Volvo 1031 rear axle, final drive ratio 3.15 - Crown Wheel and Pinion

Note! no Crush washer place and flange attachment with Dana 30 M20 nut.

Shimming The pinion shaft should be done with separate thin shims in the Volvo 1030 Dana 30 type, on the other hand, the Crush washer has a tendency to compress itself, e.g. when jumping, if the gimbal bottoms during a jump.

For this reason, the professionals also put a Volvo 1031 Crush washer in place of a solid large washer that has been turned several times, which does not compress, so this achieves the same result as in this rear clearance without a Crush washer.

This durable rear fairing has been used in a car with an engine power of approx. 650Hp, so it can withstand torque and power!

With this transmission, you get a durable Volvo 1031 with a big rear, because the pinion shaft gear is big and there is more contact surface at the same time.

However, you need a primary-geared direct-coupling gearbox to get the overall gear ratio suitable for rallying or the track.