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Old 08-16-2012, 08:59 AM   #1
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3.73 gears top end acceleration video 80 mph+

I have a disagreement with another member about the 3.73 gearing and acceleration, so I took a video this morning on flat highway to show a newbie that the gearing isn't sooooo bad. I'm in 5th the whole time. At one point I had to slow to 50 mph for traffic, but with one hand on the phone and the other on the wheel I brought it back up to 80+ pretty quick. Don't try this at home. Your results may vary, amateur driver on open highway...

Equipment: Dakota Digital Signal Interface SPI5 programmed with a GPS. 33x12.5x15 Duratracs, 1998 4.0, 5 speed, 3.73 gearing, cold air intake, throttle body spacer, high flow exhaust, blah, blah, blah…. all those things that don't work...

Link to photobucket… sorry.

Any questions?
IMG_1357.mp4 video by coleypro - Photobucket

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Old 08-16-2012, 03:05 PM   #2
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I am glad to see this. I have the 6spd and will be running 3.73 gears (3.07s now)after my D44 swap.

I know 4.10s or 4.56s would be better but the axle came with 3.73s and I can get a free set for the front.

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Old 08-16-2012, 03:12 PM   #3
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Yep. It's not the best, but it'll do.
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Old 08-16-2012, 03:12 PM   #4
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Im rolling on 31's with a 2 inch lift and my 373s are totally fine for me..plenty quick and I have plenty of power on hills etc...I have no problem thinking they are fine for 33's as well.
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Old 08-16-2012, 06:31 PM   #5
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They'll be great as long as you always go on level ground, down hill, or with the wind...
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Old 08-16-2012, 06:35 PM   #6
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They'll be great as long as you always go on level ground, down hill, or with the wind...
Yeah,dont attempt any hills
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Old 08-16-2012, 06:43 PM   #7
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Yeah,dont attempt any hills
Yep, I'm lucky I go to work and back downhill both ways.

Really guys? Not happy unless you're better?? Seriously, we're all on the same team here aren't we?

You're Jeeps better because it has the optimal gearing… okay you win. I'll run out right now and spend my mortgage on new gears.
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Old 08-16-2012, 06:49 PM   #8
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Yep, I'm lucky I go to work and back downhill both ways.

Really guys? Not happy unless you're better?? Seriously, we're all on the same team here aren't we?

You're Jeeps better because it has the optimal gearing… okay you win. I'll run out right now and spend my mortgage on new gears.
Your funny.
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Old 08-16-2012, 06:51 PM   #9
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Did you change your speedo gear after you got 33" tires? I have 3.73s and 33" tires and when my rpms are @ 2k in 5th my speedo says I'm going around 55-60 mph
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Old 08-16-2012, 06:53 PM   #10
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I don't have a speedo gear. I have the Rugged Ridge SYE which uses a tone ring and an electronic pickup. That's the Dakota Digital Signal Interface SPI5 programmed with a GPS listed above.
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Old 08-16-2012, 06:55 PM   #11
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Your funny.
Thanks!
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Old 08-16-2012, 07:05 PM   #12
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If you're happy with your 3.73 and 33" tires, I am VERY happy for you. And since your disagreement about 3.73 being suitable for 33" tires is apparently for me, I personally believe you have every right to believe 3.73 is fine for your 33" tires. I don't consider it my place to try and convince you that you aren't happy with the combination.

What I will say is that Jeep determined 3.73 wasn't appropriate for even the 31" tires the Rubicon comes with, they went with 4.10 for even 31" tires. So if you want to try to convince people 3.73 is fine for 33" tires, I'll disagree. If you want to tell people YOU are happy with 3.73 and 33" tires, be my guest. I still can't believe you became so obsessive about it that went to the trouble of creating a video in an attempt to prove an individual's opinion wrong.
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Old 08-16-2012, 07:14 PM   #13
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No, I created a video for the OP who borrowed money from his mom to get his Jeep. My point being that regearing wasn't necessary at this time. I said there's other issues for his problems. I was trying to help the kid….. not talk him into something that wouldn't solve his problem. You stated that the only thing to do was regear. Period.

I have said all along that 4.56 is the correct gear…. but 3.73's will take you over 60 mph. If you could remember the original post… that was the issue in question.

I told him through a private message on Sunday that I will make a video for HIM. But showing it to you was just a bonus.

And my Dakota Digital is an SGI-5, sorry for any confusion.
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Old 08-16-2012, 07:29 PM   #14
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...I told him through a private message on Sunday that I will make a video for HIM. But showing it to you was just a bonus.
You already know from a previous post that I have driven literally hundreds of brand-new Wrangler TJs with 33" tires and 3.73 gearing. That was from when I used to build custom Jeeps for new Jeep dealerships who wouldn't pay to have their Jeeps regeared when my guys installed lifts and 33" tires. The Jeeps were driveable but I'd never try to attempt to convince anyone that 3.73 was acceptable for 33" tires. So I hate to disappoint you but I had no need to watch your video. I spent years driving that combination and I know its deficiencies first-hand.
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Old 08-16-2012, 07:53 PM   #15
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I see a few d-bags in this thread. Yep I mean YOU

I have 3.07s, and I can still hit 85 on the highway. Its fun. and easy. I can hold 75 up hill even. Imagine that guys. I can hit 0-60 in about 14 seconds, and can stick with two other tjs, one with 4.10s and one with 4.56s, all on 33s, on the highway at 75-80 mph without falling behind. I can pass people easily.

Sure as hell it would be better with 4.10s in my jeep, but do the 3.07s make it undriveable or un-wheelable? NO. I ran black trails at rausch from crawlers ridge to cemetary, along with plenty of other trails on an extremely basic rig. Trails that most others build similar to me, and ones built better than me in some cases, wouldn't attempt. I had plenty of power and didn't wish for lower gears once.

There will always be an arguement. There shouldn't. There is a factual, mathetmatically and physically ideal gear ratio for a given engine and transmission and tire size. But, does that mean it is the only one that can be used. No. end of story.
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Old 08-16-2012, 08:19 PM   #16
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It's okay Jerry. I know you watched it already.

Hate to tell you this, Jerry Bransford, but it's not about you. I know you might find that hard to believe, but it's about helping a kid getting his Jeep on the road. Isn't that the reason we're here. To help people with their jeeps?

I don't need you to admit you're wrong. The guy who asked got his answer about his gearing..... And not just a copy and paste answer like you tend to give. An actual video that was taken this morning.

And it's really not that troublesome to take a video these days. All you gotta do is push a button on your cell phone.

I'm done. Proved my point and moving on ..... With my 3.73 gears....over 60 mph even.... Go figure???
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Old 08-16-2012, 08:28 PM   #17
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my 4.10s suck with 32's
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Old 08-16-2012, 08:33 PM   #18
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I don't know about the rest of y'all, but I have no desire to do 80mph in my TJ.
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Old 08-16-2012, 08:36 PM   #19
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I don't know about the rest of y'all, but I have no desire to do 80mph in my TJ.
and that was my next point lol.
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Old 08-16-2012, 08:49 PM   #20
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Originally Posted by jeepers29
I don't know about the rest of y'all, but I have no desire to do 80mph in my TJ.
Heck I've never even had mine TO 70, let alone faster. Mostly cruise around 60 or so on the interstate, makes mpgs so much better.
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Old 08-16-2012, 08:52 PM   #21
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Don't think the OPs point was that you should drive 80, but that you could. I haven't seen anyone post anything useful in this thread other than the OP and maybe a hint from Jerry. Only place I drive that fast is on the turnpike on several hour long trips because thats how fast traffic goes.
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Old 08-16-2012, 10:40 PM   #22
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I drive 70 on the freeway my only thing was I knew it should atleast have some pedal in 5th and I don't I appreciate all the input and I'm running some tests in the next day or so I have gone threw my speed days in high school lol 100+ but my TJ Is for my dd and mild toy, I'll save the high speed for my mustang witch is my next buy thanks guys!
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Old 08-16-2012, 10:55 PM   #23
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Quote:
Originally Posted by Jerry Bransford
If you're happy with your 3.73 and 33" tires, I am VERY happy for you. And since your disagreement about 3.73 being suitable for 33" tires is apparently for me, I personally believe you have every right to believe 3.73 is fine for your 33" tires. I don't consider it my place to try and convince you that you aren't happy with the combination.

What I will say is that Jeep determined 3.73 wasn't appropriate for even the 31" tires the Rubicon comes with, they went with 4.10 for even 31" tires. So if you want to try to convince people 3.73 is fine for 33" tires, I'll disagree. If you want to tell people YOU are happy with 3.73 and 33" tires, be my guest. I still can't believe you became so obsessive about it that went to the trouble of creating a video in an attempt to prove an individual's opinion wrong.
I have a guy I talk to today the says he has the same set up as me n his will hit 90+ with ease, he buys n sells all types of wranglers, n he gave me some insite as well as everyone here! I'm doing a test tmro that will give me a big help if he is right i will post what I test and results when I find out.
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Old 08-16-2012, 11:08 PM   #24
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I don't know about the rest of y'all, but I have no desire to do 80mph in my TJ.
Ive done 95 in mine when trying to "race" my girlfriend in her camaro..... I lost... BUT I still hit 95. But I do 80 in mine. Not any different then in most vehicles.
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Old 08-16-2012, 11:11 PM   #25
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Ive done 95 in mine when trying to "race" my girlfriend in her camaro..... I lost... BUT I still hit 95. But I do 80 in mine. Not any different then in most vehicles.
Lol In my ZJ with the 5.2 iv wound the speedo back to 0 lol on i69 against a chevy equinox that was at 115 lol mine stopped at 100 on the dash
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Old 08-16-2012, 11:12 PM   #26
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I have 373 with 33s and it drove fine until I went with the good year wrangler mtrs in 33s so heavy I want to go to 456 now feels like the poor jeep is struggling .
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Old 08-16-2012, 11:14 PM   #27
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I have 373 with 33s and it drove fine until I went with the good year wrangler mtrs in 33s so heavy I want to go to 456 now feels like the poor jeep is struggling .
I'm running BFG A/T
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Old 08-17-2012, 12:12 AM   #28
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I had 33x10.50 BFG ATs for almost 3 years with 3.73 gearing and here are my observations:

City driving went down to about 10 mpg.

The motor lugged in first gear every time I accelerated from a stop.

On the highway in fifth gear I couldn't pass anyone without downshifting and it lugged the motor on steep hills.

It wasn't very fun to drive.

I shouldn't have stepped up to 33s until I re-geared. With 31s it was great.
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Old 08-17-2012, 12:31 AM   #29
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I'm running 33" Duratrac's with 3.73 gears and a 6 speed. I can hit 85 with no problem, even hit 90 once, backed off as it didn't seem to be wise to do that sort of speed on 33" tires. As for hills, not too many around here in South Louisiana, but we have a lot of bridges and I have never had an issue with them.
Even with the 3.73's I can let my Jeep idle up the inclines of the garage at the office in 2nd gear, 2wd.
Could it be better? Sure. But I think I can live with it as it is for a while.

As for the level of D-bags.... yeah, I have noticed it. I have never seen such pissing contest as what I have witnessed since I bought my Jeep. Makes me sick. It feels like you can't read a single thread without someone basically saying "my shit is better than yours" or "what you bought sucks because you didn't pay enough for it"... makes me miss the days of my old VW's, those guys were so much more down to Earth.
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Old 08-17-2012, 11:41 AM   #30
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I think mine lugs because its also automatic with that stupid over kill overdrive jeep put in.

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