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Old 10-17-2011, 03:37 PM
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Default Transmission valve body question...

My 99 blazer has 140,000 miles. I am noticing after running on the highway for an hour or two that when I get off the exit and start from a light or stop sign that I'm gettting a hard 1-2 shift. It doesn't do it all the time, mainly after having been at highway speeds.

A tranny shop where I have had work done before with good results, said it's most likely the valve body and needs to be fixed. About $400 to do it. But, if they drop the pan and see shavings, plastic parts, and overall "crap" in their then I'm looking at a rebuild.

What do you guys think at this mileage, could it just be the valve rebuild or am I looking at whole rebuild?

One other thing related...I occasionally get a slight shudder when taking off from a stop. Doesn't feel like the torque converter, the Ujoints are tight, motor and tranny mounts are good.

Any help appreciated.

Last edited by babeba67; 10-17-2011 at 03:40 PM.
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Old 10-17-2011, 08:37 PM
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1998 Chevrolet Blazer
Join Date: Jul 2011
Location: Reading, PA
Posts: 659
Mike98Blazer will become famous soon enough

I just had my valve body rebuilt and a Transgo shift improver/P1870 fix kit installed as well as both shift solenoids A and B replaced at 145,000 miles. No problems since (other than the shift kit doesn't like it when i baby the truck which i do most of the time)

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Old 10-20-2011, 03:06 PM
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It could just be the valve body. I had to do mine but I have less miles than you. $400 is a good price too. I did my own and it cost me nearly $300 just for the rebuilt valve body and tranny fluid.
2000 Chevy Blazer LS.
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Old 10-20-2011, 03:06 PM

2000, blazer, blazertrans, body, chevrolet, chevy, control, cost, forum, rebuilt, selenoid, shift, transmision, transmission, valve, velve

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