I also think there is one tooth difference in the ring gear. You will need
a TR4 starter pinion,
kengano@advant.com
downstate illinois
1959 TR3A TS57756L
1958 Model 10 Sedan TBE9239LDLB
> -----Original Message-----
> From: owner-triumphs@autox.team.net
> [mailto:owner-triumphs@autox.team.net]On Behalf Of Gregory Petrolati
> Sent: Thursday, July 16, 1998 5:17 PM
> To: Jack I. Brooks
> Cc: Triumphs@autox.team.net
> Subject: Re: TR4A Flywheel - description needed
>
>
>
> On Thu, 16 Jul 1998, Jack I. Brooks wrote:
>
> >
> > Listers,
> >
> > I am planning on upgrading my TR3 drivetrain this winter. One aspect of
> > this upgrade is the switch to the later diaphragm clutch, like the TR4A
> > though TR6. The only used part I need to acquire is a TR4A
> flywheel. I've
> > got a local club member who has a fair number of TR flywheels
> he is willing
> > to sell, but he doesn't know the difference between models.
> Unfortunately,
> > I have no experience here either, so the bottom line is.....
> >
> > How can I positively identify a TR4A flywheel?
>
> I'll give it a shot... If you have a TR3 pressure plate floating
> about use it to see if it will line up with the studs on the
> flywheel (I'm gonna go out on a limb here and say that stud
> position is the key identifier... I think). If it lines up, it's
> not the right flywheel... Conversley If you tale the TR4A pressure
> plate to your favorite machine shop you can have the studs moved.
>
> Identifying a good fly wheel, as i said thy're boat anchors. If
> it has no obvious flaws there probably arent any. Dangle it from a
> hook or your finger (my don't you have strong fingers) tap it with
> a wrench or something. If it rings nicely it should be okay. Blue
> areas probably are just surface hardening when you get it lightened
> and "refaced" these areas will most likely be milled off.
> >
> > Also, how thick is an uncut TR4A flywheel and what is the
> minimum allowable
> > thickness?
>
> It's about 1.5" thick give or take...
> >
> > Is there anything in particular I should look for beyond cracks,
> > blue'd/hardened areas, etc. I feel his price of $20 sounds fair.
> >
> Yeah I do too... Have a real good look at the ring gear while
> you're about it (ya may as well get the best of everything)
>
> You should remember, this is tractor technology... not the
> precision stuff that's made by computer today.
>
>
>
> gpetrola@prairienet.org 1962 TR4 (CT4852L)
> "That's not a leak... My car is just marking its territory!"
> Greg Petrolati, Champaign, Illinois
>
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