V8 conversation help (1 Viewer)

[Rock40]

There is some mis-information on here....your 68' does not have 3.7 gears, it's equipped with the standard 4.10's

Everybody has an opinion, heres mine: I'd go with the NV4500 trans mated to an Orion or split case. BUT, I've been running a stock 3 speed transfer case (exactly like the one you currently have) in my truck for 13+ years now without issue. Heavy wheeling, Vortec 5.7, ARB's, 1 ton axles and it keeps going just fine. I have a light foot and it's braced. The NV4500 is a good shifting trans and you WILL want the overdrive unless you are going to run 37"s at least. With no overdrive, 37"s and 3.7 axle gears, I do about 2000 rpm at 60MPH.

The VSS is not a big deal, there are lots of ways to get it working correctly. Here's mine which has 31,000+ trouble free miles on it. It uses the standard extension housing however it required an adapter drive pin (about $10) from a speedo shop. I sourced the magnetic pulse sender from Speed Scene Wiring. Good luck with your conversion, make it into what YOU want.

 

[RealFJ]

View attachment 1343330
I'm putting in Chev V6 with a NV4500 and stock Toy t.c. I looked at the options for VSS. I liked what SpotCruiser did and took it further because I also have the AA transfer-case cross member. Above is the problem I faced and sounds the same as yours, there was no shaft to bolt the sending unit gear onto.
View attachment 1343331
View attachment 1343365
I had a machine shop turn some round stock to fit the gear wheel, bored it and bored and threaded the output shaft on the transfer case. They did an awesome job and added a lip for the wheel gear to rest on and a lip to centre the round stock on the output shaft. Some locktite, a large washer and a fine thread bolt I'm good to go. There is plenty of room in the cone of the cross member. I just had to figure out my length and depths to match the sending unit on the cone to line up with the gear wheel on the shaft. Welded in a nut for a bung and

 

[spotcruiser]

Good thinking.

I don't know why you guys have shorter transmission output shafts than I do. I guess it must be due to a shorter AA spud shaft for the given adapter setup.

 

[RealFJ]

You first!!!!

 

[RealFJ]

The replacement shaft from AA is shorter than the stock shaft. I don't know why. I really liked your idea. It was the best option for me. Many thanks for your post.

 

[AggiePE]

Not sure what the deal is with the shorter shaft, could it be a machining error? I got my kit from AA (running the NV4500 w/ a split case on my 93 FJ60). I was able to thread the reluctor ring gear directly onto the shaft as the retaining nut for the bearing. I did not use the existing or original nut that has to be staked, I used the supplied nut that came with the kit from JTR. Worked like it should have. Put some thread locker on the nit since it sis not have any place to stake it.

 

[AggiePE]

I did not use the original cover, JTR supplied the case/cover for the reluctor ring.