Is my Range masking potential defect
Team Owner
Joined: Feb 2013
Posts: 22,598
Likes: 14,556
Melting Slicks
Joined: May 2006
Posts: 2,303
Likes: 40
From: Edmonton Alberta
I looked at the Range and the DiabloSport Predator and DiabloSport Intune. I'm eventually panning on a Magnuson Supercharger install which will delete the AFM, so no big deal for me.
Drifting
Joined: Nov 2016
Posts: 1,323
Likes: 420
From: Eastern NC
No it will not mask it. Once it starts giving issues you will tell the shifts are jacked up even with the Range plugged in. Pull it out and you will experience terrible jumping. Best to trade it in afterwards for an M7 like i did. 
Drifting
Joined: Jul 2007
Posts: 1,587
Likes: 90
You just can't let well enough alone, always think you're smarter than the GM engineers. Really?
Team Owner
Joined: Feb 2013
Posts: 22,598
Likes: 14,556
Yes... read up. GM has no fix for the trans. Best to avoid it. They’ve revised the “fix” 3 or 4 times now. First it was replacement of converter, then trans, then triple fluid flush and new TCM tuning, then a totally new fluid and some folks still have issues. Multiple folks in our club have had all the fixes and still have the shudder.
Pro
Joined: Feb 2019
Posts: 630
Likes: 384
From: Florida
Don't know about any "masking" but I installed my Range Technologies AFM Disabler at the 600 mile point and it will stay there until I sell the car. I never want to see the green "V4" on my dash ever again.
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Burning Brakes
Joined: Jun 2015
Posts: 1,223
Likes: 650
Don't wait too long to do the s/c otherwise you will definitely run the risk of damaging the TC. Better to buy the range for 179 bucks now as insurance against the shudder issue. Believe me you don't want to got through that. It took me the better part of three months in the shop to get my ZO6 straightened out with the shudder problem. I recently got a 2019 Grand Sport and the first thing I did was plug in the Range module with 6 miles on the OD.
Burning Brakes
Joined: Jun 2015
Posts: 1,223
Likes: 650
The GM engineers blew it on this one. The Range disabler doesn't mask the problem; it prevents it from occurring by eliminating the constant clutching/de-clutching in the TC in V4 mode. If the shudder problem is already present the module won't do you any good. Damage is already done.
Burning Brakes
Joined: Apr 2004
Posts: 1,022
Likes: 102
From: Sarasota FL
St. Jude Donor '13
GM does have a fix for the 8 speed shudder problem and it works. I know as my car had the problem and the new 2019 flush took care of it. If you do your research you will see that the new fluid solves the problem 99% of the time. I had my fluid changed in late 2018 and that did not fix the problem but the new 2019 fluid finally did the trick, no more shudder.
The shudder problem happens in less than 10% of the cars with the 8 speed and GM has never given a good answer on why it doesn't happen to all of the them. It is not just the Corvette that has the shudder problem, it is ANY vehicle made with the 8 speed. I do agree with buying a extended warranty for peace of mine, I purchased the GM one for 5 years or 40K to be safe.
Attached is a GM Techlink article from January 2019 explaining why the new 2019 fluid solves the problem.
John
The shudder problem happens in less than 10% of the cars with the 8 speed and GM has never given a good answer on why it doesn't happen to all of the them. It is not just the Corvette that has the shudder problem, it is ANY vehicle made with the 8 speed. I do agree with buying a extended warranty for peace of mine, I purchased the GM one for 5 years or 40K to be safe.
Attached is a GM Techlink article from January 2019 explaining why the new 2019 fluid solves the problem.
John
Team Owner
Joined: Feb 2013
Posts: 22,598
Likes: 14,556
The GM engineers blew it on this one. The Range disabler doesn't mask the problem; it prevents it from occurring by eliminating the constant clutching/de-clutching in the TC in V4 mode. If the shudder problem is already present the module won't do you any good. Damage is already done.
Instructor
Joined: Nov 2006
Posts: 129
Likes: 60
From: Whitman Ma
GM does have a fix for the 8 speed shudder problem and it works. I know as my car had the problem and the new 2019 flush took care of it. If you do your research you will see that the new fluid solves the problem 99% of the time. I had my fluid changed in late 2018 and that did not fix the problem but the new 2019 fluid finally did the trick, no more shudder.
The shudder problem happens in less than 10% of the cars with the 8 speed and GM has never given a good answer on why it doesn't happen to all of the them. It is not just the Corvette that has the shudder problem, it is ANY vehicle made with the 8 speed. I do agree with buying a extended warranty for peace of mine, I purchased the GM one for 5 years or 40K to be safe.
Attached is a GM Techlink article from January 2019 explaining why the new 2019 fluid solves the problem.
John
The shudder problem happens in less than 10% of the cars with the 8 speed and GM has never given a good answer on why it doesn't happen to all of the them. It is not just the Corvette that has the shudder problem, it is ANY vehicle made with the 8 speed. I do agree with buying a extended warranty for peace of mine, I purchased the GM one for 5 years or 40K to be safe.
Attached is a GM Techlink article from January 2019 explaining why the new 2019 fluid solves the problem.
John
The range works to prevent the switch from v4 to v8, but I also discovered it prevents data from being captured / sent to OnStar and also prevents certain emissions data from being collected (this caused me to fail my emission testing the first pass). I had to drive without the Range device for 250 miles to get the emissions data captured.
Burning Brakes
Joined: Jun 2015
Posts: 1,223
Likes: 650
I have to agree here. I had the shudder problem in my 2016 back in 2017. I had the original triple flush done and the shudder came back towards the middle of 2018. I purchased a range and installed it and the problem "went away" while the range was installed. I brought the car in this past March to have the new fluid change done and have been driving problem free for over 2500 miles now, without the Range device.
The range works to prevent the switch from v4 to v8, but I also discovered it prevents data from being captured / sent to OnStar and also prevents certain emissions data from being collected (this caused me to fail my emission testing the first pass). I had to drive without the Range device for 250 miles to get the emissions data captured.
The range works to prevent the switch from v4 to v8, but I also discovered it prevents data from being captured / sent to OnStar and also prevents certain emissions data from being collected (this caused me to fail my emission testing the first pass). I had to drive without the Range device for 250 miles to get the emissions data captured.
Burning Brakes
Joined: May 2015
Posts: 930
Likes: 333
From: Sherrills Ford North Carolina
OK... My Mercedes C350 would kill the engine when you stopped. I'm sure this added wear and tear on the engine. Mercedes added it to get the MPG higher and I disabled it. I'm assuming GM did the same thing to our C7 to raise the MPG.
Not that I purchased my C7 for a high millage car, but whats the MPG hit when V8 to V4 is disabled. I would do this in a minute, but $180 is a high price for it.. IMO. 1300 mile road trip last week got me 28.8 mpg. Same as my MB only my C7 has 150 more HP!!!
Not that I purchased my C7 for a high millage car, but whats the MPG hit when V8 to V4 is disabled. I would do this in a minute, but $180 is a high price for it.. IMO. 1300 mile road trip last week got me 28.8 mpg. Same as my MB only my C7 has 150 more HP!!!
Last edited by Tommy79; Jun 21, 2019 at 04:59 PM.
Burning Brakes
Joined: Jun 2015
Posts: 1,223
Likes: 650
OK... My Mercedes C350 would kill the engine when you stopped. I'm sure this added wear and tear on the engine. Mercedes added it to get the MPG higher and I disabled it. I'm assuming GM did the same thing to our C7 to raise the MPG.
Not that I purchased my C7 for a high millage car, but whats the MPG hit when V8 to V4 is disabled. I would do this in a minute, but $180 is a high price for it.. IMO. 1300 mile road trip last week got me 28.8 mpg. Same as my MB only my C7 has 150 more HP!!!
Not that I purchased my C7 for a high millage car, but whats the MPG hit when V8 to V4 is disabled. I would do this in a minute, but $180 is a high price for it.. IMO. 1300 mile road trip last week got me 28.8 mpg. Same as my MB only my C7 has 150 more HP!!!
Burning Brakes
Joined: May 2015
Posts: 930
Likes: 333
From: Sherrills Ford North Carolina
Mgp
After 3 years (30k) and using this formula, the cost of the device and the loss of mpg would be almost $600. About 50% cost of a total warranty. I may be missing something and do want to avoid any TC issues... But also want to be cost effective in my choices.
All this said.... I still may buy it... Just would also want it out of my way... Not hanging down in my car.
Last edited by Tommy79; Jun 21, 2019 at 06:22 PM.