MG MGB GT V8 Factory Originals Technical - LT77 gear extension
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| Is it possible to replace the gear extension mounting rubbers on an LT77 gearbox fitted to a factory V8 without removing the gearbox? There doesn't seem to be a lot of room through the top tunnel opening. Has anyone done this? Ian Thomson |
| ian thomson27/01/2012 at 18:27 |
| Yes done it, take the cover plate off the tunnel. You will be able to get at them if you undo the g/box cross member and lower it a bit on a trolley jack. |
| Allan Reeling28/01/2012 at 10:38 |
| Likewise - but from underneath - using poly bushes now. |
| R Walker29/01/2012 at 16:10 |
| Thanks for the replies. I take it poly bushes are the way to go. Are the ones Clive Wheatley has Poly or as original. Ian Thomson |
| ian thomson29/01/2012 at 16:28 |
| Ian - Clive is a shrewd operator and always looking for genuine improvements - ask him what he has. Otherwise Rimmers of Lincoln - have both. Yes, it is the way to go. Roger |
| R Walker03/02/2012 at 18:42 |
| May I join in, although I don´t own or drive a V8? In fact, my car is a 1964 MGB with a 2-lire-engine and a Rover SD1-box (LT77) instead of the original 4-speeder. I built this conversion myself in 1983 and it usually works very well. But now I need to replace my LT77. It´s very noisy when accelerating in 1st, 2nd and 3rd gears. Does anybody have more infos about this gearbox? I am looking for a sort of manual and info about the numbers on the box – they give a clue as to what ratios are inside, so I was told. I also need a parts supplier: all the rubber mounts on the gearshift extension have deteriorated and need replacement. Rimmer doesnt seem to have LT77-parts anymore. The pic shows the LT77 in situ before the drivetrain is installed Thanks, Jörn 
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| Joern-M18/02/2012 at 16:50 |
| Here's a little piece from RPI http://www.v8engines.com/transmission-3.htm#sd1 And another bit from Paddock http://www.paddockspares.com/blog/lt77-gearbox-frequently-asked-questions/ Here's an article with links to pdf files on the LT77 http://www.vintagemodelairplane.com/pages/Downloads/Rover_Tasters/Gearbox01.html I have a R380 box from TM Transmissions. He has a FAQ page for the LT77. http://www.freewebs.com/tmtransmissions/faqs.htm TM can do you an exchange LT77 from £375. He must get spares from somewhere - email him and ask. Several years ago I rebuilt a LT77 using a kit from here http://www.transmission-rebuild-kits.co.uk/-c-164_121.html It wasn't very successful, and although the gearbox worked OK it made a horrible noise. I eventually traded it in with TM Transmissions for the reconditioned R380. Hope this is of some help. Mike |
| Mike Howlett18/02/2012 at 20:35 |
| Somewhere on the internet is a complete service manual for the LT77. I printed it out and used it. Not sure how to locate it now, but if I find out I'll post here. |
| Mike Howlett18/02/2012 at 20:37 |
| Here's a photographic record http://forums.lr4x4.com/index.php?showtopic=52887 |
| Mike Howlett18/02/2012 at 20:42 |
| Mike, thanks for your help and for the links! Jörn |
| Joern-M19/02/2012 at 10:14 |
MG MGB GT V8 Factory Originals Technical index
