T90 3-Speed Transmission Installation Kit T90-BSG

This is the Crown T90-BSG installation kit for the Warner T90 three-speed manual used behind the Go-Devil and Hurricane four-cylinders in Jeep CJ-2A, CJ-3A, CJ-3B, CJ-5 and CJ-6 models, plus Willys trucks and wagons that ran the T90. It is the parts set you need when the case comes apart: the two main ball bearings, the loose needle rollers for the cluster gear and reverse idler, the case and cover gaskets, the front seal, O-rings, thrust washers, snap rings and the shift rail poppet balls.

The usual reasons a T90 comes out are a growl that changes with clutch engagement (worn input or mainshaft bearing), gear oil weeping from the front bearing retainer or top cover, or the cluster gear wobbling on worn needles and causing jump-out in second. Dropped needles are also common on old units that sat with low oil.

On the bench: drive out the countershaft, pull the cluster and count the needles back in with grease and a dummy shaft so they stay in place while you lower the cluster into the case. Replace both main bearings while the shafts are out, set new thrust washers on each end of the cluster, then button up with the new gaskets and seal. Check end play on the cluster before you install the top cover.

This kit does not include synchro rings or gears. If the synchros are worn or you are doing a full overhaul, the T90 master overhaul kit adds those parts.