05 Prerunner what should I use 4.10 4.56 4.88 gears

Hello Taco owners,


Because I'm new to this forum, I'll like to receive some knowledgeable advice from you guys that may already ran through what I'm experience far as my rear differential re-gearing is concern. Basicly, what I've going on is that I own a 05 Taco Prerunner with the 4.0 engine. Currently she is seating on 35'' with 6'' Pro Com lift. It was obvious that since I'd installed the lift kit and the tires, I've noticed that my truck gotten a significant drop in RPM's and power (Transmission is still working as it supposed to ) but the loss of power and drag in my drive line is highly noticeable. To resolve this concern, I've came up with the idea of re configuring my rear end from OEM Specs to something higher. Now, I do know that this particular model came from factory with the E-lockers 3:83 gear ratio configuration, but I'll need some of your experience in order for me to upgrade and select the best gear ratio upgrade. My end goals is to maintain my engine to OEM rpm's range and my transmission safe from being overload. Pretty much highway driving. Which gear combination should I used ?

 

4:56 will put you back to stock. 4:88 will be a little lower, but you will have faster acceleration at the cost of highway mpg. Talk to ECGS for a third. Seems crazy but they beat everyone on price (even shipped from the east coast) and they have a great warranty. They ship you a complete third in a bucket and you send them back your stock third. They are the best in the business. http://eastcoastgearsupply.com/i-131078-8-tacoma-fj-cruiser-4runner-e-locker-3rd.html

 

What he said.

 

Thanks username, your advice is highly appreciated. I'll go ahead and place an order from ECGS for a whole third assembly. It seems fairly simple, (Knock on wood) to replace just the third assembly in oppose to replacing the Ring and Pinion W/ Master Kit. Thanks again

 

It's not lieutenant proof, but it's pretty easy. Jack it up, put jackstands under the axle, then remove four nuts per side and slide the axles out a few inches. Pop the third out and install the new one...done. You are supposed to remove the brake lines but I never do. Be careful not to lay the axles on the seals in the end of the axle housings, they are easy to fuck up.

 

Well if a Lt can do it, whom doesn't ? Lol anyways, so ya, I'd founded a member here and he posted his thread explaining step by step (With pics) the entire process. Which is to me, perhaps relatively simple. Now Username, I'd have this tech question in regards to my transmission that I would like to obtain your opinion before we close. Considering that this truck is equip with an Auto Tranny, could it be that because of the load of my tires and the lift, be one of the contributor factors that during the truck's automatic shift from 2nd to 3rd at verry low throttle take off, be that the tranny ought to vibrate (Like if when you are in the highway and you slide over to where "The wakeup speed bumps" are ) causing it to feel just like it during those two shifting gears. It doesn't happen when you had gave it little more throttle. Its weird tho, I thought may be because of the heavy load on the drive line, is not allowing the the tranny to shift right. Any Thoughts ?

 

I did start getting more drive line vibrations when I switched to a heavier tire. I am curious If they go away when its time to replace my tires with a more highway friendly set.

 

So I took my Taco for I drive today and I emphasized more closely on the symptom. Come to find out that it only happens not on 2nd to 3rd gear but it only does it on 5th@1400-1500rmp running below 45mph cruising. So long as she wont drop below 1500 rpm in 5th gear, she is fine. My concern was may be the tranny, so i went go ahead and down shifted to 4th and drove it again and tried to maintained 1200-1500 rpm cruising @40-45 and the symptom completely vanished. Can it be the such load on the tires and that when I'm in 5th gear @ low rpm and speed, causing the transmission to be overload ? Can this problem be resolve when I install the 4.56 third assy. Any thoughts will help

 

QUESTION! do you guys recommend 4WheelParts as the best option to regear or are there better places to go? 4WP quoted me for a good 1K.

 

ECGS is the place to go man... I was astonish with prices and technical help that those guys provided me. Prices are far the best.

 

Vibrations are hard to diagnose over the interweb. Could be your tires are not balanced. Could be a worn carrier bearing or u joint. Chances are regearing will not fix it. It's a truck, not a Cadillac.

 

this should help