Without hearing your Jeep it's hard to say if something is wrong with it or not. You should also fill out your profile or tell people what engine you have so it eliminates that question. 2500 is no where near red line on wither engine. the 4.0 is more than capable of running 3000 without issue and then some. As long as your engine is in good mechanical condition you should have no issues running it up against the rev limiter for short periods of time.
Ahh gotcha okay, thanks!! Yeah the TJ I’m getting has the manual 4.0 5 speed, I believe it has the NV3550 transmission. Oh and 37’s. From all I’ve found in these threads it seems that the current setup it has is in the okay zone, maybe it’d be better off with 5.13’s or 5.38’s but it will be a dd as well as trail rig so ill have to wait and see lol
Honestly, I probably won’t go down to 35’s unless these prove to be unbearable, with long distance plans of 1-tons and 40’s. So as long as the Dana 44 axles live I’ll most likely run 37’s. With that said, I know a proper gear install is pricy(1-2k parts and labor) so I probably won’t do that for a while. How will the RPMs be with the 4.88’s? My previous 4.0 manual tj had 35’s and stock gears in a sport(3.73 I believe) so 4th and 5th were unusable. As long as it’s better than that I can deal with it for a while lol
I don’t think it would be nearly as bad as 3.73, 5 speed, and 35s, but you’ll still likely be using 4th gear more than 5th on the freeway.
Wouldn't it be better to measure from the ground to the center of the wheel then multiply times 2?
It is. But very few are willing to do that.Wouldn't it be better to measure from the ground to the center of the wheel then multiply times 2?
Just sayin'
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If you re-gear without changing tire size, yes definitely. If you re-gear to accommodate a specific tire size it may be close to accurate, but not necessarily exact.Hello guys, dumb question about re-gearing, if i do that, will my MPH become wrong? how does the TJ measure Velocity? thanks in advance
Interesting, i just bought a TJ 98 4.0L 5 Speed manual with already 32'' tires but it has a problem in the dana 35, the speedometer was veryclose to the GPS MPH so I guess it was correctly re geared It seems to me the ring gear is broken if so ill have to change it, and was thinking about returning to the stock gear and change the tires
It's entirely possible that someone just changed out the speedometer gear to correct the speedometer.
Ya man thats what I am thinking also. By your pro-pic, it looks like you know your way around some mountains and snow. I also called Mr. Blaine (black magic brakes) and he said the same thing. I have been buying brakes and taking that guys advice for a lot of years. Thank you for your advice, much appreciated.
That's great, thanks. So do the spider gears from the existing differential get refitted into the new carrier or do they need replacing as well?
I wanna say they will get moved to the new carrier but to be honest i'm not sure on that one. I've never heard of people having to change or swap their spider gears because of carrier fitment.