Driveshafts??

[FLYNAVY30]

What are you guys running for a driveshaft with your swap? I was planning on just having my factory 2-piece shortened and the input for the 4L60e added. Just curious if anyone had done anything different like ordering a 1-piece aluminum or anything along those lines.

[wgeyer88]

I'm interested in this information as well. I'm about to have my 2-piece shortened and a 4l80e/th400 yoke installed. I've considered going to a 1-piece aluminum but I think it will be more expensive.

I've searched our local u-pull with the hopes that I will find something long enough with a th400 yoke installed. That way I can have that shortened instead of having an all new shaft built. The only problem is that all the driveshafts are bent from forklifts moving the vehicles around.

[FLYNAVY30]

yea, Ive got a good driveshaft....but after the cost of having it shortened, a new yoke installed, and rebalanced, Im curious how that will compare to a one piece aluminum shaft. Plus the added simplicity of not having the carrier bearing.

[truckdude239]

What tran are u running right now my truck was a factory 3 spped and the yoke for the 3 speed fit my old th350 and my 460le i paid 60 dollara to shorten mine

[eagleuh1]

Had mine shortened, balanced, new u-joints installed. Little over hundred bucks. Also installed new carrier bearing.

[FLYNAVY30]

mine had the th400 and the bigger drive shaft because mine's a C20

[wgeyer88]

FLYNAVY, wanna switch yokes? I had a TH350 so my yoke will work with a 4l60E and I need a th400 yoke for my new 4l80e.

[Billett]

I switched front yoke, replaced carrier, had it shortened and balanced for about $200. I looked into aluminum shafts, but no one would make a long enough one for my truck... I even offered to find a junk one from a newer truck but the shops I talked to wouldn't balance them if they were that long.

[Wasted Income]

The general consensus that I've seen around here, is that a 2wd LWB is too long for a 1 piece driveshaft. I'm sure someone will prove me wrong with their custom 5" dia deal, but for the most part, LWB trucks are better off with a 2 piece and carrier bearing.

I had a 4" 6061T6 driveshaft made for my blazer, with 1350 u-joints. Rated to 1500 hp

[BR3W CITY]

I've got a thick wall shaft for mine. Setup for the 4l80e->12bolt, rated to 800hp, and it was cheap.

[crazy longhorn]

Originally Posted by Wasted Income

The general consensus that I've seen around here, is that a 2wd LWB is too long for a 1 piece driveshaft. I'm sure someone will prove me wrong with their custom 5" dia deal, but for the most part, LWB trucks are better off with a 2 piece and carrier bearing.

I had a 4" 6061T6 driveshaft made for my blazer, with 1350 u-joints. Rated to 1500 hp

Totally agree....as you cross that 70-71" line, C to C on the U joints, that 1 pc shaft is too long? You can go larger diameter, & lower speeds to get it....or, I understand that a carbon fiber shaft, will take the length, but will be very pricey! Stick with the 3/4 or 1 ton , 2pc shaft....I have 1350 joints in mine, & have pounded the he!! out of it for many yrs. Longhorn

[Wasted Income]

I was surprised that my stock C-10 LWB steel 2 pc driveshaft held up to ~500 rwhp and MT Drag Radials.

The stock 250 I-6 put out 155 hp at the flywheel.....my turbo 5.3 was putting out around 600 at the flywheel...4 times the stock hp. Color me impressed. haha.

[crazy longhorn]

Originally Posted by Wasted Income

I was surprised that my stock C-10 LWB steel 2 pc driveshaft held up to ~500 rwhp and MT Drag Radials.

The stock 250 I-6 put out 155 hp at the flywheel.....my turbo 5.3 was putting out around 600 at the flywheel...4 times the stock hp. Color me impressed. haha.

That is impressive Longhorn

[tlorber]

Hey, Income Waster, can you give the specs on those wheels? They look sweet on that chassis.

[mattcrp1]

So does the 4l60e use a standard th350 yoke? I dont have a drive shaft to start with for my 76 SWB. I have had a drive shaft made in the past for a project and that was a scratch built and over $300.00.

[BR3W CITY]

Originally Posted by mattcrp1

So does the 4l60e use a standard th350 yoke? I dont have a drive shaft to start with for my 76 SWB. I have had a drive shaft made in the past for a project and that was a scratch built and over $300.00.

You got hosed unless the driveshaft was made thick-wall or something special (even then it seems pricy). I payed $180 for a scratch built thick-wall DS with ujoints, made in 3 days.

That said, it uses the same splines on the output shaft, with the 4l60e shaft being a tad longer (so it won't appear to go "in" ) all the way. 27 splines.

[mattcrp1]

I knew it was pricey, Bay Area pricing. It was the only shop in the area.