Discussion Starter · #1 ·
I am thinking about buying a getrag unit for my 72 CTD flat bed build, anyone here done a 5 speed first gen conversion?
I have the auto in the cummins, not sure what the call numbers are, I am guessing the g360 is the getrag, so probably the G56? Whoa- they are way more expensive than the getrag! Probably going with the G360- though I now am seeing prices all over the place for both- 1500 and up.I did a nv4500 conversion. Are we talking about a g360 or g56?
Sorry, I may have not been specific enough- I am using a titled 72 4whl drive 4 speed truck cab. I am thinking the tunnel and the pedals will be my only easy part LOL.The trans tunnel may be small/low on a 2wd auto truck. Some floor surgery is definitely required. Probably cleanest to cut the tunnel out of a manual trans or 4wd truck and graft it in.
You also need the clutch hydraulic pedal & master stuff from a 88-93 truck.
It's a 4 wheel with the 8inch frameWhere I'm going is the trans crossmembers are different heights for the 6" vs the 7 and 8" frames.
I'm still not clear if this a 4wd or 2WD truck being built...
This is great info, thanks!Whatever gearbox you decide on, the bell housing and engine adapter have to be matched. If you get your trans from a salvage, it would be most ideal those two items come from the same unit.
Or you wind up like me who had to take extra steps in taking runout readings along the bellhousing output bore (where gearbox mounts) to make sure the engine adapter I used would concentrically mount the bellhousing where it should be. Or you will have a bad time. First I had a adapter from ebay advertised for NV4500 and was waay out on my readings. I had to buy a brand new adapter referencing the p/n to the bellhousing then my readings came out correct.
The other matter is getting your tcase to fit the manual. It needs to be 29 spline. The auto is 23.It's a 4 wheel with the 8inch frame
This was a question I was going to ask based on my jeep swaps as well and spline issues. IIRC< crossmember mounts to the Tcase correct? Can you switch the 23 spline to a 29 spline with a simple gear change? What model number is the Tcase?The other matter is getting your tcase to fit the manual. It needs to be 29 spline. The auto is 23.