found a stripped governor gear
im in the tear down stage of my th400 rebuild. the problem i had was it felt like in second and third it was slipping. first and reverse felt fine. i found the governor gear stripped out. could this be the only issue? i thought it had mostly to do with shifting? this trans has been rebuilt previously by a racing shop and they put the manual/auto type valve body and most of the time i shift it manually anyway
i went with the atsg manual and it seems lacking on the trouble shooting specs and inspection. its more of a cook book do this-do this-do this, etc.
i went with this kit
1998 Bonneville SSE
2007 Monte Carlo LT-KYB, Clarion, Polk audio, Kicker
1999 Yukon SLE-KYB, Air lift, Reese dual-cam, Tekonsha
1987 Firebird-355/th400-nothing stock