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<div><span style="font-family: arial, helvetica; font-size: small; font-style: italic;">"... substitution of the 4th gear with a 5th gear"</span><br>
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<div><span style="font-family: arial, helvetica; font-size: small;">Are you speaking of swapping only the Toploader 4th gear to something equal to an overdrive ratio (meaning 5th Gear - like)..., or are you stating to swap the whole Toploader 4 speed for something like a T-5, 5 speed?</span></div>
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The was an overdrive version of the Toploader that had an overdrive 4th gear. But as this link states it was not a performance transmission. http://davidkeetoploaders.com/imposters.htm I believe is was used only in the 77-78 Ford Granada. Frankly I frequented wrecking yards back when they were prevalent (they are virtually non-existent today) and I never recall seeing anything but automatics. There was also the SROD overdrive 4 speed transmission. It has an equally bad reputation and a shifter location issue. Gear spacing was at least one of the problems with these transmissions. So, unless there is some special gear out there from the Toploader vendors the advantage is mileage only and not any reliability or performance driving enhancement.<br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font size="2">-----Original Message-----<br>
From: Allan Ballard <aballard@ix.netcom.com><br>
To: clydemclaughlin@verizon.net<br>
Cc: Tiger List List <tigers@autox.team.net><br>
Sent: Fri, Dec 17, 2021 12:18 pm<br>
Subject: Re: [Tigers] fuel milage<br>
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<div>I want to thank those who responded as you’ve provided much food for thought.
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<div>With my engine I’d consider mid-20s MPG to be a victory.</div>
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<div>One option that hasn’t been chronicled for those with stock 4 speed top loaders is substitution of the 4th gear with a 5th gear.</div>
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<div>For the open road of course.</div>
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<div>~Allan Ballard</div>
<div>~~Mk1a Tiger</div>
<div>~~Series I Alpine </div>
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<div dir="ltr" id="yiv3593934553AppleMailSignature">Sent from my iPhone</div>
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<div dir="ltr"><br clear="none">On Dec 11, 2021, at 2:56 PM, clyde mclaughlin via Tigers <<a rel="nofollow noopener noreferrer" shape="rect" ymailto="mailto:tigers@autox.team.net" target="_blank" href="mailto:tigers@autox.team.net">tigers@autox.team.net</a>> wrote:<br clear="none"><br clear="none"></div>
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<div style="color:black;font:10pt arial;">I need to preface this posting with the idea that everyone will have comments on their personal experiences and ideas about fuel milage. I don't want to start a two week dialog on the subject, but would like to through out a few of my opinions on the subject. First and foremost fuel mileage and rear tire wear has a direct correlation to your right foot! Secondly gearing would be the next most bang for the buck, i.e. stock 2:88's and a 5speed OD transmission, followed with good engine tuning. Tire size that was previously mentioned would be very negligible given the restrictions of tire/rim combinations for our Tigers. I recall in the 50's when the hot dodders were jacking up the rear with spring shackles and other methods, us sports car people laughed and figure they have done it for fuel mileage because now it is going down hill all the time, Ha Ha! I can comment that my car had 3:54 gears with the 4 speed and a k code engine, mileage about as poor as it gets, I currently have 3:07 gears with a 5speed and with 70-75 highway speed I get 23-25mpg. Carb fuel mixture is about 3.5% CO with less than 200HC at idle and runs very well, it will lean out to about 2.5%CO and 150HC at a no load 2000rpm. Forgot to mention I have 13 inch tires, 205/60 rear 185/60 front.<span></span></div>
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