[Fot] Subject: Quaife and 4.1 Installation Issues TR3

[Catpusher at aol.com]

Hi Barry,

Where did you find the 4.1 R & P?

The pinion head bearing (factory PN# 100897) was Timken cup 3120, but the
inner race was 3188-S.  The "S" denotes a modification from normal.   The OD
of the pinion shaft was a size that required a slightly oversize ID in  the
brg.  This is the most important brg. in a TR diff. setup.

TR Regards,

Hardy


In a message dated 7/11/2011 3:58:57 P.M. Pacific Daylight Time,
barry at penybryn.ca writes:


Hi Hardy b Thanks  for your input. Based on the content of all the
suggestions and advice that I  have received so far, two consistent facts have
surfaced. First there is no  way that Quaife would have manufactured a case
that
only fit one ratio and the  second was to check the pinion depth. At the
time I ordered the pinion  bearings I could not source the original Timken
ones
and had to settle for  aftermarket bexactb replicas (probably Chinese as
there are no markings other  than a number). While the numbers and dimensions
appear to be the same as the  stock ones, the large bearing is definitely
different in construction and sits  higher in the cup. The correct
replacement bearings arrived today so webll  see.
Thanks  again.
Barry.



From:  Catpusher at aol.com [mailto:Catpusher at aol.com]
Sent: July-10-11 8:37  PM
To: fot at autox.team.net
Cc:  barry at penybryn.ca
Subject: Subject: [Fot] Quaife and 4.1  Installation Issues TR3


The  only problem that I had with 2 Quaifes that I did for other people was
 that the factory Hand Press collets could not get behind the side brgs. to
 remove them.

Is  the pinion Depth correct?

Who  made the 4.1 R & P ?

Quaife  problem as mentioned by others?



Hardy




In a  message dated 7/8/2011 8:02:47 P.M. Pacific Daylight Time,
fot-request at autox.team.net writes:

From:  "Barry Munson" <barry at penybryn.ca>
To:  <fot at autox.team.net>
Subject: [Fot] Quaife and 4.1 Installation  Issues TR3

Amici - I have purchased a new Quaife  directly from Quaife UK, a new 4.11
gear set and a complete set of new  bearings for installation in a Southwick
conversion TR3 differential  housing. In what should have been a relatively
simple installation  process has proved to be one royal PITA. Simply put
with
the pinion  installed with the correct preload, even with all the shims
moved
to one  side of the carrier there is no way to get any backlash.

This has  been driving my installer crazy as they have checked, several
times, all  the dimensions, bearing and cage heights. It appears that the
Quaife cage  is 1.2 mm taller than the stock cage. I have phoned the Quaife
tech line  twice and sent a number of e-mails requesting assistance and
received the  following response: "I think that our diff only fits with the
3.75 ratio  directly, the only option will be to Machine the crown  wheel
face."

<snip>

Barry.