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E-Bodies.org Cuda Challenger Forum

Technical Shop => Engine, Transmission & Rear End => Topic started by: Djdimart64 on July 12, 2020, 05:05:52 AM

Title: 489 8 3/4 rear clunking on turns
Post by: Djdimart64 on July 12, 2020, 05:05:52 AM
Hey, I am polling the experts for advice here. For those who haven't seen any of my previous posts, my 73 Cuda has not been driven since 1995. I am currently in the process of getting it back on the road. Had a tow truck come to pull it out of the garage and over to a body shop and heard a loud clunking noise that I am assuming is the diff.

I figured it might have been something stuck after sitting for 25 years and it might break loose in time but the noise persists. I would really like to address it before a actually start driving the car. There was no issue with the diff when I parked it 25 years ago.

Since the lube is 25+ years old, I intend to drop the center section, clean everything and reinstall with new lube. Do you suggest I look for anything specific or something particular I should do that might help while it is apart?

I am finally very close to getting this car back on the road.

I appreciate any input.

Thanks
Title: Re: 489 8 3/4 rear clunking on turns
Post by: torredcuda on July 12, 2020, 05:11:33 AM
Check u-joints or maybe stuck brake pad?
Title: Re: 489 8 3/4 rear clunking on turns
Post by: ply64post on July 12, 2020, 06:00:36 AM
If you have a sure grip,I would remove old lube ,replace with new lube and proper sure grip additive. I would say the clutches got dry over the years in storage from not being used.


                                                                       Jeff
Title: Re: 489 8 3/4 rear clunking on turns
Post by: RUNCHARGER on July 12, 2020, 07:38:52 AM
Agreed: Hopefully lube will help. I would also add grease to the rear wheelbearings. It's a bit tricky but if you have a CV joint attachment for a grease gun it will help.
Title: Re: 489 8 3/4 rear clunking on turns
Post by: jimynick on July 12, 2020, 08:01:41 PM
Yeah, I agree that it's likely the SG clutches/cone. There's been a lot of discussion as to what the proper additive is to use, with GM and Ford additives both being recommended at various times. To start off with, I think I'd stick with the Mopar additive for now at least.  :cheers:
Title: Re: 489 8 3/4 rear clunking on turns
Post by: Djdimart64 on July 13, 2020, 05:08:10 PM
I know its not u-joints because the driveshaft was not connected. Appreciate all the feedback, I'll get that fluid changed out this weekend.
Title: Re: 489 8 3/4 rear clunking on turns
Post by: GoodysGotaCuda on July 13, 2020, 07:56:19 PM
Quote from: ply64post on July 12, 2020, 06:00:36 AM
If you have a sure grip,I would remove old lube ,replace with new lube and proper sure grip additive. I would say the clutches got dry over the years in storage from not being used.


                                                                       Jeff

I agree, as long as he does in-fact have a SureGrip. That dry suregrip sound is awful, been there before.
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