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3.55:1 rear end
- Thread starter Morris
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Trevor Jessie
Yoda
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3827
bill_young
Jedi Warrior
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I like this handy calculator for finding different combinations of gear ratios and rpms. Just plug in your data and it will tell you what to expect. https://www.f-body.org/gears/
As far as available ratios for the Spridget rear axle, this place in England has perhaps the widest selection, although I don't remember a 3.55. https://www.autogear.co.uk/product/?groupid=5&model=&manufacturer=5
As far as available ratios for the Spridget rear axle, this place in England has perhaps the widest selection, although I don't remember a 3.55. https://www.autogear.co.uk/product/?groupid=5&model=&manufacturer=5
jcatnite
Jedi Knight
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Morris,
Good luck with the autogear bunch. I couldn't get them to answer any emails regarding the crown and pinion on a 3.55. If you have any luck, sell me your 3.7 crown wheel and pinion. I'm running a 4.22 but just purchased a spare with a 3.9 in it on eBay. I haven't been on in a while. I'm glad to see you didn't ditch your Midget way back a few months ago.
JC
Good luck with the autogear bunch. I couldn't get them to answer any emails regarding the crown and pinion on a 3.55. If you have any luck, sell me your 3.7 crown wheel and pinion. I'm running a 4.22 but just purchased a spare with a 3.9 in it on eBay. I haven't been on in a while. I'm glad to see you didn't ditch your Midget way back a few months ago.
JC
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What car did a 3.55 come in or was this an aftermarket item? I thought that the latest model midgets had the 3.7 and that that was the lowest.
OP
Morris
Yoda
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Found a decent gear ratio calculator.
https://www.corral.net/tech/gearcalc.html
It seems like a 3.55 rear end would only drop my highway revs about 200 rpm. Back to the drawing board!
Bill, neither of the links you sent would open for me. Thanks, though.
https://www.corral.net/tech/gearcalc.html
It seems like a 3.55 rear end would only drop my highway revs about 200 rpm. Back to the drawing board!
Bill, neither of the links you sent would open for me. Thanks, though.
bill_young
Jedi Warrior
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I can't get anything to come up with the link to autogear, must have changed their address. Like the rear axle for the MGB and MGA, the Spridget axle was shared in other forms and ratios with other BMC cars so there are some ratios available for that axle that were not production MG ratios. The 3.55:1 is probably one of those.
Trevor Jessie
Yoda
Offline
<div class="ubbcode-block"><div class="ubbcode-header">Quote:]It seems like a 3.55 rear end would only drop my highway revs about 200 rpm[/QUOTE]
... you didn't believe me?
... you didn't believe me?
Hap Waldrop
Yoda
Offline
It may come at a cost, that it cruises good down the interstate, but it's a dog in the lower gears around town and on the curvey roads.
