Have some diff questions...

A

airdreams1

New member
what I have: 89 T4R with 31" tires stock 4.10 gearing (G/29 2).... & Im going to keep it...
Also have a 93 second gen T4R with 4.30 gears (G/28 4)...... Going to sell it.

would it be worth\ the time & work to swap to the 4.30 gears/diff?

I realize 4.56 is the recommended gearing to get back to stock ish preformance. But I just dont have the $$$ to buy new gears.


If its worth doing, any advice to make it as quick & painless as possible?
 
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Not worth it. You won't feel any difference if at all. Add to the fact of pulling and installing 4 diffs, 2 of them IFS, no thank you.
 
I agree with Crash, not enough difference in those two gearsets.

If you're gonna go with 31's, I'd say 4.56 would be a perfect choice, but if you ever plan on going larger, 32's or 33's, at least 4.88 would be the better choice.

With 4.88's (OEM 4.10's), 22RE, 5 speed manual and 33's, the speedo is spot on at 70mph. It also has plenty enough torque to pull that size of tire down the road all day long. If you have a 3VZE and/or auto trans, you'll need to look up what others are running.

Oh yeah, forgot to add, 4.88's and 31's are okay too, you'll have a lot of torque, but it falls off around 65mph, IIRC, with my 31" street tires, I'm around 3500rpm around 65mph, a bit high for my liking if I'm on the interstate for long periods of time.
 
May put on the OME springs & balljoint spacers, but I dont plan to run any bigger than 31's... I do have the 3.0 V6 & I do mostly on-road driving.

acording to the odomiter My 89 (410 gears) has a brand new motor with 3600 miles on it & only gets between 180 & 200 miles per tank if I drive like a grandpa Nothing over 3500 rpm.
The 93 is getting 230 miles per tank. Thats 30+ miles per tank more with a worn out motor that has 250,000 miles on it. (Both have the large 18 ish gallon tank in them & both have manual trans.....)

specs I found say the 93 should get slightly less mpg than the 89:
89 = 15 city / 16 combined / 18 highway
93 = 13 city / 14 combined / 17 highway

So I figure ist the gearing making the difference???
 
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if I buy the gears..... is it doable @ home or do I have to have a shop do them?

gears should get me better MPG.. but will it help fix the speedo/odometer?
 
Personally, I wouldn't try to set up my own gears, I've seen it done a few times before and they take a little bit of knowhow to get the correct pattern, as well as a lot of different-sized shims, but think its best to have someone who knows how to set them up correctly.

As for correcting the speedo, just call either of the two links below, tell them your setup (trans, gearset, tire size, SR5 or not, etc.) and they can tell you which cable gear you need, as well as tell you whether they have one in stock or not.

The 4runner House

Yota Yard - Intro
 
thanks... Ill will definitely get ahold of them.

But got to figure out the gearing thing as well... the 89 almost dies off the line the raps out extremely quickly. (the 93 doesn't. & both have exactly the same timing setting) & the 89 has to down shift on hills that the 93 doesn't.
 
Lift the rear end off the ground, then spin the drive shaft and count how many turns before the wheels make one full 360º revolution. It helps to either put masking tape or chalk marks on both the wheels and the drive shaft.

However many turns you get out of the shaft is what your gear ratio is. Unless you bought it new and never did gears, I'd recommend doing this to make sure its the stock gear set and wasn't changed out by someone.

You'll have to guess at the last partial turn, but 4.10 should be really close to 4 full turns! 4.56 will be about half a turn, 4.88 will be shy of 5 turns, etc.

Compare it to the other vehicle you have, and also note what rpms you're at when at exactly 55 or 65 or 70mph, I bet the two are quite different. Your higher ratio rear will be higher in rpms.
 
@ 65 (on the speedo) the 93 is doing just over 3000 rpm

@ 70 (on the speedo) the 89 is doing aprox 2600 rpm

I intend to make a video so I can get a better idea of how each is doing through the gears, rpm & speed wise. (just got to fix the 89 again.:()
 
airdreams1 said:
@ 65 (on the speedo) the 93 is doing just over 3000 rpm

@ 70 (on the speedo) the 89 is doing aprox 2600 rpm

I intend to make a video so I can get a better idea of how each is doing through the gears, rpm & speed wise. (just got to fix the 89 again.:()
Click to expand...


WHOA!!!! That's really low rpm on the '89 if you're doing 70mph! I don't recall what mine is at when doing 70, but I'm sure its probably closer to around 3200rpm.

Your '93 sounds like its about right though.
 
airdreams1 said:
if I buy the gears..... is it doable @ home or do I have to have a shop do them?
Click to expand...

gear set up is kind of an art form. I know guys that say they can do it but seeing them do a differential set up I think they have just gotten lucky the thirds haven't grenaded themselves yet. I tried it once myself and it took forever to get a good pattern.

Check out Zuk's site Toyota Gear Installs
Ken specializes in Toyota gear set up, it takes a few specialized tools.
 
there is a local guy/shop that quoted me $75 per diff if I pull & re-install them. does that sound reasonable?

or $350 if they do all the work... (but thats out of my price range)
 
they are a small family owned off-road shop that a lot of local guys use. They do everything from mechanic, to fab work & even have there own Rock Crawler that they use in some large events. Peronaly have never used them...


That said, Now I have to really think.

Option 1: wait & save up to buy fully built TG fiffs, its going to be several years before I can afford to do the gearing. (Im on a fixed income & coming up with 2K + is not an easy task.)

option 2: I have enough $$$ to get the gears. but would need to save the $$$ to have the local shop install them (& hope they really do know what they are doing)

option 3: forget about gears (ie: better performance/mpg) & just drive it the way it is.
 
It is a hard choice to make, but from my experience with rushing things it never turns out well. I learned a long time ago to save and do it right.
You could also keep an eye out on craigslist for either a axle that already has The gear ratio you want or a used axle from someone else's project. Assuming for you it would be easier to swap an entire axle then to gut one
 
I could swap out the axles.... finding them that the hard part... toyotas are far & few between here. There isn't a huge Toyota following here. & Being in the high desert, things don't rust away like in other arias, so people don't get rid of there project toyotas. & when they do, they usually go to guys in arias where they will rust away...
 
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