Drum Brake Size?

wmmccall · 04-05-2012, 01:09 PM

1997 XJ 4.0L, 8.25 rear, 156k miles. The brake shoes have never been replaced. I'm looking up parts and it seems that 9" and 10" hardware kits kits are offered (Rock-auto).

Which one do I get?

I want to replace the whole drum brake to include the drum, basically freshen everything up. Both rear wheels have been soaked in swamp water many times and sometimes left over night in the hole.

Can I take the wheel off and measure across the drum or would I not be able to get an accurate measurement from that?

Daily driver, so I don't want to take everything apart to measure, then retrieve the parts.

Gee oh Dee · 04-05-2012, 01:12 PM

If you take the wheel off the drum should slide right off.

Mike Riner · 04-05-2012, 01:29 PM

My drums have the size stamped on them. Actually it's a "maximum size" but that will tell you if you have 9 or 10" brakes. I believe the stamping is on the inside of the drum.

Sergiobh64 · 04-05-2012, 01:43 PM

If the drums has "fins" it is size 10"

if it is smooth size 9"

RTorrez1 · 04-05-2012, 03:13 PM

Quote:

Originally Posted by Sergiobh64

If the drums has "fins" it is size 10"

if it is smooth size 9"

Exactly right!

wmmccall · 04-05-2012, 03:20 PM

Sounds good. Do you know what the purpose of the fins are? Cooling or something?

RTorrez1 · 04-05-2012, 04:09 PM

If I am not mistaken they are cooling fins. I do know that the 10" drums with the fins came on the XJ's with the police package and the heavy duty tow package.

wmmccall · 04-05-2012, 07:28 PM

Can I switch between the two?

Byro · 04-05-2012, 07:30 PM

If you had a 10" backing plate to go with the drum and hardware.

04-05-2012, 01:12 PM	#2
Gee oh Dee ::CF Moderator:: Garage is empty, add now Join Date: Sep 2010 Location: Milwaukee, WI Posts: 19,733 My Photos 1987 Cherokee Engine: Check Transmission: Check Transfer Case: Check Front Axle: Yep Rear Axle: Yep Tires: On tight enough Lift Specifications: Has one Misc Accessories: Barely has floors	If you take the wheel off the drum should slide right off. __________________ Rest in peace Brian 96_XJ Perrine "Build" thread: http://www.cherokeeforum.com/f46/pro...herokee-58248/ "...To ride a motorcycle well is like making the choice to live in this world and the next simultaneously; It is to carelessly play with hell's devils and God's angels together because anything less would be, to the moto-enthusiast, to do nothing at all..."

04-05-2012, 01:29 PM	#3
Mike Riner Newbie Garage is empty, add now Join Date: Jan 2012 Posts: 5 My Photos Cherokee	Drum brake size My drums have the size stamped on them. Actually it's a "maximum size" but that will tell you if you have 9 or 10" brakes. I believe the stamping is on the inside of the drum.

04-05-2012, 04:09 PM	#7
RTorrez1 CF Veteran Garage is empty, add now Join Date: Sep 2011 Location: Riviera, Texas Posts: 2,257 My Photos 1998 Sport Cherokee Engine: 4.0 Transmission: auto Tires: 30 9.50 15 Lift Specifications: 3" Misc Accessories: K&N Cold air intake.	If I am not mistaken they are cooling fins. I do know that the 10" drums with the fins came on the XJ's with the police package and the heavy duty tow package. __________________ Robert No Info, No Help! I had a real bad and annoying sound come from my passenger seat also. But once I broke up with my girl friend it's a LOT better... ---------------------------------------------------- 1992 XJ 4X4 -- Stolen and found stripped. 1994 XJ 4X4 -- T-Boned By a lady running a red light. 1995 XJ 4X4 -- Rolled over 3 time while off road. 1998 XJ 4X4 -- Still have and going strong

04-05-2012, 07:30 PM	#9
Byro Seasoned Member 1994 Jeep Cherokee Join Date: Sep 2011 Location: Akron/Canton, OH Posts: 308 My Photos 1994 Cherokee Engine: 4.oh Transmission: AW-4 Transfer Case: 231 Front Axle: HP D35 Rear Axle: Ford 9in Tires: 31x10.50 TSL Lift Specifications: Home-brew 3inch Misc Accessories: Custom front bumper and rear tire carrier	If you had a 10" backing plate to go with the drum and hardware. __________________ She'll do a lap!

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04-05-2012, 01:43 PM	#4
Sergiobh64 Newbie Garage is empty, add now Join Date: Jun 2011 Location: New Jersey Posts: 4 My Photos 1995 Cherokee Engine: 4.0 inline 6 highoutput	If the drums has "fins" it is size 10" if it is smooth size 9"

04-05-2012, 03:20 PM	#6
wmmccall Member Garage is empty, add now Join Date: Sep 2010 Location: NW Florida Posts: 109 My Photos 1997 Cherokee Engine: 4.0L 6Cyl, K&N, 62mm TB, Electric Fans, D Neon Injectors, Head gasket needing replaced. Transmission: busted pan AW4, B&M Cooler, Expensive Temp Gauge Transfer Case: leaky NP231 2x rebuild Front Axle: HP Dana 30, Riddler Rear Axle: Chrysler8.25", Riddler Tires: 31" BFG, Pro-comp wheels Lift Specifications: 4.5" RE Superflex, 1 1/2" spacers Misc Accessories: A bunch of "jimmy riggin" and a bunch of mods to the 4.0	Sounds good. Do you know what the purpose of the fins are? Cooling or something?

04-05-2012, 07:28 PM	#8
wmmccall Member Garage is empty, add now Join Date: Sep 2010 Location: NW Florida Posts: 109 My Photos 1997 Cherokee Engine: 4.0L 6Cyl, K&N, 62mm TB, Electric Fans, D Neon Injectors, Head gasket needing replaced. Transmission: busted pan AW4, B&M Cooler, Expensive Temp Gauge Transfer Case: leaky NP231 2x rebuild Front Axle: HP Dana 30, Riddler Rear Axle: Chrysler8.25", Riddler Tires: 31" BFG, Pro-comp wheels Lift Specifications: 4.5" RE Superflex, 1 1/2" spacers Misc Accessories: A bunch of "jimmy riggin" and a bunch of mods to the 4.0	Can I switch between the two?

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