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mike2002 · 03-28-2005, 09:47 AM

4t60 was used in older 3800, 3.4 and 3100 powered cars, and a few others.

you want the 4t65 like he said

id use the 4t65 over the 4t65hd unless your running serious power, the 4t65 had 3.29 gearing (or maybe its 3.33) and the 4t65hd has 2.93 gearing. they do make kits to either change that to 3.29/3.69 (i wouldn't get the 3.69 unless you had a huge turbo or somthing) though

they also makes kits to turn the 4t65 into a 4t65-hd and keep the better gearing

03-28-2005, 09:47 AM	#44
mike2002 GLS member Join Date: Aug 2004 Location: rosemount, MN Posts: 1,340	4t60 was used in older 3800, 3.4 and 3100 powered cars, and a few others. you want the 4t65 like he said id use the 4t65 over the 4t65hd unless your running serious power, the 4t65 had 3.29 gearing (or maybe its 3.33) and the 4t65hd has 2.93 gearing. they do make kits to either change that to 3.29/3.69 (i wouldn't get the 3.69 unless you had a huge turbo or somthing) though they also makes kits to turn the 4t65 into a 4t65-hd and keep the better gearing __________________ 2001 Alero GLS - Sold!