The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1960 - 1966 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-08-2015, 08:11 PM   #1
2mas
Registered User
 
Join Date: Jun 2011
Location: Sweden
Posts: 126
Duramax swap - Rear axle gear in c10?

Hi,
I'm doing a Duramax swap into my 65 c10.
Now I need to program the ECM to get the speedometer to show the right values.
I've been looking at old threads on gears. My 65 C10 had a V8 auto. Do you know what gear it has in the rear end?

I can read HA0415W on the axle, but I cannot find anything on it.
When turning the drive shaft 2 revolutions the wheel rotates almost one turn (one wheel in the air)

/Thomas
__________________
1965 c10 BBW LWB - Duramax
2010 Camaro SS - Whipple (721hp)
2017 Volvo V60 diesel-hybrid (233hp)
2008 volvo XC70 diesel

http://67-72chevytrucks.com/vboard/s...d.php?t=677577
2mas is offline   Reply With Quote
Old 11-08-2015, 08:37 PM   #2
jdl71
Registered User
 
jdl71's Avatar
 
Join Date: Oct 2012
Location: Eldon, MO
Posts: 1,753
Re: Duramax swap - Rear axle gear in c10?

The ratio is stamped on the ring gear. Remove the cover and have a look if you want to know for sure, but probably 3:73.
__________________
Psalm 23


64 C10

66 K20
jdl71 is offline   Reply With Quote
Old 11-09-2015, 08:04 PM   #3
61_FL_Apache
Who Me?
 
61_FL_Apache's Avatar
 
Join Date: Sep 2010
Location: Royal Palm Beach, FL
Posts: 4,067
Re: Duramax swap - Rear axle gear in c10?

Quote:
Originally Posted by jdl71 View Post
The ratio is stamped on the ring gear. Remove the cover and have a look if you want to know for sure, but probably 3:73.
This way is for sure! I found out this way I had a 1967 3:08 gear.
__________________
Steve

1997 Tahoe LT 4D 2WD (DD)
2001 Blazer 4D 2WD
1961 Apache 10 (sold)
1965 C10 Stepper (sold)
61_FL_Apache is offline   Reply With Quote
Old 11-09-2015, 12:19 AM   #4
CHIZZLER
SAVING ONE TRUCK AT A TIME
 
CHIZZLER's Avatar
 
Join Date: Feb 2010
Location: sherwood oregon
Posts: 1,141
Re: Duramax swap - Rear axle gear in c10?

Do you have any pics of your build?
__________________
53-suburban (99% done)
40-pick up (99.9% done)
12-cc lb dually D-max (dd)
61-crew cab D-max

"PAY LESS FOR WHAT YOU NEED PAY MORE FOR WHAT YOU WANT"

53 BURBAN BARN FIND:http://67-72chevytrucks.com/vboard/s...d.php?t=404091

1940 PROJECT MOON SHINE:http://67-72chevytrucks.com/vboard/s...d.php?t=551088

1961 CREW MAX: http://67-72chevytrucks.com/vboard/s....php?p=6957999
CHIZZLER is offline   Reply With Quote
Old 11-09-2015, 04:55 PM   #5
TJ's Chevy
Registered User
 
TJ's Chevy's Avatar
 
Join Date: Mar 2013
Location: Southern Oregon
Posts: 10,384
Re: Duramax swap - Rear axle gear in c10?

Common gearing for C10's was 3.73.
__________________
1966 Chevy C10 "Project Two Tone" http://67-72chevytrucks.com/vboard/s...d.php?t=596643
1964 GMC "Crustine" semi-build:http://67-72chevytrucks.com/vboard/s...d.php?t=665056
My youtube channel. Username "Military Chevy": https://www.youtube.com/channel/UC_h...fzpcUXyK_5-uiw
TJ's Chevy is offline   Reply With Quote
Old 11-09-2015, 10:06 PM   #6
2mas
Registered User
 
Join Date: Jun 2011
Location: Sweden
Posts: 126
Re: Duramax swap - Rear axle gear in c10?

Added link to my build thread in my signature.
/Thomas
__________________
1965 c10 BBW LWB - Duramax
2010 Camaro SS - Whipple (721hp)
2017 Volvo V60 diesel-hybrid (233hp)
2008 volvo XC70 diesel

http://67-72chevytrucks.com/vboard/s...d.php?t=677577
2mas is offline   Reply With Quote
Old 03-01-2024, 12:14 PM   #7
Dan Castilleja
Junior Member
 
Join Date: Apr 2012
Location: SF SD
Posts: 63
Re: Duramax swap - Rear axle gear in c10?

What motor mount kit did you use?
Dan Castilleja is offline   Reply With Quote
Old 03-01-2024, 01:12 PM   #8
bigmoe
Registered User
 
bigmoe's Avatar
 
Join Date: Oct 2014
Location: Brandon, Manitoba, Canada
Posts: 995
Re: Duramax swap - Rear axle gear in c10?

Quote:
Originally Posted by 2mas View Post
Hi,
I'm doing a Duramax swap into my 65 c10.
Now I need to program the ECM to get the speedometer to show the right values.
I've been looking at old threads on gears. My 65 C10 had a V8 auto. Do you know what gear it has in the rear end?

I can read HA0415W on the axle, but I cannot find anything on it.
When turning the drive shaft 2 revolutions the wheel rotates almost one turn (one wheel in the air)

/Thomas
Spin the wheel around TWO times and count the driveshaft revolutions.
bigmoe is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 11:59 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com