2WD TH400 X DANA 300 T/C

Advance Adapter

The GM TH400 automatic transmission adapter to the Jeep Dana 300 is 4.250” in length. The adapter material is 356 T6 heat treated aluminum alloy and has a provision for a transmission mount. The adapter kit includes an adapter housing, new 32 spline Dana 300 input shaft, bearing, snap rings, gaskets, fastening hardware, and adapter instructions.

Transfer Case

The adapter assembly fits the1980-86 Jeep Dana 300. All 300s use a 23 spline input. Some of the adapters we manufacture include a new Dana 300 input with a different input spline. Therefore, if you obtain a Dana 300 from a salvage yard, please verify the input spline.

Transmission

This adapter kit is designed for exclusive use with the 2WD GM TH400 automatic transmission. The TH400 has a case length of 24.250” and a “Texas-shaped” oil pan underneath it. The factory output shaft has a spline count of 32 spline and had various output stick-out lengths.

Note: Our adapter kit can also be used with 4wd TH400 model with a 4.50” out put shaft stickout.

Options

716021 Heavy duty transmission mount

Bill Of Materials

• GASKET-N.P.208 TRANSFER CASE / 716517
• SEAL FOR NEW VENTURE ADAPTERS / 716749
• NUT 3/8 -16 PLATED GRD 5 / 723701
• GM T400/4L80E 862-4709 GASKET / 716510
• ADAPTER- TH400 TO D300 / 51-6400
• SHAFT- D300 INPUT/ NV4500 32T / 52-0208
• SEALED BEARING 209RS / 716308
• H.H.C.S. 3/8 -16 X 1-1/2 gr. 5 zinc / 723723
• H.H.C.S. 3/8 -16 X 1-1/4 (GR5) zinc / 723722
• LOCK WASHER 3/8 ZINC / 723704
• STUD BOLT 3/8 -16 X 2 LG B7 / 723711