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100 mph Governor

Mikejonce

By Mikejonce
in Troubleshooting & Recalls

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  • 3 months later...
  • Replies 59
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Chuh Enthusiast

Chuh

Posted
Posted

Just to let you all know... I hit the chip @ 111 mph after the second oil change ~8500 mi

JRaschke11 Enthusiast

JRaschke11

Posted
Posted

It's actually 98 mph.

 

I've driven 101 on a flat road according to the speedometer on my 2015 Sierra Denali 6.2. It didn't cut out when it got there either, I sat there without issue. I bought it brand new with 0 miles and it has a Borla ATAK catback exhaust, Elite Engineering catch can, AIRAID dry synthetic filter in the stock air box, and AIRAID intake tube.

 

This was through the middle of the desert of Utah where the speed limit is 80 mph. Flat road as far as you can see on a smooth highway without another soul in sight, so nobody lecture me on speeding. I wouldn't drive like that in a populated area.

pm26 Senior Enthusiast

pm26

Posted
Posted

Hmm, I'm not following that one. I can see the engine RPM's the same at those 2 speeds, but the driveshaft would be spinning like crazy at 100mph.

Not necessarily if you are in the top gear. The driveshaft will spin faster in any gear when tthe engine RPM is taken to the redline manually, except this would be for short periods only. The key here is that these driveshaft U joints are not designed to take sustained high speed operation.

Ron.s Enthusiast

Ron.s

Posted
Posted

My 14 with 6.2 is totally stock and just did a sped run on a Utah freeway. Over 110 for a short burst when the road was clear and no rev limiter. Also no vibration.

alloutJ4 Enthusiast

alloutJ4

Posted
Posted

good to know i was planning on removong my limiter as well as i will be on the autobahn, clearly going to have to re think this through.

vonshep Enthusiast

vonshep

Posted
Posted

I would think that the drive shaft RPM would be tied to the rear and axles speeds not the engine RPM at 100 mph the tires would spin faster than at lower speeds thus causing a higher RPM on the drive shaft . The biggest issue would be anything the slightest bit out of balance would be exaggerated at the higher speeds and the differential that is not designed to operate at such high rpms may cause issues .The other concern would be operating a vehicle at high speeds that the suspension and brakes may not be up the job its a pickup not a Ferrari

  • 3 weeks later...
avgas Enthusiast

avgas

Posted
Posted

My 14 with 6.2 is totally stock and just did a sped run on a Utah freeway. Over 110 for a short burst when the road was clear and no rev limiter. Also no vibration.

My brother has a 2014 Denali with the 6.2L and it does not cut out at 100 MPH.

 

I have a 2014 Sierra with the 5.3L and it does cut out at 100 MPH.

ruggerag Enthusiast

ruggerag

Posted
Posted

We have speed limits of 85, so I need to get a tune to remove my 98 governor. Really sucks trying to pass a truck moving at 88 mph on a single lane and only having a couple mph over him.

  • 2 weeks later...
Snoringbear Enthusiast

Snoringbear

Posted
Posted

I traded my 2008 5.3L Silverado Crew in for a 2015 LTZ 6.2L 4x4 Crew in May. I bought the 2015 with 6.2L so to have more muscle with pulling my 25' camper. Does great btw. But, started reading towing comparisons between F-150 3.5L ecoboost and GM 6.2L and invariably to Ford would have better times in 1/4 mile pull-off. In the analysis, writers would usually comment that the GM 6.2 limiter later in the test than the Ford 3.5. So, this caused my antennas to perk up questioning "what's this limiter about"? Anyway, after some noodling on this these comparative tests reminded me of drag racing back in the day when small block Chevy 283/327's with 4.11 rear ends ruled street racing. Would hit about 95 ~ 100mph 2/3 of the way and then flatten out. Anyway, now that I understand the game - which is all about which truck has the higher differential ratio, these comparative towing contests are useless as far as I'm concerned. Just rambling, sorry :) oh, btw, love my 6.2L, pulls my camper like it's not even there.

redwngr Senior Enthusiast

redwngr

Posted
Posted

I traded my 2008 5.3L Silverado Crew in for a 2015 LTZ 6.2L 4x4 Crew in May. I bought the 2015 with 6.2L so to have more muscle with pulling my 25' camper. Does great btw. But, started reading towing comparisons between F-150 3.5L ecoboost and GM 6.2L and invariably to Ford would have better times in 1/4 mile pull-off. In the analysis, writers would usually comment that the GM 6.2 limiter later in the test than the Ford 3.5. So, this caused my antennas to perk up questioning "what's this limiter about"? Anyway, after some noodling on this these comparative tests reminded me of drag racing back in the day when small block Chevy 283/327's with 4.11 rear ends ruled street racing. Would hit about 95 ~ 100mph 2/3 of the way and then flatten out. Anyway, now that I understand the game - which is all about which truck has the higher differential ratio, these comparative towing contests are useless as far as I'm concerned. Just rambling, sorry :) oh, btw, love my 6.2L, pulls my camper like it's not even there.

Is your 6.2 a max tow?

Snoringbear Enthusiast

Snoringbear

Posted
Posted

"Is your 6.2 a max tow?"

 

No, don't have the Max Tow package. Differential is a 3.23 which apparently is kinda rare. Actually, I'm glad I don't have the MT as mpg is very good with 8 speed tranny matched with 3.23 rear end. And, it tows my 25' travel trailer great (approx 6,500 lbs).

 

Btw, I have about 12k miles on my truck and to-date have not experienced any of the vibrations described in this blog, knock on wood :)

redwngr Senior Enthusiast

redwngr

Posted
Posted

"Is your 6.2 a max tow?"

 

No, don't have the Max Tow package. Differential is a 3.23 which apparently is kinda rare. Actually, I'm glad I don't have the MT as mpg is very good with 8 speed tranny matched with 3.23 rear end. And, it tows my 25' travel trailer great (approx 6,500 lbs).

 

Btw, I have about 12k miles on my truck and to-date have not experienced any of the vibrations described in this blog, knock on wood :)

 

I don't think you can call 3.23 'rare'.

 

It is the standard ratio used with the 8 speed /6.2L combination.

 

I was just curious which ratio you were towing with. My 15 was also a 6.2/8sp/3.23. It also towed like a champ, but my tow loads have been considerably smaller.

 

 

Both it and current ride have been vibration free. Both on 20's. last one was a z71 on SRA's. This one is not z71, and is on eagles.

Snoringbear Enthusiast

Snoringbear

Posted
Posted

"I don't think you can call 3.23 'rare'.

 

It is the standard ratio used with the 8 speed /6.2L combination.

 

I was just curious which ratio you were towing with. My 15 was also a 6.2/8sp/3.23. It also towed like a champ, but my tow loads have been considerably smaller. "

 

Ok, I retract the word "rare". Does that make it all better now?

Snoringbear Enthusiast

Snoringbear

Posted
Posted

Concerning the drive shaft coming apart; think pole vault - in a full size truck - at 100+mph - would be quite a ride I think, heh heh, whahoo !

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