6l80 to NP205 shifter issues... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ls1nova71 · 11-09-2021, 11:48 AM

Anyone on here put an NP205 transfercase behind a 6l80 with an Advance Adapters kit? It looks like a nice adapter, but there's no where to bolt the shifter to it.... Wondering if someone has come up with a solution before I start fabricating some kind of a mount on my own.

6600DURAMAX · 11-10-2021, 06:04 PM

Not to hyjack the topic but how are you shifting your 6L80E?

My 6L80 has a 208 behind it and I plan on using a shift kit from JB Customs -
jb-customs-fabrication.myshopify.com They do have a NP205 kit for $278

ls1nova71 · 11-12-2021, 11:16 AM

Quote:

Originally Posted by 6600DURAMAX

Not to hyjack the topic but how are you shifting your 6L80E?

My 6L80 has a 208 behind it and I plan on using a shift kit from JB Customs -
jb-customs-fabrication.myshopify.com They do have a NP205 kit for $278

I haven't gotten to the transmission shifter yet, but that looks pretty straight forward other than the long tube header in the way. I'm thinking of just using a Lokar adjustable shift linkage on it.

I have heard about the JB Custom cable shifter, that's what Advance Adapters said to use, but to run the 205 I'm pretty sure you would need the twin stick with 2 shifters and 2 cables, none of which I'm a fan of. Going to try and fab up something I guess since it appears no one has done anything like that yet, so there's no off the shelf answer.

**mongocanfly** · 11-12-2021, 05:41 PM

saw this
most of what i saw was some version of twin sticks, (air ,elec, cable, or levers)

HotRod4me · 01-29-2022, 11:17 PM

I used roughly the same same set up on mine. L96/6L90 with an Advanced Adapter kit. I wanted to keep the stock appearance and not add a twin stick set-up. I had to cut down the 6L90 out put shaft and add a 3/4" spacer to the adapter, so I would have enough splines in the transfer case output shaft. Used 2" flat stock and formed it around the curve of the adapter. Then welded on some sides and a plate to bolt it in 2 places on the transmission tail. Used a couple spacers to get the correct fitting and extended the arm to the transfer case about 1-1/2", so the stock shifter would sit at the correct angle.

ls1nova71 · 01-30-2022, 12:46 PM

Yeah, I ended up doing roughly the same thing. Its not pretty,, but looks like it is going to work out fine.

HotRod4me · 01-30-2022, 09:12 PM

Looks good!!

I was happy with the Advanced Adapter kit, but they sure could do a better job with shift arm mounting options.

I've gotten a lot of tips that have pointed me in the right direction from your previous postings. Keep up the good work.

Thanks

11-09-2021, 11:48 AM	#1
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	6l80 to NP205 shifter issues... Anyone on here put an NP205 transfercase behind a 6l80 with an Advance Adapters kit? It looks like a nice adapter, but there's no where to bolt the shifter to it.... Wondering if someone has come up with a solution before I start fabricating some kind of a mount on my own. Attached Images __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

11-10-2021, 06:04 PM	#2
6600DURAMAX Registered User Join Date: Nov 2000 Location: Wheatfield IN, USA Posts: 1,124	Re: 6l80 to NP205 shifter issues... Not to hyjack the topic but how are you shifting your 6L80E? My 6L80 has a 208 behind it and I plan on using a shift kit from JB Customs - jb-customs-fabrication.myshopify.com They do have a NP205 kit for $278 __________________ 1972 K5 - LS3/408 (595Hp) -6L80e-One Tons with 4.56, 20'' Beadlocks with 37'' rubber, full TMI interior, JL Audio ..... 1971 CREWMAX Build.....at body shop for couple more years

11-12-2021, 05:41 PM	#4
mongocanfly Post Whore Join Date: May 2015 Location: Alabama Posts: 14,670	Re: 6l80 to NP205 shifter issues... saw this most of what i saw was some version of twin sticks, (air ,elec, cable, or levers) Attached Images __________________ Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver

01-29-2022, 11:17 PM	#5
HotRod4me Registered User Join Date: Feb 2020 Location: Beloit, WI Posts: 36	Re: 6l80 to NP205 shifter issues... I used roughly the same same set up on mine. L96/6L90 with an Advanced Adapter kit. I wanted to keep the stock appearance and not add a twin stick set-up. I had to cut down the 6L90 out put shaft and add a 3/4" spacer to the adapter, so I would have enough splines in the transfer case output shaft. Used 2" flat stock and formed it around the curve of the adapter. Then welded on some sides and a plate to bolt it in 2 places on the transmission tail. Used a couple spacers to get the correct fitting and extended the arm to the transfer case about 1-1/2", so the stock shifter would sit at the correct angle. Attached Images

01-30-2022, 12:46 PM	#6
ls1nova71 Registered User Join Date: Dec 2009 Location: Independence Mo Posts: 4,119	Re: 6l80 to NP205 shifter issues... Yeah, I ended up doing roughly the same thing. Its not pretty,, but looks like it is going to work out fine. Attached Images __________________ My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html

01-30-2022, 09:12 PM	#7
HotRod4me Registered User Join Date: Feb 2020 Location: Beloit, WI Posts: 36	Re: 6l80 to NP205 shifter issues... Looks good!! I was happy with the Advanced Adapter kit, but they sure could do a better job with shift arm mounting options. I've gotten a lot of tips that have pointed me in the right direction from your previous postings. Keep up the good work. Thanks



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