Finding a Split T-Case...

[sdgraber]

I know the post 1980 FJ-40's have the stronger split T-cases. If I wanted to find one to go behind a Rock Box or Marlin Toy Box, is the 40 my only possible donor vehicle, or do other post 1980 FJ's or mini-trucks have the stronger split t-case that would swap easily into my 1978-Fj-40?

Thanks,

Scott
78 FJ-40 "Rudy"

 

[bustanutley]

all FJ-60s have split cases, and I think fj-62s have them as well.

 

[Landpimp]

I think for a 40, you can use a 8/80- mid 85 fj40 or 60 split case. latter is different as is the fj62(which is split but vac shifted)

mini not the same

 

[sdgraber]

Busta...and Landpimp,

Thanks! That gives me at least a few more options for rounding one up vs. looking only on 40's

Appreciate it,

Scott
78 FJ-40 "Rudy"

 

[Deep South Cruisers]

the split case didn't start until 4/85 on Fj60's

 

[Cruiserdrew]

the split case didn't start until 4/85 on Fj60's

Sorry Deep South, not true. Split case started in '80, changed in '85 and changed again to the 38 mm idler shaft in mid '86, then changed again in '88.

 

[PabloCruise]

I thought the 38 mm shaft came in mid '85?

 

[Landpimp]

true, but the split case started in 8/80 in the 40/60 series. the 38mm change started in the 60 when the 70 series was introduced.

I thought the 38 mm shaft came in mid '85?

 

[bustanutley]

Oops my bad, I was just guessing on the 62, I figured I may have been wronge given it has an auto. Good info by the way.

Dose the 38mm idler present a problem when trying to use a marlin toybox? Or is it the same dimetionally otherwise?

 

[sdgraber]

I second Busta's question...

I just bought a split case from an 81 FJ-40 and my plan is to put it behind a SM420, and eventually, a 420/RockBox or ToyBox/split case combo. Currently I have the SM420 mated to a 3-speed case. Will I be able to switch out the 3 speed and drop in the split easily, or will there be 'issues'? (idler shaft diameters, etc?)

P.S. I did little research into what a good condition split case should sell for...how did I do getting one home for $400? Sappy or Happy?


Thanks,


Scott
78 FJ-40 "Rudy"

 

[Cruiserdrew]

The Sm420/Split case combo will not work as the output of the SM420 is 10 splines and the input on the Split is some # like 16 or 19. I believe it would work with a Toybox and the correct ends on the Toybox. If you plan a Toybox, why not scrap the SM420 and use a Toyota 4 speed which will shift better and run quieter? Toybox gears are really low anyway so the SM420 is overkill.

If you are happy with what you paid for the split case, it was a good transaction. THere will always be someone to tell you that they got one for less.

 

[bustanutley]

Once again my question appears! Some one needs to make this gear! 10 spline to split case. I like the gearing I have currently and the drive train length. I don’t' know the pledged weaknesses that 3 speed case has. WHEN I break my 3 speed case I would like the option of going to a split case without changing anything else. I have a T case saver but there are a couple of small cracks in my case from when my gears ate themselves They aren’t in a place where the cases break, but still not promising.

If someone makes this gear, tell me! I have researched the best I can, I recall seeing an ad in TT but I’m not sure.

 

[beanz2]

Just curious, why hasn't anybody suggested an Orion? Split case ($250 ish) + Marks4WD gears ($1300 ish) is much more than an Orion case, isn't it?

Dave

 

[bustanutley]

Currently the orion still has some of the same weaknesses of the stock case. It uses the front cone and output off of your old case. Both have been known to break. Both outputs are coarse spline. In the future they are planning to use the same style shaft as the one used on the atlas II.

Oh and the Orion costs 1670, may be on sale though.

Don't get me wrong, my friend has one and I think it is neat. But I like cheep stock parts, and the split case is tough as nails.