Pilot Bushing for SM 465 Clutch - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Madbomber88 · 04-12-2004, 07:49 AM

Hopefully my last question with this clutch install. Does this application (71 CST Blazer) require a pilot bushing? It came with the clutch, but there is no mention of it in any of the manuals. Only in the directions of the clutch kit itself does it say "if your vehicle requires a pilot bushing..."
Thanks again
-Tim

71 CST Blazer

skid · 04-12-2004, 11:57 AM

You'll need one. Goes in the back of the crankshaft and aligns your transmission input shaft to the crank. Your old one is probably there but should be replaced.

Madbomber88 · 04-12-2004, 12:21 PM

Ok thanks for the reply. So the bushing slides over the end of the transmission output shaft? I couldn't find the old one, does that mean it still on the engine block side?
I just can't find any info on the installation for this, and chiltons and Haynes don't mention it at all

skid · 04-12-2004, 12:34 PM

It will be sitting in the back of your crankshaft. They are hard to get out. If you re-use the old one, re-lubricate it with some high temperature grease (not too much though).

Madbomber88 · 04-12-2004, 12:39 PM

Best way to get it out simply with something long and skinny to stick in there and pull it out? Is the proper installation to pit it in there with the crankshaft, or rather to pit it on the output shaft and then stick it all in together?

skid · 04-12-2004, 12:43 PM

I use a internal bearing puller to remove it with a slide hammer. To install, use a socket that is the same size as the bearing, and drive it in the crank with a hammer.

Madbomber88 · 04-12-2004, 12:49 PM

Sounds pretty involved. Is it a really bad idea to reuse the old one?

skid · 04-12-2004, 12:52 PM

Depends on how much it is worn. In my opinion, I would change it. It will make a big difference in shift quality and transmission operation. I posted some pics on the clutch fork, did you see them?

Madbomber88 · 04-12-2004, 01:00 PM

Yes, thank you very much, I went ahead and ordered a new fork from LMC so then I'll know I have the right one with the right clip.
I appreciate the pics. Just have to figure out how to get that bushing out.

SS55 · 04-13-2004, 01:35 AM

I have had good luck removing stubborn pilot bushings by first filling the bore of the bushing with wheel bearing grease. Then using a drift punch or a 1/2" drive extension, hammer the grease towards the crankshaft which will hydraulically force the bushing out. Of course, the the drift punch needs to be just slightly smaller diameter than the bore of the bushing.

As Skid mentioned above, a small internal bearing puller is the tool for job.

You should put in the new bushing, IMO.

Darrell

04-12-2004, 07:49 AM	#1
Madbomber88 Active Member Join Date: Mar 2004 Location: Virginia Posts: 169	Pilot Bushing for SM 465 Clutch Hopefully my last question with this clutch install. Does this application (71 CST Blazer) require a pilot bushing? It came with the clutch, but there is no mention of it in any of the manuals. Only in the directions of the clutch kit itself does it say "if your vehicle requires a pilot bushing..." Thanks again -Tim 71 CST Blazer __________________ 71 Blazer CST 72 K20 Capt USAF

04-12-2004, 11:57 AM	#2
skid Registered User Join Date: Dec 2003 Location: Left Coast Posts: 254	You'll need one. Goes in the back of the crankshaft and aligns your transmission input shaft to the crank. Your old one is probably there but should be replaced. __________________ Toys: 72 K5 Blazer 74 Vette

04-12-2004, 12:21 PM	#3
Madbomber88 Active Member Join Date: Mar 2004 Location: Virginia Posts: 169	Ok thanks for the reply. So the bushing slides over the end of the transmission output shaft? I couldn't find the old one, does that mean it still on the engine block side? I just can't find any info on the installation for this, and chiltons and Haynes don't mention it at all __________________ 71 Blazer CST 72 K20 Capt USAF

04-12-2004, 12:34 PM	#4
skid Registered User Join Date: Dec 2003 Location: Left Coast Posts: 254	It will be sitting in the back of your crankshaft. They are hard to get out. If you re-use the old one, re-lubricate it with some high temperature grease (not too much though). __________________ Toys: 72 K5 Blazer 74 Vette

04-12-2004, 12:39 PM	#5
Madbomber88 Active Member Join Date: Mar 2004 Location: Virginia Posts: 169	Best way to get it out simply with something long and skinny to stick in there and pull it out? Is the proper installation to pit it in there with the crankshaft, or rather to pit it on the output shaft and then stick it all in together? __________________ 71 Blazer CST 72 K20 Capt USAF

04-12-2004, 12:43 PM	#6
skid Registered User Join Date: Dec 2003 Location: Left Coast Posts: 254	I use a internal bearing puller to remove it with a slide hammer. To install, use a socket that is the same size as the bearing, and drive it in the crank with a hammer. __________________ Toys: 72 K5 Blazer 74 Vette

04-12-2004, 12:49 PM	#7
Madbomber88 Active Member Join Date: Mar 2004 Location: Virginia Posts: 169	Sounds pretty involved. Is it a really bad idea to reuse the old one? __________________ 71 Blazer CST 72 K20 Capt USAF

04-12-2004, 12:52 PM	#8
skid Registered User Join Date: Dec 2003 Location: Left Coast Posts: 254	Depends on how much it is worn. In my opinion, I would change it. It will make a big difference in shift quality and transmission operation. I posted some pics on the clutch fork, did you see them? __________________ Toys: 72 K5 Blazer 74 Vette

04-12-2004, 01:00 PM	#9
Madbomber88 Active Member Join Date: Mar 2004 Location: Virginia Posts: 169	Yes, thank you very much, I went ahead and ordered a new fork from LMC so then I'll know I have the right one with the right clip. I appreciate the pics. Just have to figure out how to get that bushing out. __________________ 71 Blazer CST 72 K20 Capt USAF

04-13-2004, 01:35 AM	#10
SS55 Registered User Join Date: Nov 2003 Location: San Diego, CA Posts: 62	I have had good luck removing stubborn pilot bushings by first filling the bore of the bushing with wheel bearing grease. Then using a drift punch or a 1/2" drive extension, hammer the grease towards the crankshaft which will hydraulically force the bushing out. Of course, the the drift punch needs to be just slightly smaller diameter than the bore of the bushing. As Skid mentioned above, a small internal bearing puller is the tool for job. You should put in the new bushing, IMO. Darrell __________________ Be wary of the light at the end of the tunnel....It might be a gorilla holding a flashlight! 71 Blazer, ex-4WD...Bought it that way 55 GMC 55 Belair 2dr HT 67 El Camino



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