[DMCForum] Re: Input shaft coupler (was John Lane's PRV)

[tmpintnl@xxxxxxxxx]

Marc - No, it only twisted off the relatively soft coupler and 
sheared the roll pin.  The input shaft was fine, but the transmission 
main shaft was ruined by the fragments of the roll pin gouging the 
splines in the shaft.  The OEM coupler is thought to act as a sort 
of "structural fuse" that will shear out to prevent an overload 
condition in the main shaft, or elsewhere in the transmission 
gearing.  Unfortunately, this "fuse" has failed a few times now, but 
has in fact ruined the main shaft that it was designed to protect.  
My goal with the new coupler was to give the strength of the internal 
transmission parts the "benefit of the doubt".  I believe that the 
transmission is good for higher loads than the coupler can allow 
for.  Darryl Tinnerstet's car is a good example.  He sheared out the 
coupler almost immediately.  He changed the coupler, and the car has 
never had an issue with that area since.  BTW - I still owe you an 
answer regarding the input shaft ... You were asking about a stronger 
input shaft that also had an extended nose so that it would be able 
to engage the pilot bearing in the crankshaft.  I believe that a "one 
off" shaft would cost around $350 or so.  The per-piece price comes 
down when there is some quantity involved.

Toby Peterson
DeLorean Parts Northwest, LLC
www.delorean-parts.com

--- In DMCForum@xxxxxxxxxxxxxxx, Marc Levy <malevy_nj@xxxx> wrote:
> Twisted a input shaft with only 200HP?!  Was something
> else already broken?
> 
> --- tmpintnl@xxxx wrote:
> 
> ><SNIP>
> > analysis.  This was the car that twisted off its
> > input coupler, and 
> > caused me to make that stronger version.  It makes
> > just over 200HP I 
> > believe.  The other car was a partial conversion,
> <SNIP>

---

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