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Old 03-15-2015, 06:25 PM   #1
sabbey10
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203/205 with long input?

I have a 91 v3500 with 4l80e/205 and have acquired a np203 off a th400.

I know if I swap the 205 input to the short style there is numerous adapters available, but is there a adapter which lets me keep the long input in the 205? I have tons of wheelbase to accommodate the extra few inches and with 8" lift the longer front driveshaft would be great.

Thanks
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Old 03-15-2015, 08:10 PM   #2
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Re: 203/205 with long input?

Try JEDS Machining he can make just about any configuration and it is made of steel so you have no worries of strength .I think it is 3" longer with that input .
I would also recommend a new output shaft as opposed to a cut and respline.
http://jedsmachining.com/index.html
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Old 03-15-2015, 09:28 PM   #3
franken
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Re: 203/205 with long input?

Is the output of the 203 range box 32 spline?
How far does it stick out?
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Old 03-16-2015, 12:08 AM   #4
$20071k10
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Re: 203/205 with long input?

Why would you want to change the 205 for the 203 any way
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Old 03-16-2015, 11:51 AM   #5
snj8198
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Re: 203/205 with long input?

Quote:
Originally Posted by $20071k10 View Post
Why would you want to change the 205 for the 203 any way
I bet he's using just the range box of the 203 in front of the 205 for a doubler combo. It's going in the OP's '91 with 38's so he's offroading this rig.
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Old 03-16-2015, 02:29 PM   #6
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Re: 203/205 with long input?

thats alot of stress on the six bolts on the front of the 205 let alone adding 2" spacer to those bolts. just swap the input gear. it is a breeze of a job.
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Old 03-16-2015, 11:31 PM   #7
sabbey10
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Re: 203/205 with long input?

Thanks for the input guys, It is a wheeling rig but I live close enough to work (5km) that I daily drive it in the winter and rainy days in the summer.

the 203 would only be a range box in front of the 205 , a few advantages being a extra low range and a bit of extra length in the front driveshaft
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1991 V3500, 350/4l80e, 8", 38.5 boggers
1969 RS Camaro, under construction, 12 bolt, M20 muncie, BBC TBD
1969 Camaro Convertibe, 350/th350, all original and numbers matching
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Old 03-17-2015, 05:38 AM   #8
andrewmp6
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Re: 203/205 with long input?

Talk to http://offroaddesign.com/ or http://www.northwestfab.com/
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Old 03-17-2015, 09:16 AM   #9
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Re: 203/205 with long input?

Here is a pic of a jeds adapter you are looking for -GM NP203 to a long input NP205 .

A short input NP205 adapter is only 3" case to case and will give you about 9" longer front driveshaft.
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Old 03-17-2015, 10:33 AM   #10
sabbey10
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Re: 203/205 with long input?

thanks doublerclucker, that is exactly what I am looking for. I sent a email to Jed's but will follow up with a call..

I have crossover steering from NWF and they have great products, I just would like the longer adapter and theres only works with the short input
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1991 V3500, 350/4l80e, 8", 38.5 boggers
1969 RS Camaro, under construction, 12 bolt, M20 muncie, BBC TBD
1969 Camaro Convertibe, 350/th350, all original and numbers matching
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Old 03-29-2015, 01:40 AM   #11
1985-GMC
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Re: 203/205 with long input?

Does anyone know what Jeds 203-205 adapter runs? Short and long versions for a figure 8 pattern 205.
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