how to tell fords 7.5 from 8.8 - Hot Rod Forum : Hotrodders Bulletin Board -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 02-22-2005, 12:30 PM
85stangboy's Avatar
New Member
Join Date: Jul 2003
Location: Altoona pa
Posts: 21
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
how to tell fords 7.5 from 8.8

i have a 86 mustang originally a 6cyl now has a 351w and my friends have been telling me that i need to change it to a 8.8 bc it should be a 7.5 for a 6 cyl how do i tell the difference

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 02-26-2005, 09:54 AM
NXS's Avatar
NXS NXS is offline
wind & fire = guides to power
Last photo:
Join Date: Nov 2004
Location: Oklahoma
Posts: 1,534
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
measureing horizontally(side to side, not up and down) the bolt holes are 9.5" apart on an 8.8 housing.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-26-2005, 06:47 PM
Last photo:
Join Date: May 2003
Location: Shreveport LA
Age: 67
Posts: 5,106
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
The 8.8" has straight sections on all 4 sides, while the 7.5" is curved on the sides and straight on the top & bottom. Both have 10 bolts on the cover.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-26-2005, 09:31 PM
Last wiki edit: Window removal and installation Last photo:
Join Date: Dec 2003
Location: SC
Age: 54
Posts: 320
Wiki Edits: 11

Thanks: 0
Thanked 6 Times in 6 Posts
You don't really HAVE to. I swapped a 5.0 into my wife's 86 about 5 years ago. I just KNEW I needed to put in an 8.8", but didn't. To date the 7.5 has held up just fine. I'm sure it will give up sometime, but our situation is such that we can leave it be until it starts giving trouble. Or goes kerbang. Note that we're not running a 351W though. Nor do we race the car or anything.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
8.8 Ford rear end in my 79 G body Malibu 79 Malibu327 Transmission - Rearend 4 05-20-2007 02:26 PM
swapping axles - Ford 8.8 ?? 49T&C Transmission - Rearend 1 05-12-2004 10:09 PM
using a ford 8.8 or 9" gears on my 7.5 FoxThunder 5.0 Transmission - Rearend 2 10-23-2003 08:47 PM
8.8 rear questions mike bryan Transmission - Rearend 2 05-19-2003 03:38 AM
Ford 7.5 vs 8.8 rearend ID copper128 Transmission - Rearend 3 11-25-2002 02:43 AM

All times are GMT -6. The time now is 12:19 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.