t-case or axle gearing?

[bschroeder]

i think that this is the right forum for this post if not please let me know. i woulf like to get a little in put on a decision i am having some troubles on. i own an 88 yota and i have the 4.7 gears in the t case and then the stock 4.10 gears in the axles. this truck is my daily driver. if you were going to go lower gears would you do the dual t cases or woud you do 5.29's in the axles? any help would be appreciated. i am just deciding which would benefit me the most.

 

[Twisted]

IMO. Daily driver, keep the 4.10 axle gears & double up the tcase. Keep your highway driveability & give yourself better gearing for offroad. Unless you plan to put on big tires that may eat up your power.

 

[Greg]

Tire size makes all the difference with a Toyota, what size tires are you running? Are you eventually increase the tire size? Driving with stock 4.10's with bigger tires, even on 33's, is miserable. The standard combo is 5.29's for 35's.

 

[bschroeder]

i'm currently running 35's and plan to stay the same size. 65 on the highway doesn't happen except for down parley's. is 5.29,s to low for a daily driver though?

 

[Arm&Leg Yotas]

The 529's pretty much just return the power your tires took away. If it was a dd I would do 529 for sure. A serious crawler you could do lower tcase options and leave the 410 for strength.

 

[Spork]

Regear the axles. You probably don't ever use 5th gear. The gearing will help offroad also.

 

[Rot Box]

5.29's will benifit you TONS more. I'd go 5.71's (although there are mixed emotions about their strength...:-\) if it were my truck.

You will really enjoy having all that power back and being able to drive up the canyon in a higher gear than third is awesome too! Typically EFI, 5.29's and 4.7's are all you'll ever need on most trails expecially if it doubles as a daily driver. Just remember to buy a quality gear brand like Yukon or Precision ect

 

[Twisted]

i'm currently running 35's and plan to stay the same size. 65 on the highway doesn't happen except for down parley's. is 5.29,s to low for a daily driver though?

Guess I shoulda gotten the tire size thing, before I gave MO. Do the axles..........and then do the double case!

 

[Greg]

i'm currently running 35's and plan to stay the same size. 65 on the highway doesn't happen except for down parley's. is 5.29,s to low for a daily driver though?

Your gearing is way off with 35's and stock 4.10's. Swap in 5.29's, that will put your gearing back to where it was with stock size tires an 4.10's. Your offroad gearing will improve quite a bit too. With the 4.7's in your t-case and 5.29's, you will be geared quite well for trail use.

 

[billylight]

ive run 33s and 5.29s and it worked well. with a 4 cylinder the lower the axle gear the better. ive had 5.71 and love them even more (nothing like running up parleys at 60mph with 37s) but changed back to a quality 5.29 for strength. with the lower axle gear it takes a lot of stress off your drive shafts, transfer case. the right gearing is always the most important upgrade when tire size has been changed

 

[NOTATOY]

we are running 5.29's and 38's with no problem doing 75 on the freeway. Dual cases and 4.7's in the rear case gives you awesome selection of gearing. Duals though can be a little obnoxious on the freeway, they like to whine a bit.

 

[Noahfecks]

If your not going to run bigger than 35" tires you dont need 5:29's. Regear the axles to 4:88, and when you get more $$$ do a doubler and get an output shaft from Bobby Long.

 

[billylight]

If your not going to run bigger than 35" tires you dont need 5:29's. Regear the axles to 4:88, and when you get more $$$ do a doubler and get an output shaft from Bobby Long.

i've run 35s and 4.88s and if there is any kind of weight in the truck you are not going to be using 5th very often. 4.88s and 35s are about the prefect ratio to return you to stock but the added weight from big tires make it not balance out. the lower the better.

 

[I Lean]

i've run 35s and 4.88s and if there is any kind of weight in the truck you are not going to be using 5th very often. 4.88s and 35s are about the prefect ratio to return you to stock but the added weight from big tires make it not balance out. the lower the better.

Yep.

I had 32's sapping my power, so I had my gears changed to 4.88. I regretted it from day 1.

On a 4cyl Toy, there's no reason not to jump to 5.29.

 

[billylight]

Yep.

I had 32's sapping my power, so I had my gears changed to 4.88. I regretted it from day 1.

On a 4cyl Toy, there's no reason not to jump to 5.29.

amen!

 

[Noahfecks]

Well opinions are like.....and mine is no different

If you cant run in any gear with 35's and 4:88's then you have some other issue (motor). 4:88's are considerably stronger than 5:29's and you definatly dont need 5:71, everyone I have ever known stips these gears out within a few runs. Also the lower gear you put in the thirds the more stress you are putting on your t-case output shaft, a single t-case with 4.7-1 and 5:29's screams broken output shaft, not a fun trail repair.

Might consider finding a couple spare thirds (mabey $35 a piece) and building them with your 5:29's and lockers. Then save up for the doubler and output shaft. When all the parts are ready do the whole thing right all at once.

Still say if your only going to make one mod, go to 4:88's and get your motor running right.

 

[I Lean]

Also the lower gear you put in the thirds the more stress you are putting on your t-case output shaft, a single t-case with 4.7-1 and 5:29's screams broken output shaft, not a fun trail repair.

Almost, just backward---the lower the axle gears, the LESS stress there is on the Tcase output. (for a given torque application to the wheel)

 

[billylight]

Almost, just backward---the lower the axle gears, the LESS stress there is on the Tcase output. (for a given torque application to the wheel)

im with you! the further down the drive train you lower your gears the less stress each peice in front of it has. if we ran portals with another reduction on them it would take the stress off the axles shafts forward. but in normal applications the axles get all the force of the big tires on one side and torque from low gears ahead of them.

i guess the 6 toyotas out of the 15 4 wheel drives ive owned in the past 12 years only forums an opinion?

 

[O'neal]

My old runner I run 37"mtr's,twin sticked dual cases and welded 4:10 third's.I could run down the highway fairly well,3-4th gear but never,ever 5th.You should be able to run 35's with 4:88's with a good running engine easily.If you need to haul extra weight or whatever run the 5:29's.

 

[bschroeder]

sweet thanks everyone for your in put i appreciate it.