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PV, 120 (Amazon), 1800 General Forum for the Volvo PV, 120 and 1800 cars |
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Gearbox oil leaksViews : 1196 Replies : 9Users Viewing This Thread : |
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Feb 23rd, 2021, 09:30 | #1 |
Senior Member
Last Online: Feb 25th, 2024 20:49
Join Date: Dec 2020
Location: Flitwick
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Gearbox oil leaks
Just a note on the above, I have been slowly re-commissioning my Amazon and some of that has involved attempting to cure oil leaks, engine and gearbox.
Whilst looking for the gearbox leak I discovered that the casing that houses the reverse light switch wasn't tight so I obviously tightened it and continued to decide which casket the oil was coming from (M41 with O/D), cleaned everything down, went for another road test and upon returning home clambered back underneath to try and find the source only to find virtually no leaks at all (tiniest amount from the prop output lip seal). I'm thinking that the majority of my leak was being caused by the loose machine screw holding the housing in place, is this possible? Is the thread in the main-case a through hole? If so just thought it was worth sharing with the forum users. Doug. |
Feb 23rd, 2021, 11:31 | #2 | |
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Last Online: Apr 28th, 2024 11:44
Join Date: May 2019
Location: Herts
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Quote:
I had my M41 gearbox rebuilt re fitted started leaking :-( after investigation found the front cone to be incorrect and return oil drain didn't line up , but that's been sorted and seems ok now. I also found missing bolts in the bell housing - most annoying from previous owner Always Something to do ! Cheers Paul |
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Feb 23rd, 2021, 11:59 | #3 |
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Last Online: Feb 25th, 2024 20:49
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No the cause of the leak that I shared with you on text, the gasket not being installed correctly, was an engine oil leak and at that point i didn't even know I had a gearbox leak I thought all the oil was from the engine!
Doug. |
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Apr 29th, 2021, 14:36 | #4 |
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Last Online: Oct 1st, 2023 14:39
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Location: leics
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I have an OD leak from the rev counter drive. The rest is bone dry.
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Apr 29th, 2021, 21:31 | #5 |
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Last Online: Yesterday 21:35
Join Date: Jul 2006
Location: Chatham
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Check and tighten ALL of the bolts after you have cleaned all of it down.
Speedo cable not rev counter. A common leak spot. New seals easy to fit. Don't forget to check the gearbox oil level. |
Apr 30th, 2021, 17:20 | #6 |
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Last Online: Yesterday 19:54
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Location: Saskatchewan, Canada
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I don't recall the retaining screws for the reverse light switch cover being through-the-case. However, the through the case hole that the shifter rail pops through is not exactly a precision fit and allows oil to weep through and eventually out around the cover edge. The gasket between the back of the transmission face and the OD adapter piece extends up into the area around the reverse light switch. The edge of switch cover presses on this gasket to form a nominal seal. If the gasket is old that seal is pretty ineffective. Even after I regasketed my M41 that area around the reverse light switch developed a nice layer of oil / dust pretty quickly.
For jimbo1593, the speedometer drive has two rubber seals on it. 380192 and 191117 for the M41. Replacing those seals should eliminate the oil leak. |
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