Go Back   Ford Truck Enthusiasts Forums > Misc. > Clutch, Transmission, Differential, Axle & Transfer Case
Sign in using an external account
Register Forgot Password?


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 08-07-2009, 03:30 PM
atomicjoe23 atomicjoe23 is offline
Senior User
 
Join Date: Mar 2008
Location: Silverdale, WA
Posts: 371
atomicjoe23 is starting off with a positive reputation.
Matching front & rear gear ratios?

OK. . .stupid question!

I'm new to modifying 4WD's. . .I haven't messed with axle gears in a 4WD before so I figured I'd better ask just to make sure I know.

Do your front and rear axle ratios need to match?

If they don't, what would be the advantage/disadvantage of this?

Thanks for cluing me in on this.
__________________
1979 F-150 4x4--351M/Auto
Reply With Quote
  #2  
Old 08-07-2009, 03:32 PM
Skip1970's Avatar
Skip1970 Skip1970 is offline
Semper Fi MOFO!
 
Join Date: Nov 2008
Location: Alaska #1
Posts: 10,443
Skip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputation
thronsonskip
they dont have to match, but if you wanted to use 4x4 youd need to run 2 different tire sizes with the different axle ratios
__________________
7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
Reply With Quote
  #3  
Old 08-07-2009, 03:32 PM
Fleet Guy Fleet Guy is offline
Junior User
 
Join Date: Aug 2007
Posts: 58
Fleet Guy is starting off with a positive reputation.
Yes they must match. Picture your rear axle doing 50 and your front doing 40 or 60. Your transfer case will not last long.
Reply With Quote
  #4  
Old 08-07-2009, 03:39 PM
Skip1970's Avatar
Skip1970 Skip1970 is offline
Semper Fi MOFO!
 
Join Date: Nov 2008
Location: Alaska #1
Posts: 10,443
Skip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputation
thronsonskip
Quote:
Originally Posted by Fleet Guy View Post
Yes they must match. Picture your rear axle doing 50 and your front doing 40 or 60. Your transfer case will not last long.

you are wrong.

with 2 different tire sizes it can be dooable..
__________________
7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
Reply With Quote
  #5  
Old 08-07-2009, 03:45 PM
atomicjoe23 atomicjoe23 is offline
Senior User
 
Join Date: Mar 2008
Location: Silverdale, WA
Posts: 371
atomicjoe23 is starting off with a positive reputation.
That's what I figured. . .I just wanted to double check.

Like I said. . .stupid question, but. . .
__________________
1979 F-150 4x4--351M/Auto
Reply With Quote
  #6  
Old 08-07-2009, 03:47 PM
05 super's Avatar
05 super 05 super is offline
Senior User
 
Join Date: Feb 2008
Location: yukon
Posts: 350
05 super is starting off with a positive reputation.
Just change both and be done with it. If not for you, then for the next guy that buys it and runs the same size tires. GRENADE!!!!!!!
__________________
08 f150, white supercrew, 6.5' box, 5.4, 3.73 LSD, 265-70-18. Gryphon with 87 perf and 87 tow custom tunes, tinted heads and tails in white and black, Gott's mod .......Glen........
Reply With Quote
  #7  
Old 08-07-2009, 03:59 PM
Fleet Guy Fleet Guy is offline
Junior User
 
Join Date: Aug 2007
Posts: 58
Fleet Guy is starting off with a positive reputation.
I never thought of installing 2 different tire sizes. Seems like a lot of hassle and I am not sure what the benifit would be. But yes in that case you are right b-uno, it is possible.
Reply With Quote
  #8  
Old 08-07-2009, 04:11 PM
atomicjoe23 atomicjoe23 is offline
Senior User
 
Join Date: Mar 2008
Location: Silverdale, WA
Posts: 371
atomicjoe23 is starting off with a positive reputation.
I definitely don't want to have two different size tires. . .that would look DUMB!!!

I'm swapping both the front and the rear axles. . .I just wanted to make sure about that before I bought any axles. . .

. . .guess I'll start looking for the D60 front first. . .seems to be a little harder to find so it will probaby be easier to find a rear to match the front than vice versa since I don't want to have to buy gears and set them up in addition to the axle swap
__________________
1979 F-150 4x4--351M/Auto
Reply With Quote
  #9  
Old 08-07-2009, 05:06 PM
85e150six4mtod 85e150six4mtod is offline
Post Fiend
 
Join Date: Apr 2004
Posts: 16,234
85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation
Hundreths don't matter much:

3.50/3.55
4.11/4.10
4.11/4.09 all ok.

Tenths, hhm, now you are in the worry zone:

3.25/3.50 is a no-go for example.
3.73/3.91 I don't think so.
Reply With Quote
  #10  
Old 08-07-2009, 05:16 PM
Skip1970's Avatar
Skip1970 Skip1970 is offline
Semper Fi MOFO!
 
Join Date: Nov 2008
Location: Alaska #1
Posts: 10,443
Skip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputation
thronsonskip
yes it does look stupid but in a pinch, it works..

__________________
7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
Reply With Quote
  #11  
Old 08-07-2009, 05:21 PM
atomicjoe23 atomicjoe23 is offline
Senior User
 
Join Date: Mar 2008
Location: Silverdale, WA
Posts: 371
atomicjoe23 is starting off with a positive reputation.
Hey. . .I hear you on the "in a pinch"!!!

Thanks for the tip on the hundredths!
__________________
1979 F-150 4x4--351M/Auto
Reply With Quote
  #12  
Old 08-07-2009, 05:29 PM
Skip1970's Avatar
Skip1970 Skip1970 is offline
Semper Fi MOFO!
 
Join Date: Nov 2008
Location: Alaska #1
Posts: 10,443
Skip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputationSkip1970 has a superb reputation
thronsonskip
my pinch was all last winter!! hhehehehe! i still need to swap in the new front axle after i re gear it!
__________________
7.3 powerstop rotors, coated calipers, pads, 6637 filter, FRX, HPX, cobalt gauges, riff raff boots/plenum inserts. alternator 1/30/2012 199226 miles. oil filter, pre&fuel filter 9/2014 226221 Miles.
Reply With Quote
  #13  
Old 08-07-2009, 05:54 PM
phil6608's Avatar
phil6608 phil6608 is offline
Post Fiend
 
Join Date: Jan 2007
Location: Stanton DE
Posts: 18,157
phil6608 has a brilliant futurephil6608 has a brilliant futurephil6608 has a brilliant futurephil6608 has a brilliant futurephil6608 has a brilliant futurephil6608 has a brilliant futurephil6608 has a brilliant futurephil6608 has a brilliant futurephil6608 has a brilliant futurephil6608 has a brilliant futurephil6608 has a brilliant future
Quote:
Originally Posted by atomicjoe23 View Post
I definitely don't want to have two different size tires. . .that would look DUMB!!!

I'm swapping both the front and the rear axles. . .I just wanted to make sure about that before I bought any axles. . .

. . .guess I'll start looking for the D60 front first. . .seems to be a little harder to find so it will probaby be easier to find a rear to match the front than vice versa since I don't want to have to buy gears and set them up in addition to the axle swap
Don't forget,
you need to buy revers cut gears for the front diff and regular for the back!

__________________
( Phil )2003 SuperCrew: JLP Built Lightning block/Stage 3 heads and cams.
L-conversion/Kenne Bell upgrade blower at 16PSI/BTS,4R100 tranny/100 shot nitrous.
594HP/620TQ Without the Nitrous 1.68 60' time/11.76 @ 116.17 with the 100 shot.
Join the the Delaware Chapter, HERE
Reply With Quote
  #14  
Old 08-07-2009, 06:06 PM
atomicjoe23 atomicjoe23 is offline
Senior User
 
Join Date: Mar 2008
Location: Silverdale, WA
Posts: 371
atomicjoe23 is starting off with a positive reputation.
I was good on that, but thanks for the reminder. . .after seeing the price for a D60 front vs. a 14-bolt rear, I'm thinking about doing a front steer conversion on a 14-bolt like they did on Xtreme 4x4. . .
__________________
1979 F-150 4x4--351M/Auto
Reply With Quote
  #15  
Old 08-07-2009, 06:55 PM
85e150six4mtod 85e150six4mtod is offline
Post Fiend
 
Join Date: Apr 2004
Posts: 16,234
85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation85e150six4mtod has a superb reputation
This came up some time back when a feller was balking at the $1200 or so price for a D60 front axle. He was going to convert. IIRC, the "no" comments were 3 or 4 to 1 against.

You got a lathe? Foundry? Broaching tool?

By the time you buy the parts you can't cut/weld/hammer at home, you might as well buy the real thing.

You LIFE depends on that axle. Why try to cut corners for a few bucks?
Reply With Quote
Old 08-07-2009, 06:55 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
What gear ratio do I have? Vin # 73 ford guy 1973 - 1979 F-100 & Larger F-Series Trucks 6 10-28-2012 01:12 PM
Solid axle swap BLK SHP Clutch, Transmission, Differential, Axle & Transfer Case 5 01-17-2011 07:49 PM
Brake conversion 8X6.5 to 8X170mm steves_F350_460 1987 - 1996 F150 & Larger F-Series Trucks 0 08-11-2010 03:38 PM
Axle code checks front, rear, and the VIN too. 78bigunns 1987 - 1996 F150 & Larger F-Series Trucks 9 07-29-2008 04:46 PM
Dana 44 carrier change? TomThrall Clutch, Transmission, Differential, Axle & Transfer Case 3 02-26-2004 07:28 PM


Go Back   Ford Truck Enthusiasts Forums > Misc. > Clutch, Transmission, Differential, Axle & Transfer Case

Tags
1995, 4x4, axle, dont, f150, front, gear, gears, match, matching, ratio, ratios, rear, sized, tires, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up »





All times are GMT -5. The time now is 10:31 PM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup