NP205 speedometer gear housing removal - The 1947 - Present Chevrolet & GMC Truck Message Board Network

webfoot · 10-25-2011, 07:58 PM

I have a new one of these but my 1 1/8" impact socket won't fit in there because of how close it is to the case. Before I waste money on a regular wall 1 1/8" socket will this fit or does it take a special tool?

Also, what is the size of the nut on the output shaft yoke?

Trying to get this thing from dripping gear oil all over my driveway!

'63GENIII · 10-25-2011, 11:19 PM

I think I took a grinder to the part of the socket that hits the yoke. Some would say it weakens the socket which is probably true, but mine hasnt broken yet. Just had to thin out the wall a little to get it to fit in there>

jbclassix · 10-25-2011, 11:48 PM

get a set of chrome Pittsburgh sockets from Harbor Freight. them grind the taper of the end of the socket also. Use one of their coupons too. It's handy for other fittings and things... I have a link below you may find somewhat helpfull

webfoot · 10-26-2011, 12:32 AM

Quote:

Originally Posted by jbclassix

get a set of chrome Pittsburgh sockets from Harbor Freight. them grind the taper of the end of the socket also. Use one of their coupons too. It's handy for other fittings and things... I have a link below you may find somewhat helpfull

I have actually looked at that before and found a lot of useful info. It is threads like this that helped me (successfully) rebuild the M-21 in my GTO. I wish I had time to take the whole thing out and rebuild it. For now I am just going to replace those 2 gaskets and the seal in that housing. I got a craftsman 1 1/8" socket that is pretty thin so I am hoping that will work.

10-25-2011, 07:58 PM	#1
webfoot Registered User Join Date: Nov 2007 Location: Hermiston, OR Posts: 947	NP205 speedometer gear housing removal I have a new one of these but my 1 1/8" impact socket won't fit in there because of how close it is to the case. Before I waste money on a regular wall 1 1/8" socket will this fit or does it take a special tool? Also, what is the size of the nut on the output shaft yoke? Trying to get this thing from dripping gear oil all over my driveway! __________________ *Running in place gets you nowhere fast.* -me 1968 GTO 4-spd covnvertible 1970 K-20 4-speed, factory AC.

10-25-2011, 11:19 PM	#2
'63GENIII Registered User Join Date: Sep 2008 Location: San Carlos, Ca. Posts: 3,048	Re: NP205 speedometer gear housing removal I think I took a grinder to the part of the socket that hits the yoke. Some would say it weakens the socket which is probably true, but mine hasnt broken yet. Just had to thin out the wall a little to get it to fit in there> __________________ Chris '63 k15 long step Vortec 7.4 - L29 Blackbear tune, Five 0 Motorsports injectors, Chris Straub Cam, NV4500, divorced 205 52" front and 63" rear spring swap D44 / 14bff - disc axles Milemarker 9K and 10.5K hydraulic winches 63" & B52 Spring Install http://67-72chevytrucks.com/vboard/s...ng+swap+thread NV4500 Reverse Build Thread http://67-72chevytrucks.com/vboard/s...=reverse+build L29 - 7.4 Vortec Build http://67-72chevytrucks.com/vboard/s...&highlight=L29

10-25-2011, 11:48 PM	#3
jbclassix Junk Yartist Join Date: Jul 2009 Location: Greeley, CO Posts: 2,203	Re: NP205 speedometer gear housing removal get a set of chrome Pittsburgh sockets from Harbor Freight. them grind the taper of the end of the socket also. Use one of their coupons too. It's handy for other fittings and things... I have a link below you may find somewhat helpfull __________________ -Jeremy YOU ONLY FAIL IF YOU STOP TRYING 70 Crew Cab Build Link 70 GMC Suburban 4X4 build thread 95 Yukon Daily Driver Rebuilding an NP205

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