[DML] Input Shafts

["content22207" <brobertson@xxxxxxxxxxxx>]

Smaller splines also = weaker splines. They simply can not put up with
the punishment of aligning an input shaft like big 10 splines can. And
they're shaped differently (angled sides vs straight), reducing the
amount of material even further. I found my old AMC alignment tool and
compared it to the Valeo: 
Width of splines: 5/32" vs 1/16" (halfway down spline)
Depth of splines: 5/32" vs 1/16"

I fail to understand the inherent weakness of Renault input shafts.
Ford runs theirs on the 460 (425 lbs torque) no problem. Apparently a
Chevy 350 will snap the Renault. Or does it just strip the splines?

My pins are in place BTW. I think the damage is done before I ever
reach them. You'd be amazed at how little effort is needed to totally
ruin a 21 spline disc.

Bill Robertson
#5939
 
>--- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski <webmaster@xxxx> wrote:
> Bill, there are two locating roll pins at the top of the bellhousing. 
> I'm not sure if it's meant to be like this but the one we took off
today 
> left one in the bellhousing and one in the engine. The alignment does 
> NOT rely on the bolts. Dave Swingle posted some time ago about the 
> results if these are missing.
> 
> BTW I checked with Darren (PRV/Renault guy) and he said the original 10 
> spline was bespoke. They changed to a 21 spline (not 28) to conform
with 
> other manufacturers. And, in reply to a previous post - smaller splines 
> equals larger diameter solid part of the shaft =  stronger shaft
> 
> Martin
> 





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