Forty Rear End Noise

bonesy

bonesy

Member
I'm tracking down a noise in a forty rear end. I'm getting a clunking and almost a grinding noise from the passanger side.

I'll pull the hub and check it out. But upon jacking up the car, I noticed the axle can move in and out laterally about a 1/16". Is that OK?

While I'm asking questions, how can you tell if the hub and or bearing is bad?

I've worked with many 9" rears, but this is my first banjo. Thanks in advance for your help.
 
Sorry, not much help on your axle problem, but i LOVE your avatar!
 
Last edited:
bonesy said:
I'm tracking down a noise in a forty rear end. I'm getting a clunking and almost a grinding noise from the passanger side.

I'll pull the hub and check it out. But upon jacking up the car, I noticed the axle can move in and out laterally about a 1/16". Is that OK?

While I'm asking questions, how can you tell if the hub and or bearing is bad?

I've worked with many 9" rears, but this is my first banjo. Thanks in advance for your help.
Click to expand...

I'd say you're on the right track with wheel bearing. You're gonna need a proper hub puller. Not cheap, but it's a must have. Get it pulled and the hub & bearing will tell the story. Don't just chuck the old housing if it's bad, there is a method to repair it: Turn down the bad surface and press fit a new bearing surface to it.

The 1/16" lateral play is normal and acceptable. With both wheels up, you might nail down the noise by hand turning one wheel and listen/feel.
 
ford38v8 said:
I'd say you're on the right track with wheel bearing. You're gonna need a proper hub puller. Not cheap, but it's a must have. Get it pulled and the hub & bearing will tell the story. Don't just chuck the old housing if it's bad, there is a method to repair it: Turn down the bad surface and press fit a new bearing surface to it.

The 1/16" lateral play is normal and acceptable. With both wheels up, you might nail down the noise by hand turning one wheel and listen/feel.
Click to expand...


The emergency brake was making noise inside the drum. Quick easy fix.

Thanks for the feedback on the lateral play. It sure helps put my mind at rest.

Thank you,

Scott
 
In and out axle end play can indicate wear in the differential. Wear to the spiders, diff housing, axle gears and spider gear cross shaft can add up to substantial end play. However your 1/16"is not bad. You're still o.k.!
 
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