GMC 2500 hesitates to enter 4 gear
#1
05-05-2015, 02:17 PM
GMC 2500 hesitates to enter 4 gear
Hi all,
I'm new to my 2003 GMC Yukon XL 2500 and I'm not fully sure if the tranny works as it should. On flat road, I need to exceed approximately 55 Mph before it decides to shift to 4th gear. I have a 496 (8.1Litre), 4L85E and 3:73 diff. I have changed tranny oil and filter, but that didn't change anything.
Is this what I should expect? Or should the tranny be tuned and is it only possible to tune the tranny with a Tech2?
Sven-Erik
I'm new to my 2003 GMC Yukon XL 2500 and I'm not fully sure if the tranny works as it should. On flat road, I need to exceed approximately 55 Mph before it decides to shift to 4th gear. I have a 496 (8.1Litre), 4L85E and 3:73 diff. I have changed tranny oil and filter, but that didn't change anything.
Is this what I should expect? Or should the tranny be tuned and is it only possible to tune the tranny with a Tech2?
Sven-Erik
#2
05-10-2015, 09:09 PM
Yes... I believe this is normal.
The 4L60 and 4L80e transmissions at least were actually 3spds and the fourth gear was an overdrive.
The 4L60 and 4L80e transmissions at least were actually 3spds and the fourth gear was an overdrive.
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