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austin healey transmission problems


Post by ghawkins on Jun 20th, 2010 at 02:17 pm
My 1961 austin healey 3000 has a transmission problem. It is the 4 speed with the overdrive. The problem is that if I drive it for a few blocks the tranny seems to dis engage. I have no more forward or reverse gears. I let it sit for a while and the gears come back. Any one ever have this problem before. thank you

Post by healeyhundred on Jun 20th, 2010 at 05:40 pm
Welcome to the forum.

I can't say I've ever experienced the problem you describe, but I assume it must be related to the overdrive.

The gearbox is purely mechanical so can't engage and disengage on its own. The overdrive relies on oil pressure to engage/disengage, so I'm guessing that is the likely culprit.

Looking in my service manual I can't see the condition you describe as a possible fault for the overdrive, but that is where I would start. First check should be the oil level in the gearbox/overdrive, butit would more likely be worn internals causing the issue, which would require a strip and rebuild.

James

Post by bipbip on Sep 12th, 2011 at 01:18 pm
I have the same problem, and I'm fighting with the gearbox and we don't find the solution. We have cheked all the clutch, on fact all is new, we have rebuilt the gearbox... and nothing, the problem continues... I think that must be a problem with the plunger of the reverse selector.
In my case the proble appears specially when the gearbox is hot. At the beginning it works well but as you explain at one moment when I change the gear is not possible, I have to stop to fit some gear.
Did you find the problem?
Thank you.

Post by healeyneil on Sep 12th, 2011 at 04:20 pm
Like James, I would say it is an overdrive problem. I seem to recall "losing" reverse a long time ago. Cant remember the cure right now, but I will search my memory




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