Tranny Shifting

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Old 04-14-08, 04:53 PM
LouBazooka's Avatar
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Tranny Shifting

Hey guys another one for you my wife's Suburban sometimes
shifts funny almost like a " jerk " when up shifting, it doesn't do it all the time mostly after a longer drive on the freeway but after turning engine off and restarting the "jerking " goes away ...
2000 Suburban K 2500 ( 4x4 ) 6.0 Liters , 111K Miles
Could it be the electronic shift modulator ? and where is it located ?
Thanks in advance
 
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Old 04-14-08, 06:18 PM
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The GM 4L80E in my wrecker does the same thing, maybe once a month or so. Fortunately it isn't often enough or serious enough to have to fix (yet).
 
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Old 04-14-08, 11:08 PM
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Yeah its a Chevy thing, I have a 2000 GMC C2500 with the 5.3 L and when I engage the tow/haul mode it does exactly the same thing when going into second gear,I just used a Slick Shift additive on the Suburban today , will let you know if it worked or not ...
 
 

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