Rebuilt D-300 Transfer-case, 1980 – 1986: Against T-176, T-177, T-4, SR-4, T-5. We keep these in stock and ready to order. We also have an available upgrade to low range 4:1 New TL gears.
These D-300 transfer-cases are professionally rebuilt and include at the minimum: New bearings, seals, gaskets, and faced surfaces. They are sealed by high end silicone with iron coated in quality metal surface enamel. The shafts are checked to spec and replaced if needed. They will have either new or reconditioned yokes. There are a multitude of other options and upgrades for the Dana 300 available as well, that we are happy to install for no or little additional labor. $1650, $650 Core Charge
We have built a great deal of gearboxes and learned that quality means triple checking parts and workmanship. We make sure to have multiple sets of eyes inspect our units, even our beloved shop dogs.
Special 4:1 Low range Re-manufactured all new gears D-300 HD transfercase
Special divorced D-300 transfercase for other applications
Scout model of almostD-300 1980
We can also rebuild your existing D-300 transfer-case as per your specific instructions with any upgrades and kits specified. This is the most careful and custom option.
We do have model 300 transfercases rebuilt with Tera-Low 4:1 gears. These D-300’s with have slight modifications that take extra time but allow for a much lower gearing than stock using the dana 300 4:1 low gears.
Please be aware and specify the length of your D-300 rear output housing as well as the splines and application of input shaft as there are multiple different configurations. The D-300’s came with a short 1980 version and the slightly longer 81-86 version of the rear output housing. The input shafts only came in one variety for the Jeeps, but there are MANY aftermarket options and hidden surprises that no one can know until it is taken out of the vehicle.
Spicer model 300 transfer-cases have a passenger-side front output and a centered rear output, unlike like previous Dana models, They do not have an output gear mounted to the transmission main shaft but a gear that rides on its own, bearing mounted input shaft. The rear output and intermediate gear shafts are the only real “weak points” and can be upgraded. Although they are still much stronger than their predecessors. The Scout version of the D-300 that was only built in 1980 has the same Texas pattern face and transmission mounted output gear as did the D-18/20 and can be very confusing, as it looks rather like a D-20. We have even found what appears to be in-between models with parts that do not belong with the rest and housings drilled differently leaving parts of the casting left entirely un-drilled from the factory.
