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Right then guys. I'm trying to help my neighbour out with a poorly classic, he's not long bought. As stated above, it's an auto box Morris 1300. His problem, is lack of drive in reverse, that's worse when it's warm. This car has ( prior to him buying it), had very little use over the last 20 years, so we're wondering whether it's a case of too little use has gummed the box up ; or if there's a more serious issue. The car will reverse on the flat, but show it any incline & it loses drive. Revving it sometimes causes a lurch in reverse, but doesn't restore drive. Put it into forward drive, & things are fine. Could it be as little as adjustment, or sticking (bands  ). I'm a bit of a duffer when it comes to auto box issues, but want to try & help him, as he's already lost a bit of confidence with his new toy. |
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I've no experience with autos (apart from driving them occasionally) but my overdive* box responded well to new (correct grade) fluid filled to the correct level. It had a slow engagement when the fluid was low. The change was very clunky with "proper" gearbox oil. It changes very smoothly since I filled it with 20/50 engine oil (as listed in the handbook) *mentioned as I think overdrive friction bands work very similar to autobox internals, but I could be wrong! Maybe your mates just needs some miles on it to loosen up the sticky bits inside? Or wait for a reply from someone familiar with autos.  |
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IIRC like the manuals the auto boxes use the engine oil so a good flush and oil change, also the selector mechanism can be 'vague' with age.
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Needs a bigger hammer mate.......
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If it drives ok in top gear, it sound like there's an issue with the reverse band and/or servo. If there's no top gear, then it could be a top and reverse clutch issue.
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820
South East
Posts: 790
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I rebuilt a few of these many years ago, couple of things spring to mind but I will see if I can find my old manuals for a memory refresh.
As above cheapest and easiest thing to try first is an oil change but it sounds like seals, valves and adjustment.
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Thanks for the replies guys. I know he's already given it an oil change, & he said there was a slight improvement. This motor has only done about 20k genuine miles, so we're hoping it's not an excess wear issue. If anyone can share a bit of adjustment info, it'd be appreciated, as I've not been able to come up with anything so far.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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I think he needs to pull it and have a look.
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). I'm a bit of a duffer when it comes to auto box issues, but want to try & help him, as he's already lost a bit of confidence with his new toy. 
