9" Rearend question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

56ClassicTruck · 12-01-2009, 03:15 AM

Hi need help with rear ends how do you no if its a 9" rear?? my nieghbor has a 1992 ford explorer xlt -- and a 1968 F100 and he said I can take what I need, but I didnt no if the rear ends are any good..dose any one know??

sweet70beast · 12-01-2009, 03:47 AM

Here is a link with good pictures.
http://www.kevinstang.com/Ninecase.htm

50adrod · 12-01-2009, 03:05 PM

Quote:

Originally Posted by 56ClassicTruck

Hi need help with rear ends how do you no if its a 9" rear?? my nieghbor has a 1992 ford explorer xlt -- and a 1968 F100 and he said I can take what I need, but I didnt no if the rear ends are any good..dose any one know??

the 68 should be a 9 and the explorer is a 8.8. either are a good choice go with the one in best condition

**LEEVON** · 12-01-2009, 05:53 PM

does the 8.8 in '92 have disc brakes?

56ClassicTruck · 12-01-2009, 10:13 PM

Thanks guys for your reply's good info. know the 92 ford is drum brakes....I wish..
would they be posi can you lift the back and spin tires and till or do you have to look in side???

hotrod 80 · 12-01-2009, 10:36 PM

look at the tags on the diffs . Ford uses a code like 3L55 = 3.55 limited slip . An open diff will have a decimal point instead of the L .

Tri5Nerd · 12-01-2009, 10:36 PM

Quote:

Originally Posted by 56ClassicTruck

Thanks guys for your reply's good info. know the 92 ford is drum brakes....I wish..
would they be posi can you lift the back and spin tires and till or do you have to look in side???

Yes, you can. The wheels need to spin in the same direction for posi.

Tri5

56ClassicTruck · 03-09-2010, 07:41 PM

can any one brake down this rear?

Tri5Nerd · 03-09-2010, 07:49 PM

Quote:

Originally Posted by 56ClassicTruck

can any one brake down this rear?

There is a number that's close to the nut that I can't see, it's not posi or locker, you want to find a tag with a L in the botton line.

Tri5

Smokejohnson · 03-10-2010, 10:26 PM

An easy way to tell if it's a 9" is a socket won't fit on the bottom stud. You have to use a wrench.

Tri5Nerd · 03-11-2010, 01:51 AM

It's a 9" by the numbers on the tag but X.25 is the gear ratio and the 9 refers to 9".

Tri5

addicted2dunes · 03-11-2010, 02:22 AM

It would be 3.25 as the 9" only had one set of gears that ended in .25

sweet70beast · 03-12-2010, 03:30 PM

25 9 is the tooth count. 25 teeth on the ring and 9 on the pinion which equals a 2.78 gears ratio. 25 devided by 9

56ClassicTruck · 03-12-2010, 06:04 PM

Quote:

Originally Posted by sweet70beast

25 9 is the tooth count. 25 teeth on the ring and 9 on the pinion which equals a 2.78 gears ratio. 25 devided by 9

ok thanks guys.

12-01-2009, 03:15 AM	#1
56ClassicTruck Registered User Join Date: Oct 2008 Location: SW,WA Posts: 202	9" Rearend question Hi need help with rear ends how do you no if its a 9" rear?? my nieghbor has a 1992 ford explorer xlt -- and a 1968 F100 and he said I can take what I need, but I didnt no if the rear ends are any good..dose any one know??

12-01-2009, 03:47 AM	#2
sweet70beast Registered User Join Date: Sep 2006 Location: Shelley Idaho Posts: 876	Re: 9" Rearend question Here is a link with good pictures. http://www.kevinstang.com/Ninecase.htm __________________ 1970 Nova 327/T5 (my 1st car) 1971 K-20 350/350/205 (winter DD) 1953 GMC Suburban 1968 Chevy Bel Air 1976 Chev C-10 1972 Skylark (suncoupe) 1 of 3943 made

12-01-2009, 05:53 PM	#4
LEEVON Moderator Join Date: Jul 2006 Location: Ozark, MO Posts: 4,893	Re: 9" Rearend question does the 8.8 in '92 have disc brakes? __________________ '86 GMC C30 Crew ~ '86 C20 Crew ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '74K10 ~ '71 Cheyenne swb ~'50 3100 bagged ~ '80 Wife ~ Late model kids

12-01-2009, 10:13 PM	#5
56ClassicTruck Registered User Join Date: Oct 2008 Location: SW,WA Posts: 202	Re: 9" Rearend question Thanks guys for your reply's good info. know the 92 ford is drum brakes....I wish.. would they be posi can you lift the back and spin tires and till or do you have to look in side???

12-01-2009, 10:36 PM	#6
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	Re: 9" Rearend question look at the tags on the diffs . Ford uses a code like 3L55 = 3.55 limited slip . An open diff will have a decimal point instead of the L . __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583

03-09-2010, 07:41 PM	#8
56ClassicTruck Registered User Join Date: Oct 2008 Location: SW,WA Posts: 202	Re: 9" Rearend question can any one brake down this rear? Attached Images __________________ 1996 Dodge 3500 4x4 1977 F250 Camper specal 4x4 1956 Chevy 3100 truck

03-10-2010, 10:26 PM	#10
Smokejohnson Registered User Join Date: Nov 2007 Location: Manitoba Canada Posts: 111	Re: 9" Rearend question An easy way to tell if it's a 9" is a socket won't fit on the bottom stud. You have to use a wrench.

03-11-2010, 01:51 AM	#11
Tri5Nerd Tripple Five Fanatic Join Date: Sep 2006 Location: USA Posts: 658	Re: 9" Rearend question It's a 9" by the numbers on the tag but X.25 is the gear ratio and the 9 refers to 9". Tri5 __________________ 1955 Chevy Stepside/LS1 drive train http://67-72chevytrucks.com/vboard/s...d.php?t=371513

03-11-2010, 02:22 AM	#12
addicted2dunes Insane In The Membrane Join Date: Jan 2010 Location: Orcutt, CA Posts: 446	Re: 9" Rearend question It would be 3.25 as the 9" only had one set of gears that ended in .25

03-12-2010, 03:30 PM	#13
sweet70beast Registered User Join Date: Sep 2006 Location: Shelley Idaho Posts: 876	Re: 9" Rearend question 25 9 is the tooth count. 25 teeth on the ring and 9 on the pinion which equals a 2.78 gears ratio. 25 devided by 9 __________________ 1970 Nova 327/T5 (my 1st car) 1971 K-20 350/350/205 (winter DD) 1953 GMC Suburban 1968 Chevy Bel Air 1976 Chev C-10 1972 Skylark (suncoupe) 1 of 3943 made



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