I'm going to tell Russ on you. ?;-)
Sent from Yahoo Mail on Android
On Wed, Aug 9, 2017 at 5:19 PM, i erbs<eyera3000 at gmail.com> wrote: put a
nissan 5 speed in it.
Ira Erbs
1959 100-6
MKI engine and disc brakes
excuse typos and strange words my phone wants you to see.
Portland,OR
On Aug 9, 2017 5:10 PM, "Michael MacLean" <rrengineer.mike at att.net> wrote:
I got the idea from Russ that it would be more positive, not very extreme.?
Just not what you are used to with the sleeve.? Of course you can't take my
word for it.? I have no reference point as this BN2 is my first big Healey.?
Sure wish my Bugeye had overdrive. Wow! What mileage I could get out it then!
Mike MacLean
On Wednesday, August 9, 2017 12:30 PM, Bob Spidell <bspidell at
comcast.net> wrote:
Good info!? Just how much harsher is engagement with the larger accumulator??
As one who always tries to shift as smoothly as possible--without slipping the
clutch much, if any--is engagement so harsh as to require a slip of the clutch
which, of course, will contribute to clutch wear?? If clutch isn't used, is
engagement so harsh as to be a 'shock' to the drivetrain; i.e. U-joints,
splines, differential gears?
Bob
On 8/9/2017 5:58 AM, Ed O'Neal wrote:
Mike, ? The original OD design used a 1 ?? accumulator piston with a
concentric double spring.? This configuration was used in a lot of different
vehicles including the Triumphs.? Donald Healey didn?t like how the OD engaged
harshly when the clutch was not used during the shift.? He changed the design
to incorporate a sleeve fitted in the 1 ?? bore with a smaller 1 1/8?
accumulator piston inside of the sleeve and a single spring.? This gave a
slower engagement much like a modern automatic transmission.? However, as the
OD wears the internal leakage increases and the OD will engage very slowly or
not at all.? Using ?the larger accumulator is a good idea (in my opinion) and
will delay the point when internal leakage causes a problem. ? Ed ? ed at
wadsworthoneal.com ? Edward J. O?Neal, P.E., Pte. Wadsworth O?Neal Associates,
Inc. 6418 Commerce Park Drive Fort Myers, Florida? 33966 phone:? (239) 245-8728
cell:??????? (239) 410-6174 ? ? From: Healeys [mailto:healeys-bounces at
autox. team.net] On Behalf Of Michael MacLean
Sent: Tuesday, August 08, 2017 8:47 PM
To: Healey List
Subject: [Healeys] Russ Thompson ? ???? Through a reference from the list
I am having Russ Thompson in Northridge, California rebuild my BN2
transmission.? It is a low mileage (10,000 mi. approx) transmission, but I
wanted to be able to put it in and not have to take it back out again.? Good
thing I took this precaution.? Russ found the overdrive stuck and would never
have worked.? Today he showed me the accumulator piston.? The smaller center
piston was scored from dirt or crap in the oil.? Russ replaced it with a one
piece piston from a Triumph overdrive.? There was a huge spring below it.?
Anyone heard of this?? He said engagement will be real positive now.? Even with
the low mileage, the number 2 synchro was toast and will be replaced.? The
other two were fine and will be re-used.? All the gears showed very little sign
of wear.? The reverse gear had some surface rust on the teeth, but that can be
blasted and it will be fine.? Getting closer to having the drive train is the
car. ???? I know I am going to start a discussion, but Russ recommends using
40wt motor oil for the transmission.? Anyone know what weight Redline MTL is?
Mike MacLean
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