[Healeys] Differential vs BN2 OVERDRIVE

Bob Spidell bspidell at comcast.net
Wed Mar 4 19:50:47 MST 2020


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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