203/205 with long input? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sabbey10 · 03-15-2015, 06:25 PM

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

doubleclucker · 03-15-2015, 08:10 PM

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

franken · 03-15-2015, 09:28 PM

Is the output of the 203 range box 32 spline?
How far does it stick out?

$20071k10 · 03-16-2015, 12:08 AM

Why would you want to change the 205 for the 203 any way

snj8198 · 03-16-2015, 11:51 AM

Quote:

Originally Posted by $20071k10

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.

obijuan · 03-16-2015, 02:29 PM

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.

sabbey10 · 03-16-2015, 11:31 PM

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

andrewmp6 · 03-17-2015, 05:38 AM

Talk to http://offroaddesign.com/ or http://www.northwestfab.com/

doubleclucker · 03-17-2015, 09:16 AM

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.

sabbey10 · 03-17-2015, 10:33 AM

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

1985-GMC · 03-29-2015, 01:40 AM

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

03-15-2015, 06:25 PM	#1
sabbey10 Registered User Join Date: Jul 2014 Location: Dawson Creek, BC, Canada Posts: 7	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 __________________ 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

03-15-2015, 08:10 PM	#2
doubleclucker Registered User Join Date: Jan 2014 Location: ONTARIO CANADA Posts: 130	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 __________________ 100:1 low gear!

03-15-2015, 09:28 PM	#3
franken Registered User Join Date: Jun 2013 Location: Somewhere Posts: 3,057	Re: 203/205 with long input? Is the output of the 203 range box 32 spline? How far does it stick out?

03-16-2015, 12:08 AM	#4
$20071k10 Registered User Join Date: Feb 2015 Location: Mancos,CO Posts: 101	Re: 203/205 with long input? Why would you want to change the 205 for the 203 any way __________________ Brian

03-16-2015, 02:29 PM	#6
obijuan Registered User Join Date: Jun 2012 Location: cibolo tx Posts: 1,033	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.

03-16-2015, 11:31 PM	#7
sabbey10 Registered User Join Date: Jul 2014 Location: Dawson Creek, BC, Canada Posts: 7	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 __________________ 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

03-17-2015, 05:38 AM	#8
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: 203/205 with long input? Talk to http://offroaddesign.com/ or http://www.northwestfab.com/

03-17-2015, 09:16 AM	#9
doubleclucker Registered User Join Date: Jan 2014 Location: ONTARIO CANADA Posts: 130	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. Attached Images __________________ 100:1 low gear!

03-17-2015, 10:33 AM	#10
sabbey10 Registered User Join Date: Jul 2014 Location: Dawson Creek, BC, Canada Posts: 7	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 __________________ 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

03-29-2015, 01:40 AM	#11
1985-GMC Chevy Enthusiast Join Date: Jul 2009 Location: Canyon Lake Texas Posts: 2,024	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. __________________ Tony 1985 GMC K2500 restoration Project: Rust, White & Blue 1989 Chevy R3500 CC Cummins & 4X4 swap some day... 1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress)



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