I Cant Find Info On My Rear End I Have Checked Here http://www.atlantabuick.com/Specs.htm#Rear Axle Charts But Still cant Find It My Rear Code Starts with NZ (x) 013 = NZ (Big Circle With An X In The Middle )013 Just Wondering What My Ratio Is ????? Oh its a 1967 lesabre 2 dr ht w/72 motor and 67 switch tranny I Found This Page On This Board But This Page Is From A 68 Service Manual If Correct Its A 3.91 :3gears: But I May Check Inside Needs Fluid change Anyway <img src="http://i34.photobucket.com/albums/d118/wade67lesabre/ax.jpg" alt="Image hosted by Photobucket.com">
Unlikely. If it wa a 3.91 your engine would be runninng a high rpms just going 60 mph. ( over 3K rpms) You would notice that. The chart you posted is not for your car but rather 4000 series cars. A LeSabre is a 5000 series. You did not say but a 67 340 cid with auto trans was 2.93 standard, 2.78 economy and 3.36 performance. A 3.90 was a special order.
Rear End Codes My Ratio Is 2.93 Went to Library Today And Found A Book With All Codes all Years And NZ Code 1966/67 Is 2.93 and NZ code 1968/69 is 3.91 I Now Have All Buick Codes From About 1965-1976 If Anyone Else needs Help Thanx Wade :3gears: :3gears: :3gears:
