Which Transmission should I go with?
Thread Starter
Staging Lane
Joined: Aug 2004
Posts: 55
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From: Flint, Michigan (Yeah, the little "F" you might find on your VIN)
Which Transmission should I go with? 
Alright guys, I'm going for an Over-Drive tranny for my Chevelle. Currently it's running a 1970 Corvette LT1 (370hp) 
. I'm looking for a replacement for my TH400, however, I'm not really sure what the best bet would be. I'm between the 700R4 or the 4L60, what are the pros & cons of each, who makes the best versions of each tranny, etc... Thanks for any info you guys can share. One thing that might help to know is that I'll be upgrading to an LS2 sometime in the near future.Thanks again, guys.
The Gen-I SBC (4.3, 5.0, 5.7L Vortec) and Gen-II SBC (LT1/4) use the 30-spline version of the 4L60-E. LS1-based engines (incluging the Gen-III 4.8, 5.3, 6.0) use the 33-spline version of the 4L60-E. All 4L65-E are 33-spline. These 33-spline versions take different converters and have different spacing for the flexplate.
