TH-350
I have a 1972 Nova with a 327 .030 over 10.5 compression. 250 @.050 cam with .555 lift Mechanical / Solid lifter cam, AFR 195 heads, Weiand Team G with a Holley 800 double. TH350 combo with a shift kit and a B&M 10" 3600 torgue converter stalls between 3600 - 3800 rpms with a 12 bolt posi with 4.56 gears.
The problem is a year ago I was going through the traps at about 7500 rpms. I ususally shift around 7300 rpms...The last time at the track I only went through about 6200 rpms...the next pass only around 5800 rpms...my final pass only around 5500 rpms...I have ran a best of 12.57...then 13.00...then a 13.20 as the rpms drop.
The car comes out of the hole great with the torque converter...it feels like the tranny is slipping but I am losing rpms so that doesn't make sense...
Also it doesn't "chirp" the tires as I go from first to second gear like it used to...
Any ideas? Time for a rebuild? New shift kit? Valve body? Torque Converter?