Originally Posted by wjfawb0
My truck is an 02 regular cab 4x4 2.7L 5 speed (daily driver). I bought it used a few days ago with 22,313 miles on it. I got my wife in her '00 Celica to give me speed readings over cell phones going down the highway to figure out that when my speedo reads 70mph I'm doing approximately 75mph. The wheels and tires on the truck are P265/70-16 115S on aluminum. The tires are worn considerably further than I would think they should be for the mileage so I am starting to think the previous owner put on the 16s after buying the truck. The incorrect speedometer readings also seem to support this theory(and the truck seems weak compared to other Taco 2.7s with stock wheel/tire combos). I want to keep running ~31" tires, so I suppose I need to drop my gear ratio to 4.10 or 4.56. My door jam says B06A or 8" 3.91 open diff. If I am going to change out my gears I want to look at lockers and limited slip diffs while I'm at it. So, here comes the questions...
From what I have read in the last few days, with my 02 model and its live hub front drivetrain I need to run an electronic locker up front and not an autolocker. I don't want to do a manual hub swab up front mainly because this is a daily driver. For the rear would a limited slip diff. suffice for daily driver duty, or should I go ahead and put a locker in there too so that I can lock both or one of them up when appropriate?
I don't plan on rock crawling or anything, but I would like to have the ability to get out of sticky situations easier by being able to spin all my wheels.
I have been searching for gear and diff. information to see what path I should take, and so far I have had no luck trying to find precisely what I am looking for information-wise. Any thought or direction to tech articles or threads that might be helpful would be appreciated. Thanks,
with tires that are well worn the speedo will be off since the actual tire diameter is quite a bit less than when new
3.91s on an '02/5sp, very interesting. You are the first one I've seen post with a newer than '00 that didn't have 4.30s with that combo. It seems that the reg cabs got the short stick on this one.
more trivia to add to my collection...
for what you describe I would go with the rear ARB (RD-89) and a Truetrac up front (LSD, pt #911A342). I ran this combo for about 2yrs and it was great for everything but the wilder rock crawling (why I swapped out to the front ARB).
Handling in snow, mud, etc was just as good as me current ARB.
If you don't plan on going larger than 31s or 32s then stick with 4.30 gears. The problem, however, is that this ratio is a dealer only item; no aftermarket mfgs have them. 4.56s will be fine with 32" tires however but you'll need a 2" lift.
So, for a DD that occasionally wheels I'd recommend the OME complete suspension kit with 881 coils (just under $1k + install) for 100% better ride/handling and they will settle out to around 2" of lift on your truck. Then add the gears/locker/LSD and some 32s and rock sliders and you'll be ready to tackle most trails with relative ease.
this won't be cheap but you'll be very pleased with it.