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So my s40 tranny has a bad input shaft bearing and im ready to swap it out. I have a 2 1/2 ton floor jack two jack stands and the jack that comes with the car. How do i support the motor/trans for transmission removal?

 
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Volvo S40? I've always used blocks of wood on my Civic, to support my engine and/or tranny.

 
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^^ Yep. Wood is great, and won't scratch whatever you're lifting. They do sell transmission jacks which are built solely for that purpose, or I bet you could probably rent one. My brother and I used one when we swapped out the tranny in his Evo 8 and it worked great.

 
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Thanks for the responses. I think im going to jack up my motor with my stock honda jack and some 2x4s and my trans with the floor jac +2x4. Should i jack up my motor by the flywheel or on the oil pan?

 
Rep Power: 212

Put the car on jackstands all the way around. Put the jack snug up against the oil pan and lock the jack tight. The motor is going to sag when you take the transmission out, so the jacks sole purpose is to keep the motor in place after you lower the transmission.

I'd recommend not doing this job alone, even if you have a wife or girlfriend who can just check to make sure the jackstands stay on all fours, and that the jack stays nice and snug while you're working (and to serve you beer and snacks, haha). You're gonna want someone around just in case the **** hits the fan.

Finally, I would not recommend using the scissor jack that Honda provides. That thing sucks majorly. My recommendation is to invest ~$100 on a nice, low profile 3 ton craftsman jack. It doesn't have to be aluminum (I got the steel one and weighs 100 lbs, but its not that bad). But it will reliably keep that motor up. Wood is soft and can slip or crack, but is fine for using above the jack, just not beneath it.