Update: figured out popping under load in all gears/misfire - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-29-2004, 09:37 PM   #1
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Default Update: figured out popping under load in all gears/misfire

Turns out the drive chain in the 4t60-e gets stretched out (in a blower car)over the course of 153,ooo hard miles and starts jumping on the sprockets. feels just like a misfire, sounds like popping thru the throttle UNTIL you stand outside the car when it does it. Gradually gets worse too, and won't do it with car sitting still. I guess I have to buy a SRTA now, unless anyone has a better idea on a less expensive rebuilt trans. GM will end up 1700.00 after tax. I guess other parts of the transmissions go before this happens in most cases.
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Old 11-29-2004, 09:52 PM   #2
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Sorry to hear that. Had my tranny rebuilt some 5k miles ago and its not the same as before. Feels ok most of the time but sometimes its a bit jerky at certain cruise speeds.
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Old 11-29-2004, 11:10 PM   #3
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If you don't mind a used trans, you might check www.car-part.com -you can probably find one with under 80,000 miles for under $500 at a yard within 200 miles of you.
Good luck,
Martin
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Old 11-29-2004, 11:12 PM   #4
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Did a search of yards in NC, and found this one

1994
Transmission
Buick Park Ave.
BRAND NEW GM REMAN. FIRM SUPERCHARG 80K 040001
$550
Highway 10 Auto Parts, Inc.
USA-NC(Conover)
1-800-222-8965
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Old 11-29-2004, 11:50 PM   #5
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That trans in Conover sounds good but don't the buicks have a 2.87 final drive while the Pontiac has 2.97? Can anyone confirm this?
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Old 11-30-2004, 06:59 PM   #6
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Quote:
Originally Posted by Brian95Blown
That trans in Conover sounds good but don't the buicks have a 2.87 final drive while the Pontiac has 2.97? Can anyone confirm this?
They both use the same trans, gearing and all. The drivetrain'* are identical, inside and out. Both use the 2.93'*.
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Old 11-30-2004, 07:02 PM   #7
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Cool, I bought a trans with 80,000 miles from a 94 Buick Ultra for 550.
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