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Jan 11, 2007 20:21:13 GMT
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Hey up, quick one here. A random one at that... Can you tow an LT77 gearbox? (not that I need to, it's a technical question). I've even discussed this with my lecturers, to no avail! I turn to you, the knowledgable RR crowd to find out! So far my view has been 'no' due to a layshaft driven oil pump that APPARENTLY feeds pressurised oil to bearings in the gearbox (wether it's splash, or lubing plain bearings I can't tell). This layshaft won't rotate unless the engine is (or in gear with clutch depressed?) turning so when towing, no oil is supplied = box dies. Does anyone have an SD1 or Landrover book to hand that would explain what the oil pump does and why you can't tow it? I just want a nice neat written explanation and it cleared up  Thanks to anyone who can help! Apparently the SD1 manual says "no you shouldn't tow, if must, short distance and no faster than 30mph".      |
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Last Edit: Jan 11, 2007 20:24:28 GMT by Lewis
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Jan 11, 2007 21:09:52 GMT
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Auto box right? Yes you can but you must have the engine running (and *I think* it must be in drive). The fluid pump is driven by the engine running so without that it will run dry.
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Jan 11, 2007 21:15:01 GMT
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The LT77 is a five speed manual, replaced by the R380 which is also a five speed manual.
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Jan 11, 2007 21:16:28 GMT
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lt77 is a manual box with an internal oil pump. not sure on this as most manuals run a splash and dip lube system. does the pump oil the shafts and bearings like an engine? disconect the prop if your worried, or put the rear wheels on a spec lift  |
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Jan 11, 2007 21:30:36 GMT
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Nah it's not an "I've got to do it question", we were just trying to settle it.
General consensus from Landie and SD1 people seems not to tow it great distances at anything over 30mph.....I'd love to know wether it lubricates plain bearings or is just splash, as you say!
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Odin
Posted a lot
Posts: 1,406
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Jan 11, 2007 21:32:13 GMT
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The pump is driven from the tail of the layshaft and oils various bearings by means of passages in the mainshaft. It's to assist the splash lubrication, and not really replace it.
All the Sherpa Haynes manual says is that LT77 equipped models should have the propshaft removed for towing, as the oil pump will not operate without the engine running.
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Jan 11, 2007 21:34:57 GMT
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Thanks for the additional That makes sense - I would have been very suprised if it was a pressurised oil system! |
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Jan 11, 2007 22:01:20 GMT
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In which case discard my blethering |
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Jan 11, 2007 22:27:52 GMT
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I have a LT77 in my minor and I didn't know that so cheers. Although it hasn't let me down yet ; )
James
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Hello! Yea that's partly where the conversation originated from You'll find out I guess ;D Best of luck tho, I hope it hasn't suffered any major damage. |
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Will find out when I fathom the electrics out, ruddy cut off switch. Who's gonna nick a TR7 drophead a hairdresser late for a mobile appointment? ;D
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Jan 12, 2007 10:34:30 GMT
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I got told the same by an AA man once. No help I know but there you go ;D
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Jan 12, 2007 10:47:05 GMT
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I think its OK for shortish distances, I wouldn't dolly an SD1 from lands end to John O groats though.
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1972 Fiat 130 1985 Talbot Alpine 1974 Lancia Beta Saloon 1975 + 1986 Mazda 929 Koop + Wagon 1982 Fiat Argenta 2.0 iniezione elettronica 1977 Toyota Carina TA14 BEST CAR EVER!!!!!!!! 1979 Datsun B310 Sunny 4-dr 1984 Audi 200 Quattro Turbo 1983 Honda Accord 1.6 DX GONE1989 Alfa 75 2.0 TS Mr T says: TREAT YO MOTHER RIGHT! |
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Jan 12, 2007 12:04:41 GMT
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Another vote for the "don't tow!" margin.....repeating what I said with a bit more anxt methinks! ;D
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