How to correct MPH on TH350? - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old Feb 16th, 04, 02:03 PM Thread Starter
 
Join Date: Oct 2003
Posts: 228
Post

I have a 69 Camaro with a TH350 transmission with the small bullet gear it has a 410 gear in the rear and is off about 30 MPH when you are going 50 it is showing 80.Did all 69's have rear axle frame bumpers?They are 3 holes above axle tubes on both sides that i cannot figure what goes there.Could it be exhaust related?
shockers69 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old Feb 16th, 04, 02:11 PM
Senior Tech
Jon
 
Join Date: Dec 2002
Location: back in the Hew-Hess-Hay
Posts: 5,564
Post

Check this guys site out.

http://members.core.com/~faldrich/speedo.htm

Might help you.

Jon N

The only reason someone would want insurance is if they want to pay someone elses bills or want someone else to pay their bills.
dyno jonn is offline  
post #3 of 4 (permalink) Old Feb 16th, 04, 03:45 PM
Senior Tech
 
Join Date: Apr 2003
Location: Allen, TX
Posts: 2,108
Post

Try these links I've compiled..
Best solution is to find out what your Drive and Driven gears are, will take you less than 10 minutes to do, just remove the speedometer cable from the tail end of the transmission and count the teeth on the driven gear and note the color on the drive gear, then with that info and my links you can compute and figure out the precise gears that will work best for your combination.

Brian's Speedo Links

26" tires:
Drive Gear 7 Driven Gear 22 = +1% off (pretty accurate)
Drive Gear 8 Driven Gear 25 = +2% off (pretty accurate)

27" tires:
Drive Gear 7 Driven Gear 21 = +2% off (pretty accurate)
Drive Gear 8 Driven Gear 25 = -2% off (pretty accurate)

1969 Camaro - GM 2003 Electron Blue
Beck Racing 383 cu in 465HP Engine - Sean Murphy Inductions Stage 2 Quadrajet
TCI Streetfighter 350 - 3.73:1 Posi 10 Bolt Rear - 12.6 sec qtr mile

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
and
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Brian Lewis is offline  
 
post #4 of 4 (permalink) Old Feb 16th, 04, 04:02 PM
Retired
Jim
 
click's Avatar
 
Join Date: Jun 2001
Location: Central Minnesota
Posts: 15,968
Post

There are 3 rubber bumpers above the axle on 69's not sure about other years. One centered over the pumpkin, the others are bolted to the frame as it goes above the axle, the radius part. I got new ones to install this winter now.
[img]graemlins/thumbsup.gif[/img]
Here is a pic of the 3 holes you probably are seeing.

Click..is Jim..former owner of a 69RS-LM1 350/255 - 700r
"There will come a time when you believe everything is finished,
That will be the beginning." Louis L'Amour
click is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome