Couple issues after 15" rear conversion
Thread Starter
Racer
Joined: Apr 2012
Posts: 463
Likes: 5
From: Salisbury PA.
Couple issues after 15" rear conversion
Just completed my 15" rear wheel conversion on my 2018 grand sport. Everything went smooth and I doubled checked everything after the install.
the cats been parked all winter and I did have to use the battery jumper to start sfter it was done.
during the first drive I had received the service e rear axle message, service parking brake dash light, brake dash light, and stabilitrack dash light.
evening else on the car seems good, it does have 25k miles and is on the original battery, could the battery be going south causing all the tech nannies to freak out or am I overlooking something simple after doing the conversion?
I appreciate any help!!
the cats been parked all winter and I did have to use the battery jumper to start sfter it was done.
during the first drive I had received the service e rear axle message, service parking brake dash light, brake dash light, and stabilitrack dash light.
evening else on the car seems good, it does have 25k miles and is on the original battery, could the battery be going south causing all the tech nannies to freak out or am I overlooking something simple after doing the conversion?
I appreciate any help!!
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Drifting
Joined: Jun 2000
Posts: 1,577
Likes: 99
From: Dubai, UAE
My car had similar symptoms plus other things. Had to monitor the voltage in HPT scan and found it fluctuating between 16-12 volts . Replaced the alternator and the reading became a straight line at 14.2-14.3 volts
Thread Starter
Racer
Joined: Apr 2012
Posts: 463
Likes: 5
From: Salisbury PA.
during a log with a scanner I verified the connection did not skip a beat for the weeks sensor speeds when the lights would activate while driving.
at this point I'm almost certain it's either the tire size combo that I'm running, 325-50-15 and 225-40-18's OR the fact that I do not have any TPMS sensors installed.
I will however log tomorrow with hp tuners to double check to male sure my voltsge isnt fluctuating out of range.
Melting Slicks
Joined: Oct 2010
Posts: 3,029
Likes: 794
From: Tollesboro Kentucky
Thread Starter
Racer
Joined: Apr 2012
Posts: 463
Likes: 5
From: Salisbury PA.
Tire Size Comparison
Way too much difference!
Way too much difference!
this is my best assumption but again I have no physical way to verify since I no longer have any stock wheels lol
Thread Starter
Racer
Joined: Apr 2012
Posts: 463
Likes: 5
From: Salisbury PA.
Problem resolved
I went from a 225/40-18 up to a 225/45-18. This made the tire size ratio front to rear about one inch closer and has solved the issue.
thanks everyone, wanted to make sure i posted the fix incase someone else runs into the same issue.
I went from a 225/40-18 up to a 225/45-18. This made the tire size ratio front to rear about one inch closer and has solved the issue.
thanks everyone, wanted to make sure i posted the fix incase someone else runs into the same issue.
Instructor
Joined: Jan 2021
Posts: 155
Likes: 23
From: CT
Glad you got it figured out. So now where are the picture's with the the 15's on!!