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Discussion in 'The Garage' started by hapynzap, Jun 13, 2003.
My son has a 83 K5 with 6.2 and auto trans (700r4?)
Can you push or pull it to get it to start?
You can't push (or pull) start anything with an automatic transmission. Unless you somehow have a manual converter lockup you can do without the engine running...but I digress! Even if you had a manual transmission, the 6.2 is about 20:1 compression, so it would be hard to do. That's why the diesel has such a massive starter motor.
Like the others said, nope...
I dont know the diesal spec's but confedneck pull started a F250 on 42's thats had a 6.9 pretty easy but it also has a 4Speed.
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You can't push (or pull) start anything with an automatic transmission. Unless you somehow have a manual converter lockup you can do without the engine running...but I digress!
[/ QUOTE ]
Not quite true /forums/images/graemlins/smile.gif
The reason you can't pull or push start modern automatics is that the oil pump is driven off the engine crank, not the driveshaft. You can't engage the clutches without oil pressure, and you don't produce any pressure without the pump turning.
Apparently (so my dad says) some old automatic transmissions had rear mounted pumps, so the driveshaft was what actually turned them, and those could be push or pull started.
Yeah, the project K5 from 4Wheel&Offroad has a 700 that has a Accusump with an electric valve that can keep the clutches inside the tranny applied with the flick of a switch which I think would allow you to push start it...
you dad was right, my friend had a 63 belveder(i think thats how you spell it), with an auto and we push started it once in a while. you had to go pretty fast though,almost 35 to 40 mph. /forums/images/graemlins/k5.gifto /forums/images/graemlins/truck.gif
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