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MGB Geared too low

Last post 05-20-2009, 12:15 AM by PHIL WILKINS. 9 replies.
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  •  05-12-2009, 1:30 PM 19404

    MGB Geared too low

    Does anyone have a fix for the MGB's low gear range other than using a overdrive unit?  It's near exhausting to drive a distance when the motor is sceaming at 4000 rpm on the highway.  Is there gears that can be rebuilt in the rear end unit or a universal replacement unit?  I've searched the net and am unable to come up with any solutions.  I am driving a 73 MGB with 68 running gear with the wire wheels.  Motor runs great but just too many rpm's to cruise comfortalbly.  "Thanks"
  •  05-13-2009, 9:42 AM 19427 in reply to 19404

    Re: MGB Geared too low

    Well, there's the 5 speed conversion which, though pricy, gives the same ratio (in 5th gear) as overdrive 4th of the stock design, or so I understand.

    Failing that, I think I've read of custom builds that use alternative axles adapted to fit the MG, but that is a lot of work, and each is unique, rather than there being the well travelled path of a known good conversion.

    I know what you mean though, having driven my car from LA to San Francisco in a day. This was before it was given some major attention, so the engine, in addition to the 3500 rpm throbbing there was hideous rattling from the worn valve gear and a suspicious knock that tuned out to be bad rod bearing(s)... I can still hear it...

     Cheers,

    Ed


    I want my MGB
  •  05-13-2009, 10:26 AM 19429 in reply to 19427

    Re: MGB Geared too low

    Oh we are sooooo spoiled by modern machinery! The engine isn't hurting itself, though it is a bit wasteful to spin that fast when it isn't needed. I call this the "Lexus Effect", and I deal with it all the time. folks (NOT saying YOU) want it to look like a sports car, handle like a sports car, and have all the "cool" of the sports cars of yesteryear, but since they've been lulled to sleep by modern cars that don't jar you awake or disturb your conversation with their engine noise, they want silent, climate controlled, comfy riding reminders of what these cars used to be.

    I really don't mean to be harsh about this, but it's a fact. I've lost several restoration jobs because I've encouraged folks to go get a ride in the car they remember from their youth before spending many thousands trying to duplicate what it turns out is only a fantasy version of their youthful adventures. They've come back from that ride insisting there must be something wrong with the car, 'cause theirs was never like that! Or they've suggested that we change the character of the machine to make it more "tolerable". Well, to a point, I'll comply, though I'm actually happy to loose these jobs, since there is likely to be less than the desired client satisfaction.

    We can generally make things a little cooler in the cockpit, and sometimes just a little quieter, but I'm not in this business to so utterly change the character of the cars that they might as well be Miatas.

    I have NO PROBLEM modifying sports cars, but I want those mods to be for performance or reliability, not to turn a TR6 into a '79 Cordoba!! A five speed gearbox is a prime example of how to improve one of these machines without changing its character. There is the one from Moss, which is pricey but includes everything you need, and there is the Rivergate Restorations one, which is much less money, but which lets you supply your own gearbox and requires a bit more work and fitting.

    I used to drive a ratty MGA 1600 when I was much younger. It was cramped and hot as Hades in the summer, actually barbequing my right calf and foot. The heat in the winter was not impressive, to say the least. It was a loud car, and nobody ever bragged about the cushy ride in an A. But I absolutely loved every minute of the journey and wouldn't change a thing. When I get in an MGA now and pull that starter I begin to grin, and I can't wait to get up to speed and hear that motor thrashing away. It ain't no Lexus, man. And I wouldn't trade places for THREE Lexuses (Or is that Lexi?)

    Sorry to have gone on a bit of a rambling rant there. It comes with the territory and, sigh, age...


    Motorbill
    From Lola to Land Rover, If it's British and has wheels, it's likely I've bloodied me knuckles thereupon
  •  05-14-2009, 3:39 AM 19435 in reply to 19404

    Re: MGB Geared too low

    timbonmary,

    It does sound like you're a candidate for a 5 speed tranny.

    But motorbill; A hard day at the office? Tell us how you really feel.

    We all get what you're saying, but I'll bet you actually had a Fostgate stereo system and computerized climate control in that Lola, didn't you...fess-up!

    BTW, how did you hang the fuzzy dice with no rear view mirror?


    On their death bed, nobody ever said, "Gee I wish I'd spent more time at work!"

    '68 Sprite 1275
    '76 Midget 1500
  •  05-14-2009, 12:25 PM 19443 in reply to 19435

    Re: MGB Geared too low

    davey,

    When I was driving that Lola computerized climate control was just a gleam in its father's eye. The stereo was provided, however briefly, by the cars I was passing. (ahem) Who says I didn't have a rear view mirror? I had two. But I didn't hang the fuzzy dice on them. I ATE a couple pair just before green flag time to make me meaner..GRRRRRRRR.........

    Yes indeed, it was a hard day at the office. Wanna here about it? Didn't think so...

     


    Motorbill
    From Lola to Land Rover, If it's British and has wheels, it's likely I've bloodied me knuckles thereupon
  •  05-14-2009, 1:11 PM 19446 in reply to 19443

    Re: MGB Geared too low

    Hey-

    As I recall, the engine on my 67 MGB-GT was geared to scream at 60 mph to drown out the wind-noise on the straights and the passenger's screaming on the curves.

     

    LCJUTILA 

  •  05-14-2009, 3:22 PM 19448 in reply to 19443

    Re: MGB Geared too low

    motorbill,

    Your stoic crusty-ism is endearing to be sure!

    What do you use to wash them dice down, Guinness I believe, or was it DOT 4 break fluid?


    On their death bed, nobody ever said, "Gee I wish I'd spent more time at work!"

    '68 Sprite 1275
    '76 Midget 1500
  •  05-19-2009, 4:58 PM 19514 in reply to 19404

    Re: MGB Geared too low

    timbonmary:
    Does anyone have a fix for the MGB's low gear range other than using a overdrive unit?  It's near exhausting to drive a distance when the motor is sceaming at 4000 rpm on the highway.  Is there gears that can be rebuilt in the rear end unit or a universal replacement unit?  I've searched the net and am unable to come up with any solutions.  I am driving a 73 MGB with 68 running gear with the wire wheels.  Motor runs great but just too many rpm's to cruise comfortalbly.  "Thanks"

    My friend, all I have to say is you need to try driving at a relatively sedate 60 mph, top down in a TD.  That equates to 4200rpm and wind noise that is unbelievable and yet we have taken it on, not 1 but 2, 5000 mile trips through the western US.  If you don't like the sound of 4000rpm in a MGB (quiet compared to the TD), drop down to the 65mph or do what we do in the TD on long trips, wear ear plugs, they really reduce the noise fatigue. 

    If I sound a bit unsympathetic, it is probably because  we have two cars for transportation - a 53 TD and a 66 MGB.  The MGB is described as the only car we have with creature comforts in it, it has a OEM heater and a AM/FM radio with tape player in it (I don't know if the radio still works because we never turn it on).  We drive both cars interchangably (the TD is my wife's car of choise if she has to drive somewere).  We have been driving these cars since 1974 and as our "real" cars (Ford wagon, Dodge Omni, Audi) have worn out over the years, we just never replaced them, figuring that we have two really good cars that we enjoy driving over anything else that we have ever owned.

     I am with Motor Bill when he says "When I get in an MGA now and pull that starter I begin to grin, and I can't wait to get up to speed and hear that motor thrashing away. It ain't no Lexus, man. And I wouldn't trade places for THREE Lexuses (Or is that Lexi?)"

    He is right, who needs a radio or tape player or MP3, when one is blessed with the beautiful music coming from under the bonnet.

     

     

     


    Cheers,
    Dave
    http://homepages.donobi.net/sufuelpumps/
  •  05-19-2009, 10:54 PM 19519 in reply to 19514

    Re: MGB Geared too low

    "My friend, all I have to say is you need to try driving at a relatively sedate 60 mph, top down in a TD.  That equates to 4200rpm and wind noise that is unbelievable ..."

    Dave - you forgot to also mention the physical pummeling of your upper body and head by the wind gusts and backdrafts flowing around that most unaerodynamic of windscreens.  Plus the heartbreak of frantically grabbing just a bit too late for your departing favorite motoring hat that just got blown off because the top of the windscreen is just above eye level, exposing your thinning hair and whatever's covering it to the passing slipstream.

    And when you finally do arrive at your destination ( after the short course reversal to retrieve your hat), you really are grinning from ear to ear!  Yes

  •  05-20-2009, 12:15 AM 19521 in reply to 19404

    Re: MGB Geared too low

    Sounds like you are a classic case for my input 'classic car dilema'

    One has to ask the question,why has your 73 mgb been fitted with 68 running gear and wire wheels?.

    If you stuck with the makers proper original design of 4-speed + overdrive,there would be no problem.

    Think you should probably be driving a ford focus instead.You can buy a 2l turbo diesel which is only just ticking over at 60 mph.

    In any case,the road noise/wind noise/engine noise an mgb makes,is all part of the package.

    Phil


    phil wilkins