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Main > Automotive > Mechanics > Gearboxes
Installing heavy gearboxes: When putting in a large gearbox, balance it on a hydraulic jack with a piece of wood under it first. Tie thick rope around it twice and then as you raise the jack, tighten the rope around a crowbar sitting over the engine cavity, protected from the windscreen by several pieces of wood (remove the wiper blade on that side).

The gearbox will not fall off the jack so long as the ropes are tight as they keep it from overtilting as well as being able to fully suspend it on their own, while allowing free play for locating it on the dowels (two or more small tubes that stick out from the engine area which the gearbox sits on).

Point of Interest: For those of you who think the crowbar will be forced into the windscreen, there is no horizontal push exerted on it, only downward pull by the heavy box. This has the effect of stabilising the crowbar instead of making it a hazard to glass and other parts of the engine bay. If you have an Engine Crane, the job is even easier, and you do not need ropes, a jack or crowbar, all elements that require non-disturbance and a precision use to complete this delicate operation successfully.   myxlfidian (150)

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Main > Automotive > Mechanics > Gearboxes
The type of transmission oil you use is a major factor in gearbox performance and durability. Genuine oil often has additives in it that protect the solenoids which other brands don't, and can be as much as 30% cheaper.   [guest]

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Main > Automotive > Mechanics > Gearboxes
Always have overdrive off on the gearstick when driving under 70km/h. It saves your gearbox end-clutch from burning out.   [guest]

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Main > Automotive > Mechanics > Gearboxes
If your automatic gearbox remains in third gear with reverse that is called failsafe third. It's a purely electrical state the box goes into when it overheats or a wire shorts out. The box itself is not damaged, most likely. Remove a battery terminal and leave it for 20 minutes to reset the internal computer. If it does it again, its a crossed wire - check the pulse generators on top of the box. If it doesn't, it was overheating - you may have been going too fast for too long for the gearbox you have.   [guest]

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Main > Automotive > Mechanics > Gearboxes
It is much easier to install a gearbox with an engine crane than just with a jack.

I always keep a spare gearbox because it gearboxes can fail at any time and it is annoying when you don't have one to replace it with. Ensure you get a spare gearbox with exactly the same stamped number on it. If it deviates by even one character (i.e. its a K751AOW instead of a K751AOW5) it will not work, and you will have wasted half a day's work finding that out.   [guest]

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Main > Automotive > Mechanics > Gearboxes
Change your transmission oil and filter every year to keep the box using quality oil. The oil loses a lot of its quality after about a year.   myxlfidian (150)

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Main > Automotive > Mechanics > Gearboxes
When you change a gearbox, you have to remove and replace the left and right constant velocity joints (CV joints or driveshafts). You should get a wheel alignment after reassembly. You should also get a wheel alignment after removing lower control arms to replace bushes and balljoints, or replacing tie rod ends. Same goes with replacing front shock absorbers or struts.

Some companies offer front and rear wheel alignment. Unless you have just changed your rear shock absorbers, the rear part is just a way for them to get double the money for the job.   myxlfidian (150)

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Main > Automotive > Mechanics > Gearboxes
When you are going up a hill you normally take on a warm engine in drive (D), switch down to Low (L) or 2nd (2) gear when the engine is cold. Cold engine don't run in drive very well.   myxlfidian (150)

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