4L80e early design comparability

[stutaeng]

Current yoke

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[Dropped88]

On the 2 piece with a fixed yoke it slips at the 2nd shaft

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[stutaeng]

Great! Thanks everyone for your input.

Ok so I'm understanding this tranny will work for me? I'm having a hard time finding 2wd in my area, everyone I've found the last few weeks are 4x4s. I think you can convert them over, but that's over my head...

 

[stutaeng]

Well, I picked up the transmission. I did a bit of digging and the shift shaft can be swapped for a longer one. Here are some links/videos. I ordered the AC Delco # 24235194 and will try this soon. I'll be using the current safety neutral switch from 4L60e, assuming I don't break it to remove the switch. They are the same for both trannies.

https://www.performancetrucks.net/f...ension-22/5-3-early-model-4l80e-509384/page2/
https://www.summitracing.com/parts/ado-24235194

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The previous engine mated to the transmission was a 5.7 TBI (95 C2500 ECLB) and going to mating it a 5.7 Vortec. The torque converter should be fine, right?

Not sure what to do about yoke yet.

 

[df2x4]

The previous engine mated to the transmission was a 5.7 TBI (95 C2500 ECLB) and going to mating it a 5.7 Vortec. The torque converter should be fine, right?

Yeah, you'll be fine. I actually used the converter that came in my junkyard 4L80E (donor truck was a 5.7L) in my 4.3L truck. If you're moving it from one 5.7L to another you're good to go for sure.

 

[stutaeng]

Ok, so I was able to snap a photo of the yoke...I see a big nut at the end. I think that's called a "bolt-on" yoke?

I don't believe the 4L60e has this?

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[df2x4]

Yup, that's what my 80E has too.

 

[stutaeng]

Well guys, I took the shift shaft off, but the part that I listed previously was not the correct part. I have since ordered a shift shaft for a 00 K3500 and that appears to be the right one. AC Delco part number 24233978. Will try to swap it here soon. Removal was pretty easy.

I also took off the yoke and ordered a replacement that is supposed to work with my driveshaft, along with a Moog 290 U joint.

The problem now is that the new yoke is much longer that the one I took off. I tried on the tranny, but doesn't bottom out and sticks out too far out.

Any ideas?

 

[smdk2500]

Well guys, I took the shift shaft off, but the part that I listed previously was not the correct part. I have since ordered a shift shaft for a 00 K3500 and that appears to be the right one. AC Delco part number 24233978. Will try to swap it here soon. Removal was pretty easy.

I also took off the yoke and ordered a replacement that is supposed to work with my driveshaft, along with a Moog 290 U joint.

The problem now is that the new yoke is much longer that the one I took off. I tried on the tranny, but doesn't bottom out and sticks out too far out.

Any ideas?

My guess is that you will have to have the drive shaft shortened.

 

[stutaeng]

That's what I thought initially. However, the inside of the yoke has a little recess. And it sticks out way too much. I did a bit of digging and looks like there are like 5 different output shafts on this tranny! I removed the tailhousing and mine measured 6 1/4" and has that o ring.


I think I found the part that may work though:

https://www.dennysdriveshaft.com/p6..._slip_yoke_1310_series_32_splines_fits_t.html

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