'94 Blazer K-5

A friend just picked up a 94 Blazer (5.7 engine) and is having the following
problem:

Wheels lock when put in reverse (and sometimes, even in forward gear).

Car has L2 285/75 R 16 tires on it but it's supposed to have 245's or 265's.
He's wondering if the wrong tire size could be the problem he's having.

He does have a Tech II scantool but it couldn't get any data from the
module. Data flashed on the screen for a second - but that's it. He says
the scantool is working on other modules so I'm wondering if he could just
have a bad module that is a) not sending data to his scantool and b) sending
the wrong data to the tranny?

Any suggestions or help would be greatly appreciated.

Nadyne Nelson
[email protected]

get it on a lift and see the brakes are locked front or back, could be a
trans problem, or tranfser case also. I don't think the tech11 would help
here anyway.The tires would have to be hitting the body hard to do this, I
don't think so.
"NADYNE NELSON" <[email protected]> wrote in message
news:[email protected]...
> A friend just picked up a 94 Blazer (5.7 engine) and is having the
following
> problem:
>
> Wheels lock when put in reverse (and sometimes, even in forward gear).
>
> Car has L2 285/75 R 16 tires on it but it's supposed to have 245's or
265's.
> He's wondering if the wrong tire size could be the problem he's having.
>
> He does have a Tech II scantool but it couldn't get any data from the
> module. Data flashed on the screen for a second - but that's it. He says
> the scantool is working on other modules so I'm wondering if he could just
> have a bad module that is a) not sending data to his scantool and b)
sending
> the wrong data to the tranny?
>
> Any suggestions or help would be greatly appreciated.
>
> Nadyne Nelson
> [email protected]
>
>




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