Anyone done a 205/203 doubler lately?

spraypaintman

spraypaintman

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I'm going to put it behind a TH350 trans. Anyone seen some good write ups?

What is a fairly affordable way to get low gears in a t-case that will be behind a chevy 350v8 with a TH350 or TH400?
 
heres ours on IFSJA doubler
im pretty sure to use a 203 you will need to change the output or the input on the 203, it should be 32 spline on a chevy??
easiest route is to find a th400 with a 203 already hangin off of it.
NorthwestFab makes a good clockable doubler
 
Cool, thanks man. Is there any way around spending the 7hundo for the doubler adapter. Anyone else make on for less? How's yours coming along?
 
I used the NWF and I loved it...worth the extra cash to me.
But I had it in front of a TH400. The NWF kit is nice clocking at different times. When I set mine up I had it set right then did something a little different and 4 bolts later it was re-set.

Jeds Machine has a weld together adapter...clock it how you want and weld the to halfs together. He has to shafts resplined and new..I would get the new.
 
Is the 231/241 doubler about the same price for the adapter?
 
700 bones isnt a bad price really for what you are getting. i think the offroad doubler is a similar price. 231/241 doubler isnt a bad doubler for something that isnt heavy. i wouldnt trust one in my cherokee. i have everything for my doubler except the doubler!
 
if this is goin in your cj what setup do you have now? you can also do a 231/dana300 doubler. great lowrange on that one
 
This is for a new project yj with a 350v8/TH350 trans. I'm trying to decide if I want to do a single transfercase with low gears or do a double case. I'm kind of new to Chevy drivetrain parts so any suggestions are welcome.

:beer:
 
the 700r4 did, and i think the 350/700r4 tailshafts are the same... the th350 came with a np208 though i think, and it should be same as 231/241....

well for wellbase sake, id say go with single case...

the 203/205 setup ill ultimately only give you ~4:1, unless you fork out hte $$ for a lo-max gear set... the 231/300 doubler will give you a ~5.2:1 low range with stock ratios....

but if your just looking for low range then d300 or 205 with 4:1 gear set might work for you...
 
I like the idea of having a dana 300 in it. Would the 231 bolt up to the TH350 or any chevy trans?
 
yeah i think the 700r4/th350 have the same tailshaft adapter... and i know the 700r4 had a 241 from the factory, but it was a 27 spl, IIRC, and not the 23spl like the jeeps...
 
Cool, thanks for the info guys. Kinda lost track of the post. It looks like I could actually make the adapter plate for the 241/d300 combo. I think I may go with the 241/d300 combo.

:beer:
 
Trying running the 203/300. It'll probably give you a longer driveshaft than most set-ups (except a single transfer case with low gears... but the ones that have all the intermediate gears aren't in the same price realm), and it's something a little over 4:1 I believe.
 
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