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  #13  
Old 07-19-2013, 09:40 AM
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Re: A favor to ask of anyone with the 8spd transmission

I originally thought the same, that it wasn't a software issue if this was still felt during manual paddle shifts, but the paddle shifts aren't truly manual. I think it just effects the actual shift points, but there is a component that is still controlled by the TCM.

if driving a manual car, you'd control the transmission with the stick shift, the clutch and gas. Our paddle shift just tells the module which shift point, but the rest is still being managed by the software. not sure if that makes sense...but it's the best I can do.

I believe that the rpm need to be higher between shifts in order to avoid the gear shift clunk. when on the gas pedal, without lifting off, the 1-2 shift is smooth...notice where the rpms are. But, as noted in this test, when off the gas and making that 1-2 shift, the rpms are very low and results in a clunk.

going back to my example with a manual car, it would be like dumping the clutch from 1-2 without gas, the shift is going to be rough...more or less depending on the gear ratios.

any thoughts?

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Originally Posted by hemi15 View Post
I wrote this in another tread yesterday.
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  #14  
Old 07-19-2013, 09:44 AM
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Re: A favor to ask of anyone with the 8spd transmission

Don't take your foot off the gas before shifting from first to second.

You are correct ... There is no manual shifting, just user selectable gears.
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Old 07-19-2013, 09:48 AM
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Re: A favor to ask of anyone with the 8spd transmission

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Originally Posted by bill_de View Post
Don't take your foot off the gas before shifting from first to second.

You are correct ... There is no manual shifting, just user selectable gears.
---
This becomes a problem in stop and go traffic in auto mode. If I dont take my foot off the gas I will hit the car in front of me and as soon as I took my foot off the gas the tranny shifts into 2.
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Old 07-19-2013, 09:52 AM
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Re: A favor to ask of anyone with the 8spd transmission

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Originally Posted by nj newb View Post
I originally thought the same, that it wasn't a software issue if this was still felt during manual paddle shifts, but the paddle shifts aren't truly manual. I think it just effects the actual shift points, but there is a component that is still controlled by the TCM.

if driving a manual car, you'd control the transmission with the stick shift, the clutch and gas. Our paddle shift just tells the module which shift point, but the rest is still being managed by the software. not sure if that makes sense...but it's the best I can do.

I believe that the rpm need to be higher between shifts in order to avoid the gear shift clunk. when on the gas pedal, without lifting off, the 1-2 shift is smooth...notice where the rpms are. But, as noted in this test, when off the gas and making that 1-2 shift, the rpms are very low and results in a clunk.

going back to my example with a manual car, it would be like dumping the clutch from 1-2 without gas, the shift is going to be rough...more or less depending on the gear ratios.

any thoughts?
Yes I agree it is not like the manual in manual mode. you just tell the tranny when to shift. I tried revving it up in 1st gear then foot off the gas and shift still get the clunk.

In a manual car if you release clutch slow enough it wont be rough. And it is just the opposite in a manual car. the shifts will be rough when the RPM increase uless you match the rpm with gas pedal but it will be smoother at low rpm even if you dont push the gas pedal.
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Old 07-19-2013, 09:53 AM
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Re: A favor to ask of anyone with the 8spd transmission

haha, exactly...BUT, it doesn't resolve the fact that there is something wrong with how low rpm 1-2 shifts are handled by the truck.

so yes, it can be avoided, but it would be nice to not have the issue to begin with.

Quote:
Originally Posted by bill_de View Post
Don't take your foot off the gas before shifting from first to second.

You are correct ... There is no manual shifting, just user selectable gears.
---
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Old 07-19-2013, 02:43 PM
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Re: A favor to ask of anyone with the 8spd transmission

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Originally Posted by nj newb View Post
haha, exactly...BUT, it doesn't resolve the fact that there is something wrong with how low rpm 1-2 shifts are handled by the truck.

so yes, it can be avoided, but it would be nice to not have the issue to begin with.
Do a search on here for rough 8 speed transmission issues. Last I checked there are at least 4...but if you ask chrysler, they have absolutely no idea what you are talking about...EVERYTHING is normal.
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Old 07-20-2013, 08:48 AM
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Re: A favor to ask of anyone with the 8spd transmission

I have the v6 and can confirm you hear and feel the clunk.

Also, in Eco mode, if you let off the accelarator at 20 mph (5th gear) you feel a heavy downshift to 4. That same thing happens at 15 mph when shifting into 3rd.

The only way you feel a smooth tranny in this car is flooring it off the line and then slowing down very quickly. Doesn't make much sense, but this has been happening from day one.

Will be bringing it into the shop next week for this and a number of other problems.
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Old 07-20-2013, 01:17 PM
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I have v6 overland. I have felt an occasional light clunk in low speed shifting but has not been consistent or frequent. Is that the trans shifting issue that people are reporting?

I drive in Eco mode and auto (D) most of the time. I have a fairly light foot on the gas. Most of my driving is highway but in NJ do hit highway traffic and back roads but not heavy city stop and go situations.
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Old 07-20-2013, 07:33 PM
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Exactly the same for me gcl2014 !!!!
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Old 07-21-2013, 08:08 AM
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Exactly the same for me gcl2014 !!!!
Same for me. If you are all feeling this you need to make a dealership appt and demand a star report so we can put this on the map. Other members with insider info are saying the amount of ppl who have gone to dealerships are so low it's not yet statistically significant.
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Old 07-31-2013, 04:56 PM
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Re: A favor to ask of anyone with the 8spd transmission

Similar to my limited v6, I can hear same clunk when shift from D to N at low speed or stop.
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Old 07-31-2013, 08:59 PM
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Re: A favor to ask of anyone with the 8spd transmission

I have the felt the same in my V6 overland,
Only a hand full of times.
As I'm a automotive technician. I feel yes
It should not shift that hard, but it seems to happen
When you are at that right RPM in between gears.
I'm personally going to wait for some more updates
To come out.
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