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View Full Version : 205 doubler/ Twin stick ...in a cummins??


Torch2815
02-25-2007, 05:51 PM
HEy folks looking for some input...I am playing with the idea of doing a np205/203 doubler to get the low crawl ratio for my 90' diesel, But I don't know anything about it. Who knows of a company that sells the parts around here and what all do I need, and need to know about my 205 (currently in the truck). The same goes for the twin stick, although thats probably more cross compatable.

u2slow
02-25-2007, 06:44 PM
I think the hard part is a 29-spline 203 :(

You might want to look at NWF's BlackBox... it has the spline you need.
http://northwestfab.com/

Torch2815
02-25-2007, 07:25 PM
Yeah I was checkin that out , thinkin about it, since when all is said and done there around the same price...

tenpack
02-25-2007, 09:20 PM
I think the hard part is a 29-spline 203 :(

You might want to look at NWF's BlackBox... it has the spline you need.
http://northwestfab.com/


if i got my shit straight, GM and dodge both use the figure-8 pattern but the dodge is 29 spline and the GM is 27. I'm assuming ford used the 32 spline?

u2slow
02-25-2007, 09:39 PM
if i got my shit straight, GM and dodge both use the figure-8 pattern but the dodge is 29 spline and the GM is 27. I'm assuming ford used the 32 spline?

GM is 32 w/TH400 or 4L80E. 27-spline w/TH350. 10-spline for manual unless 85+, then 32. Round pattern from 85+.

Dodge is 29 with a Cummins/5spd. Otherwise 23-spline. All fig-8 pattern. Some apps use a stock fig8/round adapter.

Ford is 31-spline & round pattern.

Dirty Sanchez
02-25-2007, 09:42 PM
if i got my shit straight, GM and dodge both use the figure-8 pattern but the dodge is 29 spline and the GM is 27. I'm assuming ford used the 32 spline?


ford uses a 31 spline, gm uses the 32 and course 10 plus the 27 , gm also has a round pattern. check out a brown lipe box too, heavy but kinda cool, under/over drive. Cheers

Dirty Sanchez
02-25-2007, 09:44 PM
shit, ya beat me to it, type faster biatch