Drive Train Gearing Bible

Gearboxs, Transfers, Tailshafts, Diffs, axles and CVs

Re: Drive Train Gearing Bible

Postby rory18 on Mon, 16 Mar 2015 6:46 +0000

Gear ratios are correct, but I thought the diff ratios where 3.73 on a 5 speed manual 1kd
User avatar
rory18
Platinum Subscriber
 
Posts: 777
Joined: Thu, 20 Oct 2011 10:10 +0000


 

Re: Drive Train Gearing Bible

Postby ali_70 on Mon, 16 Mar 2015 7:10 +0000

according to this catalog :
http://www.toyota.com.au/static/vehicle ... _saver.pdf


& this site : hilux 2.7 4-speed automatic
http://m.fblife.com/bbs/thread_2629775.html

transmission is a343f & axle is B06A (toyota motor thailand co,ltd)
B06A ratio is 3.909 but according to above catalog hilux 2.7 manual & auto diff ratio is 4.1
ali_70
 
Posts: 3
Joined: Sun, 23 Sep 2012 11:12 +0000

Drive Train Gearing Bible

Postby packeteer on Sat, 21 Mar 2015 7:14 +0000

rory18 wrote:Gear ratios are correct, but I thought the diff ratios where 3.73 on a 5 speed manual 1kd


diesel auto is 3.7, everything else is 3.5 (in 4x4 models)
edit: apparently this has changed with the 5spd auto, which uses a 3.9 ratio
Last edited by packeteer on Thu, 06 Aug 2015 6:34 +0000, edited 1 time in total.
2011 Dual Cab SR5 D4D manual.
build thread
shed page
User avatar
packeteer
 
Posts: 3466
Joined: Wed, 27 Apr 2011 1:49 +0000
Location: Chatswood, Sydney

Re: Drive Train Gearing Bible

Postby nicebike on Sun, 22 Mar 2015 5:43 +0000

rory18 wrote:Gear ratios are correct, but I thought the diff ratios where 3.73 on a 5 speed manual 1kd


I wish they were :lol:
nicebike
 
Posts: 736
Joined: Thu, 27 Feb 2014 7:28 +0000

Re: Drive Train Gearing Bible

Postby rory18 on Sun, 22 Mar 2015 8:33 +0000

How embarrassing, been looking at the wrong gear ratio chart this whole time...
User avatar
rory18
Platinum Subscriber
 
Posts: 777
Joined: Thu, 20 Oct 2011 10:10 +0000

Re: Drive Train Gearing Bible

Postby packeteer on Sun, 22 Mar 2015 8:45 +0000

for my first re-gear I used 3.7's out of an auto. (mine is diesel manual)

they certainly took the edge off 33's, but not enough. I'm now running 4.1's which is a bit low for the highway (2500rpm at 110), but everywhere else is much better.
2011 Dual Cab SR5 D4D manual.
build thread
shed page
User avatar
packeteer
 
Posts: 3466
Joined: Wed, 27 Apr 2011 1:49 +0000
Location: Chatswood, Sydney

Re: Drive Train Gearing Bible

Postby rory18 on Sun, 22 Mar 2015 9:12 +0000

Really packeteer? I just acquired a set of 4.1:1 gear set to help with the low speed driving. How is the fuel consumption like when spinning at 2500 all day? I have a long drive coming up soon.
User avatar
rory18
Platinum Subscriber
 
Posts: 777
Joined: Thu, 20 Oct 2011 10:10 +0000

Re: Drive Train Gearing Bible

Postby packeteer on Sun, 22 Mar 2015 9:25 +0000

fuel use was slightly better, but the extra noise took some getting used to

I used to have the radio on 8 all the time, but these days it sits on 12 or higher :(
2011 Dual Cab SR5 D4D manual.
build thread
shed page
User avatar
packeteer
 
Posts: 3466
Joined: Wed, 27 Apr 2011 1:49 +0000
Location: Chatswood, Sydney

Re: Drive Train Gearing Bible

Postby rory18 on Sun, 22 Mar 2015 9:32 +0000

Sound deadening my friend, it honestly makes it more comfortable in the cabin. Even with my worn out 33's
User avatar
rory18
Platinum Subscriber
 
Posts: 777
Joined: Thu, 20 Oct 2011 10:10 +0000

Re: Drive Train Gearing Bible

Postby packeteer on Sun, 22 Mar 2015 9:50 +0000

mine's an SR5, so has a fair bit already. but yes, I am planning to strip it out, paint with bed liner or similar, then add sound absorption
2011 Dual Cab SR5 D4D manual.
build thread
shed page
User avatar
packeteer
 
Posts: 3466
Joined: Wed, 27 Apr 2011 1:49 +0000
Location: Chatswood, Sydney

Re: Drive Train Gearing Bible

Postby Blownv6lux on Mon, 25 May 2015 9:23 +0000

Bit of a noob to the gearing side.. I got the v6 auto.. 285/75r16 what would be the choice of gearing I should look at??
Blownv6lux
 
Posts: 14
Joined: Fri, 17 May 2013 12:36 +0000

Re: Drive Train Gearing Bible

Postby packeteer on Tue, 26 May 2015 6:40 +0000

3.9 or 4.1
go the lower gear if you tow or go offroad regularly
2011 Dual Cab SR5 D4D manual.
build thread
shed page
User avatar
packeteer
 
Posts: 3466
Joined: Wed, 27 Apr 2011 1:49 +0000
Location: Chatswood, Sydney

Re: Drive Train Gearing Bible

Postby amitch888 on Tue, 26 May 2015 9:33 +0000

And remember the lower gear is 4.1's not 3.9's
FCCW
Mitch's Build

Education is what you get when you read the fine print, experience is what you get when you don't.
User avatar
amitch888
Moderator
 
Posts: 5231
Joined: Fri, 16 Apr 2010 7:18 +0000
Location: Tennyson, Vic

Re: Drive Train Gearing Bible

Postby keleher on Wed, 05 Aug 2015 8:42 +0000

Hi guys
I have been over this thread a few times and every time I get to the end I am even more confused. I have a diesel manual and I put on 265/75/16 a few months back, having to gear down all the time is getting to me and at 1500 RPM down she doesn't sound happy. Tossing up between a 3.9 and 4.1 regear, the diff specialist is pushing the 4.1 saying 3.9 isn't with it as 4.1 has more gains but is yet to elaborate. I know 3.9 will bring it to stock gearing and 4.1 will bring it up 5.3% from stock gearing but I am wondering what difference this 5% will make? I know it is only 100 odd RPM but I wasn't a fan of the 8% difference in the opposite direction.
Image

what the pros and cons are of going to 4.1? From what I can gather
Pros
Touch better for crawling
quicker take offs

Cons
Revs too high?

I'm all ears for anyone's experience/input
cheers
User avatar
keleher
 
Posts: 49
Joined: Thu, 30 Jan 2014 9:50 +0000

Re: Drive Train Gearing Bible

Postby Hilux Max on Thu, 06 Aug 2015 6:12 +0000

You have a mnaual. that in itself should push you more towards the 3.9's because of the shorter 1st gear you have for takeoff and low range crawling, and still have 4 more options to go.

Auto's, depending on your use, and the much longer 1st gear, Id reccomend leaning more towards 4.1 than 3.9.

but as mentioned, depends on vehicle use/driving requirement/style.
User avatar
Hilux Max
Valued Contributor
 
Posts: 12434
Joined: Sun, 07 Jan 2007 12:00 +0000

Re: Drive Train Gearing Bible

Postby packeteer on Thu, 06 Aug 2015 6:40 +0000

for 265's, 3.9 ratio would be the best choice

see if you can get a second hand set out of an auto
2011 Dual Cab SR5 D4D manual.
build thread
shed page
User avatar
packeteer
 
Posts: 3466
Joined: Wed, 27 Apr 2011 1:49 +0000
Location: Chatswood, Sydney

Re: Drive Train Gearing Bible

Postby keleher on Thu, 06 Aug 2015 8:42 +0000

cheers lads 3.9 it is. Think the diff guy just wanted to make money on the 4.1 instead of me supplying 3.9.
User avatar
keleher
 
Posts: 49
Joined: Thu, 30 Jan 2014 9:50 +0000

Re: Drive Train Gearing Bible

Postby StevenS on Sat, 29 Aug 2015 8:23 +0000

I've just trawled through all 28 pages but could I get some confirmation

My Prado 120 series 3.9 rear diff just shat itself, but to replace it will cost me close to a grand. However I can source a rear diff from a 100 series with 4.1s for bugger all

Will the 100 series rear diff fit the Hilux? I'm not worried about the fronts I can figure that out later. The ute only ever really spends time driving around town and towing trailers so I figure a step up would help.
User avatar
StevenS
 
Posts: 1172
Joined: Tue, 21 Feb 2012 7:49 +0000
Location: SE QLD

Re: Drive Train Gearing Bible

Postby rory18 on Sat, 29 Aug 2015 11:23 +0000

100 series may be 9.5'' diff instead of the 8'' of the hilux. Can't confirm that just yet.
User avatar
rory18
Platinum Subscriber
 
Posts: 777
Joined: Thu, 20 Oct 2011 10:10 +0000

Re: Drive Train Gearing Bible

Postby StevenS on Sun, 30 Aug 2015 8:16 +0000

Anyone able to confirm whether 100 series rear is compatible?
User avatar
StevenS
 
Posts: 1172
Joined: Tue, 21 Feb 2012 7:49 +0000
Location: SE QLD

PreviousNext

Return to Drive Train Components

Who is online

Users browsing this forum: No registered users and 10 guests