Guest Posted June 18, 2002 Share Posted June 18, 2002 I have a 68 custom skylark I put a 400 with a 400TH in it. I fecently purchase a original 68 posi rearend with 2.93 gears. All mybooks show these gearsfor the 400-AT and 3.42 for 4-speed. What I would like to know is, how would the 2.93gears handle on the hwy. and street? My original non-posi rearend has 2.73 gears. Link to comment Share on other sites More sharing options...
The Old Guy Posted June 18, 2002 Share Posted June 18, 2002 The difference between the 2.7and 2.9 is hardly noticable. The only plus is that you won't melt the right tire. Link to comment Share on other sites More sharing options...
Guest Posted June 18, 2002 Share Posted June 18, 2002 Since we are on the topic of posi's here... I have a 71 rear in my 70 skylark. I am trying to figure out is mine a 30 spline or 28 spline, as I am looking for a posi unit myself. Can you guys shed some light on the subject ? <P>Thanks,<BR>Francisco Link to comment Share on other sites More sharing options...
Guest Posted June 19, 2002 Share Posted June 19, 2002 Thanks Old Guy Link to comment Share on other sites More sharing options...
Guest Posted June 19, 2002 Share Posted June 19, 2002 Sorry WhataLark I can't help you. I don't know that much myself. Link to comment Share on other sites More sharing options...
Guest Posted June 28, 2002 Share Posted June 28, 2002 With the 2.93 in my Riviera I cruise at around 80mph at 3000 rpm. Thats what most modern cars cruise at, but they have an overdrive. <P>We could really wake up our classics if we put lower gears and an overdrive in them. Now if only we had the money Link to comment Share on other sites More sharing options...
The Old Guy Posted June 28, 2002 Share Posted June 28, 2002 I have a 3.31 axle in my 72GS and a 200-4R trans. It gives me the best of both worlds. It runs 13.0s in the quarter mile and pulls 18 MPG at 75 Link to comment Share on other sites More sharing options...
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