[Healeys] Differential vs BN2 OVERDRIVE

[WILLIAM B LAWRENCE]

I have a 1.28 overdrive with a set of Mike Lempert’s 3.54:1 final drive gears in my 100 and I  am very happy with the setup.

It is very tractable around town and relaxed cruising on the highway.

Bill Lawrence
BN1 #554
________________________________
From: Healeys <healeys-bounces at autox.team.net> on behalf of Bob Spidell <bspidell at comcast.net>
Sent: Thursday, March 5, 2020 2:50:47 AM
To: healeys at autox.team.net <healeys at autox.team.net>
Subject: Re: [Healeys] Differential vs BN2 OVERDRIVE

I respectfully disagree.  First is so low in a Healey I often started in second before I put a 3.54 diff in my BJ8.  I still start in second if I'm rolling at all, facing downhill or it just won't go into first (plenty of low-end torque in the old lump).  Second is more usable as well (first and second are too close together IMO; I barely get into second before it's time to upshift).  I wouldn't mind a .28 OD ratio with a 3.54 diff either.

Bob


On 3/4/2020 11:34 AM, Mark Goodman wrote:
If you change from a 3.90 to a 3.54 rear end you lose most of 1st gear.  I changed my overdrive on my BJ8 to a BN2
and in 4th gear overdrive my engine operates about 600 RPM lower.  It is a much better way to go.


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