70 torino 8 inch conv. to 9 inch
Printed From: The Ford Torino Page
Category: Model Specific Forum
Forum Name: 1970-1971 Ford and Mercury
Forum Description: Technical discussion for 1970-1971 Ford and Mercury
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=6428
Printed Date: 26-March-2026 at 1:11PM
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: 70 torino 8 inch conv. to 9 inch
Posted By: Blue71GT
Subject: 70 torino 8 inch conv. to 9 inch
Date Posted: 30-December-2011 at 7:00AM
|
I have a 70 torino w/ 8 inch rear and want to put in 9 inch. Will I need a different driveshaft or does anyone know if it was the same length between the two rear ends? |
Replies:
Posted By: red396
Date Posted: 09-April-2012 at 11:59AM
| i never heard of a 8 inch removable carrier rear end in a torino.i thought they either came in a 9 inch 28 spline or 31 spline |
Posted By: Guests
Date Posted: 09-April-2012 at 1:29PM
|
not sure on the shaft length @red396, yes the 302 cars had 8in rears and look almost identical to a 9in but you ave a wider choice of gear ratio's with aftermarket gears with the 9in. here is an 8in 
here is an 8in in a 73 Gran Torino formal that had a 302    |
Posted By: fordpower
Date Posted: 10-April-2012 at 7:58AM
|
iS THAT WHY i CAN'T FIND ANY LOWER NO THAN 355 FOR AN 8IN ON THE WEB. I would like something like 3.25 for my pinto |
Posted By: Guests
Date Posted: 10-April-2012 at 8:02AM
| ya gears are hard to get for the 8in that is why alot of people swap a 9in in place as the gear selection is endless,well almost but probably 3 times more then 8's |
Posted By: Harris72GTS
Date Posted: 10-April-2012 at 10:22AM
|
Thanks, I never new that 8 in. were in 302's either. ------------- Don '72 GTS fastback '68 Cougar GT '09 Challenger R/T |
Posted By: 73GTS
Date Posted: 01-November-2012 at 8:55AM
|
measure from the end of your trans tail shaft to the pinion yolk before you swap out the rear axle. Measure the same length after the swap. The shaft it self would work for either rear. You may need a new u joint at the worst. If the length is different, depending on how much different would determine whether you need another shaft or not. ------------- Jim |
Posted By: torinojon
Date Posted: 18-March-2013 at 6:18PM
|
hay when you go from a 8 to a 9 you will need a shorter drive shaft. you will need to find a car with the same trans to get the drive shaft from(with a 9).most ford with 302 had 8 rear ends.the rule of thumb is if its a 351 car it will have a 9. this is with the older stuff....torinojon
|
Posted By: 73GTS
Date Posted: 20-March-2013 at 12:30AM
|
You can always have your shaft shortened too ------------- Jim |