[ihc] Torque Convertor and damaged pump?

[Seay Capt Matthew R <seaymr@xxxxxxxxxxxxxx>]

Joel,

        It was partially full from when I removed it.  I didnt drain it
completely. Nor did I put a load on it prior to running through the shift
pattern and letting it run in neutral for a while.  I am not sure what the
keying is you're talking about, but the converter is the only thing I took
off of the tranny prior to hooking it up to the new engine. 

I did have to use a helicoil thread repair kit on one of the bolt holes that
attaches the converter to the flexplate, but I dont think there is a
significant change in the mass at that one point to throw the ballance off
and give me that shimmy.  It has to be something more sublime.  Besides the
flex plate, what else within a 727 could throw it out of ballance? 

Matt






Date: Fri, 12 Dec 2003 14:18:40 -0700 
From: Joel M Brodsky <jmbrodsky@domain.elided> 
Subject: [ihc] Torque Convertor and damaged pump? 

Matt, 
      It is of extreme importance that the keying be matched when you 
install a torque convertor into a trans.  Especially the 727, if you damage 
the front pump drive, you can arrive at a non functioning trans when fully 
assembled.  The torque convertor should be at least half full when you put 
it on, but it should pump up fairly quickly when you start the engine and 
run through the gears in a no-load situation.  The IH service manual IIRC 
has a treatise on this topic.  Did your convertor have a drain?  DId you 
drain it before or is this a new empty convertor, or was it still full from 
when you removed it?  It'll be about 5-10 lbs heavier if it's still full. 
They usally have -some- fludi on them to keeps then internals lubricated, 
but not enough to run the truck on. 

If you started up the truck and drove somewhere on an only partially filled 
Torque Convertor, it may already be damaged. 

If you damaged the front pump on assembly then the convertor won't fill and 
you're driving it dry and it should shift funny if at all.  If it shifts, 
it's got *some* fluid.  How much?  Have to see the truck. 

JoelB