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Old 02-22-2013, 07:42 PM   #1
Cory51191
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Default Center of gravity 02 WRX transmission??

So I'm doing a clutch install on my 02 WRX (5-spd).
I've only made so much progress because I ran into a problem. Solved it.
...anyways I'm going to drop the transmission out tomorrow and don't have a transmission jack so ill be using a regular jack with wheels.

I know it won't be perfect and I understand the transmission weighs 135lbs give or take. but I'm strong so I can handle what the jack can't.
Just wondering if someone could point out the center of gravity so the jack can be placed in an efficient place.

Could someone do me a huge favor and edit this photo and point to the center of gravity (on the bottom, I can use my imagination).

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Old 02-22-2013, 08:12 PM   #2
wcjuggalo
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there is a little bump on the bottom of the trans, its about 1x1/2x1/2 in size. remove the pad from the jack and use the hole to line up with the bump. fwiw, i only use the jack to install the trans, i man-handle the trans out of the car with my mitts. like you said, it only weighs 135lbs(caution bodliy injury may occur).
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Old 02-22-2013, 08:16 PM   #3
Cory51191
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Fwiw?

Thank you. Hopefully I find that bump in the morning.
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Old 02-22-2013, 08:32 PM   #4
stephens
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For what it's worth. The bump is near the front of the trans. It's noticable to say the least. I have seen some people use 2x4s just to act as a larger plane but placing the jack hole on the "bump" seems to be the best idea.
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Old 02-22-2013, 09:37 PM   #5
Uncle Scotty
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dont forget about the ground wire that goes from the top of the trans to the pitchstop mount on the firewall
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Old 02-22-2013, 09:52 PM   #6
Cory51191
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Quote:
Originally Posted by Uncle Scotty View Post
dont forget about the ground wire that goes from the top of the trans to the pitchstop mount on the firewall
That wire isn't on my car. Before I bought it, the clutch was replaced (eBay I'm assuming) and the wire just wasn't mounted next to the engine mount. Stupid question, but is it important?
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Old 02-22-2013, 09:59 PM   #7
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Quote:
Originally Posted by Cory51191 View Post
That wire isn't on my car. Before I bought it, the clutch was replaced (eBay I'm assuming) and the wire just wasn't mounted next to the engine mount. Stupid question, but is it important?
THAT is one of the MOST important grounds on the car......really.

it it aint there.....put it back
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Old 02-22-2013, 10:42 PM   #8
Cory51191
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Quote:
Originally Posted by Uncle Scotty View Post

THAT is one of the MOST important grounds on the car......really.

it it aint there.....put it back
Edit: Never mind. Re-read your reply, Top of trans.

So I know it grounds next to the engine mount, but where does it go to?
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Old 02-22-2013, 10:47 PM   #9
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second top trans case bolt, from the front.....to the pitch stop mount on the firewall
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Old 02-23-2013, 02:58 AM   #10
paulpat
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FYI for a sti 6mt the center of gravity was the lower fluid plate thing.... U know what I'm talking about and it worked. I did what u did with the 5mt. It's a bear but thank god it's smaller than a six speed. Omg. If I was at my parents place I would of found your COG on the 5mt. Good luck with the clutch!
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Old 02-23-2013, 03:30 AM   #11
Uncle Scotty
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and its more the center of mass...not gravity...but anyway
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Old 02-23-2013, 01:37 PM   #12
paulpat
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Quote:
Originally Posted by Uncle Scotty View Post
and its more the center of mass...not gravity...but anyway
Ugh. .... Must be a non civil engineer. Those people...........only use those terms and units
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Old 02-24-2013, 12:42 PM   #13
rocketperson7
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I grounded mine to the same ground as the starter

much less resistance = better accuracy

yore wires might not stretch over there, I think I had to make mine myself
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Old 02-24-2013, 04:10 PM   #14
Cory51191
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Quote:
Originally Posted by rocketperson7 View Post
I grounded mine to the same ground as the starter

much less resistance = better accuracy

yore wires might not stretch over there, I think I had to make mine myself
Looks like I'm going to have to make one too considering whoever took the transmission out before never put the ground back. What does it ground? What do you lose when the ground isn't there? What gauge wire do I have to use?
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Old 02-24-2013, 06:43 PM   #15
rocketperson7
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speed sensor, reverse lights, and neutral position switch

just find a piece of wire laying around, and use it

if you have to buy something, I'd say around 16 gauge stranded would do fine and can be found at every hardware store known to man
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Old 02-24-2013, 10:43 PM   #16
Uncle Scotty
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Quote:
Originally Posted by rocketperson7 View Post
I grounded mine to the same ground as the starter

much less resistance = better accuracy

yore wires might not stretch over there, I think I had to make mine myself



you grounded WHAT to the starter ground???

and the resistance isnt the issue....the location IS the issue

grounding the trans to the BODY is intent

and im not sure you understand what is going on, here....and making all the difference of potential equal is the intent of grounding
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