User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 07-11-2022, 03:10 PM #1
Mud Taco's Avatar
Mud Taco Mud Taco is offline
Junior Member
 
Join Date: Feb 2016
Location: Central Coast CA
Posts: 22
Real Name: Bo
Mud Taco is on a distinguished road
Mud Taco Mud Taco is offline
Junior Member
Mud Taco's Avatar
 
Join Date: Feb 2016
Location: Central Coast CA
Posts: 22
Real Name: Bo
Mud Taco is on a distinguished road
Front Diff (3rd member) question

I have a 1st gen '89 SR5 V6 5spd 4Runner.
I need to swap out the 4:10 front diff with a used one. I have found conflicting info regarding if it matters if it came with auto hubs or not. One fitment guide I found showed that it matters on 4runners 1990 and after and Pickups 1989 and after, but on the years before that it doesn't matter. But i had also read that if I use a front diff from one without ADD and install it in one that came with ADD, then it requires modification. I need to nail this down so I can order the correct one... BTW, the used one I am looking at is out of a later year, but are supposed to be the same for 86-95. There is only one option, if came came with ADD or not.
FYI, my Runner came with auto hubs, but I swapped them out for manual hubs a while back and have no plans on ever reversing that.
Thank you for any info you can offer.
__________________
"I was me but now he's gone."
Metallica
"...it is no longer I who live but Christ lives in me..."
Galatians 2:20
Mud Taco is offline   Reply With QuoteReply With Quote
Old 07-14-2022, 06:53 PM #2
Jackalope Runner's Avatar
Jackalope Runner Jackalope Runner is offline
Junior Member
 
Join Date: Apr 2019
Location: NorCal and TN
Posts: 12
Jackalope Runner is on a distinguished road
Jackalope Runner Jackalope Runner is offline
Junior Member
Jackalope Runner's Avatar
 
Join Date: Apr 2019
Location: NorCal and TN
Posts: 12
Jackalope Runner is on a distinguished road
If you find another diff you can convert the long side axle either direction with what you have. If your diff is hashed but the outer axle is fine you can take a ADD front diff and swap your axle on to it. Really straight forward. Just converted another 2nd gen 4runner to non ADD style by swapping long side axle the other day.
Jackalope Runner is offline   Reply With QuoteReply With Quote
Old 07-14-2022, 09:31 PM #3
Mud Taco's Avatar
Mud Taco Mud Taco is offline
Junior Member
 
Join Date: Feb 2016
Location: Central Coast CA
Posts: 22
Real Name: Bo
Mud Taco is on a distinguished road
Mud Taco Mud Taco is offline
Junior Member
Mud Taco's Avatar
 
Join Date: Feb 2016
Location: Central Coast CA
Posts: 22
Real Name: Bo
Mud Taco is on a distinguished road
Thank you.
Which gaskets did you need to replace when you did that?
__________________
"I was me but now he's gone."
Metallica
"...it is no longer I who live but Christ lives in me..."
Galatians 2:20
Mud Taco is offline   Reply With QuoteReply With Quote
Old 07-15-2022, 01:16 AM #4
4Reak Show's Avatar
4Reak Show 4Reak Show is offline
Senior Member
 
Join Date: Jul 2015
Location: Northern California
Age: 35
Posts: 1,462
4Reak Show is a glorious beacon of light 4Reak Show is a glorious beacon of light 4Reak Show is a glorious beacon of light 4Reak Show is a glorious beacon of light 4Reak Show is a glorious beacon of light 4Reak Show is a glorious beacon of light
4Reak Show 4Reak Show is offline
Senior Member
4Reak Show's Avatar
 
Join Date: Jul 2015
Location: Northern California
Age: 35
Posts: 1,462
4Reak Show is a glorious beacon of light 4Reak Show is a glorious beacon of light 4Reak Show is a glorious beacon of light 4Reak Show is a glorious beacon of light 4Reak Show is a glorious beacon of light 4Reak Show is a glorious beacon of light
I helped my uncle do a swap on his. He has a 86 pickup and we got a 94 4Runner ADD front diff. Swapped his old long side and installed a new seal for that side and itís been fine ever since.

So youíll need the seal that goes to the long side shaft housing. All mounting on our project was exact same.
__________________
The 4Reak Show: 1995 4Runner, 3.4 swapped, manual conversion, supercharged & 7th injected, Eaton TrueTrac in rear, poly bushings F&R, lots of other outrageous add ons...

Wife's: 2016 Trail Premium, bone stock until she joins T4R.org one day...
4Reak Show is offline   Reply With QuoteReply With Quote
Old 08-12-2022, 03:14 AM #5
Mud Taco's Avatar
Mud Taco Mud Taco is offline
Junior Member
 
Join Date: Feb 2016
Location: Central Coast CA
Posts: 22
Real Name: Bo
Mud Taco is on a distinguished road
Mud Taco Mud Taco is offline
Junior Member
Mud Taco's Avatar
 
Join Date: Feb 2016
Location: Central Coast CA
Posts: 22
Real Name: Bo
Mud Taco is on a distinguished road
I have a follow up question.

The front diff I ordered from a shop off ebay arrived. I opened the top to double check it and replace the gasket. Well, it is not a 4:10 like they said it was. It is a 3:90. I triple checked, it has 39 teeth, not 41.

Am I correct in assuming that I can't use this and need to get another 4:10?

Also, they said the one that was sent to me came off a '95 4runner V6 4wd. Did they even come with 3:90 gearing?
__________________
"I was me but now he's gone."
Metallica
"...it is no longer I who live but Christ lives in me..."
Galatians 2:20
Mud Taco is offline   Reply With QuoteReply With Quote
Old 08-12-2022, 08:36 AM #6
fourwd1's Avatar
fourwd1 fourwd1 is online now
Moderator
 
Join Date: Jun 2004
Location: the Socialist State of Maryland
Posts: 11,116
Real Name: Soylent Green sales
fourwd1 is a jewel in the rough fourwd1 is a jewel in the rough fourwd1 is a jewel in the rough
fourwd1 fourwd1 is online now
Moderator
fourwd1's Avatar
 
Join Date: Jun 2004
Location: the Socialist State of Maryland
Posts: 11,116
Real Name: Soylent Green sales
fourwd1 is a jewel in the rough fourwd1 is a jewel in the rough fourwd1 is a jewel in the rough
Yes, depending on stock tire and/or transmission, some had a 3.90 ratio.
No, you can't run a 3.90 front with a 4.10 rear. You need to get a proper 4.10 front diff.
__________________
- the Internet - the mother-ship of people who don't know much and aren't afraid to go public
'84 4Runner - ARBed 5.29s F&R, 4.7 & 2.28 t-cases, 2" drive train lift, BudBuilt x-member/skid, 30 spl Longs
'83 Toy P/U - Buick 231 V6, Holley 4 bbl, Weiand intake, Downey headers, TH350 w/700R4 low gearset,
'89 4Runner SR5 - stock
fourwd1 is online now   Reply With QuoteReply With Quote
Old 08-18-2022, 12:43 AM #7
kc15842 kc15842 is offline
Member
 
Join Date: Feb 2014
Location: Lake Elsinore, Ca
Posts: 464
Real Name: Kevin
kc15842 will become famous soon enough
kc15842 kc15842 is offline
Member
 
Join Date: Feb 2014
Location: Lake Elsinore, Ca
Posts: 464
Real Name: Kevin
kc15842 will become famous soon enough
As upset as you may be now it would have been worse if you completed the swap and found out on the first test drive.

I know I have good R
& P if you want to put a set of used 4.10 gears in.
__________________
1987 22R-E, SR5. 5 Speed, 31's BFG A/T, stock wheels. 4.56 Gears, Rear Detroit locker Front True Track. 1.5" BJ Spacers & Extended Shackles in the rear.

1992 3.0, SR5. 5 Speed. 31's BFG M/T, stock wheels. 4.30 Gears-NON ADD- manual hubs, Elocker, 1.5" BJ Spacers, Moog springs w/ spacers. Sold
kc15842 is offline   Reply With QuoteReply With Quote
Old 08-31-2022, 03:28 AM #8
Mud Taco's Avatar
Mud Taco Mud Taco is offline
Junior Member
 
Join Date: Feb 2016
Location: Central Coast CA
Posts: 22
Real Name: Bo
Mud Taco is on a distinguished road
Mud Taco Mud Taco is offline
Junior Member
Mud Taco's Avatar
 
Join Date: Feb 2016
Location: Central Coast CA
Posts: 22
Real Name: Bo
Mud Taco is on a distinguished road
Well, I got the replacement 3rd and it's a 4.10 this time thankfully. But I have another problem. The legs are not interchangeable as I was told they would be. You can see in the pics that both the input shaft on the diff and the legs are very different.
So, my question is this. Can I just pull off the vacuum unit and bolt on a cover and use that leg instead? Or would it not engage the 4wd not having the vacuum or cause some other problem? I would very much like to find a way to get this done and use what I have if possible.
I know I could take my original 3rd with some broken teeth on the ring gear and have them use the good ring gear from the used one I just bought... But that would totally defeat the purpose of buying a used one. I don't want to pay an arm and a leg to have it rebuilt.
As a reminder, I have a 1st gen '89 that came with crappy auto hubs (that don't use vacuum) that I swapped out for Warn manual hubs.
Thank you
Attached Images
Front Diff (3rd member) question-3rd-1-jpg  Front Diff (3rd member) question-3rd-3-jpg  Front Diff (3rd member) question-3rd-5-jpg 
__________________
"I was me but now he's gone."
Metallica
"...it is no longer I who live but Christ lives in me..."
Galatians 2:20
Mud Taco is offline   Reply With QuoteReply With Quote
Reply

Tags
add , diff , front , hubs , matters

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS 3rd Gen 4runner elocker 3rd member plus front diff 4.30 gears $700 Santa Cruz Thevance1 For Sale: T4R Items 0 09-26-2018 01:42 PM
97 Ltd 4wd no e-locker rear diff 3rd Member stuck on axle housing; Broken diff stud. azcat90 3rd gen T4Rs 19 09-08-2016 12:07 PM
Front diff question 3rdgenfan 3rd gen T4Rs 8 06-14-2016 11:11 PM
Front diff Question some help mien4x4 3rd gen T4Rs 5 10-30-2012 06:34 PM
front Diff Oil question riffman12 3rd gen T4Rs 1 10-27-2012 11:16 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 09:39 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2022 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2022 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2022 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Copyright © 2020