GM 8.5 ten bolt crush sleeve

MikeMoller · 03-03-2015, 08:53 AM

Curious what crush sleeve styles everyone uses/likes for a GM 8.5 10 bolt.
1. Stock type - tough to crush(who makes the best)
2. Ratech Smart Sleeve- seems a better design easier to crush: http://www.ratechmfg.com/smart%20sleeve.htm
3. Solid sleeve/spacer with shims(who makes the best)
4. Other?

Thanks

SSDiv6 · 03-03-2015, 11:33 AM

Go with solid.
Ratech and Yukon gear sells the kit.
They also have them in Ebay.

http://www.ebay.com/itm/GM-8-5-Solid...315060&vxp=mtr

HandOverFist · 03-03-2015, 01:21 PM

Swapped to the Ratech smart sleeve last year in our 12-bolt...still going strong.

Patric Fox · 03-03-2015, 01:31 PM

I would personally go with a solid spacer. After trying to crush a 8 3/4" sleeve, and torqued to 450 ft. lbs. , it pulled the threads out of the pinion nut, and still did not have enough preload.

HandOverFist · 03-03-2015, 01:41 PM

Quote:

Originally Posted by Patric Fox

I would personally go with a solid spacer. After trying to crush a 8 3/4" sleeve, and torqued to 450 ft. lbs. , it pulled the threads out of the pinion nut, and still did not have enough preload.

Give the smart sleeve a go...around 150 ft lb and you are done.

SSDiv6 · 03-03-2015, 05:37 PM

The issue I see with the smart sleeve is that it still crushes and will do so with less torque applied.
In a drag race application, with the shock and loads applied to the pinion during launch, especially with a heavy car, the solid spacer is the only way to go.

03-03-2015, 08:53 AM	#1
MikeMoller Senior Member Join Date: May 2010 Location: Raleigh NC Posts: 635 Likes: 27 Liked 254 Times in 78 Posts	GM 8.5 ten bolt crush sleeve Curious what crush sleeve styles everyone uses/likes for a GM 8.5 10 bolt. 1. Stock type - tough to crush(who makes the best) 2. Ratech Smart Sleeve- seems a better design easier to crush: http://www.ratechmfg.com/smart%20sleeve.htm 3. Solid sleeve/spacer with shims(who makes the best) 4. Other? Thanks __________________ Mike Moller NHRA 203 Q-R-T/SA

03-03-2015, 11:33 AM	#2
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,023 Likes: 706 Liked 1,514 Times in 563 Posts	Re: GM 8.5 ten bolt crush sleeve Go with solid. Ratech and Yukon gear sells the kit. They also have them in Ebay. http://www.ebay.com/itm/GM-8-5-Solid...315060&vxp=mtr

03-03-2015, 01:21 PM	#3
HandOverFist VIP Member Join Date: Oct 2013 Location: Gulf Breeze, FL Posts: 1,651 Likes: 8 Liked 33 Times in 16 Posts	Re: GM 8.5 ten bolt crush sleeve Swapped to the Ratech smart sleeve last year in our 12-bolt...still going strong. __________________ Rich Taylor I/SA - 321

03-03-2015, 01:31 PM	#4
Patric Fox Member Join Date: Jul 2007 Location: Pottstown,Pa. Posts: 121 Likes: 24 Liked 11 Times in 8 Posts	Re: GM 8.5 ten bolt crush sleeve I would personally go with a solid spacer. After trying to crush a 8 3/4" sleeve, and torqued to 450 ft. lbs. , it pulled the threads out of the pinion nut, and still did not have enough preload.

03-03-2015, 05:37 PM	#6
SSDiv6 VIP Member Join Date: Feb 2003 Location: Glendale, Arizona Posts: 3,023 Likes: 706 Liked 1,514 Times in 563 Posts	Re: GM 8.5 ten bolt crush sleeve The issue I see with the smart sleeve is that it still crushes and will do so with less torque applied. In a drag race application, with the shock and loads applied to the pinion during launch, especially with a heavy car, the solid spacer is the only way to go.

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