Name this part? Also, speedo questions (not the underwear) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

shifty · 03-23-2005, 03:22 PM

What is the name of the gear inside the tranny that your speedo cable hooks up to? I need a new one ...

My truck came with a 60" speedo cable sheath. It seems to be stretched awful tight. Would I have any problems using a longer sheath - like a 66" - with a 66" speedo cable?

**CPNE** · 03-23-2005, 03:33 PM

Speedometer Gear

Your cable is tight because the transmission in your truck was swapped out for a 69-up version. The 67/68 3 speed tranny is shorter. You need to get a cable that will work on the longer tailshaft transmission, Since that tranny is the same length (bellhousing to slip yolk) as the stock TH350 auto tranny, get a used one off a automatic equiped truck, or buy new for that application

shifty · 03-23-2005, 04:06 PM

What kind of parts store sells a speedometer gear? The local Discount Zone stores keep redirecting me to transmission shops. Transmission shops redirect me to the auto parts store. Someone at a tranny shop tried to tell me I was looking for a "spider gear", which I thought was incorrect (hence why I started this thread).

Thanks, yet again CPNE

busterwivell · 03-23-2005, 04:40 PM

I've had them made at the calibration shop. That way, everything is right. Avoids tickets with new toys (well, maybe).

teamroper! · 03-23-2005, 05:33 PM

speedometer driven gear. If your speedometer is correct, remove the gear and take it to a dealership and they should be able to help you out.

**VetteVet** · 03-23-2005, 06:38 PM

I don't know if this will help but check the link

http://images.google.com/imgres?imgu...lr%3D%26sa%3DN

VetteVet

68jimmy · 03-23-2005, 07:39 PM

I've only had luck at the GM dealer obtaining the gears... And they're not out of site, around $7-10$ each... The gear that is attached to the output shaft is the Drive gear and the other is the Driven, which is the one that the speedo cable slips into. To calculate what you need based on your rear axle ratio and tire size use the calculators at:

http://www.tciauto.com/tech_info/speedo_gears.htm

good luck!

shifty · 03-23-2005, 09:04 PM

Thanks, guys! Now I have the pleasure of finding out the gear ratio on the truck, I guess. I honestly have no clue. Just got it. I don't even know how many bolts

03-23-2005, 03:22 PM	#1
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,373	Name this part? Also, speedo questions (not the underwear) What is the name of the gear inside the tranny that your speedo cable hooks up to? I need a new one ... My truck came with a 60" speedo cable sheath. It seems to be stretched awful tight. Would I have any problems using a longer sheath - like a 66" - with a 66" speedo cable? __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

03-23-2005, 03:33 PM	#2
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,662	Speedometer Gear Your cable is tight because the transmission in your truck was swapped out for a 69-up version. The 67/68 3 speed tranny is shorter. You need to get a cable that will work on the longer tailshaft transmission, Since that tranny is the same length (bellhousing to slip yolk) as the stock TH350 auto tranny, get a used one off a automatic equiped truck, or buy new for that application __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

03-23-2005, 04:06 PM	#3
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,373	What kind of parts store sells a speedometer gear? The local Discount Zone stores keep redirecting me to transmission shops. Transmission shops redirect me to the auto parts store. Someone at a tranny shop tried to tell me I was looking for a "spider gear", which I thought was incorrect (hence why I started this thread). Thanks, yet again CPNE __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

03-23-2005, 04:40 PM	#4
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	I've had them made at the calibration shop. That way, everything is right. Avoids tickets with new toys (well, maybe). __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com

03-23-2005, 06:38 PM	#6
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,719	speedometer gears I don't know if this will help but check the link http://images.google.com/imgres?imgu...lr%3D%26sa%3DN VetteVet __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

03-23-2005, 05:33 PM	#5
teamroper! Registered User Join Date: Nov 2003 Location: northeast alabama Posts: 258	speedometer driven gear. If your speedometer is correct, remove the gear and take it to a dealership and they should be able to help you out.

03-23-2005, 07:39 PM	#7
68jimmy Registered User Join Date: Dec 2003 Location: albuquerque Posts: 431	I've only had luck at the GM dealer obtaining the gears... And they're not out of site, around $7-10$ each... The gear that is attached to the output shaft is the Drive gear and the other is the Driven, which is the one that the speedo cable slips into. To calculate what you need based on your rear axle ratio and tire size use the calculators at: http://www.tciauto.com/tech_info/speedo_gears.htm good luck! __________________ 78 C10 LWB Super Cheyenne

03-23-2005, 09:04 PM	#8
shifty Questionable Join Date: Mar 2005 Location: Atlanta Posts: 13,373	Thanks, guys! Now I have the pleasure of finding out the gear ratio on the truck, I guess. I honestly have no clue. Just got it. I don't even know how many bolts __________________ If I've got anything up for grabs, it'll be here: 7-hole gauge cluster for a 67-72 p/u FREE (link) I can't check the forum daily. If I don't reply to you within 24 hours, drop me a PM! I'm (hopefully) still alive and will reply faster to a PM.

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