[Healeys] Transmission OD - 22% vs 28%

Simon Lachlan simon.lachlan at homecall.co.uk
Thu Feb 21 11:18:59 MST 2008


My BT7 has 28% and 3:54. Seems to pull fine at all rpm. (I've a "Fast road
Cam" and 3 HD6s).
I suspect that one can get pretty much all the response that one needs at
pretty well any rpm, but may choose to go into overdrive a fraction later.
For longer, faster, straighter runs the 28/3:54 combo is ideal in my
opinion.
Simon.
-----Original Message-----
From: healeys-bounces+simon.lachlan=homecall.co.uk at autox.team.net
[mailto:healeys-bounces+simon.lachlan=homecall.co.uk at autox.team.net] On
Behalf Of John Snyder
Sent: 21 February 2008 18:03
To: John H; healeys at autox.team.net
Subject: Re: [Healeys] Transmission OD - 22% vs 28%

I have a BT7 w/ a 22% O'd and a 3.54 rear end.  It also has a mild cam grind

(no lope).  It won't pull if the engine is below 2000 RPM, but it is great 
at 80 MPH.

John Snyder
>
> I am swapping tranmissions in my BN7.  One coming out is a 22% side shift.

> The one going in is a 28% side shift and just rebuilt. Bundled with my 
> 3.54 Lempert gear set should give me great cruising capabilities on 
> demand.
>
> Question:  the 22% has an enclosed area with a removable cover where the 
> solenoid shaft engages and disengages the OD (to keep debris and moisture 
> out, I assume)  The 28% does not have this enclosure leaving it exposed to

> debris and moisture.
>
> The parts manual shows only a metal deflector (called a stone gaurd) in 
> front of the solenoid.  Is this correct? and is there a way to convert to 
> the enclosed version, which seems safer in the long run?
>
> Thanks in advance,
>
> John Homonek
> Atlanta Chapter AHCA
> 1959 BN7
> 1960 AN5
> 1974 Jensen Healey
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