the brakes while still maintaining your speed. As it shifts down gears, the engine revs will rise; that’s absolutely normal and part of the way the car is designed to operate.

You could argue the semantics of what is and isn’t a major failure till the cows come home and still not get any joy. But while I’d still be talking to the dealership, I’d also contact Holden’s Customer Service department and explain the situation to see if it will overrule the dealership’s call on this. The number to call is 1800 46 465 336.

Meantime, if the car is fixed and working properly, what’s the problem? You could get a brand-new car and have exactly the same thing happen, so where do you draw the line on what’s acceptable and what’s not? Had Holden refused to fix the car or done a botched job that still left the car with problems, it would be a different story, but if the car is back to brand-new, I would consider the problem to be solved. I’m tipping head office will see it the same way.

The transmission in the Astra is a conventional torque convertor unit, the one that gave the trouble in the Cruze was dual-clutch manual/auto, a different ’box altogether.

Yes, it can be rebuilt or replaced and an automatic transmission specialist would be able to do that for you. Cost for the job would be around $2000 to rebuild or replace the transmission on a changeover basis.

That's a tough one, but you would have to think it's external to the transmission given it's twice been replaced. It could be a number of problems, from a speed sensor, the gear position switch or the ECU. The best thing is to get it to an auto transmission specialist and have it checked.

It isn’t a common problem, as it is on the BA/BF Falcon, but it is known to occur on the Astra. Because it has only done 92,000 km I would approach your dealer, and Holden, and request their help in covering the cost of the repair even though it is strictly out of warranty.

You're right to demand the gearbox be replaced or overhauled. At the very least it needs servicing, at the worst replacing as you have requested.

You certainly have had a bad run with your car and I can understand your frustration. Holden's offer is not a bad deal, but if you want to take it further you could go to the ACCC, or your local state government consumer affairs people. In Victoria, that's VCAT.

It's hard to be sure without driving it for a time and observing for the leak. Before taking delivery check the paperwork to see that the dealer has attended to the problem, and keep a copy of the vehicle inspection report for later reference if needed. It's not unusual for cars to develop oil leaks, most do.