4R100 coast clutch fix?

[early99powerstroke]

Does anyone know how to fix the problem that the 4R100 coast clutch drum has with the retaining snap ring popping out? Thanks

 

[Mark Kovalsky]

Most of the problem is that the groove in the drum wasn't cut deep enough. I have seen aftermarket drums with deeper grooves, and also improved snap rings.

 

[littleredstroker]

How do you know when the ring pops out?

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[Mark Kovalsky]

No engine braking when the shift lever is in 1 or 2.

If you are going to try this make sure you're going at least 40 MPH.

 

[littleredstroker]

In my trans if the convertor is locked its fine. If its unlocked in drive when I let off , rpms drop to 700 or whatever idle is, like its in neutral. If I downshift from 40 to second gear it goes to an idle bit if i rev it up a little it will seem like its going back into gear and slow me down. It's done since I got my injectors and tunes a few months ago. Does any of that make sense

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[Mark Kovalsky]

I think you have an issue with the coast clutch.

 

[littleredstroker]

Don't really know what that means.. can u dumb it down for me

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[onebad7.3]

Don't really know what that means.. can u dumb it down for me

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Your coast clutch isn't working like it should

 

[Mark Kovalsky]

And when the coast clutch isn't working as it should you won't have engine braking when you should.

Contrary to popular opinion the torque converter doesn't have to be locked to provide engine braking. There will be about 10% more engine braking if it is locked, but you will still have plenty without it being locked.

 

[littleredstroker]

Ok so you gotta pull the trans apart to get to it?

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[onebad7.3]

Ok so you gotta pull the trans apart to get to it?

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yes

 

[littleredstroker]

Dang, so can you give me an idea of where exactly it is? Do I just het a new one or ...

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[littleredstroker]

And is it safe to.drive for the time being or do I need to park.it

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[Denver]

Drive it and when it goes that will be the time to rebuild it.

 

[littleredstroker]

Lol thanks. Are we talking days weeks months ?

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[Mark Kovalsky]

I've never seen a trans fail from this. It just won't have engine braking.

 

[littleredstroker]

Ok well that's relieving . I know tunes change stuff.with the trans but didn't know if this was it or not as I noticed it right after I installed

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[early99powerstroke]

I can have my local machine shop cut a deeper groove in the drum but does anyone know the part number or specs and brand for the updated thicker snap ring for the coast clutch?