Manual 4l80e

stepside

stepside

Well-Known Member
I did convert 4l80e to full manual
I used this instructions
https://drive.google.com/file/d/1y3bQQaBHk5HwgmHHMR7WVgtY3JKzvXTl/view?usp=drivesdk
My transfer case started to stuck to lo range,so i disaited to do trans swap and check the transfer case
So i did basic overhaul to trans,dual feed and mods
I used transco separator plate but didint drill feed holes because trans is allways full pressure
Then transfer case,shift fork was worn and needle bearings and case was toast
I didnt find any parts for transfer case
But had np 241c transfe case in garage,its newer model with driver side drive shaft ,i modified oilpump pickup ,breather tube and bolted it upside down in trans
Transmission works great shifts are firm but not hard
And i did swap outside ,-25celcius jack didint work so i used chain blocks to lift trans up
IMG_20190124_211406.jpg IMG_20190124_211449.jpg IMG_20190124_211425.jpg IMG_20190124_211721.jpg IMG_20190125_153624.jpg IMG_20190125_195508.jpg
 
I can,t access the link?

Question about flexplate

Is the 168-tooth flexplate stock for 1985? I seem to get different finds on my own search. It needs to be externally balanced for my 383 [for 1985 Corvette auto trans - new short block w/ 400 crank] Appreciate the help
garage.grumpysperformance.com

4L80E FAQ – Jake’s Performance

www.jakesperformance.com www.jakesperformance.com
how do you control the manual shifts?
example what shifter is used? PICTURES?
https://www.summitracing.com/parts/hup-hd25-1


4L60E-Pan-Identification.jpg
https://cdn.shopify.com/s/files/1/2716/4086/files/Trans_Line_Kit_Instructions.pdf
translien.png

reading these links and sub links will help

4l80edf.webp

-6 x 1/4NPS is the correct size for GM turbo 350, Turbo 400, 700R4, 4L60E and many other GM transmissions. These have a straight thread and seal on the gasket.
The case thread size is 1/4 in.-18 NPSM (straight thread)
but there are adapter fittings allowing larger line sizes, that flow with less restriction

http://garage.grumpysperformance.co...fo-and-derale-trans-cool-pans.662/#post-95370
http://garage.grumpysperformance.co...oosing-an-engine-oil-cooler.15375/#post-90261
http://garage.grumpysperformance.co...ns-cooler-install-on-lincoln-navigator.15604/
http://garage.grumpysperformance.co...ubing-fuel-lines-and-flaring.1030/#post-35905
http://garage.grumpysperformance.co...sion-and-oil-cooler-increases-durability.176/

related threads and info

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/5035491/1

https://precisionperformance.com/product/kwik-shift-i-manual-shifter/#transmission

https://www.polyperformance.com/art-carr-winters-shifter

http://www.jakesperformance.com/trans-compare/

http://garage.grumpysperformance.co...ience-converting-a-4l80e-to-full-manual.5579/

http://garage.grumpysperformance.co...of-you-smarter-guys-give-me-ideas-here.14736/
 
Last edited:
stepside said:
I did convert 4l80e to full manual
I used this instructions
https://drive.google.com/file/d/1y3bQQaBHk5HwgmHHMR7WVgtY3JKzvXTl/view?usp=drivesdk
My transfer case started to stuck to lo range,so i disaited to do trans swap and check the transfer case
So i did basic overhaul to trans,dual feed and mods
I used transco separator plate but didint drill feed holes because trans is allways full pressure
Then transfer case,shift fork was worn and needle bearings and case was toast
I didnt find any parts for transfer case
But had np 241c transfe case in garage,its newer model with driver side drive shaft ,i modified oilpump pickup ,breather tube and bolted it upside down in trans
Transmission works great shifts are firm but not hard
And i did swap outside ,-25celcius jack didint work so i used chain blocks to lift trans up
View attachment 11468 View attachment 11469 View attachment 11470 View attachment 11471 View attachment 11472 View attachment 11473
Click to expand...
Nice Work.
The Transfer case You used a 241C to mate up to a 4L80E with correct adapter plate is Rare Now.
What I bought last year to Turbo 400 swap into my 1994 K1500 Suburban.
Made Just a few years that Transfer case.
Found mine in Pennsylvania on Ebay & bought it.
Got the right TH400 to 241C Large input adapter plate too.

Never seen a trans & transfer case installed with chain blocks.

Those floor jacks don't work well in the cold here either at 0 degrees F & colder.
I worked many times you did..in the snow on my back. No Fun.

Getting down to -24F or -25F here next week.
High daytime of -9F degrees .
 
I'v been driving 700 kilometers now ,trans works great ,and hacked 241 transfer case doesn't heat so i gess oiling is working,
But i drove 100 kilometers behind semi truck in snow storm and my intercooler got frozen engine bay full of snow
No boost and exhaust temps are high
 
stepside said:
I'v been driving 700 kilometers now ,trans works great ,and hacked 241 transfer case doesn't heat so i gess oiling is working,
But i drove 100 kilometers behind semi truck in snow storm and my intercooler got frozen engine bay full of snow
No boost and exhaust temps are high
Click to expand...
Need a Torpedo heater.
A Rosebud Torch too.
Melt that snow.
I worked in -27 F temps today for 9 hours.
Sleep 4 hours.
Go do it again for 12 hrs.
Same again tonight. -25 to -28 F air temps.
 
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