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Join us as we walk you through a quick tech tip on how to diagnose and repair a possible spun brake drum. Learn the tricks for repairing your VW Brakes that you can't find anywhere else with JBugs Tech Tips Video Series
Tools you will need:Wheel ChocksJackJack Stands Ratchet1/2" Breaker Bar1/2" Extension19mm Socket36mm SocketNeedle Nose Pliers
Hello, Sam here with JBugs.com.
A few weeks ago I had to tow a coworkers
1967 Beetle. He came around a corner on his way to work and the engine suddenly
started revving, but the car wasn't moving. The transmission was in gear so he
suspected that perhaps the clutch or transmission went bad.
I had a different feeling so I asked
him for the keys and told him to watch the axle nuts on either side of the car.
I started the car and put into gear and slowly let out the clutch. Sure enough the left side axle was
spinning, but as you can see the car wasn't going anywhere.
So I loosened the lug bolts, pulled
the axle nut cotter pin, and removed the axle nut, which was finger tight. I
jacked up the car, set it on a stand, removed the four lug bolts that were
there Pulled off the wheel, and then slid off the drum. The splines inside the
drum were nearly completely gone and there were fine metal shavings inside the
drum and on the backing plate.
A few things can cause a spun drum.
The most common reasons is [are] the axle nut wasn't torqued tight enough or
the axle spacers have worn out and allowed the drum to loosen up. I grabbed the
new brake drum and a new set of lug bolts, so we'd have a set of five, and I
slid the new drum in place followed by the axle nut, the wheel, and the lug
I lowered the Beetle off the jack
stands and set it back on all four wheels and then I tightened all the lug
bolts. I tried to tighten the axle nut, [but I] discovered the threads were
missing, so I replaced it with a new axle nut. Most importantly I tightened it
to the two hundred and seventeen foot pounds of force needed using my weight
and a breaker bar.
With the axle nut torqued the new
cotter pin was slid in place and the ends were bent into place and it was time
to check the repair.
Sure enough! With the car in gear
the Beetle now moved as it should. This video isn't meant to be so much as a
tech tip but as a reminder. Make sure your rear axle nuts are extremely tight and
perhaps as maybe a helpful diagnosis if you happen to be driving your VW, and
suddenly you're going nowhere.
Thanks for watching and stop by
JBugs.com for all your vintage VW needs.