speedo gear ??- Experts help!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**JQ-72** · 10-25-2006, 06:31 PM

I need to know what speedometer gear (what number of teeth) is used with a TH400 and 3.08 gears. Someone told me that the internal drive gear is the same on all TH400's, but the speedo gear varies depending on application. Someone please help before I get a speeding ticket!!!
Joshua

**LockDoc** · 10-25-2006, 07:27 PM

Joshua,

This thread might help.

http://67-72chevytrucks.com/vboard/s...eedometer+gear

LockDoc

**JQ-72** · 10-26-2006, 07:20 PM

Brad, I'm interested. What was this gear removed from? Thanks
JQ

jimfulco · 10-29-2006, 01:25 AM

http://novaresource.org/speedo.htm might help you.

glock35ipsc · 10-29-2006, 01:46 AM

Here's another good one:

http://www.tciauto.com/Products/Tech...eedo_gears.asp

skokie · 10-29-2006, 02:11 AM

Im running a 308 with a 400 as well. Tires are 29.5 in diameter and I have a 17 drive gear and a 39 driven gear.
Check the following sites
http://www.700r4.com/speedoCalc/speedocalc.shtml
http://www.bgsoflex.com/speedo1.html

10-25-2006, 06:31 PM	#1
JQ-72 Senior Member Join Date: Feb 2001 Location: Killen, Alabama USA Posts: 3,628	speedo gear ??- Experts help!! I need to know what speedometer gear (what number of teeth) is used with a TH400 and 3.08 gears. Someone told me that the internal drive gear is the same on all TH400's, but the speedo gear varies depending on application. Someone please help before I get a speeding ticket!!! Joshua

10-25-2006, 07:27 PM	#2
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,818	Re: speedo gear ??- Experts help!! Joshua, This thread might help. http://67-72chevytrucks.com/vboard/s...eedometer+gear LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

10-26-2006, 07:20 PM	#3
JQ-72 Senior Member Join Date: Feb 2001 Location: Killen, Alabama USA Posts: 3,628	Re: speedo gear ??- Experts help!! Brad, I'm interested. What was this gear removed from? Thanks JQ

10-29-2006, 01:25 AM	#4
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	Re: speedo gear ??- Experts help!! http://novaresource.org/speedo.htm might help you.

10-29-2006, 01:46 AM	#5
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,684	Re: speedo gear ??- Experts help!! Here's another good one: http://www.tciauto.com/Products/Tech...eedo_gears.asp __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE

10-29-2006, 02:11 AM	#6
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	Re: speedo gear ??- Experts help!! Im running a 308 with a 400 as well. Tires are 29.5 in diameter and I have a 17 drive gear and a 39 driven gear. Check the following sites http://www.700r4.com/speedoCalc/speedocalc.shtml http://www.bgsoflex.com/speedo1.html __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234 Last edited by skokie; 10-29-2006 at 02:11 AM.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.