Why Change an Expensive Assembly When a Few Bearings Will Solve the Concern- Pawlik Automotive Repair, Vancouver BC

Why Change an Expensive Assembly When a Few Bearings Will Solve the Concern

We recently serviced a defective angle gear unit on a 2003 Volvo V70 AWD. The angle gear unit is an important component of the Volvo all wheel drive system: it is a simple assembly that transfers power from the front transaxle to the driveshaft and transfer case unit in the rear. Inside the angle gear unit are two shafts both with 45 degree bevel gears. Each shaft has two bearings supporting them, allowing them to spin freely.

Our client came in concerned that the dealer had quoted her over $3000.00 to replace the unit and was wondering if there were less expensive options. After road testing the vehicle we concluded that there was likely only a worn out bearing inside the unit. Unfortunately there were no separate bearings or gears sold for the angle gear unit; it seemed our only option was to buy a completely rebuilt unit from Volvo and if this was the case our price would have been about the same as the dealer.

Determined to find a better priced solution it seemed a good idea to dismantle the angle gear unit, inspect it and see what damage was present. We did that and found one severely worn bearing on the pinion shaft. Normally when one bearing is bad it is best to replace them all as the others will likely wear our soon. Through a bearing supplier we were able to find all the bearings to repair the unit (there are four in total) however we spent a great deal of time trying to find the main pinion bearing as this was a highly specialized type of bearing.

The inner moving components of the angle gear unit. The arrow points to the worn pinion bearing. The angle gear unit is a very simple mechanical device: these are the only moving parts.

It’s very frustrating when an easily fixable item has no parts available. There is no earthly reason why Volvo could not be selling bearings for the angle gear unit as they sell bearings for most every other part of the vehicle. In the end we completed the job for under $2000, taxes included and the angle gear unit performed marvelously. It was only by our determination that were able to find the right parts to do the job. Whenever we can we will replace the basic parts, like worn bearings to save you money.

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