3.73 with 33's.. what to expect
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3.73 with 33's.. what to expect
I've been searching the forums here for awhile now, and have searched up some pretty good information about gearing with different set ups. I just want some personal input on what 33's will be like with factory 3.73 gears. Here is what i have.. 99 4x4 XLT with automatic transmission, factory 3.73 8.8 L/S differential. It's basically a stock 4x4 Ranger for now but my plans were to Superlift it with 33's, I'm about all ready to buy the lift kit and wheels/tires. I already know the 33's will bog the 3.73's some, but exactly how bad? and is it okay to run this set up, honestly? I'd appreciate whatever information you guys have.. Thank you
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I should have mentioned in the first post, and I'd like to add.. that my truck won't be used much for wheelin' or offroad use. It's just a driver, not my daily driver but will see mostly the road. I hoped mine had the stock 4.10's in it but when i crawled under my truck to check the tag unfortunetly found out that it didn't have 4.10's.. let me know what you guys think
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From: locust grove georgia
you aint gonna see a big difference. i have the same engine, 31s and steel wheels with 3.55 gear and im really not complainin. didnt loose too much power at all. although when i do upgrade to 33s ill be going to a 4.10 or 4.30 gear.
This is good to know I should check for this myself, But Ya I have pretty much the same setup as you 33s and a 3" body lift, except mine is 3.73 open diff. Its not to bad but it gets annoying after awhile, You definitely can tell the engine has to work harder to get up to speed, and highway driving stinks with this setup IMO going up any slopes is not fun. but around town its fine. I'm getting ready to regear to 4.10 L/S, which should pretty much bring me back to a stock feel, and the L/S will be nice. I can't wait!
If your setup were to work your engine significantly harder, which I seriously doubt it will, I expect the load to take itself out on the transmission, overheating it and increasing wear. The transmission cooler will help keep the temperatures down when you run extra power through the transmission (i.e. towing).
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From: Hartford, WI
I have a '98 4.0l 33'' tires 3.73 open diff and I personally think 4.10s would be better but entirely its not that bad. hums at about 2800 rpms on the freeway doing 70 which isnt bad, usually has to upshift 2 gears if your going up a decent hill though....but hell we dont have 350's in our trucks! What do you expect!
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From: kansas city, mo
I have 265/75/16 (32") destination mt's on mine with 2" shackles and keys turned up, 3.73 open and I do about 2000 @ 70ish, and about 2500 around 75ish. according to a gearing and tire height calculator if I go up to a 4.56 on the highway it will boost my rpm by about 500, as if i were doing 75 with a 3.73.
To be honest I like the way my truck runs at 75 better than 70, because it has enough hp and torque at 75 to hold the OD nice and solid, where at 70 its drop out of it on every moderate hill. So if you have an auto-OD even a 4.56 should be more than livable on the highway.
Now when it jumps out of OD, or around town, the numbers say it will be a little more radical. I know with a 3.73 out of OD at 70, it jumps up to between 2800 and 2900, and the calculator says with a 4.56 that will go all the way up to 3440, which on the throttle I'm sure would be around 3500ish.
It might suck some more gas and be a touch less conservative, but nothing that I would call radical, considering fx4's have an inch shorter tire than I do with a 4.10 ratio stock!
A 4.56 gearing on 33's would be only slightly quicker and revier than a stock fx4. I know if I'm going to spend a grand or whatever it runs nowdays to change out my gearing, I wouldn't waste my time doing a 4.10 on 33's which is still a taller gearing than the shortest stock offering, the fx4. A couple miles per gallon and a few more rpm is a small price to pay for the kickass acceleration and easier load on your tranny.
just my 2 cents,
Brett
To be honest I like the way my truck runs at 75 better than 70, because it has enough hp and torque at 75 to hold the OD nice and solid, where at 70 its drop out of it on every moderate hill. So if you have an auto-OD even a 4.56 should be more than livable on the highway.
Now when it jumps out of OD, or around town, the numbers say it will be a little more radical. I know with a 3.73 out of OD at 70, it jumps up to between 2800 and 2900, and the calculator says with a 4.56 that will go all the way up to 3440, which on the throttle I'm sure would be around 3500ish.
It might suck some more gas and be a touch less conservative, but nothing that I would call radical, considering fx4's have an inch shorter tire than I do with a 4.10 ratio stock!
A 4.56 gearing on 33's would be only slightly quicker and revier than a stock fx4. I know if I'm going to spend a grand or whatever it runs nowdays to change out my gearing, I wouldn't waste my time doing a 4.10 on 33's which is still a taller gearing than the shortest stock offering, the fx4. A couple miles per gallon and a few more rpm is a small price to pay for the kickass acceleration and easier load on your tranny.
just my 2 cents,
Brett
