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73-87 Chevy _ GMC Trucks => Brakes, Frame, Steering & Suspension => Brakes and Braking Systems => Topic started by: Chevynut73 on June 28, 2023, 08:27:52 AM

Title: Replacing The Brake Power Booster - Issue
Post by: Chevynut73 on June 28, 2023, 08:27:52 AM

Took out the 50 year old Power Booster and was replacing it with a new one but ran into an issue - the original PB connector (the about 4" part that connects the rod from the PB to the brake pedal arm) will not screw/tread into the new one.
The new PB rod is a smaller diameter than original one and has course threads instead of fine threads. 

Any thoughts?

Thanks

Title: Re: Replacing The Brake Power Booster - Issue
Post by: Shifty on June 28, 2023, 10:09:15 AM

If you ordered a Cardone, it should be p/n# 54-71108.  What is the code on your old booster (should be a "T3")? 

Because 73-74 (assuming by your screename) are all that use the T3 rod, they might have used a more common core to build the new unit with.   If the rod is long enough, you may be able to pick up a new yoke at the local hardware store.  If you are trying to keep it original, you may have to R & R your unit.

Post the rod code, I'll help where I can.

Title: Re: Replacing The Brake Power Booster - Issue
Post by: Chevynut73 on June 30, 2023, 08:53:51 PM

You are right, the new one is a Cardone 54-71108 and appears to be 3/8" rod.

The original appears to be 7/16".  Not sure what the code is, will have to look this weekend (Truck is in neighbors shop.   

Thank you

Title: Re: Replacing The Brake Power Booster - Issue
Post by: Shifty on July 01, 2023, 12:05:21 PM

Should be able to pick up a clevis yoke at Ace in 7/16" if you have to. 

Title: Re: Replacing The Brake Power Booster - Issue
Post by: Chevynut73 on July 03, 2023, 08:35:43 AM

Excellent - i'll check into it.

Thank you