Wide Ratio Gearbox And 1380 Engine Build by AndyMiniMad

3 minute(s) of a 171 minute read

Well the bits are here in super fast time from Guessworks and im off to the garage to fit them.
I bought a central oil pick up pipe as well just because ive decided to use this box on the 1380 build.
I removed the laygear, old oil pick up and cage, Then loosely slid in the new pick up pipe.



It fits through the hole in the casing next to the reverse gear idler.
Then its time for the new laygear fitted in the same way as before although the center pick up does get in the way so it took a bit of a shoogle to get it all lined up.



Once it was in and running smoothly I fixed the oil pipe as normal to the back of the box. I did not need to use new gaskets on either side because the old pipe had not been tightened up before removal. The bracket on the pipe is fixed as shown in the picture, I reused one of the old bolts and used a nylock nut.

After advice taken on the forum I have decided on a 3.1-1 final drive, this should give me a really comfortable cruising speed due to the longer 3rd and 4th gears in the wide ratio box, acceleration should still be adaquate due to the 1ts and 2nd ratios being the same as normal, also there will be plenty of torque to pull the longer gears as im building a lightly tuned 1380 to go with this box. (Keep watching)
So here is the 19 tooth gear in place and the big washer fitted, note the tabs have not been bent over yet as i still need to torque the nut to 150.



I have stripped the diff and will post pictures of the build and install when the upgraded pin and gears arrive.
So thats it for now. Hope this is being helpfull to some of you, Let me know if im doing things wrong or maybe there is an easyer way to do some of the stuff in this thread.