Th400 no 3rd gear
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- Location
- PA
- Vehicle(s)
- 1982 CJ-7 258 / T-18 / Dana 300 31 in All Terrains.
1978 CJ-7 304 / TH 400 / Quadratrac 32 in Mud Terrains
Beyond low or burnt fluid is there anything else I can check for ( without dropping the transmission) that would keep the TH 400 from shifting into 3rd gear? I know there's vacuum lines and I believe a module of some sort. The front axle had lock out hubs installed but I don't know if there was an actual part time kit installed or not. I'm not sure how to determine that either. Anyway of figuring that out as well would be helpful. It's a '79 304 / TH400/ 1339 combo with the 4 low reduction.