first sorry on long read here but appreciate any help/suggestion,
OK so I have a 2016 2500 4x4 6.7 auto trans (non Aisin) 5500 miles,
I am having issue with it shifting funny and just plain driving funny
when going slow speeds (20-35 mph) and on windy twisty like Mountain roads, can crest a steep hill with a curve/turn and be at about 25 mph and have to let off throttle, and it was like back shift, get a BIG loud clunk, and feels like the rear end is jumping
like a screwed up back shift??
will also do this on level ground in slow moving traffic again, going say 25, slight throttle in put and have to let off , it will buck and shake the truck?/ almost feels like if you were hit from the rear and shoved forward, like a lack of fuel then a boost then real fast back off!
Next and this just started yesterday, was 5 degree's out, so cold
let truck warm up for about 10 minutes, got in and drove easy, all seemed ok for the first mile(mostly all down hill to this point so coasted mostly!)
got to a stop sign at with a left turn needed that took me up a pretty steep hill for about 1.5 miles
pulled out as normal, picking up speed easy, NO hard acceleration at all!
as it would shift from say third to 4th, it would buck and felt like trans was slipping, and grabbing and slipping, whole time would still pick up speed, but felt very BAD, like a clutch slipping!!
got up to speed limit 55 mph, and it still would do this off and on, did it for about 5 miles and then stopped>
OK maybe trans was cold??? had to be some place so kept going
30 minutes into drive, should be warm by now??? stop at a stop sign, again a big hill to get up and same deal shifting very bad and slipping and bucking
get to a farm I was headed to, and now at 25-30 mph doing same thing on level ground??
drive home, same deal here and there no hill needed
today same deal at start up, (now 60 degree's, so warmed up)
ran BAD, 5 miles in to trip got on Hwy, got up to 75 mph and was like bucking and slipping again??
for about 5 miles then all good??
what the heck could be wrong here??
calling dealer Monday, so stuck till then and looking for feedback
Thanks
and sorry on long tread!
OK so I have a 2016 2500 4x4 6.7 auto trans (non Aisin) 5500 miles,
I am having issue with it shifting funny and just plain driving funny
when going slow speeds (20-35 mph) and on windy twisty like Mountain roads, can crest a steep hill with a curve/turn and be at about 25 mph and have to let off throttle, and it was like back shift, get a BIG loud clunk, and feels like the rear end is jumping
like a screwed up back shift??
will also do this on level ground in slow moving traffic again, going say 25, slight throttle in put and have to let off , it will buck and shake the truck?/ almost feels like if you were hit from the rear and shoved forward, like a lack of fuel then a boost then real fast back off!
Next and this just started yesterday, was 5 degree's out, so cold
let truck warm up for about 10 minutes, got in and drove easy, all seemed ok for the first mile(mostly all down hill to this point so coasted mostly!)
got to a stop sign at with a left turn needed that took me up a pretty steep hill for about 1.5 miles
pulled out as normal, picking up speed easy, NO hard acceleration at all!
as it would shift from say third to 4th, it would buck and felt like trans was slipping, and grabbing and slipping, whole time would still pick up speed, but felt very BAD, like a clutch slipping!!
got up to speed limit 55 mph, and it still would do this off and on, did it for about 5 miles and then stopped>
OK maybe trans was cold??? had to be some place so kept going
30 minutes into drive, should be warm by now??? stop at a stop sign, again a big hill to get up and same deal shifting very bad and slipping and bucking
get to a farm I was headed to, and now at 25-30 mph doing same thing on level ground??
drive home, same deal here and there no hill needed
today same deal at start up, (now 60 degree's, so warmed up)
ran BAD, 5 miles in to trip got on Hwy, got up to 75 mph and was like bucking and slipping again??
for about 5 miles then all good??
what the heck could be wrong here??
calling dealer Monday, so stuck till then and looking for feedback
Thanks
and sorry on long tread!