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Old 09-21-2012, 08:23 PM   #1
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Hesitation, Bucking, Spitting, Popping after Tranny Rebuild

I just picked up my Jeep after getting the tranny rebuilt. A quarter mile down the street, from the shop, it started hesitating when I'd hit the gas.

I thought that since it was out of service and sitting in my driveway for several months, and with a battery needing jumping, that it just needed a drive to freshen her up.

I drove about 10 miles from the shop to my home. Along that way I saw the tach jump 500rpm continuously, heard pinging, kind of like timing pinging. It basically bucked, jerked and everything under the sun all the way home. It didn't overheat as I had imagined it would, just running extremely rough.

The mechanic left just after I picked it up, not back until Monday.

Could it simply be a plug gone bad?

What wires are disconnected during a tranny rebuild, that may be undone and causing this?

What else should I check?

Thanks for any help.
Tony

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Old 09-21-2012, 10:23 PM   #2
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Update:
Trans fluid all over the driveway.

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Old 09-21-2012, 11:11 PM   #3
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Probably just needs some new wiper blades or something
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Old 09-22-2012, 10:03 AM   #4
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I'm guessing you have an automatic, so will suggest you check the CPS (crankshaft position sensor). May be a loose connection or something interrupting the circuit.
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Old 09-22-2012, 07:35 PM   #5
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Thanks Evpjr, I've decided to have the shop come and pick it up on Monday since there fluid all over my driveway. They can have it back for a few days since I spent $1800 and have a 2yr warranty. If the leak never happened I'd look into the hesitation problem, but since it did I'm a bit PO'd.

I will mention the CPS to him though, thx.
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