3.55 gears - Mustang Evolution

Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > Classic Mustangs



Reply
 
Thread Tools Search this Thread
Please support our sponsors and let them know you heard about them here!
Old 05-09-2012, 08:47 PM   #1
Registered Member
Regular
 
6t7mstg's Avatar
 
Join Date: May 2012
Region: North Dakota
Posts: 37
3.55 gears

Hello guys, I'm new to the forum and was wondering what gears you guys are running in the rearend. I have a 67 coupe with an I6 200 and 3spd manual with 2.79's in there now. Thinking about 3.55's, will that give me much more punch?
6t7mstg is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 05-10-2012, 05:56 PM   #2
Registered Member
Commercial Member
Regular
 
matcox83's Avatar
 
Join Date: Aug 2011
Location: Shelby Twp
Region: Michigan
Posts: 509
My 66 6 cyl was originally a 3 speed but I swapped in a C4. Original gear was 3.20 with open diff. If you still have the 7.5" axle, you don't really have any choices. More importantly if you go too low (high number) your rpm on the highway will be too high. My opinion is 3.20 would be the lowest ratio to go with unless you do a T5 swap. Hope that makes sense and helps.

---------- Post added at 06:56 PM ---------- Previous post was at 06:52 PM ----------

It would give better acceleration but highway RPM would go too high. If you still have 7.5" rear end though you can't find a gear. Gotta swap to 8" to change gear.
matcox83 is offline   Reply With Quote
Old 05-10-2012, 07:15 PM   #3
Registered Member
Regular
 
6t7mstg's Avatar
 
Join Date: May 2012
Region: North Dakota
Posts: 37
Thanks, that is exactly the kind of info I was looking for. I did swap out the 7.5 rearend for an 8, thats why I have the 2.79. I will go with the 3.20's, thanks for your help.
6t7mstg is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 05-25-2012, 06:47 PM   #4
Registered Member
Regular
 
Sainte's Avatar
 
Join Date: Apr 2012
Region: New Jersey
Posts: 44
I had an I6 with the 7.5" 2.80 rear. At 60 mph it sounded like it was going to explode!

I am dropping a 289 in it currently along with an 8" 3.55 rear. A LOT more work than I anticipated swapping a V8 into the I6 body!

Oh, almost forgot, I junked the three speed transmission and I am dropping a T5 in it from a 94 Cobra. I had to replace the input shaft and bearing housing in order to use the 93 5.0 bell housing so I didnt have to use the adapter plate.
Sainte is offline   Reply With Quote
Old 05-29-2012, 11:56 AM   #5
Registered Member
Regular
 
6t7mstg's Avatar
 
Join Date: May 2012
Region: North Dakota
Posts: 37
With my I6 and 2.79 rearend, it feels like I'm starting out in 2nd instead of 1st. I also have larger than stock tires too, so I think that makes a difference on the gearing.
6t7mstg is offline   Reply With Quote
Reply

Lower Navigation
Go Back   Mustang Evolution > 4 Cylinder | V6 | Classic Mustangs || Tech and Talk > Classic Mustangs

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are On
Refbacks are Off


» Like Us On Facebook



09:07 PM


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0

MustangEvolution.com is in no way associated with or endorsed by Ford Motor Company.