Phobos84

Yeah I didn't mention the spline count because I can't remember what is stock for a factory Dana 44. See I ordered a 1350 pinion yoke for a factory Corvette Dana 44. It turned out that when the shop that built my Dana 44 years ago put in 3.73 gears they changed the splines on the pinion. I didn't know that and I bought a very expensive yoke for it with the wrong spline count. So when I found out my mistake I bought another one and installed. So whatever spline it is supposed to have, I have a 1350 forged yoke for it sitting on my shelf collecting dust that came from Denny's Driveshaft. They wanted to charge me a re-stocking fee to return it, so now I have a 4130 forged paper weight.

WVZR-1

It would be very easy for the OP to do a shaft and use 1330 joints, I don't see a 1350 slip-yoke that matches the ZF, I'll look closer later, Many since the ZF OE isn't available and hasn't been for a couple decades use the slip-yoke I've suggested for the ZF and use a 1310/1330 conversion to mate it to the ZF.

@Phobos84 if you've a 1350 forged it could be an easy sell. Does it use straps and bolts or the u-bolts to secure the drive-shaft. I don't ever suggest a buy from Denny's 'NEVER'!!

***If it's 29 spline it could also do likely the D60 & D70. I'd think it an easy sell in your part of the country. Is it boxed still? Do you recall the part #? An invoice from Denny's?

TA

I've seen half shafts twist like that, but never a drive shaft.

vett383

Thank you everyone for your input and information. i am pretty sure my stock shaft is 27" long. i think i will just put a 2.5" steel in it for now and try and survive the season. thinking this winter a solid axle might be needed as this was "step one" in the build and i couldn't even get 60 feet out of it lol. i do not want to invest into the D44 just to take it apart this winter and start over. probably just run hard tire for right now as well lol.

I do agree i think my driveshaft was compromised somehow and with the new found HP just could not hold up because a u-joint or a half shaft should have went first.

vett383

yup, half shafts are fine, go figure lol

Phobos84

So I bought a 29 spline yoke. This one in fact.



Then I found out that my Dana 44 had a 26 spline. The reason is that when the shop put in 3.73 gears they put in a pinion with 26 splines. So I just ordered another forged yoke for 26 splines an 1350 u joints.

Anyway I was always under the impression that the ZF6 and the 4+3 used the same driveshaft and yoke. Is that not the case?

383vett

That is an ugly driveshaft. I'm running a steel one in my car. What were your 60' times? I like your name by the way.

Krusty84

I bet you are making 500+ chp. 400+ at the wheel.

vett383

haha likewise, I promise I did not copy from yours.
no idea on 60 ft times, this happen on the first pass the first time i had the new build to the track. only made it about 10' lol.

vett383

man i would faint if this made 500CHP lol. probably worth a trip to the dyno to see for sure and to dial in the tune.

Krusty84

Mine is a LQ9 6.0 with LS3 heads/intake at about 10.5:1, 220/224 .575/.575 112 cam, 1-7/8" long tube headers, 3" mandrel exhaust, 25% underdrive pulley and a 5spd TKO 600 trans. Made 420 whp on the dyno and with a little more tuning/tweaks it trapped 126 mph which indicates about 435 whp at my weight. 6.0s make really good power with cam upgrades and supporting mods. 500chp is pretty easy.

ctmccloskey

Hello again Phobos84!

Are those U-joint straps the same as the ones used on the small block C3's? On my 1968 C3 there are machined Blocks in place of the straps and they were done to help with the extra power of the Big blocks. You clearly have the power to need them on that Beast of yours.

Thanks for sharing the pictures with us!

Phobos84

I can't answer that to be honest. I never had the opportunity to work on anything with a big block. But most all of the aftermarket 1350 yokes are made for straps like in the pic instead of the bolts with the flat style strap.

vett383

sounds like a pretty healthy setup. is this in a C4?
I am running a LQ4 with about 10:1 compression, 317 heads(shaved 0.030), 231/242 0.600/0.600 113+3, shorty headers (as i cannot find any long tubes that will work) 2.5" mandrel exhaust. Using a C6 Z06 clutch/flywheel attached to the C4 ZF6-40 6-speed.

i have not been able to make a pass with the new setup but my old 383 with a 100 shot NOS ran a 11.9@121 MPH and never had driveline issues lol

Krusty84

Yes. 1984 C4.
Best of 11.62 @ 126.33 w/ 2.08 60ft

Last time at the track I also broke my driveshaft. Well, broke a u-joint and ultimately trashed the driveshaft. Broke on the 1-2 shift and didn't get a slip. Dragy showed 1.88 to the 60 though so I likely would have been on pace for an 11.20 or so.

The exhaust might be holding you back some but I would still expect around 400 whp with your setup. Probably an easy 15 hp on the table if you can find a set of long tube headers that will work. Mine has a cheap set of C5 headers that are reworked at the collector to fit. Regularly found on Ebay or Amazon for $200-$300.

hookedup

I was warned that 'Dead Hooking' a C4 with stock a rear rwould only lead to a lot of aluminum scrap, it did. Broke everything behind the flywheel at some point until installing a 9".

vett383

might be worth a try down the road, i just didn't want to keep buying headers trying to figure it out lol. i know my build leaves plenty on the table between the exhaust and head but i wanted to focus on converting the car to LS more so than a true engine build. after last weekend i think my focus needs to be more on the rest of the car hahah. thank you for the info as well.

Thats a pretty good time especially with a 2.06 short time. my best run was a 11.97@121 with a 1.8 short. that was with the old 383 SBC though.

vett383

yup i believe that, the tires hooked for sure and the engine did not give up lol. looking at the data it only bogged the engine about 500 RPM. of course the driveshaft probably helped keep the RPM up some lol.

vett383

I am getting serious about a solid axle this winter, the only thing i do not have a good solution for is how to mount the rear of the tranny. do you have any pics of how you did yours just as a reference?

Thanks

Tom400CFI

383vette, rklsdriver c409, and tpi 421 vette should all have good pics/knowledge of the solid axle conversion. Note, though, that rklsdriver went into the 9's, I believe, on his IRS before switching.