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Old 06-30-2020, 08:01 PM   #1
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Location: Prattville, AL
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Drive shaft question

For some reason I cannot use the search feature when I use my phone
So please bear with me.

I did a LWB to SWB conversion and the drive shaft is now 12" to long. My question is should I shorten the two piece drive shaft or get a one peice drive shaft made?
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Old 06-30-2020, 08:12 PM   #2
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Re: Drive shaft question

I've done both. If I remember correctly you will need to shorten 11 3/8ths to retain the 2 pc. If you can get a one piece, you will never have to fool with the carrier bearing again. A big plus.
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Old 06-30-2020, 08:13 PM   #3
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Thumbs up Re: Drive shaft question

I would do the 1 piece. I have one in my 71 LWB truck.
1971 LWB Custom, 6.0LS & 4L80E, GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71

Upstate SC GM Truck Club
2013,14 and 2016 Hot Rod Pour Tour

Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
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Old 06-30-2020, 11:06 PM   #4
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Re: Drive shaft question

You should have shortened the frame in front of the crossmember that the rear control arms fasten to meaning that the driveshaft still pivots on the joint at that point. That in turn means you need to shorten the front half of the driveshaft.
Founding member of the too many projects, too little time and money club.

My ongoing truck projects:
48 Chev 3100 that will run a 292 Six.
71 GMC 2500 that is getting a Cad 500 transplant.
77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.
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Old 07-01-2020, 09:39 AM   #5
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Re: Drive shaft question

I got a 1310 one piece driveshaft off of ebay. Here

That one is for a Th400 yoke. You'll have to measure the length and confirm the yoke you need. I also had to removed the center support hanger. That driveshaft has done fairly well for me even with 500whp. No slicks yet.

-- Josh

OLD SKOOL-- 1970 C10. turbo 5.3/Th400/3.07 posi Build Thread
FARM TRUCK----1949 Chevrolet 3800 Power Wagon Hauler Build Thread

1998 C2500 - New daily

DM me if you can't see photos i posted
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