Author Topic: Different Gear Ratios for Front and Rear - Is it a problem?  (Read 2316 times)

0 Members and 1 Guest are viewing this topic.

Rock Rat 2

  • Offline Dusty Trails
  • *
  • Turtle Points: 0
  • Posts: 1
  • Member since May '15
  • Crawling with Marlin
    • View Profile
I have a 1990 4Runner with a DANA 44 Solid Front Axle, and standard Toyota 3rd Member in the rear, both currently 4:88's.  This work great when I was running 33's, but now I have graduated to 35's and driving on the highway up a grade isn't so good.  I want to upgrade to 5:29's, however DANA doesn't make 5:29's, the closet matching ratio is 5:38's.  My question is this: Is there any major issue with having my front gear ratio being 5:38 and my Rear 5:29?

Thanks!
RR2

jimbo74

  • Offline Gold Turtle Award
  • *
  • Turtle Points: 2829
  • Male Posts: 8,726
  • Member since Sep '05
    • View Profile
there isn't that much of an issue, you aren't going to be running 4x4 on the road where there is no give and binding it up. Sure it isn't ideal, but a lot of people have done it for a long time without issues
:usa:

The cost of freedom is always high, but Americans have always paid it. And one path we shall never choose, and that is the path of surrender, or submission.

~ John F. Kennedy ~

Goldrush

  • Offline The 1K Club
  • *
  • Turtle Points: 145
  • Male Posts: 1,381
  • Member since Jan '10
  • wheelin!!
    • View Profile
Yupp. No issue. Run it!


Sent from my iPhone using Tapatalk
-Zack- aka uncle Zack!                GOT MARLIN?

_______________________________________________
|___[||||||||||][|||T O Y O T A|||][||||||||||]____|
|___[||||||||||][|||||||||][|||||||||][||||||||||]____|

1985CRAWLER

  • Offline The 1K Club
  • *
  • Turtle Points: 267
  • Male Posts: 1,163
  • Member since Feb '13
  • Backyard Built
    • View Profile
got a 91 ex cab with dana 44 front swap. has, 5.38s up front and toyota rear axle with 5.29s.

has been setup like this for years with lots of wheeling time on it. never had problems with it.

the percent difference is so little that there will be no binding, guys have ran this setup plenty of times with success.
low n' slow 85 runner SR5 22re,rcvs ,Duals,5.29s,Detroits f&r,40s,RUF,Chevy 63 rears,Armored,Cage

bobbed and beat 91 ex cab,3RZ swapped,dual ultimates, dana 44 sas 5.38/5.29 combo,37s, RUF, 63 rears,ARB front, detroit rear,cage

http://board.marlincrawler.com/index.php?topic=96250.msg1073007;topicseen#msg1073007

http://board.marlincrawler.com/index.php?topic=26920.390

emsvitil

  • Online Silver Turtle Award
  • *
  • Turtle Points: 6065
  • Male Posts: 3,496
  • Member since May '07
    • View Profile
    • emsvitil's album
    • Buy me a soda
You could put larger diameter tires up front...............
Ed
SoCal
86 SR5 XtraCab
22RE  W56B
31x10.50R15

blackdiamond

  • Offline Gold Turtle Award
  • *
  • Turtle Points: 1174
  • Male Posts: 4,936
  • Member since Dec '03
  • Crawlin with Marlin
    • View Profile
The difference is less than 2% which equates to a 34.5 inch vs. a 35 inch tires.  You could have  that much difference between a new and warn off road tire I think.  I have no real world experience, but it doesn't seem to be a significant difference on paper.  It might compound slightly with the higher gears in the front because at the same air pressure the front tires generally have a smaller rolling diameter due to the extra weight up front.  Just run the back tires several pounds lower maybe.
1989 4Runner: Dual Ultimate (Inchworm front & Marlin 4.70 rear), Marlin Twin Stick, 1200-lb clutch, 4.88 R&P, Aussie Front, Detroit rear, 30-spline Longs, Long hub gears, ARP hub and knuckle studs & 35x12.50 Cooper STT PRO tires.  Marlin rear bumper & sliders.  FROR front bumper.  SAS with Alcan springs & Rancho 9000XL shocks.  Budbuilt Bolt-on traction bar.  Custom Interior Cage by Those Guys Rod and Customs.

Moab Tested & Rubicon Approved

Speed

  • Offline Rock Master
  • ***
  • Turtle Points: -22
  • Male Posts: 127
  • Member since Jun '14
  • Crawling with Marlin
    • View Profile
    • Buy me some coffee
Just run the newer tires up front,the more worn out ones on the back,but then you SHOULD be doing that even with matched axle ratios. Should even it up well. :yupyup:
Speed
"HMMmmmm--What can I make outta that??"

   "Bash On Regardless"

Rockcrawlintoy

  • 4 doors for more whores
  • Offline The 2K Group
  • ***
  • Turtle Points: 2000
  • Male Posts: 2,291
  • Member since Dec '03
  • RIP Kyle
    • View Profile
    • Buy me a soda
I ran 1985crawltoy's truck with that set up since 2002 with no issues. I would run it again as well
Resident Jeep Guy
2007 JKU All Stock
ECV 7-11

BigMike

  • Administrator
  • Offline Gold Turtle Award
  • *
  • Turtle Points: 1789
  • Male Posts: 18,126
  • Member since Apr '02
  • 511:1 Club
    • View Profile
    • Bone-Stock Plane-Jane 1981 Shortbed Pickup
I don't have any experience with this but agree that so long as you aren't running around pavement in 4WD you should be okay. I don't like the idea of lower in the front however, but understand options are limited. I set up my Axial R/C Crawler with a higher ratio in the front which made a noticeable difference in keeping the front end down in steep climbs.

BigMike
New Instagram: @SlowestTacoma

Check out our new Rock Crawling Videos!
2016 56-speed 580:1 Triple T/Case 3rd gen Tacoma Rock Crawler   
1981 36-speed 511:1 3RZ-FE Rock Crawler
1987 6-speed Supercharged 4A-GZE MR2
Things are only impossible until they are not.
"The worst of both worlds, the best of neither." -abnormaltoy
"An informed question. But difficult to answer. I am what you see." -Nanaki

Speed

  • Offline Rock Master
  • ***
  • Turtle Points: -22
  • Male Posts: 127
  • Member since Jun '14
  • Crawling with Marlin
    • View Profile
    • Buy me some coffee
Taller gearing in the front (lower numerical ratio) does help handling-it'll tend to "pull" you whatever direction you steer,making for better cornering.
   Speed
"HMMmmmm--What can I make outta that??"

   "Bash On Regardless"

 
 
 
 
 

Related Topics

10 Replies
2848 Views
Last post Jun 16, 2004, 05:53:31 PM
by 79coyotefrg
1 Replies
1590 Views
Last post Jun 21, 2002, 03:00:48 AM
by RogueDogg
3 Replies
3095 Views
Last post Nov 03, 2003, 04:10:08 PM
by 79coyotefrg
36 Replies
5199 Views
Last post Nov 04, 2015, 08:03:56 PM
by CodyRB93
8 Replies
1496 Views
Last post Nov 08, 2008, 05:29:59 AM
by RN37DD