Who likes their 8 Speed?

Dirt-Rado · May 13, 2017

17 6.2L 4WD 8 speed. Only 1500 miles so far.

Mine clunks here and there but a lot less now that it's learned my driving a. It. Also jerks right at the stop which is irritating. Can't imagine that with a trailer behind me...

overall I'm happy with it due to the freeway driving mileage. Leveling kit and 33"s getting 17avg MPG. Not sure I would get the same with the 6 speed.

For sure the programming in this 8sp is junk .

Snoringbear · May 14, 2017

Here's an article in the latest Truck Trend mag about the new Ford/GM 10 speed tranny and to some extent the GM 8 speed tranny. The article gave me some appreciation for how complex the new 10 spd (and 8 spd) is for sure. I'm amazed that it works at all. Anyway, thought I would share.

http://www.trucktrend.com/features/1704-interview-kurt-nickerson-ford-technical-leader-transmission-attributes-and-calibration/

powerhaulic · May 14, 2017

I also believe the fluid is a major contributor in shifting issues. I believe GM made a mistake is the spec for the new HP fluid

I am seriously considering a flush and refill with Amsoil, obviously at my cost

muhsfink07 · May 30, 2017

what type of fluid should we use then? specific weight and type

03SP500 · May 30, 2017

Sorry

Edited May 30, 2017 by 03SP500

mookdoc6 · May 30, 2017

That service bulletin has been around even though it seems to be new, it's really not. This is all VIN specific, so most people will not be involved......

Edited May 30, 2017 by mookdoc6

Bigmac · May 30, 2017

Mine has the TQ shutter. Even after replacing converter it was still present. They did the multi flush with the newer fluid and it helped about 50%. Driving to see if it helps for the summer

Dnt · May 31, 2017

I recently traded in my 2016 1500 Denali 6.2 8 spd with 19,000 miles for a new 17 1500 Denali 6.2 8spd.

2016 8 spd had over 19,000 miles. pretty darn smooth, rarely if ever a harsh downshift just when slowing down a hill to a redlight to stop (one certain redlight in my little town) . Upshifts were always good. I was pretty pleased with the 8 spd on that one.

2017 8spd Hmmmm a little different, seems to have multiple harsh downshift episodes with some jerking motions "HOWEVER" I only have 900 miles on it so far so going to see if it is actually smart enough to "LEARN" anything over the next few thousand miles. It is for sure different from the 16 which is an identical truck except this 17 has a std bed and has 22's instead of 20" wheels. Not to concerned just yet. I will try to remember to post back in a few months with a update. 17 is purty though haha

powerhaulic · June 1, 2017

12000 miles since October when I got this truck, I am very happy.

Shifts great 98% of the time, no complaints.

currently commuting for 8 weeks 120mi per day, mostly under 72mph averaging 22mpg

Threerun · June 1, 2017

I'm currently at 12,000 miles since December in my 2016 LTZ 6.2 8spd. Only an occasional clunk or weird lurch, but 99.5% of the time it's smooth as silk. I'm pretty impressed with it..

Snoringbear · June 1, 2017

I saw some posts about DIY'ers extracting 4.5 qts through the dip stick tube then do two or three repetitions so to purge most of the original fluid. I can't find a transmission dip stick on my spd and if I recall correctly this tranny is factory sealed and requires dealer trained techs to do anything to it. What are these guys talking about? Anybody know?

Snoringbear · June 1, 2017

I recently traded in my 2016 1500 Denali 6.2 8 spd with 19,000 miles for a new 17 1500 Denali 6.2 8spd.

2016 8 spd had over 19,000 miles. pretty darn smooth, rarely if ever a harsh downshift just when slowing down a hill to a redlight to stop (one certain redlight in my little town) . Upshifts were always good. I was pretty pleased with the 8 spd on that one.

2017 8spd Hmmmm a little different, seems to have multiple harsh downshift episodes with some jerking motions "HOWEVER" I only have 900 miles on it so far so going to see if it is actually smart enough to "LEARN" anything over the next few thousand miles. It is for sure different from the 16 which is an identical truck except this 17 has a std bed and has 22's instead of 20" wheels. Not to concerned just yet. I will try to remember to post back in a few months with a update. 17 is purty though haha

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What caused you to trade an identical, perfectly working 16 for a 17? Just curious. I may want to try it on my wife, lol ....

JB Z71 · June 1, 2017

So the consensus is the 5.3 8 spd is no problem?

powerhaulic · June 2, 2017

I saw some posts about DIY'ers extracting 4.5 qts through the dip stick tube then do two or three repetitions so to purge most of the original fluid. I can't find a transmission dip stick on my spd and if I recall correctly this tranny is factory sealed and requires dealer trained techs to do anything to it. What are these guys talking about? Anybody know?

Trans is not sealed, but it does lack a dipstick.

It has an overflow tube in the pan, fluid needs to be checked at just over 100deg by removing a plug

Dnt · June 2, 2017

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What caused you to trade an identical, perfectly working 16 for a 17? Just curious. I may want to try it on my wife, lol ....

I wanted a Blue Truck. I really liked the 16 but red was not my color. Upgrade cost was negligible (sold old truck myself for a good price and got an awesome deal on the new one at Laura over 13k off sticker)