looking to get the 315/75 MTRs?? Will it stress the truck with the stock gearing?

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So basically i dont plan on changing the gearing, i was just curious if it will put to much wear on the tranny and the wheel hubs from the extra weight? Thanks so much for your comments.



Evan
93 crusier OME locked
285 BFG A/T
 
Additional wear?...yes, too much?...no It will be more sluggish however.
 
Oh, the insanity. Yes, it's too much and everyone that does that is killing their trucks. Sorry for the sarcasm NY, but seriously dude, read some of the old posts. You are asking things that have previously been answered and it's rather rude to keep asking knowledgeable folks to retype their answer just because you don't want to look it up.

That's my subtle way of requesting you to search. :D

Oh, welcome to the forum. :flipoff2:

fwiw, with 35's, if using them for dd, you'll want to regear anyway. :D
 
Currently, two threads down "cruisin" has asked the same question.

Please reefer there.
 
so if i get the 315 i should regear hunh???

if i do how much should it cost and is any mechanic qualified to do this??


Also how much does the 4.88 gears cost???
 
Gear sets typically run $250-$300 an axle, and labor is about the same per axle.

Yes, there are mechanics qualified to perform gear swaps. Research and choose carefully.

Also, for a daily driver you'd probably prefer 4.56 gears over 4.88.

Are you going to wheel this thing? If not, stick with the 33" tires (305/70/16).

Nay
 
Hell -- if you're not going to wheel the thing, get the 285/75/16s -- you'll save almost $20 per tire. Then either leave your gearing alone or get the 4.56.

If you are going to wheel it, get the 315/75/16 and upgrade to 4.88 and wheel the snot out of it.
Once you've hit this point your concerns do not lie necessarily with the transmission, but with the birfields.
 
NY cruiser said:
if i do how much should it cost and is any mechanic qualified to do this??


Also how much does the 4.88 gears cost???

Costs vary, but the key is doing your own teardown and install. Pulling the axles, and pulling the diffs is messy and time consuming but basically easy. Therefore, it's a good place to save 4-5 hours of shop time and $500.

My rough costs:
4.88 gearsets from Precision gear approx $200 each
New bearing kits for differentials (highly reccomended and buy from Toyota) $150 each
Differential set up $150 each

Total roughly $1000 doing the remove and install of the thirds myself.

Not every mechanic can set up differentials. I would go to a differential shop, not a regular shop for this. Ask the Toyota mini-truck guys in your area who the go-to "gearman" is in your area. Setting up gears is fairly specialized service, and you want someone familiar with Toyota's drop out style third members. I assume you are in New York-which is close to New Jersey where Junk lives, so you might ask him, though advice from Junk needs to be taken with a (theme park) mountain of salt.
 
You will lose a ton of power with 35's. Infact you might not even be able to drive it. I normally have to shift into low-range to get the vehicle moving, then once I'm topping 2.45mph, I quickly shift into high-range. Sometimes my acceleration efforts are stopped by a small speed-bump, or a gentle head-wind, but normally within a few hours I can get my vehicle up to about the speed of a old woman's walker, however if my gastank is full then about 1.75mph is all I can achieve with my stock gearing. I was once rearended by a large semi-truck, pushing me up to about 3.57mph, I had two axles rip completely off from the force of 35" tires spinning at those insane speeds!

Oh and welcome to the forum! :flipoff2:

Ok a bit harsh, but just drive the thing and see for yourself, I have 35's and stock gearing, have for 3-years.
 
Mark don't forget altitude

Mark,

Part of your problem might be altitude. I've had my 35"s all summer long with no problems. Yes it's sluggish, but it's OK to drive around town. Sacramento is almost at sea level and pretty flat.
Having said that I'm upgrading to 4.88s. I have all the parts. Now I need to find the time to do it.

Regards

Alvaro
 
alvarorb said:
Mark,

Part of your problem might be altitude. I've had my 35"s all summer long with no problems. Yes it's sluggish, but it's OK to drive around town. Sacramento is almost at sea level and pretty flat.
Having said that I'm upgrading to 4.88s. I have all the parts. Now I need to find the time to do it.

Regards

Alvaro

Although, Alvaro, you had a torque converter stall on Dusy Ershim likely from a poor match between your gearing and your tranny. 4.88's make the gearing really sweet-about 150 higher rpm for equivbalent speed in high range. Low range is better but less noticable except in extreme circumstances like Alvaro's.
 
alvarorb said:
Mark,

Part of your problem might be altitude.
Part, no doubt, but I have far more problems than altitude. :D
 
Yeah , just try it and see for yourself . If too much , regear ...

I pose my 80 with 315 MT's and just drove across Canada and back . The only place they sucked was in the Rockies on some passes . Gawd , they sucked a$$ ... but everywhere else it's ok .

Keep in mind I have a Truspeed recallibrator installed , and keep my power button on 24/7 . I also take the OD off on every grade down the hwy . Whatever .. no big fricken deal . :flipoff2:

If a couple grand landed in my lap , I'd do that 4:88 upgrade in a heartbeat .... after my clear front signals , of course :cool:

T
 
mabrodis hope your not comedian

if so quit immediately!!! not even close to funny any day. but anyway i do some wheeling but nothing extreme like rock crawling. i drive on beaches, trails, snow and mud at times. I really would like it for the looks and height basically. However i dont want to do it if it will but added strain on the birfs and anything else.
 
The bigger the tires, the taller the gear, the more strain on the birfs.
From the short description of what you say you're going to do, the 285s (or possibly 295s) (75/R16, of course) will be more than adequate. I was able to do some fairly extreme trails with stock gears and the 285 MTRs.
 
I've been running 35's with stock gearing for years, mountain passes can be a pain but other than that once ya get used to it it's not bad, as for extra wear and tear my experiance has been very minimal if any. I would go with 315's if I were you, with such a big truck, anything less looks almost stock, eventually I will lower my gears, but after alot of other mods!!
 

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