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Old 03-25-2018, 02:48 PM   #1
harrywt
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Default CV Joints on driveshafts

I seem to remember discussing this when I had IHPA build my driveshafts but when are CV joints a necessity. I have a basic SOA with stock lookimg springs andheavy duty maybe slight lift shackles. I have this memory of Jeff or Chad telling me that the CV joint wasn’t really necessary
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Old 03-26-2018, 06:08 AM   #2
Hondo
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Default Re: CV Joints on driveshafts

Here is drive shaft 101, more than you ever wanted to know about drive shafts. http://www.pirate4x4.com/tech/billav...ft/index2.html Basically it has to do with drive shaft angle. When it gets too steep and you start getting binding, or too much vibration, you need to go with a CV joint at the transfer case, which requires rotating the spring perches so the rear diff yoke points at the output yoke of the transfer case, plus ~ 1 degree down because the springs wrap a bit when driving. [url]
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1972 Real clean stock Scout II P/S, P/B, 345, T18, 3:73s
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Last edited by Hondo; 03-26-2018 at 06:18 AM..
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Old 03-26-2018, 09:17 AM   #3
harrywt
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Default Re: CV Joints on driveshafts

I will have to do all the calculations. Of course I was probably trying to save the cost of the CV joint but I wonder why it wasn't put more into my attention. I may not be remembering the "ask Jeff and/or Chad" part correctly.

I don't have any vibration issues even at freeway speeds here in Los Angeles. I genrally dont drive more than 55-60 mph anyway, 46 year old vehicle and probably only vehicle on the road that gets LESS mpg on the highway.

However I do a lot more freeway driving than ever before so I will think long and hard about a CV joint.

BTW, I had a 1970 with a 351C and Quadrajet that needed rebuilding constantly. Fun to blow doors on trans am's full of plastic fairings on sunset blvd back in the day
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