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 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 04-12-2006, 11:43 AM   #1
wedgemon
Registered User
 
wedgemon's Avatar
 
Join Date: Jul 2004
Location: Spanish Springs, NV
Posts: 1,171
Cool 85 mph vs. 100 mph Speedo

I've serach this and other forums.

I'd like to know if a 100 mph Speedo will work, correctly, where my 85 mph speedo is now. Will I need to re-gear at the tranny? Or???

Also, is it easy, or possible, to reset the odometer to my cuurent reading?

As always, you're help is greatly appreciated.

- Dave
__________________
2003 Silverado K1500 Z71 - Arrival Blue
1973 K5 Cheyenne Blazer 350/TH350/NP203
Kids Trucks:92 K1500 Blazer 5.7/700R4 4" lift.

RETIRED: 1980 Scottsdale 4x4

Founding Member:
"TILT WHEEL BELLY." Club
wedgemon is offline   Reply With Quote
Old 04-12-2006, 11:48 AM   #2
86 GMG
Registered User
 
Join Date: Apr 2005
Location: Tulsa Oklahoma
Posts: 943
Re: 85 mph vs. 100 mph Speedo

i would assume the tranny gear would need to be changed as well and for the odometer reading it can be changed but a PITA
__________________
square body trucks an addiction or an investment either way they consume all my extra time and money
86 GMG is offline   Reply With Quote
Old 04-12-2006, 11:50 AM   #3
Russell
Professional Grade
 
Russell's Avatar
 
Join Date: May 2003
Location: Fort McMurray, Alberta
Posts: 7,915
Re: 85 mph vs. 100 mph Speedo

The two interchange without any problems. Just unbolt the one, and bolt the new one in to replace it. Only difference is that the 85 mph speedos have an orange ring, and the 100 mph speedos have either a white or blue ring. If you change the gas gauge as well, thats no concern

You can change the odometer reading, but as 86 GMC mentioned, its a pain, lol
__________________
1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)
Russell is offline   Reply With Quote
Old 04-12-2006, 11:51 AM   #4
gn4u2c
Account Suspended
 
gn4u2c's Avatar
 
Join Date: Mar 2003
Location: southern pa
Posts: 698
Re: 85 mph vs. 100 mph Speedo

switch out to a complete older style cluster run hard line for oil pressure( so all match correctly) all you need to know is your tire size, tranny type, and your good. who knows you may be close . I went from 400 to a 700, 10 bolts with 373 to 4.56 in 14 bolt changed to c 50 cluster and was dead on when i went to have it calibrated.
gn4u2c is offline   Reply With Quote
Old 04-12-2006, 12:53 PM   #5
1Ton
Registered User
 
1Ton's Avatar
 
Join Date: Nov 2004
Location: Jamestown NY
Posts: 731
Re: 85 mph vs. 100 mph Speedo

Should work fine.
I have a complete cluster for sale with a 100 mph speedo for sale if your interested make a offer.
http://67-72chevytrucks.com/vboard/s...d.php?t=190687
__________________
Support your local search and rescue team.... GET LOST!
Originally Posted by DURRTY
if some is good
more is better
too much ought to be enough........
1Ton 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 06:04 AM.


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