Rebuilt tranny too tight? Options

[kenpolives]

I finally got my Car/ rebuilt tranny back from the mechanic today, new 1st gear, slider, and syncro. However getting into first is very hard and reguires a good amount of force, is this normal? and will it get better as the gears are worked more.

No grinds on anything like that I am happy to say.

74 side shifter

Thanks

[PRS914-6]

Here is something I posted on the bird board for a 915 but it would work the same for a 901. Basically the new syncros texture is like sand paper and until you get it rubbed off, it will be stiff. Try this, it works...

I thought I would share this since it worked so well. The "concept" but not the method came from John Walker and Carquip.

I fully rebuilt a 915. New sliders, syncros, dog teeth, bearings etc. As usual, it shifted very stiff.

I filled it with cheap 90 wt. With the car on jack stands and the drive shafts disconnected I ran the engine at about 2500 rpm and started shifting gears back and forth with NO CLUTCH. I probably shifted 200 times fast\back and forth. Then I hooked up the drive shafts and mounted the tires and repeated the procedure with no clutch again but still on the stands. This added extra weight and inertia for the syncros to have to slow down.

I then dumped the cheap oil and refilled with a quality oil and took it for a ride. This thing shifts like butter! Can't believe it's a 915......Needless to say, I'm a happy camper.