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Has anyone machined a TH400/NP205 short adapter to mate with a 4L80 and D60 Question
- Thread starter Leadfoot
- Start date
ya and i am not done yet.
i have a 205 full torn down. blasted ready for paint. then full reman bearing kit/32 spline front swap / northwest fab 205 bling kit.
i have a 205 full torn down. blasted ready for paint. then full reman bearing kit/32 spline front swap / northwest fab 205 bling kit.
72ChevySWB4x4
Registered Member
Awesome Thread!
ALOT of great info here guys THANKS!
doing a 6.0/R.V. 4l80e/np205(70s style) swap now in my 72 SWB 4x4 and this thread has some great info.
ALOT of great info here guys THANKS!
doing a 6.0/R.V. 4l80e/np205(70s style) swap now in my 72 SWB 4x4 and this thread has some great info.
72ChevySWB4x4
Registered Member
hey guys I found a guy selling a rebuilt np205 32 spline will this bolt right up to my 99 2wd 4l80e with R.V. shaft? I am currently reading through this thread again as well just figured I'd post to see if someone who knows might answer..thanks in advance
do you have a fixed yoke or slip shaft on the back of the tranny ?
and dont forget to swap out the freeze plug to 4x4 version on the back of the tranny. gm part # is in here.
and what year/style is the 32 spline 205 ? fig 8 adaptor or round 6 style adaptor ?
get this info and if possible post pic's .
and how much does he want for reman 205 ?
thay are real easy to reman. if you pay 25 to be full member here you will see all pics and get to the tech section for paid members. there is a 5.3-6.0 swap thread in there and my 4l80-e to 203 range box to ord doubbler kit to 32 spline 205 . range box and 205 i remaned my self . i had never done before and used info from internet. i even included the links in the end of the story. and there is a LOT of pics step by step on the reman job.
and dont forget to swap out the freeze plug to 4x4 version on the back of the tranny. gm part # is in here.
and what year/style is the 32 spline 205 ? fig 8 adaptor or round 6 style adaptor ?
get this info and if possible post pic's .
and how much does he want for reman 205 ?
thay are real easy to reman. if you pay 25 to be full member here you will see all pics and get to the tech section for paid members. there is a 5.3-6.0 swap thread in there and my 4l80-e to 203 range box to ord doubbler kit to 32 spline 205 . range box and 205 i remaned my self . i had never done before and used info from internet. i even included the links in the end of the story. and there is a LOT of pics step by step on the reman job.
72ChevySWB4x4
Registered Member
wont know until I pick it up tommorow morning all i know is ists in a R.V. with 28k miles on the whole thing. guy says it has an "underdrive" on the back of it but I think its an e brake hes talkin about?
for sure..... great tip!
I just found out it is the fig8 which is the same as the one I got so I dont know if I wanna dump $450 on it un less thats a good deal pic and info on it on bottom.
thats the pic he sent me
I wanna join but I'm not sure if this info is more geared towards serious offroaders/crawlers...I'm not doing any doubler etc. just want my stock NP205 to work with newer mtr and trans. this truck will be a driver that sees some 4wd when I go hunting/fishing or take my son out for some fun in the mud No serious rock crawling etc.
chevy np 205 32spline that bolts right up to a th400 tranny. It has been totally rebuilt and has a billet aluminum kit from northwest offroad on it, which cost about $200 alone
need to know what style he has. thats the back pic. need pic of the front.
and what tranny do you have now ? you need a 205 from a 400 . or you need to machine the 205 case for bigger input bearing and get the input gear to swap in.
the case he has looks like a super deal for 450 with all thats done if it got a full reman. not just a degreas and seals and fresh overhall paint job.
as to 25 for the site to your needs. we have people here from no 4x4 at all to crazy builds. all kinds and all friendly.
and what tranny do you have now ? you need a 205 from a 400 . or you need to machine the 205 case for bigger input bearing and get the input gear to swap in.
the case he has looks like a super deal for 450 with all thats done if it got a full reman. not just a degreas and seals and fresh overhall paint job.
as to 25 for the site to your needs. we have people here from no 4x4 at all to crazy builds. all kinds and all friendly.
72ChevySWB4x4
Registered Member
I just found out it is the fig8 which is the same as the one I got so I dont know if I wanna dump $450 on it un less thats a good deal pic and info on it on bottom.
my truck CURRENTLY has a th350 with the fig8 np205
I'll check and see if its A FULL REMAN OR JUST THE SEALS ETC. but hell i figure if I get it for $450 it already has the 32 spline input shaft I hafta put in mine anyways and its 100 times nicer lookin with the raptor coat and billet.
as to 25 for the site to your needs. we have people here from no 4x4 at all to crazy builds. all kinds and all friendly.
you twisted my arm I'll join up DONE!
oh now dont blam me when you make friends and have fun .
ya if you got 27 spline from th350 now and need 32 spline then his all done up for 450 is good. but does it come with the adaptor ? if not there is another 200ish to buy up . not here much but on ebay for around that price. yours from the 350 setup wont work.
now a full member look here for my 4l80-e to 203 to 205 doubbler kit and reman i did. http://coloradok5.com/forums/showthread.php?t=253000 warning TON'S of pics.
72ChevySWB4x4
Registered Member
oh now dont blam me when you make friends and have fun .
hahahha its all good bro was just bustin your ballz
no adaptor
so i'm thinking I should just bite the bullet and buy the advance adaptors kit for $570 shipped and use my NP205....arrggghhh I guess it can wait un til I get back from my vacation...I was just wanting all the parts here for when I get back so I can tackle this swap head on
you werent kidding on the pics! nice write up I'll hafta read it thoroughly when I have more time.
link to the advanced adaptor kit please. need to make sure you get the right one.
and thay are a bit expensive also. and some kits down grade the shaft to the smaller 27 spline stuff.
just checked there site. $628 now. for 4l80-e swap kit to 205.
included aluminum copy of the gm iron adaptor. new input gear. and few parts.
with there kit you will prob have to machine out the tcase also. info on there site dosnt mention machine work.
just down loaded there instructions. REQUIRES machine work to fit. and also dosnt say anything about the rear freeze plug to swap to 4x4.
just a heads up on the kits and parts you are looking for.
best to get the tranny and post pics. then we or i can direct you in the right direction. can be done cheeper than the $628 kit. and you can sell your th350/205 combo to make back some money.
and thay are a bit expensive also. and some kits down grade the shaft to the smaller 27 spline stuff.
just checked there site. $628 now. for 4l80-e swap kit to 205.
included aluminum copy of the gm iron adaptor. new input gear. and few parts.
with there kit you will prob have to machine out the tcase also. info on there site dosnt mention machine work.
just down loaded there instructions. REQUIRES machine work to fit. and also dosnt say anything about the rear freeze plug to swap to 4x4.
just a heads up on the kits and parts you are looking for.
best to get the tranny and post pics. then we or i can direct you in the right direction. can be done cheeper than the $628 kit. and you can sell your th350/205 combo to make back some money.
72ChevySWB4x4
Registered Member
http://www.polyperformance.com/shop/GM-4L80E-Tranny-to-GM-NP205-T-Case-Adapter-Kit-p-20755.html
Ive got a quote for $570 shipped to me.... how difficult to machine the tcase and install the input gear on a scale of 1/10
I'm gunna call them and see how much just for the adaptor and pick up the redone tcase...I think
re read my post. i edited it.
Funny how this thread has been brought back up. I've got it saved to my favorites page.
Agreed, very, very helpful and detailed info. You won't find stuff like this on other sites.
Agreed, very, very helpful and detailed info. You won't find stuff like this on other sites.
72ChevySWB4x4
Registered Member
yah I will pick up the transmission in the morning and post some pics.... in the meanwhile I'm goin to grab that redone tcase and sell mine along with the motor to recoup some of my swap costs. Thanks for the help so far GREATLY appreciated.
told you worth the 25 bucks. 
stock gm unit for $230 free ship on ebay now.
check advanced adaptors price for aluminum unit.
stock gm unit for $230 free ship on ebay now.
check advanced adaptors price for aluminum unit.
Ditto from me, too!told you worth the 25 bucks.
72ChevySWB4x4
Registered Member
fyi you got a better deal than you think.
aftermarket flat flange front = about 100 bucks. and chances are its a swaped in 32 spline front output shaft.
looks like new shift rails and no link plate. = prob twin sticked. = around 120 for new modifyed rails.
even if its got bad parts worst case. you got a smokin deal for 400 bucks.
aftermarket flat flange front = about 100 bucks. and chances are its a swaped in 32 spline front output shaft.
looks like new shift rails and no link plate. = prob twin sticked. = around 120 for new modifyed rails.
even if its got bad parts worst case. you got a smokin deal for 400 bucks.
72ChevySWB4x4
Registered Member
link plate,cover,and bolts all came in a bag with it. I'm stoked!
I figured I could'nt have had mine redone with the billet kit & extra parts for that cheap and I will get decent $$ back out of mine with the th350 adaptor.... the name plate on mine looks brand new even though the case looks weathered almost like it was just replaced
