Automatic Transmission 2-Speed thru 10-Speed GM Autos | Converters | Shift Kits
Sponsored by:
Sponsored by:

Ultra Newb Question, Does Axle Ratio matter in trans selection?

Thread Tools
 
Search this Thread
 
Old 02-08-2013, 09:29 AM
  #1  
Teching In
Thread Starter
 
Dave Simkus's Avatar
 
Join Date: Feb 2013
Posts: 47
Likes: 0
Received 0 Likes on 0 Posts

Default Ultra Newb Question, Does Axle Ratio matter in trans selection?

My 99 T/A has the optional "Rear Perform Axle, 3.23 Ratio"
Does this matter when getting a new transmission?
Winner of extreme n00b?

-Thanks
Old 02-09-2013, 05:34 PM
  #2  
Moderator
 
mrvedit's Avatar
 
Join Date: Aug 2010
Location: Ann Arbor, MI
Posts: 7,055
Received 389 Likes on 298 Posts

Default

Welcome to the forum.
Sorry no one has answered you yet; it is kinda of an unusual question.

Since there is no choice in gear ratios in automatic transmissions, I am not sure what you are asking. The stock 4L60E has a 1st gear ratio of 3.06.
You could get a 4L80E which has a 1st gear ratio of 2.48, but that is a moderately complex swap. There are hyper-expensive custom parts to change these ratios, but I am sure you are not asking that.

With a stock-ish motor, and a 3.23 rear, you probably want the lower 4L60E ratio. I have a 3.42 rear in my mostly street car and am considering switching to 3.73.

Was I anywhere close to answering your question? If not, give us more details.



Quick Reply: Ultra Newb Question, Does Axle Ratio matter in trans selection?



All times are GMT -5. The time now is 10:17 PM.