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Old 10-03-2007, 05:20 PM
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95 chevy silverado

Hey got a 95 chevy silverado with a 350 in it but not sure exactly what type of trans is in it.Just auto is all I know.When I pull it down in R is shifts really hard then when I pull it down into OD I start off in what feels like third and it never changes from that gear all the way down the road.At the same time all of this happens the guages(RPM ,and speedo.) dont work ......That is the only time the trans acts up like this.(when the guages arent working) Any help would be great, thanks!!

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Old 10-03-2007, 06:26 PM
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sounds likethe trans is in limp mode third gear due to a loss of power both shift solenoids off (no power) will give you a third gear start and with the guages and all I would start at the ignition switch but you definatley have an electrical problem however the tranny should be a 4l60e...also with the shifting hard the EPC is at max with no power so you have high line pressure which is making it shift hard or engage hard whichever its doing
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Old 10-03-2007, 09:09 PM
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there was a TSB on a bad or cracked circuit board of the PCM in this year of vehicle/truck / SUV .... it would cause intermittent shift problems.

Something to do with adding a ground wire kit at the computer it's self.

Could be a corrosion / Ground problem IF you live in the rust belt
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Old 10-04-2007, 07:10 AM
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95 chevy

Crosley I think the TSB you are refering to is service bulletin update 667103, the part # is 12167310, this is a Delco number. This update was designed to address a poor line rise condition and is a ground wire installed into the computer, as you said.

Since I do live in the "rust belt", we keep one of these kits "in stock".

This particular problem that tripp68 has, with the gauges wacking out and all that other stuff, is not a problem that I have seen yet, have heard of it though.

As was suggested by performabuilt2 there is a ignition harness, near the bottom of the steering column that was a problem, and causing these types of concerns.
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Old 10-04-2007, 08:29 AM
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Quote:
Originally Posted by briscoe
Crosley I think the TSB you are refering to is service bulletin update 667103, the part # is 12167310, this is a Delco number. This update was designed to address a poor line rise condition and is a ground wire installed into the computer, as you said.

Since I do live in the "rust belt", we keep one of these kits "in stock".

This particular problem that tripp68 has, with the gauges wacking out and all that other stuff, is not a problem that I have seen yet, have heard of it though.

As was suggested by performabuilt2 there is a ignition harness, near the bottom of the steering column that was a problem, and causing these types of concerns.


seems like I remember there a problem with a crack on a board near a pin connection on the PCM??

the TSB was to repair that?

It's been a while .

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Old 10-04-2007, 08:53 AM
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95 chevy

I'm not sure about a "crack" , this would be the first time I've heard of that, actually the 2nd time [ refering to your first post ]

There was some issue with a harness outside ,on the firewall I remember reading about, I'll check my catalog of TSBs.

And also Tony, I am waiting for my saab guy to call me back, although as of 10:50 am, he has not made it to work yet. Nice gig, if you can get it!
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