Vintage A Stamp RC10 A-arms breaking axles on original car

[rbcross62]

Everyone,

Here's a question for those of you that know the RC10 rear suspension well. I have a stock RC10 with the original rear a-arms, dogbones, and axles. Recently, I broke an axle and couldn't figure out what had happened. After further investigation, it seems that the original shocks are too long and the hole in the a-arms has worn. Now, when the shocks are fully extended, the axle gets caught up in the a-arm opening and breaks when the motor forces the dogbone to rotate. This has just started recently and I am guessing that it is due to wear. Here's the problem, I'm not quite sure what is worn and what to replace to fix this issue. I looked at a few newer cars and the shocks don't seem to extend as far as the original shocks on the RC10. Did I assemble the shocks incorrectly back in 1984? Not certain how to fix this, please help!

Thanks!!

Rich

[farmer]

put limiters inside your shocks to reduce down travel(droop)

farmer

[crazyfingers]

Check the slots in the cups on the outdrive and the stub axle. Ive had them get so worn that the axle will bind and break.

[ASC6000]

The original build called for a 5/8ths inch space of fuel tubing on the inside. Also take the shock off the car then raise and lower the arm and notice that the arm has a "downstop" molded in where it hits the chassis(on the underside you'll see the "lip"), Iv'e seen those worn/damaged/modded and become nonfunctional. That can also happen if you don't have the spring in the cup. Other possibilities, 1.32 shafts in 1.02 bodies and odd mounting positions as well.
http://teamassociated.com/pdf/cars_and_trucks/RC10/Team/rc10_manual.pdf