I did a search, but just didn't see any threads that really seemed to match my issue.
A while back I swapped a ford 8.8 in for the rear axle with a yukon grizzly locker. At the same time i re-geared to 4.88s and upgraded to 35s. I have the 4.0L and the 32RH. My issue is that when I accelerate, 90% of the time, it's horribly, horrendously slow. It's almost too slow to be safe to turn onto a moderately busy highway because I have a 0-60 time of greater 20 seconds. The other 10% of the time it accelerates well within my realm of expectation and I have no issues merging even onto a fast moving and crowded interstate. Accelerating from a stop frequently produces reasonable acceleration times, but accelerating from any speed over 5-10mph is unbelievably slow. Even if I put the pedal in the floor and force it to shift into 2nd it makes zero difference in my acceleration when this happens. It's like the engine is doing the work, but the power it's making isn't making it out of the engine.
The best way I can describe it is that 90% of the time when i accelerate, it feels like I'm trying to haul a 2000lb trailer and the other 10% of the time feels like i'm being pulled up to speed by my Ram 1500. If it were consistent one way or another I wouldn't bother posting, but i'm kinda stumped as it is.
I understand that my gears are a little steep for 35s and the 32RH, in hindsight i would have done 4.56s instead, but I refuse to believe it is causing inconsistent results like this.
As a side note, the PO's mechanic apparently decided to use stop leak or mix antifreeze at some point (i got the jeep at 30K miles) and it gunked up the head and caused an overheat. I had the head decked and cleaned when this happened at about 60K miles and i'm only at 75K now. Could my acceleration issue be some result of the overheating that happened?
I know this is a long post, so thanks to everyone who reads it all and has any ideas.
A while back I swapped a ford 8.8 in for the rear axle with a yukon grizzly locker. At the same time i re-geared to 4.88s and upgraded to 35s. I have the 4.0L and the 32RH. My issue is that when I accelerate, 90% of the time, it's horribly, horrendously slow. It's almost too slow to be safe to turn onto a moderately busy highway because I have a 0-60 time of greater 20 seconds. The other 10% of the time it accelerates well within my realm of expectation and I have no issues merging even onto a fast moving and crowded interstate. Accelerating from a stop frequently produces reasonable acceleration times, but accelerating from any speed over 5-10mph is unbelievably slow. Even if I put the pedal in the floor and force it to shift into 2nd it makes zero difference in my acceleration when this happens. It's like the engine is doing the work, but the power it's making isn't making it out of the engine.
The best way I can describe it is that 90% of the time when i accelerate, it feels like I'm trying to haul a 2000lb trailer and the other 10% of the time feels like i'm being pulled up to speed by my Ram 1500. If it were consistent one way or another I wouldn't bother posting, but i'm kinda stumped as it is.
I understand that my gears are a little steep for 35s and the 32RH, in hindsight i would have done 4.56s instead, but I refuse to believe it is causing inconsistent results like this.
As a side note, the PO's mechanic apparently decided to use stop leak or mix antifreeze at some point (i got the jeep at 30K miles) and it gunked up the head and caused an overheat. I had the head decked and cleaned when this happened at about 60K miles and i'm only at 75K now. Could my acceleration issue be some result of the overheating that happened?
I know this is a long post, so thanks to everyone who reads it all and has any ideas.
