[Fot] A-Type Overdrive Testing

[van.mulders.marcel at telenet.be]

I think the unidirectional clutch (roller bearing) is there in the first place to keep the drive going while engaging the overdrive. Without this arrangement, the revs would go up every time the overdrive is engaged, while the cone clutch is moving (unless you keep your foot off the accelerator pedal when engaging the overdrive). PS : when the cone clutch has gone, the unidirectional clutch has to bear the whole driving force : it doesn't last long when this happens.
Marcel

----- Oorspronkelijk bericht -----
Van: "fot" <fot at autox.team.net>
Aan: "fot" <fot at autox.team.net>
Verzonden: Donderdag 26 december 2019 14:32:24
Onderwerp: Re: [Fot] A-Type Overdrive Testing

> I didn't spin but I did lock up one rear wheel with a Detroit 
> Locker diff.  Large bang, it didn't like that.  Detroit 
> Locker was OK, but the one way clutch / roller arrangement in 
> the OD broke into multiple pieces.  What's funny is that it 
> still worked perfectly.  

Just a thought: Has anyone tried just leaving out the rollers in the sprag
clutch?  Might need stiffer direct drive springs, and skip the burnouts, but
direct drive in 1st gear seems like the only time the sprag clutch is really
needed; once you've built hydraulic pressure.

-- Randall

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