No polls for me thanks. Whats popular opinion have to say about running dual cases (toy) behind an sm420 and a 300 hp sbc? I currently have a 20 with a gearset in my cruzah and am preparing to swap to dual cases. Are the toy cases going to be my new "weak link" I have only broke the rear output on the 20 twice before making my own HD output shaft. (once while at just above idle, once while peeling out. - no breakage now, with the big output. Should I be concerned? I am a finesse wheeler, only using the stupid pedal when absolutely necessary. Is the torque going to kill them? Lemme have it!

my rig weighs 3400 lbs
sm420
toy dual case with 4:71 gear in the back case
4.3 vortec motor with mods ( maybe 210 hp )
300:1 gearing available although i rarley use that low.
38.5 sx tires

i expect it to hold up to my abusive driving style just fine.

I have plans (and all the parts) for a similar setup to Camo's:

4.3L
TH350
Toy dual cases
Dual Dana 60's w/ 4.88's
42's


I honestly do not expect any problem out of the cases at all :)

there is a toy truck here in Carson City, it belongs to
PVSTOY on the bulletin board here, he's running a
383 sbc/nv4500/toy tc/ jp eaton set-up and has no
problems that I know of. send him a message he
can give you all the specific details.

I'm glad camo replied. If he hasn't broken one yet I'll probably be fine. I will run turbo cases, because I know a few people who have broken the input shafts.

Aggro, you got any pics or details on the custom output.

I need some details man :cool:

I talked to rick at OTT when I was thinking of running dual cases in my 4 Runner I'm building and he told me 500HP with dual case would be a bad idea.:( I was even gonna run the 4.7's in 1 case and run the stock in the other. I've decided to do the doubler route.....heavy but strong.....

Originally posted by Aggro
I'm glad camo replied. If he hasn't broken one yet I'll probably be fine.

He <i>has</i> broken one. ;)

Originally posted by Lance


He <i>has</i> broken one. ;)


Actually, I think I recall that he broke a set of Marlin's aftermarket 4.7 gear sets - not the case :p

I don't have the wheelbase for the doubler- that's the reason for the dual toy cases. I'm amazed there's no "get an atlas" comments thus far!! jdjanda: mine output shaft is 1.25" diameter and 29 spline. the ones on the market are like 1.39" with a higher spline count. 1.25" , 29 spline is the same as a dana 60 pinion, so breakage is probably possible but not likely for me.