2004 TJ with 4” lift and 33’s, 4.0 and 5 speed manual. Looking at a gear swap, I know the majority go with 456, but how would 488 be with 33’s?
Also, it’s not a daily driver and it never sees the highway or speeds above 60 mph.2004 TJ with 4” lift and 33’s, 4.0 and 5 speed manual. Looking at a gear swap, I know the majority go with 456, but how would 488 be with 33’s?
You probably could get away with 5.13s or even 5.38 if it never sees above 60.Also, it’s not a daily driver and it never sees the highway or speeds above 60 mph.
Check out his second post.Same year, motor, trans as you.
4.56 is what you want. I drove around for a few months with 4.88 and 33”s until I could buy 35”s. It was great off road. But highway the rpms were to high.
Also, it’s not a daily driver and it never sees the highway or speeds above 60 mph.
Because of the overdrive in your auto. There are shifting barriers. I am not fully versed in the auto. But i have never seen anyone say use 4.56 in an auto with overdrive.I have a rubi with an automatic. In overdrive with 33s my 4.10 is giving me about 1850 rpm at actual 60 mph. I am guessing 4.56 would bring that up to around 2200 or so. Anyone have some real numbers
Because of the overdrive in your auto. There are shifting barriers. I am not fully versed in the auto. But i have never seen anyone say use 4.56 in an
The auto works great with the 4.10 until that .69 od comes in. It does alot of highway driving. It will be 4.56 or 31 inch tires.Because of the overdrive in your auto. There are shifting barriers. I am not fully versed in the auto. But i have never seen anyone say use 4.56 in an auto with overdrive.
It will be great. My daily driver is geared to 4.88. 75mph = 3000 rpm2004 TJ with 4” lift and 33’s, 4.0 and 5 speed manual. Looking at a gear swap, I know the majority go with 456, but how would 488 be with 33’s?
I'd only consider 4.88 for 33's if your Jeep seldom sees the highway. Even offroad 4.56 is more than enough for 33's considering most offroading is done with the transfer case in 4Lo. Only if you think you may eventually go to 35" tires would I go 4.88 with your 5-speed manual transmission and 4.0L engine.2004 TJ with 4” lift and 33’s, 4.0 and 5 speed manual. Looking at a gear swap, I know the majority go with 456, but how would 488 be with 33’s?
Ron your 4-speed automatic changes the usual recommendation for an axle ratio, due to its exceptionally steep .69 Overdrive ratio. At a MINIMUM for your 33" tires you need 4.88 but personally I'd go 5.13. Yes 4.56 is perfect for 33's with a 5-speed manual but don't pay any attention to recommendations made for those with manual transmissions.I have a rubi with an automatic. In overdrive with 33s my 4.10 is giving me about 1850 rpm at actual 60 mph. I am guessing 4.56 would bring that up to around 2200 or so. Anyone have some real numbers
A concern I have, that hasn't been voiced, is pinion size. I know with the 30 front axle and 4.88 gears the pinion diameter is extremely small.
Good to know, thanks. Years ago when I had my 97 I was advised against anything lower than 4.56 in my Dana 30 by a reputable drive line shop...People run 5.13 gears in the Dana 30. As long as you buy quality and not eBay special $50 gear sets. You don’t have much to worry about.