Reusing Part of a Single Disk Clutch - Competition Diesel.Com

Red Sleeper · 04-12-2018, 07:10 AM

Working on a 98 12v 5spd 4wd truck that broke the input shaft. Owner bought the truck with a SouthBend single disk clutch already installed around 90k miles, truck now has 220k miles. All highway driving mind you.

I know the flywheel is warped just by running my hand over the clutch mating surface, which is blue in color from heat. However, the clutch disk appears to be just fine with plenty of material left. The pressure plate also felt fine via the clutch petal inside the truck. Not sure how or what to visually inspect on the pressure plate.

Questions: Do all single disk pressure plates share the same bolt pattern to a 13" flywheel? SouthBend wants $350 and Valair is $230 for a flywheel. Valair is not sure about the bolt pattern being the same. I am waiting for the owner to measure existing SouthBend flywheel so Valair can verify fitment.
Am I safe with reusing this pressure plate and clutch if all was working perfectly before?
Will be replacing the throw out bearing, input shaft, and input shaft retainer housing also. Truck has upgraded hydraulics. Owner is on a budget.

95cummins5.9 · 04-12-2018, 07:16 AM

You can have a machine shop surface the old flywheel. To my knowledge a 13" flywheel is a 13" flywheel besides the pilot bearing being a roller bearing on the sb and valar. Napa would have a 13" flywheel with 12 1/4 and 13" mounting holes just a needle bearing pilot.
They both originated from a luk brand clutch.

Red Sleeper · 04-12-2018, 09:32 AM

I have not had luck with facing a flywheel in the past. And would also like to keep with the roller bearing for the pilot.

I agree with you that it should bolt up, just asking if someone else has maybe done this before.

*Valair1* · 04-12-2018, 09:53 AM

Flywheels are same bolt pattern

Red Sleeper · 04-12-2018, 12:49 PM

Quote:

Originally Posted by Valair1

Flywheels are same bolt pattern

Thank you very much. Will be calling your office to place an order.

Red Sleeper · 04-24-2018, 07:53 AM

We used the Valair flywheel with SouthBend single disk clutch and pressure plate. All worked great together.

I received the flywheel from Valair very quickly!

04-12-2018, 07:10 AM	#1
Red Sleeper Name: Red Sleeper Title: Too Much Time Status: Not Here Join Date: Aug 2009 Location: Lone Star State Member`s Gallery Posts: 4,597	Reusing Part of a Single Disk Clutch Working on a 98 12v 5spd 4wd truck that broke the input shaft. Owner bought the truck with a SouthBend single disk clutch already installed around 90k miles, truck now has 220k miles. All highway driving mind you. I know the flywheel is warped just by running my hand over the clutch mating surface, which is blue in color from heat. However, the clutch disk appears to be just fine with plenty of material left. The pressure plate also felt fine via the clutch petal inside the truck. Not sure how or what to visually inspect on the pressure plate. Questions: Do all single disk pressure plates share the same bolt pattern to a 13" flywheel? SouthBend wants $350 and Valair is $230 for a flywheel. Valair is not sure about the bolt pattern being the same. I am waiting for the owner to measure existing SouthBend flywheel so Valair can verify fitment. Am I safe with reusing this pressure plate and clutch if all was working perfectly before? Will be replacing the throw out bearing, input shaft, and input shaft retainer housing also. Truck has upgraded hydraulics. Owner is on a budget. __________________ Nick J '14 Silverado LTZ 5.3 4wd '05 Cummins QCSB 4wd 48re '91 Cummins w350 5spd Last edited by Red Sleeper; 04-12-2018 at 07:12 AM.

04-12-2018, 07:16 AM	#2
95cummins5.9 Name: 95cummins5.9 Title: Old man *** gossiper Status: Not Here Join Date: Jun 2012 Location: U.S.A Member`s Gallery Posts:** 4,720	You can have a machine shop surface the old flywheel. To my knowledge a 13" flywheel is a 13" flywheel besides the pilot bearing being a roller bearing on the sb and valar. Napa would have a 13" flywheel with 12 1/4 and 13" mounting holes just a needle bearing pilot. They both originated from a luk brand clutch. Last edited by 95cummins5.9; 04-12-2018 at 07:17 AM.

04-12-2018, 09:32 AM	#3
Red Sleeper Name: Red Sleeper Title: Too Much Time Status: Not Here Join Date: Aug 2009 Location: Lone Star State Member`s Gallery Posts: 4,597	I have not had luck with facing a flywheel in the past. And would also like to keep with the roller bearing for the pilot. I agree with you that it should bolt up, just asking if someone else has maybe done this before. __________________ Nick J '14 Silverado LTZ 5.3 4wd '05 Cummins QCSB 4wd 48re '91 Cummins w350 5spd

04-12-2018, 09:53 AM	#4
Valair1 Name: Valair1 Title: Valair Inc. Clutch Status: Not Here Join Date: Jul 2008 Location: Crowley Texas Member`s Gallery Posts: 2,498	Flywheels are same bolt pattern __________________ 97 4x4 *"The Farm Truck"* 13 4x4 CCSB Laramie 15 4x4 CCDRW Valair Performance Series Clutches

04-24-2018, 07:53 AM	#6
Red Sleeper Name: Red Sleeper Title: Too Much Time Status: Not Here Join Date: Aug 2009 Location: Lone Star State Member`s Gallery Posts: 4,597	We used the Valair flywheel with SouthBend single disk clutch and pressure plate. All worked great together. I received the flywheel from Valair very quickly! __________________ Nick J '14 Silverado LTZ 5.3 4wd '05 Cummins QCSB 4wd 48re '91 Cummins w350 5spd