Differential Clutches

[crouse]

I'm going to replace the clutches in my differential.

I believe this is what I need?

https://www.americanmuscle.com/ford-88-traclok-kit.html

[BLACKMARAUDER04]

Make sure to check your axels and seals if your still 28 spline
I just blew the right seal. Upgraded to 31 spline Eaton Detroit Tru Trac


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[fastblackmerc]

I'm going to replace the clutches in my differential.

I believe this is what I need?

https://www.americanmuscle.com/ford-88-traclok-kit.html

That will work.

Use full synthetic 70w/140 gear oil and you won't need to add friction modifier.

[crouse]

I still have 28 spline axles. The owners manual shows 80W90 for the gear lube. Some of the tips of the teeth on my spider gears are chipped, but that doesn't seem to be causing any issues. Not sure if anyone offers 28 spline spider gears.

[blazen71]

No matter what, I always add a Bottle of Ford Friction Modifier to any limited slip regardless of make or brand

[mustangeddie]

Those clutches are correct but the spring is for a 31 spline unit it will not work.The Marauder trac-loc had unique spider gears that are unavailable you will have to change the entire trac loc to something from other Fords or aftermarket.If you are interested I have a complete Marauder trac-loc from my 56k mile 04 with good spider gears.I upgraded to 31 spline so I no longer need it.

[crouse]

How much are you asking for it? I'm guessing it's going to weight about 15-20 lbs?

[mustangeddie]

How much are you asking for it? I'm guessing it's going to weight about 15-20 lbs?$185 shipped I just shipped a Mustang one iirc it was 22lbs boxed up

[crouse]

Thanks. My pinion bearing is failing, so I am bringing my Marauder in next week. If they find more issues than just the pinion bearing, I might take you up on the unit.

[mustangeddie]

Probably the chips missing off the spider gears caused the bearing failure not good having metal floating around in the oil.

[crouse]

Sinks to the bottom. :)

[mustangeddie]

Sinks to the bottom. :)Maybe after you park it lol when you are moving I'm sure the ring gear is churning it all back up.

[Fastbob]

I agree with always adding a bottle of friction modifier no matter what gear lube you use.

[MyBlackBeasts]

Sinks to the bottom. :)

After parked a while, yes. When you start driving it mixes in with the gear oil just like making a smoothie in a blender. The ring gear acts like the blender blades and agitates the metal up from the bottom. Pull pan after driving and the oil will glitter like heavy metal flake paint.

[MyBlackBeasts]

The owners manual shows 80W90 for the gear lube.

Ford later revised it to the 75w140.

[mustangeddie]

I agree about the friction modifier also... 75/140 & 1 bottle of friction modifier otherwise it will chatter.

[justbob]

Mobil 1 with no modifier WILL chatter.


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[MyBlackBeasts]

Mobil 1 with no modifier WILL chatter.


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I had same experience with Mobil 1 even though its supposed to not need FM.

I changed to Royal Purple = quiet as a church mouse with no added FM.

[justbob]

I had same experience with Mobil 1 even though its supposed to not need FM.

I changed to Royal Purple = quiet as a church mouse with no added FM.

We put the Mobil1 in Joe’s and didn’t make it one block without horrible chatter. Next stop was Advance for modifier!


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[mustangeddie]

Mobil 1 with no modifier WILL chatter.
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Red Line with no modifier same experience 2 cars even though it claims you don't need

[dmjarosz]

I used 75W140 Mobil 1 after soaking the new clutches in friction modifier for 3 days and it still chattered like a mofo. Good thing I have the Ford racing diff cover, was easy to add the modifier afterwards without making a mess.

[fastblackmerc]

No noise with over 90K miles with 75W140 Mobile 1 and no friction modifier.

[BLACKMARAUDER04]

The Eaton tru track says no friction modifier needed. We definitely used modifier. Just the sweet hum of the Eaton working properly.


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[crouse]

I dropped my Marauder off at a local shop and said I was fairly sure the pinion bearing was bad and to have them replace the differential clutches while they had the rear end apart. They called me and said the growling noise from the rear end was a bad left front wheel bearing. The noise changes under acceleration and deceleration. I would think if it was a bad left front wheel bearing, the noise would get worse when turning right which is doesn't. Anyone else seen something like this?

[Curless]

I dropped my Marauder off at a local shop and said I was fairly sure the pinion bearing was bad and to have them replace the differential clutches while they had the rear end apart. They called me and said the growling noise from the rear end was a bad left front wheel bearing. The noise changes under acceleration and deceleration. I would think if it was a bad left front wheel bearing, the noise would get worse when turning right which is doesn't. Anyone else seen something like this?
Usually we can get the noise to change on a front wheel bearing if we swerve from right to left... usually... not always though. Hey, If the shop was honest enough to tell you this instead of just charging you for a rear diff I'd say they can be trusted!

[fastblackmerc]

Usually we can get the noise to change on a front wheel bearing if we swerve from right to left... usually... not always though. Hey, If the shop was honest enough to tell you this instead of just charging you for a rear diff I'd say they can be trusted!

If the repair actually fixes the problem.

[crouse]

The shop just called and want me to come and take a look at the rear end. I'm guessing they now don't think the growling sound is the left front wheel hub. I'm heading there during my lunch hour today. If it needs a total rebuild and is really expensive, does anyone have any less expensive options? Maybe an entire rear end that I can install myself. If I buy a new carrier, I'll still need the gears set which I can't do. Anyone have a used carrier and axles for sale? I have new carbon fiber clutches.

[crouse]

Spider gears are shot. The S spring is shot. Ring and pinion are ok. Axles are border line. For a quick inexpensive fix, does anyone sell 28 spline spider gears and S spring. It's up on the hoist and the shop and I need to get these parts quick. If not, I believe it means a new 31 spline carrier and 31 spline axles? What else would I need? Any help would be appreciated.

[crouse]

I found this, but $200 is a lot of money.

https://lmr.com/item/LRS-4215A/86-04-Mustang-88-Rear-Differential-Spider-Gears-28-Spline-Traction-Lok-Will

[mustangeddie]

I found this, but $200 is a lot of money.

https://lmr.com/item/LRS-4215A/86-04-Mustang-88-Rear-Differential-Spider-Gears-28-Spline-Traction-Lok-Will
Those are incorrect the Marauder had it's own spider gears that have been long out of production.Still have the 56k mile unit out of my 04 can mail it ASAP.

[crouse]

How much are you asking for it? What state are you in? I'm in Minnesota. 55068

[mustangeddie]

How much are you asking for it? What state are you in?
I'm in NY $185 shipped ups ground will take 3 business days... will send next day if you want but you'll have to cover shipping but probably be expensive

[crouse]

I sent you a PM with my mobile number.

[mustangeddie]

I sent you a PM with my mobile number.Sent you a text with photos

[crouse]

A friend of mine has a 28 spline Richmond carrier. I'm headed there on Saturday to help remove it from the rear end housing. Hoping my ring gear will fit the Richmond.