I spoke with a major gear manufacturer today about the possibility of building new gear sets for our trucks (4:10 and 4:88 gears) for the rear and front diffs. Im sure these would be able to combine wit hhe true-track and proved much improved performance/reliability. This is not just a hype thing and these guys want to just see if people on the boards would be interested (i know the answer but need to post this anyway). I cannot disclose the gear maker but they are a very large company and easily has the ability to build these gear sets. Feel free to post comments here. Thanks...greg
New Gears For Titan??
PrerunnerGreg
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Stock gears are 3.36:1 and stock tire size is roughly 33". If you went to a 35" tire, you effectively lowered your gear ratio by (1-33"/35") x 100%=5.7%. To return to stock you need to lower the ratio by the same percentage: 3.36 x 1.057=3.55. So a 3.55:1 ratio gets you to stock. I like to go a bit lower, that's why I recommend 3.73's.TitanicDJ said:
4.88's are way to low for a street rig.
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I'd want a set too. I think the truck is undergeared (3.357) for the stock 33". Our trucks are geared to do 200+mph at redline in 5th. With 4.88 our trucks would cruise around at 2800mph at 70mph. At 70mph most of our engine's work is going into fighting to the wind. I doubt it if I see a minor if any drop in mpg. That's just my opinion though 
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This is exactly the kind of feedback that is needed. I aggree about the 3.73 and 4.10 bing the ratios to start with. My 4.10 with 37's is jsut about perfect, so 3.73 on 35's would be great. And the gears really, really wake-up the acceleration. I will post more as this develops.
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3.73 for me...already have the truetrac in the rear...3.73's and a truetrac up front would give me the confidence to pin the throttle while 4 wheeling and not worry as much about grenading my front dif......
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And a LSD up front? No thanks, IIRC the Titan doesn't have a center axle disconnect on the front end like many older trucks.
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Guys what do they mean then that our gears in the big tow are equivalent to 4:10's?? What do we with BT really have? and what of a difference will there be going to ACTUAL 4:10's? We will waste even crazier amounts of gas right? I dont care too much bout the gas since the most I get already is bout 12mpg but would still like to know... How much roughly would these gears cost as well?
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Like Kartman said, the difference is in the transmission gearing. So Nissan had to press the fact that final drive ratio is about the same as the final drive ratio of the domestics with 4.10 gears. Just work off the stock Nissan gear ratios and ignore the whole "similar to 4.10" thing.
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I really don't know much bout gearing, but I have this question for you gear gurus.. If I have the 2.94 now which is equivlant to the 3.73 and i want to have the bigtow gear which is the 3.36 which performs like a 4.10 if i get the 4.10 gear will it perform like a 5.20? i dunno i just know i dont want anything higher than the "stock " big tow gearing, just want more acceleration off the line at the track.
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What size tire are you running? 3.73's with 35" tires will have slightly lower gearing than the Big Tows 3.36:1 gearset. If you're running 33" tires, 3.73's will be even lower, probably equivalent to something like a 4.56 (I didn't do the math-I haven't had my coffee yetToomnymods said:
).
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i thought 3.73 was higher than the 3.36? the number is higher why wouldnt it be a higher gear? im confused..
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It's a ratio, from pinion to ring gear. For example with a 3.73 gear; for every 3.73 rotations (revolutions) of the pinion, the ring will turn 1 time. So to break it down even simpler, for every 3.73 revs of the drive shaft, the tires will turn 1 rev.Toomnymods said:
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id be down for the 3.73 or 4.10 as long as the ecu isnt an issue! my wallet is already open! changing the gears in my old z28 was the best mod i ever did.... i have been waiting for these to come out for the titan... so dont be a TEASE please
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