Thursday, May 17, 2012

Transmission and Axles


The transmission was the next big step to making the frame into a rolling chassis. Since VW designs their vehicles to have the motor in the back the axle runs through the transmission. There was a part number on the frame and we were able to determine the frame is a 1954. This means we would need a transmission modified, since the size of the transmission changed in 1966. I shopped around and ordered what we needed at the best price. It was supposed to take 3 weeks to arrive. It took seven.

I also ordered axle rods and axle tubes to go with it. I knew I was buying used axle tubes. Both tubes used were less than 1/3 the price for one new one. However, when they arrived I was surprised at their condition.

It was clear by their appearance they had been on the ground under the vehicle and years of weather had caused them to sink into the asphalt. I used the metal grinder with a wire wheel brush to get the big chunks off. A—was gracious enough to take the parts to work and sand blast them so they were clean and pretty.
Next we discovered despite careful research and ordering the right modified parts to fit our frame, the transmission did not bolt in correctly. I took pictures of the problem and posted questions for the experienced minds on The Samba.com as well as sending them to the guy I bought the transmission from. Eventually, Ry—coworker Ru—said the bracket the transmission was supposed to mount to looked like it had been welded on poorly. Sure enough…

C—cut it off and mounted it to the transmission. Then we carefully slid the transmission into place and bolted it to the rest of the frame. Once it was properly positioned C—re-welded the bracket on and then we were in business.

However, because of the design of the transmission the axles and axle tubes have to be put in and on the transmission first before it can be mounted to the frame. So we unscrewed the bolts and carried the transmission to another surface. This is what the transmission looks like without the gears or axles.

The problem was I forgot to order the parts that connected the axle to the transmission. I had all the parts that went from the outside of the axle tube to the wheel rims. I had no idea the differential gear and fulcrum would not come with the transmission. So another call was made, more money was paid, and time elapsed until the parts arrived. 

Finally, the fulcrums go inside the differential gear, the differential gear goes inside the transmission, the axle rods go inside the fulcrum, the axle tubes go over the axle rods, and the whole kit gets bolted to the outside of the transmission. Ta-Da! We are in business.

Here is a view of the transmission with both axle rods and tubes in place and the transmission mounted from the front of the frame.

Here is a view of the transmission mounted with both axles and axle tubes mounted from above the frame.

Just getting the transmission bracket welded on and the parts assembled and mounted took all day. We will have to save adding all the parts that go between the axle tubes and the wheel rims for another day.

I had hoped to have the rear wheels on in early March over my Spring break but that clearly did not happen. The transmission didn't arrive until Easter a month later but even then we did not have all the parts. 

Next step adding the bearings, shocks, and braking system. 

Oh... and in case you are wondering, the tag hanging from the transmission is to remind us there is no oil in it
:-)