Lowering spindles?
 

I've located some lowering spindles. The spindle arms come with both spindles for the 1.0" or 1.25" thickness rotors. The problem is I would have to pressout the spindle from the arms and press in the correct spindle for my truck. Is this common?

Options=
Change out the spindles to fit and weld the spindle from the back side?
Hold off and find the right ones.

What determines the rotor size difference? Is there a rule of thumb?
Small block= 1.0"?
Big block1.25"?
Long bed 1.25"?
Tow package 1.25"
Mine is a shortbed L6 so I'm thinking I have the 1.0". It's too cold out for me to check tonight.

Re: Lowering spindles?
 

This is not common for a '73-'87 truck.

Sounds like some cheap Aim/Airbagit junk spindle.
Skip these.
Get a good quality spindle that is correct for your width rotor. Period.

Re: Lowering spindles?
 

I believe the 1" rotors started in 1981.
I never understood why GM made two different rotor thicknesses.

Re: Lowering spindles?
 

I'm no engineer, but It seems to me that a thicker rotor can take more heat w/o warping. If they did a 100% change in 81 I would think it was to either save money by buy less steel or because better material was available. Remember that one of the reasons new vehicles have thin panels is so car companies can save money, but the price of cars goes up every year??

Re: Lowering spindles?
 

No reason. No year specific.
Some trucks had 1" LD rotors and some had 1.25" HD rotors.
I assume the cheaper 6 cylinder/plain jain trucks got the lighter rotors.
My '86 silverado had 1.25" rotors,... and my '83 small block stepside (equipped with a lot of options) had 1" light duty rotors.
Who knows,...

Re: Lowering spindles?
 

yeah i got a fully loaded 84' silverado and it only had 1in rotors

Re: Lowering spindles?
 

wheres Keith when you need him? :lol: