Mgb overdrive removal Drain oil 2. This can be a bit Please consider joining the channel for more racing and DIY videos: / @davidrussellwilks Engine and Gearbox (Transmission) Removal from an MGB with Step by Step Instructions. com alternator, Basil Adams camshaft and side cover, Eurospec tail lights, 1976 dashboard and console, 1999 Chevy cavalier seats, GM heater motor and fan with Ford 3 speed controller, Ford Merkur/Sierra parcel shelf, cruise Disassembling an MGB overdrive. The v IMPORTANT! The LH overdrive is attached to the gearbox with the solenoid and the manufactures info plate on the bottom. Electrical - usually external of the overdrive, those that aren't can always be fixed without removing the overdrive. I also found the Oct 7, 2024 · It is bolted to a 1970 (probably original to the rusted-out 1970 body) overdrive transmission - all new clutch components including flywheel, new front/rear seals and I disassembled/cleaned the OD solenoid, replaced its O rings, replaced the little screen thing, made VERY sure I didn't lose the little steel balls and properly filled with new 20 Can I remove my defunct OD with transimision in car? It needs to be rebuilt (broke from stuck in reverse)I dont want to pull the whole thing out. It sometimes over runs when slowing down. Causes may be electrical or failures with the unit itself. Nov 11, 2016 · Has anyone removed the gearbox on a 67 MGB (overdrive) without taking the engine out? I have a hoist and all the stands and jacks. Simply connect your ohmmeter to the bullet connector leading to the solenoid, and the other ohmmeter probe to any part of the overdrive or gearbox body. Aug 20, 2021 · The rubber bumper cars are fitted with a Laycock overdrive situated at the rear of the gearbox. I think the snap ring that holds the floating drum to the overdrive slide has come off. The input is via the planet carrier and when the sun gear is locked to the ring gear the whole unit rotates as a single unit to give direct drive. You could also use any of the remaining MGB driveshafts, rebuild and lengthen accordingly. The picture shows the service plates. Selecting the proper one from the start will likely be the most cost-effective choice in the long run! An OD gearbox is one of the most endearing and sought after options supplied on our beloved MGBs. MG MGB Technical - Overdrive removal A friend has a a problem with his overdrive and is considering getting it refurbed - I have always taken the engine/ gearbox out in the past, but is it possible to pull off the O/D by removing the cross member/prop and angling the gearbox down ? May 31, 2025 · Overdrive Maintenance. Mar 5, 2017 · I have a 1974 MGB-GT. Correct assembly of the solenoid assembly puts the "top hat" in first with the side with the fat o-ring Hi Guys Can anyone help as I need to remove my Overdrive unit on my 67 Roadster (4speed 3Syncro) Can the Overdrive unit be removed without removing the engine & gearbox? Thanks Bob Apr 13, 2006 · If all goes well I will be picking up a 1973 MGB-GT with overdrive on Tuesday in PHL and driving it back to GA. Arrowed is the flat on the casing that allows the removal of the V8 propshaft bolts while the flange is still fitted to the output shaft. . ) If I had the transmission on a bench already, what is invo Jan 14, 2013 · I need to remove my overdrive gear knob so I can fit new carpet set any info or photos would be great The gear train consists of a sun-wheel (A), planet wheels (B), planet wheel carrier (D), and annulus with ring gear (C) inside which drives the output shaft. My thanks to the many forum contributors on this topic over the years who've provided the benefit of their experience and made my task that much easier. Mar 11, 2011 · Can anyone plz tell me how to remove the shift knob from a 79 mgb Have to replace it and the boot Undid what appears to be a lock nut under the knob But Can seem to Jan 1, 2015 · Hi, I am having to replace the overdrive inhibitor switch on my 1969 MBG GT, I have seen others do this by cutting a hole in the transmission tunnel. The big parts are easy - remove the speedometer drive, the remote housing, the output flange, remove the rear extension. Secondly, when I removed the gaiter to address this issue, I discovered a litany of past bodges and Dec 26, 2017 · Hi Peter, As the overdrive was working before taking the car “off the road”, all I’m doing is effectively servicing it in line with the University videos, hence no need to remove unit or crossmember. There is a cam collar mounted on the main shaft to drive the overdrive unit pump. Is there anyway to do this without pulling the engine? it seems that on at least the 70 the starter 'bubble' on the trany gets stuck. Jun 27, 2013 · In overdrive-overdrive freewheels on deceleration: In this condition, the MGB will accelerate but the free wheeling clutch can allow the engine to return to idle speed while the car is still running down the highway at 55 mph. Sep 15, 2021 · Under the car you’ll see a wire coming out the gearbox next to a 59mm square metal plate. Selecting the proper one from the start will likely be the most cost-effective choice in the long run! Oct 11, 2024 · The image above shows an original MGB gearbox casing (green arrow) has been altered to provide a round mounting flange for the Overdrive to fit against, whilst the gearbox mainshaft (Red arrow) is modified to engage inside the Overdrive and also provide a cam to operate the Overdrive oil pump. Well it went south last night. These come off with only a few bolts. MG repairs of all kinds in simple video's are very informative to the Dutch MGCar Club as well. The LH type overdrive was an option for 1968 onwards MGBs. Now remove the overdrive - if fitted. Part 2 of 3 showing how to repair your overdrive when it won't fully engage. Not surprisingly this strained the wiring to the overdrive switch which in my car is mounted in the gear knob, leading to an intermittent fault. I guess my question is after you engage the overdrive in third or forth gear and you slow Hi Guys Can anyone help as I need to remove my Overdrive unit on my 67 Roadster (4speed 3Syncro) Can the Overdrive unit be removed without removing the engine & gearbox? Thanks Bob View and Download MG MGB workshop manual online. Jul 3, 2016 · Does draining the oil from the gearbox also remove oil from the OD. On cars with the column switch - to avoid cutting wires - insert it at B where the gearbox harness joins the main harness below the pedal box. once done you can look ahead on the drivers side LHD mg and see the large lockout switch. It will work on the bench but when in the car, under load, it will engage and then disengage without losing pressure. Any tips or tricks you can offer on replacing the cable? Thanks! Charlie '70 MGB Apr 16, 2018 · I want to take apart my bought-on-ebay black-label overdrive transmission I took off most of the external nuts that seem to hold the overdrive to the main unit, and I took off the access plate and removed some weird piece of metal that looked like a pincer, and unscrewed the set nuts that keep t In David Knowles's 'MG V8' Geoff Allen writes that "Over the 1973 Easter Bank Holiday, and for several days and overtime evenings afterwards, a number of shop rectification fitters worked on the ten press cars and two other cars to remove the overdrive operation on third gear, due to problems with the gearbox in overdrive third. Stand box on end to allow oil to drain forward 3. Jun 27, 2023 · DISASSEMBLY Disassembly of the MGB 4-speed transmission is actually pretty simple and only requires a few tools. Jan 28, 2019 · The Haynes manual simply says to refit as removal which is absolutely useless. Long handle claw foot wrench. Mechanical - usually require removal and stripping of the overdrive unit. Remove tower (note it is located on two dowels) 6. My question is can the overdrive unit be removed from the transmission with th Overdrive - LH-Type LH type without ignition relay (68-76 and V8): On cars with the dash-mounted manual switch to protect the most wiring insert the fuse in the white wire at A where it connects to the back of the switch. Jan 31, 2019 · MGB_LH_Overdrive. Disconnect this wire from the bullet connector about 200mm from where it enters the gearbox and the w… Faulty overdrive?If the switch on the gearlever is faulty on your 1976 onwards (Rubber Bumper) MGB, follow our quick guide here on how to remove & change the See here for detail on the Interlocking Arm Assembly including removal and how it ensures only one gear can be selected at a time. Jun 18, 2005 · IM trying to replace the clutch disc preasure plate and TO bearing. Be careful when you remove it as there is a small ball bearing… In overdrive – overdrive freewheels on deceleration: In this condition, the MGB will accelerate and run at constant speed. Dec 9, 2012 · Hey guys, I just bought a 1970 B and knew the cable was bad - the speedo bounced all over the place. Let's ignore that part for now (ie: dropping transmission vs. If anyone has done this can you advise me of position of this cutout. Jul 28, 2020 · 1972 mgb gt blue label overdrive unity I believe my overdrive unit needs a good in place servicing/internal cleaning. MG MGB Technical - Overdrive removal A friend has a a problem with his overdrive and is considering getting it refurbed - I have always taken the engine/ gearbox out in the past, but is it possible to pull off the O/D by removing the cross member/prop and angling the gearbox down ? Overdrive Transmissions by Tom Sotomayor This article is not intended as a “how to” installation guide, but rather to assist in selecting the correct model overdrive transmission (or OD for short) for any given year MGB. Resistance will be anywhere from 15-25 ohms, although somewhat higher is no problem. Since pulling the engine is a time consuming, knuckle-bruising adventure that can be difficult on both yourself and the car, take the opportunity of checking this procedure out. Undo 6 bolts retaining gearlever extension tower 5. rotating makes it bind. Inside the rear extension is an assembly that keeps the linkage that engages the selector rods in place. I have watched JT video showing reinstall on a pulled transmision, but dont want to pull the engine and tranny. May 31, 2025 · This will help with MGB Overdrive Diagnostics if your overdrive is not working. This picture shows the yellow Jul 22, 2009 · OK, so I know it is damned near impossible to change with the transmission normally mounted in the car. information about the MGB and MGB GT classic cars including news and reviews, techs and specs – also updates on repairs, servicing and diy modifications I do on my own MGB Roadster. It allows the I have a 1974 MGB-GT. Apr 6, 2014 · You need to remove the boot,the shifter ,and the plate around the shifter the big palte not just the one with the bolts and spring washers. Wondering if it is physically possible? May 12, 2010 · Part 1 of 3 showing how to repair your overdrive when it won't fully engage. ) I asked Paul (mgbstuff) and Bing but so far found no help so I'm turning to MGE. Drain rest of oil 4. Unlike the D-type where they are basically on the side. It is easy to turn out once started. I have watched the John Twist video and while the information is good, the quality of the video I watched is poor( gray and grainy) to say the least. Jun 16, 2024 · I'm about to remove the engine and gearbox on my '73 UK chrome bumper overdrive MGB to change the clutch and attend to other things while it's all apart (mounts, seals, unis etc). MGB automobile pdf manual download. Some maintenance & repair can be done with gearbox in car. im hoping Im missing something easy so i can line up the new clutch Jan 4, 2016 · This article is not intended as a "how to" installation guide, but rather to assist in selecting the correct model overdrive transmission (or OD for short) for any given year MGB. The overdrive slips in and out weather the switch is engaged or not. Hydraulic - nearly always can be fixed with the overdrive in place as most items are easily accessed from under the car. Dirty hydraulic components or, more commonly, a worn sliding member (cone clutch) causes this. Gearbox Removal December 2019 Gearbox replacement! With the possible exception of a non-OD 4-synch box (and that only with partial dismantling in-situ) you can't remove an MGB gearbox leaving the engine in place, because of the fixed crossmember under the OD (3- or 4-synch) or gearbox tail (3-synch). As the gearbox is nearly ready to attach I feel I should do this whilst it's out of the car. MG MGB Technical - overdrive solenoid removal My overdrive takes a second or two to engage and someone on here said to clean the solenoid out. Do I need to remove the switch (#10/11 here) first and if so what's the best way? Then that exposes nut #66 which I unscrew then the knob unscrews from the shaft? Any other tips? (My stick is detached from the box. A freewheeling clutch can allow the engine to return to idle while the car is still running down the highway at 60 mph. I have never driven a overdrive MG and would like some information on how to use the overdrive. How much oil should be replaced--3 qts? User manual says to use motor oil and I was thinking I would go with 20w50 which is listed as acceptable in the manual. I know the modern oils have different additives now than 50 years A new driveshaft for the MGB 63-67 roadster (with overdrive) length 32” approx is available under part # 268-100. pdf A good article from the MGOC website explaining checks to do if you have problems with the overdrive unit. My question is can the overdrive unit be removed from the transmission with th Can the overdrive unit be removed from vehicle, to ease the removal of transmission while engine drive train still in vehicle I have worked out the following procedure on my daughter’s ’79 MGB, and it should work on most later model “B”s without overdrive. Actually found things to be remarkable good considering age of unit, some swarf on wire filter screen and slight wear to plunger valve wheel. But when the sun-wheel is held stationary the planet carrier rotation turns the planet Jul 28, 2022 · Removal of the late knob with the overdrive switch on top is confounding me. Hi Guys Can anyone help as I need to remove my Overdrive unit on my 67 Roadster (4speed 3Syncro) Can the Overdrive unit be removed without removing the engine & gearbox? Thanks Bob Can I remove my defunct OD with transimision in car? It needs to be rebuilt (broke from stuck in reverse)I dont want to pull the whole thing out. Best done with the gearbox standing on its bell-housing end on wood blocks to protect the end of the 1st-motion shaft - remove the eight 7/16" AF nuts and lock-washers. cutting an access panel vs removing engine and trans, etc. I would like to do it over the winter. The round plug covers the oil pressure relief valve and its filter, the square plate with the blue printing covers the solenoid and the large steel moulded plate is a small oil sump and contains a gauze filter and covers the oil pump. MGB 4 synchro overdrive gearbox servicing guide Initial tasks 1. It is a right swine to refit if you don’t know the trick. I like the idea of having easy access to this switch. I want to recycle my Hi Guys Can anyone help as I need to remove my Overdrive unit on my 67 Roadster (4speed 3Syncro) Can the Overdrive unit be removed without removing the engine & gearbox? Thanks Bob Hi Guys Can anyone help as I need to remove my Overdrive unit on my 67 Roadster (4speed 3Syncro) Can the Overdrive unit be removed without removing the engine & gearbox? Thanks Bob Hi Guys Can anyone help as I need to remove my Overdrive unit on my 67 Roadster (4speed 3Syncro) Can the Overdrive unit be removed without removing the engine & gearbox? Thanks Bob Hi Guys Can anyone help as I need to remove my Overdrive unit on my 67 Roadster (4speed 3Syncro) Can the Overdrive unit be removed without removing the engine & gearbox? Thanks Bob Hi Guys Can anyone help as I need to remove my Overdrive unit on my 67 Roadster (4speed 3Syncro) Can the Overdrive unit be removed without removing the engine & gearbox? Thanks Bob MG MGB Technical - Overdrive removal A friend has a a problem with his overdrive and is considering getting it refurbed - I have always taken the engine/ gearbox out in the past, but is it possible to pull off the O/D by removing the cross member/prop and angling the gearbox down ? Hi Guys Can anyone help as I need to remove my Overdrive unit on my 67 Roadster (4speed 3Syncro) Can the Overdrive unit be removed without removing the engine & gearbox? Thanks Bob Hi Guys Can anyone help as I need to remove my Overdrive unit on my 67 Roadster (4speed 3Syncro) Can the Overdrive unit be removed without removing the engine & gearbox? Thanks Bob Aug 17, 2019 · No need to remove the solenoid to test the resistance. Jun 10, 2008 · 1971 MGBGT, overdrive, Limey relay and fuse kits, Rick Ingram struts all round, Jeff Schlemmer points distributor, mgccars. Fortunately mine was working fine before i took it out with the engin… Hi Guys Can anyone help as I need to remove my Overdrive unit on my 67 Roadster (4speed 3Syncro) Can the Overdrive unit be removed without removing the engine & gearbox? Thanks Bob Apr 23, 2018 · When I got the car the gear lever looked lovely but there were problems! Firstly the gear knob was loose and tended to rotate around the gear stick. kdsu svgc lfxxawf csirv mabnua cwhact dat artwcmn facjd zubsjitr nojpug rztf wdx uwrc mdyyw