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

'63GENIII · 08-25-2013, 11:12 PM

I just swapped out the T221 for divorced mount 205 in my '63. I have the mounting issues, driveline modifications finished as of today. I have exhaust to reroute, shifter design and speedometer to finish. I thought that the speedometer connection was going to be the easiest part but found out today that I couldn't be more wrong. I noticed early on that the steel "driven gear" that screws into the tail section of the Dodge 205 was missing and really didn't give it a second thought. Well today after I finished putting the gear lube in, I decided to look online for the driven gear thinking that GM, Dodge and Ferd all used the same one. Epic fail. It appears that the Ferd is a slip in style with a retainer bolt, I haven't seen the GM style yet and the Dodge is a screw in steel type which hasn't been made for a while and even used is tough to find. I guess I could possibly swap out the tail housing for a GM style and have better parts availability but I wanted to get some opinions and maybe even some pics of the GM ones that some of you have. Or better yet, if anyone has a Dodge style driven gear in good shape, I'd love to hear from you. Thanks for any advice you can lend. Chris

'63GENIII · 08-26-2013, 04:56 PM

Maybe I should post on a Dodge site? Anyone have a link to a good one?
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dieseldude4bt · 08-26-2013, 09:15 PM

Chevy is a screw in steel type also, if I understand what you are looking for.

**argonaut** · 08-26-2013, 10:47 PM

I would have thought them to be the same as well. If I remember correctly the speedo gear in my 205s is very similar to my 221. Although I'm not familiar with the dodge units. Would the one from your 221 fit into your dodge 205? (I'm sure you've already tried that)

Pics of the dodge?
Posted via Mobile Device

unclefreddy · 09-15-2013, 01:11 AM

Try these guys , maybe they can help http://www.transmissioncenter.net/sp...n_______va.htm

08-25-2013, 11:12 PM	#1
'63GENIII Registered User Join Date: Sep 2008 Location: San Carlos, Ca. Posts: 3,048	NP205 speedometer gear interchangeability I just swapped out the T221 for divorced mount 205 in my '63. I have the mounting issues, driveline modifications finished as of today. I have exhaust to reroute, shifter design and speedometer to finish. I thought that the speedometer connection was going to be the easiest part but found out today that I couldn't be more wrong. I noticed early on that the steel "driven gear" that screws into the tail section of the Dodge 205 was missing and really didn't give it a second thought. Well today after I finished putting the gear lube in, I decided to look online for the driven gear thinking that GM, Dodge and Ferd all used the same one. Epic fail. It appears that the Ferd is a slip in style with a retainer bolt, I haven't seen the GM style yet and the Dodge is a screw in steel type which hasn't been made for a while and even used is tough to find. I guess I could possibly swap out the tail housing for a GM style and have better parts availability but I wanted to get some opinions and maybe even some pics of the GM ones that some of you have. Or better yet, if anyone has a Dodge style driven gear in good shape, I'd love to hear from you. Thanks for any advice you can lend. Chris __________________ 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

08-26-2013, 04:56 PM	#2
'63GENIII Registered User Join Date: Sep 2008 Location: San Carlos, Ca. Posts: 3,048	Re: NP205 speedometer gear interchangeability Maybe I should post on a Dodge site? Anyone have a link to a good one? Posted via Mobile Device __________________ 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

08-26-2013, 09:15 PM	#3
dieseldude4bt Registered User Join Date: Mar 2011 Location: Co Posts: 412	Re: NP205 speedometer gear interchangeability Chevy is a screw in steel type also, if I understand what you are looking for. __________________ 63 k20 with cummins 4bt, owned sence 1982

08-26-2013, 10:47 PM	#4
argonaut Senior Member Join Date: Aug 2008 Location: Long Beach, CA Posts: 1,813	Re: NP205 speedometer gear interchangeability I would have thought them to be the same as well. If I remember correctly the speedo gear in my 205s is very similar to my 221. Although I'm not familiar with the dodge units. Would the one from your 221 fit into your dodge 205? (I'm sure you've already tried that) Pics of the dodge? Posted via Mobile Device __________________ Jason M. @argonaut62 1972 K5 Blazer CST, Turquoise 1966 K20 Short Fleet Pickup, Big Ugly 1964 C10 Short Fleet, Gertrude 2001 Porsche 911 Carrera 1996 Ford Bronco XLT 1980 Jeep Wagoneer 2008 Honda CBR1000RR 2005 Honda RC51 1981 Honda CB750C No dis-assemble Johnny Five! No dis-assemble!

09-15-2013, 01:11 AM	#5
unclefreddy Registered User Join Date: Jun 2013 Location: ukiah, california Posts: 333	Re: NP205 speedometer gear interchangeability Try these guys , maybe they can help http://www.transmissioncenter.net/sp...n_______va.htm

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