[Healeys] Differential vs BN2 OVERDRIVE

[Patrick & Caroline Quinn]

Hello Mike

 

Can you please let us know how the magnet is fitted to the gearbox drain plug for a sideshift box.

 

They can be purchased complete from Denis Welsh for £9.95 plus postage, but would be interested in doing my own.

 

Thanks

 

Patrick Quinn

Blue Mountains, Australia

 

From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Michael Salter
Sent: Thursday, 5 March 2020 7:51 PM
To: Bob Spidell
Cc: healeys at autox.team.net
Subject: Re: [Healeys] Differential vs BN2 OVERDRIVE

 

Quite correct Bob, 

However I believe the premature failure of the laygear needle bearings is caused by circulation of the microscopic chips of hardened steel that are shed by the 1st, reverse and laygear when people grind them together. 

To minimize this I always install a magnet on the gearbox drain plug to supplement the overdrive one. 

I have been restoring (replacing) the 1st gear section of MG "T" series gearboxes for several years for which we have been using a tougher steel alloy for the replacement 1st gear. To date have experienced no failures, even in boxes that have been raced extensively. 

I would presume that the people doing the Healey laygears are using similar  material.

 

M

 

On Thu, Mar 5, 2020 at 6:26 PM Bob Spidell <bspidell at comcast.net> wrote:

Don't forget the laygear shafts; they wear at the ends due to the side 
loads.  Hopefully, the 'uprated' DWM shaft I just installed holds up.

ps.  The only laygears I've seen advertised were 'rebuilt'--i.e. welded 
together--is there a source now for new laygears?

bs

On 3/4/2020 9:15 PM, Michael Salter wrote:
> One consideration regarding the use of 1st gear is the durability of 
> said gear. With a count of only 13 the straight cut teeth on the 
> laygear tend to wear very quickly when subjected to any sort of load.
> Although laygears and 1st gears are available rebuilding a gearbox is 
> not an inexpensive exercise so starting off gently in 2nd gear is 
> HIGHLY recommended.
>
> M
>

_______________________________________________
Support Team.Net http://www.team.net/donate.html
Suggested annual donation  $12.75

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive

Healeys at autox.team.net
http://autox.team.net/mailman/listinfo/healeys

Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20200306/9a851ce6/attachment.htm>