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Chris Tropea
Chris Tropea Associate Editor
2/28/25 11:39 a.m.
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As we rolled away in our 20-year-old Mustang, the seller mentioned that it might need a new rear wheel bearing. Sure enough, on the drive home, we could hear it howling away.

Add that to the list.

After a few days of very moderate driving, we saw that the rear brake pads were totally finished. L…

Read the rest of the story

Floating Doc (Forum Supporter)
Floating Doc (Forum Supporter) MegaDork
2/28/25 12:26 p.m.

I understand that you're trying to baseline the car first, but I would expect you're going to be back in there to do clutches on the limited slip. 

It's a frequent topic of discussion on the CSM page. Apparently, they wear out quickly.

David S. Wallens
David S. Wallens Editorial Director
2/28/25 12:32 p.m.

Oh, yes, and our LSD needs fresh clutches. 

At this point, we just wanted to get the car back on the road. The rear brakes were bad–to the point where it was just about time to park it. 

Chris Tropea
Chris Tropea Associate Editor
2/28/25 12:34 p.m.

I have been driving the car for about a week now and have to say, its not a bad place to spend time. I am really enjoying the simplicity of it, also the noises coming from the tailpipes are really good. 

Ranger50
Ranger50 MegaDork
2/28/25 12:38 p.m.

9" ends, 35 spline, spool. 😁 although I know a few folks that will make you a 9" ready for a 10" ring gear... 

If doing a bearing, I splurge for a new axle too. It's easy to condemn the bearing for noise, but after replacing the bearing there is still a noise...

David S. Wallens
David S. Wallens Editorial Director
2/28/25 1:12 p.m.

In reply to Ranger50 :

Club Spec Mustang rules require the stock 8.8, although we can install the upgraded carbon clutches from Ford. 

Some of the specs parts have arrived with more on the way. 

APEowner
APEowner UltraDork
2/28/25 1:35 p.m.
Chris Tropea said:

I have been driving the car for about a week now and have to say, its not a bad place to spend time. I am really enjoying the simplicity of it, also the noises coming from the tailpipes are really good. 

Simple with nice V8  sounds.  I miss having a vehicle in my fleet that matches this description.  I could buy one but it would just sit most of the time and that seems wrong.

Tom1200
Tom1200 PowerDork
2/28/25 3:48 p.m.

In reply to David S. Wallens :

I used the carbon LSD clutches in my Foxbody. They work a treat.

David S. Wallens
David S. Wallens Editorial Director
2/28/25 4:14 p.m.

In reply to Tom1200 :

Yeah, good to hear. Plus they’re specifically allowed in the class, too.

SeniorPBA2B
SeniorPBA2B New Reader
2/28/25 6:32 p.m.

In reply to David S. Wallens :

Rear diff fluid was free? Re-used the old fluid?

Tom Suddard
Tom Suddard Publisher
2/28/25 8:11 p.m.

It was great to see Chris and Paris take lead on a fairly big job for new mechanics--albeit a fairly straightforward one since these cars are so darn simple. Aside from hammering in the new bearings, I hardly touched the car, and they handled everything. I think this project is in good hands when the modifications begin in a few weeks. Can't wait to hear what they think about the process of building a race car. 

Tom Suddard
Tom Suddard Publisher
2/28/25 8:13 p.m.
SeniorPBA2B said:

In reply to David S. Wallens :

Rear diff fluid was free? Re-used the old fluid?

We could have re-used the fluid (we'll be back in this diff in a few months) but I have a seemingly neverending stockpile of 75-140 gear oil taking up space on the shelf. We added a few quarts of that. 

Ranger50
Ranger50 MegaDork
2/28/25 9:48 p.m.

In reply to David S. Wallens :

Sorry, I do not trust c-clips in any 8.8 solid axle. Seen too many axles decide to split  from the housing. No thanks.

Pete. (l33t FS)
Pete. (l33t FS) MegaDork
2/28/25 11:12 p.m.

In reply to Ranger50 :

That's the nice thing about discs.  The caliper can retain the axle.

Of course, the downside is that as the clutches wear, axle endplay increases, which leads to piston knockback.  I measured .250" of endplay on one rearend in a Ranger with severely worn clutches.  'Course, it had drum brakes, which didn't care about no steenking endplay.

 

No, I don't know how the C clips didn't fall out, either!

David S. Wallens
David S. Wallens Editorial Director
3/1/25 11:00 a.m.
Ranger50 said:

In reply to David S. Wallens :

Sorry, I do not trust c-clips in any 8.8 solid axle. Seen too many axles decide to split  from the housing. No thanks.

The Club Spec Mustang rules currently don’t permit that change.

Pete. (l33t FS)
Pete. (l33t FS) MegaDork
3/1/25 11:03 a.m.

In reply to David S. Wallens :

Do the rules allow putting a drain port in the rearend cover?   It sounds like rebuilding the diff clutches is a regular practice, if so then this makes life a lot less messy.

 

 

David S. Wallens
David S. Wallens Editorial Director
3/1/25 11:28 a.m.

In reply to Pete. (l33t FS) :

I don’t believe we can add one. 

David S. Wallens
David S. Wallens Editorial Director
3/1/25 11:31 a.m.

And, here, the Club Spec rules:

David S. Wallens
David S. Wallens Editorial Director
3/1/25 11:31 a.m.

 

David S. Wallens
David S. Wallens Editorial Director
3/1/25 11:33 a.m.

David S. Wallens
David S. Wallens Editorial Director
3/1/25 11:33 a.m.

David S. Wallens
David S. Wallens Editorial Director
3/1/25 11:33 a.m.

David S. Wallens
David S. Wallens Editorial Director
3/1/25 11:33 a.m.

David S. Wallens
David S. Wallens Editorial Director
3/1/25 11:36 a.m.

Big thing was also getting/keeping the car mobile while we wait for all of the parts necessary for the transformation. This is a 20-year-old Mustang with an unknown backstory. We didn’t want it to sit too long....

Pete. (l33t FS)
Pete. (l33t FS) MegaDork
3/1/25 11:37 a.m.

With that wording, even a bonded metal-rubber (reuseable) cover gasket would seem to be not allowed since it's not "essentially identical".

 

Sadly, they put the all important "comfort and convenience" specifically in bodywork and interior.

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