Chevy Impala SS Forum banner

1 - 8 of 8 Posts

·
Premium Member
Joined
·
2,090 Posts
Discussion Starter #1
Hi everyone,

I have a 95 Roadmaster that I just put 275/50/17 rears and 275/40/17 fronts on, and now I have an ABS light. All I want is to change the tire size to get my ABS back. Obviously looking for one that's not still paired with a vin lol. Please let me know.

Thanks,

Tony
 

·
Registered
Joined
·
943 Posts
Bosch ABS is not part of the PCM.

You can reprogram the PCM to correct the speedometer and the shift point but the ABS will not be fixed.

You could change the reluctor in the axle.
 

·
Premium Member
Joined
·
2,090 Posts
Discussion Starter #3
I didn’t realize that, I thought that changing the tire size via the Hypertech would fix the ABS.

Thank you for explaining this to me. I’ll see if anyone has one anyway, but that really makes it less interesting.

Thanks again
 

·
Registered
Joined
·
6,747 Posts
ABS won't tolerate differences in tire height between front/rear more than 5%,maybe even a little less...
 

·
Registered
Joined
·
1,491 Posts
What's the maximum difference between an inner rear wheel and its diagonally opposite outer front wheel in a turn?
It'd need to be less than that, which I suspect is under 3%.

Both our PCM and ABSM expect the same size tires at all 4 wheels.
 

·
Registered
Joined
·
6,747 Posts
The ABS is looking for the same wheel speeds front,and rear...
 

·
Registered
Joined
·
584 Posts
I have a Hypertech Power Programmer that has been sitting dormant in my closet for years.

I use TunerCats for my tuning and this is no longer necessary for my Impala. Well other than my Impala is no longer stock.

If you are interested, please PM and make offer.

Michael
 

Attachments

1 - 8 of 8 Posts
Top