[DeTomaso] Need an Oilite non-magnetic pilot busing
Douglas Kelm
dakelm at qwest.net
Fri Jun 22 01:02:15 EDT 2007
With most conventional manual transmissions (which the ZF is definitely NOT) there is a zero clearance (circular) fit between the trans and the bellhousing. Then to index the bellhousing to the block you use a magnetic base dial indicator affixed to the flywheel (or crankshaft) and turn the crank with the tip of the dial indicator tracing the hole in the bellhousing, all the while observing variances in concentricity and shifting the bellhousing around (using the offset dowel pins if necessary) until the hole in the bellhousing is concentric with the crankshaft. Obviously a trial and error, time consuming process! I'm not sure how the ZF is indexed to it's bellhousing, since I have never separated the two. But if it is like most other transmissions, the above procedure should work. I guess I should have done this check when I had my ZF out for a clutch replacement. but I didn't. Oh well! I would be interested in hearing from other Pantera owners who have performed this check and what, if any, were the extent of the variances in concentricity they found.
Doug
----- Original Message -----
From: Ken Green
To: Douglas Kelm ; larry at ohiotimecorp.com ; 'Garth Rodericks' ; 'Mike Thomas' ; detomaso at realbig.com
Sent: Thursday, June 21, 2007 10:31 PM
Subject: Re: [DeTomaso] Need an Oilite non-magnetic pilot busing
Doug,
But how do you tell if there is a miss alignment? The weight of the ZF seems to make it impossible to do it by feel. And it appears to be a real potential problem because I think Tilton and others sell offset dowels to correct for errors. I guess once a block is line bored, there can be errors? Is there a template to lay against the block and then against the bell housing with the transmission bolted up to check for alignment?
Ken
Douglas Kelm <dakelm at qwest.net> wrote:
Larry,
Yes, a misaligned input shaft and flywheel would raise havoc with the pilot
bushing, but short of using offset alignment dowels, there is not much you
can do about it. I don't want to think that DeTomaso wouldn't have gotten
this right, because it's highly unlikely that only a few cars would be
affected. The ZF bellhousing to Ford block alignment was not hand fit to
each car! It was a production line machining process (all the same).
Doug Kelm
----- Original Message -----
From: "Larry - Ohio Time Corp"
To: "'Douglas Kelm'" ; "'Ken Green'"
; "'Garth Rodericks'" ;
"'Mike Thomas'" ;
Sent: Thursday, June 21, 2007 8:36 AM
Subject: RE: [DeTomaso] Need an Oilite non-magnetic pilot busing
> Hi Doug,
>
> Any time I see a badly worn pilot bushing on what is most likely a low
miles
> car, I think misalignment of the input shaft. The input shaft and the
crank
> need to be on the same plane (if that is the right word). I did have a Doc
> around that had a very simple testing method...but as normal for me I
cannot
> find it.
>
> Larry - Cleveland
>
>
>
> -----Original Message-----
> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com]
On
> Behalf Of Douglas Kelm
> Sent: Wednesday, June 20, 2007 11:03 PM
> To: Ken Green; Garth Rodericks; Mike Thomas; detomaso at realbig.com
> Subject: Re: [DeTomaso] Need an Oilite non-magnetic pilot busing
>
> The oillite bushing that I removed from my Pantera was clearly stamped
with
> the Ford logo - the word Ford inside an oval outline. It was also severely
> worn with a great amount of "slop" between it and the ZF input shaft, a
> situation that is definitely detrimental to the input shaft transmission
> bearing. I have an inherent distrust of needle bearing in an application
> like this, but I have come to believe, after talking at length with Dennis
> Quella and looking at my well worn bushing, that a needle bearing is the
> only way to go.
>
> Doug Kelm
>
> ----- Original Message -----
> From: "Ken Green"
> To: "Garth Rodericks" ; "Mike Thomas"
> ;
> Sent: Wednesday, June 20, 2007 5:11 PM
> Subject: Re: [DeTomaso] Need an Oilite non-magnetic pilot busing
>
>
> > I don't understand why there would be a "Pantera" pilot bushing.
I
> suppose that different flywheel manufacturers might maintain different
> tollerances, and it might be better to get the bushing from who ever made
> the flywheel.
> >
> > Ken
> >
> > Garth Rodericks wrote:
> > <<< Which one of our vendors carries the non-magnetic Oilite bronze
> pilot bushings? >>>
> >
> > I don't know about the vendors, but fellow Pantera owner and machinist
> Marlin Jack (pantera1974 at verizon.net)
> > makes a high quality oilite bronze pilot bushing for the Pantera.
Contact
> him directly for price.
> >
> > Cheers!
> > Garth
> > #4033
> >
> >
> > ---------------------------------
> > Park yourself in front of a world of choices in alternative vehicles.
> > Visit the Yahoo! Auto Green Center.
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