Rear Axle Gearing--Stumped
#1
Registered User
Thread Starter
Join Date: May 2008
Location: Wisconsin
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
Rear Axle Gearing--Stumped
So I have a 1989 2wd yota with a 4 spd manual transmission. I have larger tires on it right now and it seems kinda sluggish. So my plan it to a different set of gears in the rear. First though, I want to figure out what my gearing is now. I used this web site to determine the gearing that I have. http://www.off-road.com/trucks4x4/ar....jsp?id=274535 I checked my door sticker and this is what it said: C/TR 8D8/LA81 A/TM G662/G40. I know that the number that i have to pay attention to are G662. After comparing that on the gearing chart it reads that my truck has 3.071 gears in that back. This does not sound right to me. I thought I would have 3.73 gears or 3.90 gears. Help would be greatly appreaciated!
#3
Registered User
Thread Starter
Join Date: May 2008
Location: Wisconsin
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
Thanks DeathCougar. I am actually thinking of swapping out the entire axle for a junkyard 4x4 rear axle with 4.10 gearing (which i Believe is pretty common). I think that this would be a lot easier for me than trying to change the gearing myself or paying a shop to do it. As is stands right now with 3.07 gearing my RPM's at 60mph is 2,050 which is kind of low...not much passing power. If i were to change to 4.10 gearing my RPM's would be at 2,737 according to my calculation which isn't horribly high.
Finally another reason that i was to change the gearing is so i can idle slower in first gear out on the trails since i do not have transfer-case with my 2wd LOL!
Finally another reason that i was to change the gearing is so i can idle slower in first gear out on the trails since i do not have transfer-case with my 2wd LOL!
#5
Registered User
Join Date: Jan 2009
Location: Norwich, Ct.
Posts: 48
Likes: 0
Received 0 Likes
on
0 Posts
Unless your 2WD truck is one ton it probably has the smaller 7 1/2 " rear and the 4X4 axle will be the 8" rear. It won't fit. Swapping the whole axle is easy you just have to weld the spring perches on the bottom of the axle, but you will have 6 lugs on the back and five on the front.
#7
Registered User
Thread Starter
Join Date: May 2008
Location: Wisconsin
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
According to the differential chart from my first post, my third member is an 8.0", so it would fix most of the 4X4 third members. Also does anyone have an idea on how much these things cost at a junkyard?
Trending Topics
#9
The U-pull it junkyards around Portland sell complete rear ends for $115, thirds are cheaper.
On craigslist I have seen thirds anywhere from $50-350.
You can get a new/rebuild third from somewhere like Jaws Gear or East Coast Gear for around $400,
Shipping on a third is running about $65-75.
On craigslist I have seen thirds anywhere from $50-350.
You can get a new/rebuild third from somewhere like Jaws Gear or East Coast Gear for around $400,
Shipping on a third is running about $65-75.
#11
Registered User
iTrader: (1)
www.gearinstalls.com
its easy... undo the 4 bolts holding your driveshaft on...
take off wheels and tires... unbolt the backing plate/axle (4 bolts) from the axle tube...
slide axles all the way out... unbolt 8 bolts holding the 3rd member to the pumpkin...
apply blue RTV to the new 3rd after cleaning the mating surface...
place dif in axle and finger tight the bolts... have a beer or 6 (wait 1/2 hour) torque the bolts down good and tight... reinsert the axles being careful not to ruin the inner seals...
bolt axles back on... bleed the brakes... replace wheels... reinstall driveshaft bolts with blue loctite... drive away...
shouldnt take more than an hour and a half...
its easy... undo the 4 bolts holding your driveshaft on...
take off wheels and tires... unbolt the backing plate/axle (4 bolts) from the axle tube...
slide axles all the way out... unbolt 8 bolts holding the 3rd member to the pumpkin...
apply blue RTV to the new 3rd after cleaning the mating surface...
place dif in axle and finger tight the bolts... have a beer or 6 (wait 1/2 hour) torque the bolts down good and tight... reinsert the axles being careful not to ruin the inner seals...
bolt axles back on... bleed the brakes... replace wheels... reinstall driveshaft bolts with blue loctite... drive away...
shouldnt take more than an hour and a half...
#12
Registered User
Thread Starter
Join Date: May 2008
Location: Wisconsin
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
Another thing i just thought of, would i run into any problems in replacing my 2wd 3rd with one from a 4x4. For example, would the splines on my 2wd's axles fit into the splines in the new 3rd?
#13
Registered User
Join Date: Mar 2008
Location: Chico, California
Posts: 3,870
Likes: 0
Received 0 Likes
on
0 Posts
Yea man search around craigslist, that is most likely your best bet..
Or
Pm deathcougar and see what he has...
I had a 4cyl diff with 4.10's on craiglist for $40 and nobody wanted it.. So i decided to weld it up and keep it as a trail spare...
Or
Pm deathcougar and see what he has...
I had a 4cyl diff with 4.10's on craiglist for $40 and nobody wanted it.. So i decided to weld it up and keep it as a trail spare...
#14
Registered User
Thread Starter
Join Date: May 2008
Location: Wisconsin
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
I found a guy that has an axle that came out of a 1987 4runner 4x4 22R. Would I be able to take that 3rd member and swap it out with mine. My concern is that his 4runner is a 1987 and my truck is a 1989.
#16
https://www.yotatech.com/forums/f129...nstall-163698/
#17
Registered User
Thread Starter
Join Date: May 2008
Location: Wisconsin
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
Thanks MATT16, I have seen your post on the 3rd member install before. Its pretty good.
The guy that I am thinking about getting the axle from is only selling as a full axle, not just the 3rd member. He is asking for 150 dollars for the whole rear axle. Would this be too much?
The guy that I am thinking about getting the axle from is only selling as a full axle, not just the 3rd member. He is asking for 150 dollars for the whole rear axle. Would this be too much?
Thread
Thread Starter
Forum
Replies
Last Post
FS[PacSouthWest]: 2- 8"3rd members:4.88 ratchet lockers,new setup kit, rear axle rebuild kit,diff armor
jerusry
Axles - Suspensions - Tires - Wheels
1
10-19-2015 05:28 PM
FS[GreatLakes]: Toyota collection part out
88sasturbotoy
Axles - Suspensions - Tires - Wheels
2
08-11-2015 01:56 AM