Who likes their 8 Speed?

benjaminforeal · June 15, 2016

Thank you so much for this! Taking in my truck next week to have it serviced for this issue. It has been driving me nuts ever since I bought the truck last year.

Here you go:

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wetcoast · June 16, 2016

Mine goes back in for the third time next week. The 2-3 shift at slight pedal depression still has a good kick. All the updates are done. I don't know what they're going to do this time....

Matt_P · June 17, 2016

I have about 4500 miles and overall mine is good. I have felt one or two big clunks, but not a common occurrence. I do notice that the shifts are not smooth when the transmission is cold, but once it warms up it shifts pretty good for a truck. I don't expect the transmission to be as smooth as a sedan or SUV.

Havvkeye · June 17, 2016

I get a clunk when I go right into reverse on startup and sometimes rough shift when I am slowing down, almost stopped, and then hit the gas again.

All in all it shifts nicer than my dad's previous Ford (his 2015 is about the same as my new truck) and better than the 6spd I test drove.

FishinJ · June 20, 2016

Mine has developed the shudder/vibration at around 55-70. I can have it and M8 and the steering wheel will start vibrating and if I drop it down to M7 it immediately goes away. Towed the boat yesterday and it happen while in D. Mine does not clunk very much but does occasionally it will . Going in for service tomorrow and hopefully they can take care of it. I did not buy the truck to drive around in M7 because I like using the AFM and getting some better MGP.

Snoringbear · June 23, 2016

I get a clunk when I go right into reverse on startup and sometimes rough shift when I am slowing down, almost stopped, and then hit the gas again.

All in all it shifts nicer than my dad's previous Ford (his 2015 is about the same as my new truck) and better than the 6spd I test drove.

As I stated previously, I too really like my 6.2/8 spd as well, especially for towing my TT. However, just read an article about the upcoming F-150 3.5/10 spd. Very interesting and something to consider for sure. Especially like the tranny gear display that shows real-time the gear that's engaged. Article URL below.

http://www.trucktrend.com/news/ford-announces-ten-speed-transmission-more-torque-for-2017-f-150-ecoboost/

The Mad Veteran · June 24, 2016

I've almost driven 300 miles so far and love it.

zoomiejr2 · June 25, 2016

I have 2016 6.2 with 8 speed lifted on 35s. Have around 17000kms on it now no issues and I use it good

Sent from my E6853 using Tapatalk

Dnt · June 27, 2016

This is mine...

Straight line acceleration, no problems. Love it. Like a beast.

But the sporadic clunks down shifting while coming to a stop, the clunks from 1 to 2 to 3 while slowly driving (like a parking lot). And the shudder on v4 when driving in slow stop and go traffic from 18-25 mph drives me crazy.

And some days we're great and others I hate it.

Hey fellas just my 2 cents here. My 2014 SLT (61k miles) had the 5.3 6 speed with 3.42 and had a noticeable clunk when downshifting at low speeds UNTIL I installed a set of leaf spring u bolt clamps 5 inches in front of the axle block. This eliminated 90% of the clunking.

I have not had the 2016 Denali long enough (300 miles since friday) to judge the 6.2 8 speed and 3.23 but man this thing is a 420hp beast when compared to the 14 5.3 6 spd. Lovin it so far

Edited June 27, 2016 by MyFavTruck

Snoringbear · June 27, 2016

This is mine...

Straight line acceleration, no problems. Love it. Like a beast.

But the sporadic clunks down shifting while coming to a stop, the clunks from 1 to 2 to 3 while slowly driving (like a parking lot). And the shudder on v4 when driving in slow stop and go traffic from 18-25 mph drives me crazy.

And some days we're great and others I hate it.

Hey fellas just my 2 cents here. My 2014 SLT (61k miles) had the 5.3 6 speed with 3.42 and had a noticeable clunk when downshifting at low speeds UNTIL I installed a set of leaf spring u bolt clamps 5 inches in front of the axle block. This eliminated 90% of the clunking.

I have not had the 2016 Denali long enough (300 miles since friday) to judge the 6.2 8 speed and 3.23 but man this thing is a 420hp beast when compared to the 14 5.3 6 spd. Lovin it so far

Could be the drive shaft slip yoke binding, not sliding in and out freely. Had this problem from the get-go on my 2008 5.3. Dealer replaced two yokes and did a couple of cleaning and greasing so. But, good news, after about 100,000 miles or so the problem pretty much went away. Btw, had the problem in one of my wife's Suburbans, she went thru four while we were raising kids, can't recall which one it was. I did find a fix on the internet that some DIY guys were doing; they drilled through the female piece of the yoke, tapped holes on both sides, screwed in grease fittings, reason for doing both sides was to retain driveshaft balance. I never did this myself, but feedback results on Internet were positive as I recall.

emeryz28 · June 27, 2016

took me a little to get used to it, and it also "learns" the first 500 miles or so. Now I am at 3500 and I don't notice the extra shifting anymore, I am happy with it.

SierraMyst · June 27, 2016

Could be the drive shaft slip yoke binding, not sliding in and out freely. Had this problem from the get-go on my 2008 5.3. Dealer replaced two yokes and did a couple of cleaning and greasing so. But, good news, after about 100,000 miles or so the problem pretty much went away. Btw, had the problem in one of my wife's Suburbans, she went thru four while we were raising kids, can't recall which one it was. I did find a fix on the internet that some DIY guys were doing; they drilled through the female piece of the yoke, tapped holes on both sides, screwed in grease fittings, reason for doing both sides was to retain driveshaft balance. I never did this myself, but feedback results on Internet were positive as I recall.

I do believe it may have more to do with the slip yoke.

I remember reading that mod. I'm at 4.2k miles. Going in for my 1st oil change in a couple weeks and I'm going to let them address it first before I start doing any mods like leaf spring clamps.

I also want them to road force balance the wheels. Hopefully, it'll get the last of the little vibration I have out.

dc1515 · June 27, 2016

I had my transmission reprogrammed by the dealer or so they said a few weeks. The clunking and sporadic shifting is back. Time to take it in again at the next oil change

JacobC1983 · June 28, 2016

Just got my truck traded with GM assistance. I have to say, I am glad it's over. And can't believe it was an even trade. Traded a 2015 8 speed clunker for a 2016 6 speed (possible future clunker) and it cost me $201. The MSRPs were within $200 of each other pretty amazed how well GM and my dealer stepped up for me.

Thompson Sales in Springfield MO is a great dealer!