A8 Parts Forum  

Go Back   A8 Parts Forum > A8 D2 > D2 - Transmission

D2 - Transmission Gearboxes, diffs, drive shafts.

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
  #6  
Old 4th February 2011, 12:21 PM
Mr K Mr K is offline
Senior Member
 
Join Date: Dec 2009
Posts: 281
Default

Quote:
Originally Posted by mattsimis View Post
I cannot visualise why different ratios on the Rear diff would make its "incompatible" with a different gearbox.. any thoughts?
the front diff is built into the gearbox, change the gearbox and your changing the front diff. If the front diff isnt the same as the rear your front and rear wheels will be going at different speeds.

To be honest, I expect the actual gear ratios within the box are the same, and audi final drive for the A8 and S8 to give the differences.

If your doing this for MPG, I would think about how long its going to take to get the pay back for the new box. Also my s8 (with an S8 gearbox/diff) averaged about 29mpg in both directions on the 600mile round trip to the lake district a few months back, cruising at a steady 70. most of the time I get 20mpg. my mate who had a PF A8 4.2 got about 22-24mpg on average. Bassically dont fit this gearbox if your expecting 30mpg out of your car afterwards, I would expect 1, maybe 2 mpg more?
__________________
'02 S8 - Ebony Black Pearl, 'Swing' Grey Leather/Alcantara, PDC, Xenon Plus, Bose, Phone Prep, Navigation Plus, TV, auto dipping interior and exterior mirrors, UV/Solar Tint Glass, Ski Hatch, Extended leather pack 1, Rear Sun Blinds, Memory Driver & Passenger Seat, Heated Front Screen, Heated Rear Seats.

Reply With Quote
 


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

Forum Jump


All times are GMT. The time now is 11:39 PM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.