Whitehorse10

It's most likely the 4.0 engine. You're feeling the far end of the torque and hp curve as it drops off. By the way its "spur" of the moment, not "spare" of the moment.

ward_spratlin

Nope I just had a idea my car is auto turned off overdrive problem solved

ward_spratlin

Difference being

youtube.com/watch?v=6nhx3XG3Yjs&feature=channel_video_title

aaquib1992

That is actually a pretty good idea in theory!... So do you turn it off then on around the 110ish mark? Or just leave 5th gear completely out of the game? How does the torque feel after this?

JCON

auto tranny issue was mentioned before I could post it. Video def helped identify it. If your tuner left the tune partially unlocked you should be able to adjust the WOT MPH at which each gear is shifted in to

ward_spratlin

it felt like more like i thought it should feel... you can feel a decrease but its more over time and not just a huge shutoff....and yea i left overdrive completly off

JCON

You should do a dyne run and change your wot shift pouts to match your tq curve

ward_spratlin

my car has been dyno'd tune so im pretty sure my shift points are already modded....cant be for certain on that tho

JCON

They probably took in to consideration that the drag from friction created in that gear at that speed wouldn't be worth it on a 1/4 and that redlining is the faster option. Explains a lot of 5th gear drag cars bogging down.

Nuke

In 5th, the 4.0 doesn't have enough power to overcome drag. Keeping OD off will keep the RPM's up. Even some of the auto GT's have reported similar power fall-offs.

BTW, you might want to watch those runs into triple digits with the 4.0 and a stock DS. The OE DS's are prone to destruction over 115-120 MPH.