3.5 rear diff - Page 2 - Mercedes-Benz Forum

Reply
 
LinkBack Thread Tools Display Modes
post #11 of 13 (permalink) Old 07-07-2014, 12:33 PM Thread Starter
BenzWorld Veteran
 
tewfiks's Avatar
 
Date registered: Dec 2005
Vehicle: Many MBZ, Couple of 911s, couple of pick ups
Location: Grimes, Iowa
Posts: 663
Mentioned: 1 Post(s)
Quoted: 50 Post(s)
(Thread Starter)
Post Ratios?

Think I have sourced a rear differential from a v8 sedan (108). One is from a US spec car, the other from a Euro/Japan car.

Any insight on the ratios and which would be more drivable?

Thanks

Sherif Tewfik

70 280 SE/cab
72 280SE 4.5
78 6.9
80 280 SL
88 300 CE
91 420SEL
94 E500
95 E420
95 E320 Cab
95 E320 Wagon
05 E55 Wagon
07 GL320 CDI
tewfiks is offline  
Sponsored Links
Advertisement
 
post #12 of 13 (permalink) Old 07-07-2014, 05:35 PM
BenzWorld Senior Member
 
drew56cus's Avatar
 
Date registered: Oct 2006
Vehicle: 1965 220SE sedan (finnie) with 450SE conversion, 1964 220SE coupe project, 1966 300SE coupe
Location: Brisbane Australia
Posts: 426
Mentioned: 2 Post(s)
Quoted: 33 Post(s)
The diff ratio is stamped on the diff. hard to describe without a pic but here goes - Look at the diff from I think the left side. Look from side on. There is a flat metal web part on the side of the diff, whose face is vertical. The ratio is stamped on there.
Most euro ones are 3.46 from memory, but some US cars also had 3.27. Diff ratios are all a trade-off between highway cruising and take-off speed. I have a 3.46 in my 450 powered W111 and it is fine on the highway.

Look for an on-line calculator of engine rpm given a diff ratio and tyre diameter, then plug the ratios in and see what rpm they give. a 2.8 is not an overly torquey motor for a heavy car so I would be worried that a 3.27 is putting too much strain on the engine at normal speeds around town.
drew56cus is offline  
post #13 of 13 (permalink) Old 07-08-2014, 07:58 AM Thread Starter
BenzWorld Veteran
 
tewfiks's Avatar
 
Date registered: Dec 2005
Vehicle: Many MBZ, Couple of 911s, couple of pick ups
Location: Grimes, Iowa
Posts: 663
Mentioned: 1 Post(s)
Quoted: 50 Post(s)
(Thread Starter)
Post

Thanks for the information. I will look for the stamping on the differential.

Sherif Tewfik

70 280 SE/cab
72 280SE 4.5
78 6.9
80 280 SL
88 300 CE
91 420SEL
94 E500
95 E420
95 E320 Cab
95 E320 Wagon
05 E55 Wagon
07 GL320 CDI
tewfiks is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > General Mercedes-Benz Forums > Vintage Mercedes-Benz

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum 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 for yourself.

Email Address:
OR

Log-in









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
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

 

Title goes here

close
video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome