universal joint rear

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robertapy
Posts: 23
Joined: Wed Oct 10, 2012 2:12 am

universal joint rear

Post by robertapy »

i have a 9 inch rear with the stock v8 drive shaft..... the driveshaft universal measures 2 1/2 across and the 9 rear measures 3.25 across what universal joint do i use?....thanks in advance bob

popscomet
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Joined: Sat Jan 01, 2011 11:19 pm
Location: Jacksonville, Arkansas

Re: universal joint rear

Post by popscomet »

you might need the correct yoke for the pinion gear,,,,
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robertapy
Posts: 23
Joined: Wed Oct 10, 2012 2:12 am

Re: universal joint rear

Post by robertapy »

i found this....

https://www.dennysdriveshaft.com/p558_m ... ide_s.html


what do you think?

popscomet
Posts: 9689
Joined: Sat Jan 01, 2011 11:19 pm
Location: Jacksonville, Arkansas

Re: universal joint rear

Post by popscomet »

if that is the one you need it will work just fine,,,,we have used odd sized u-joints on our race cars in the past and never a problem,,,,,way back in the 60's ,OL POP used one when I installed a 1957 engine and tranny in my 1955 crown vic ,had to use the 57 frt yoke on the drive shaft,,,was a street driven car for yrs,,,,,,worked like a clock...good luck,,,pop
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pop/glenda

vicegrip
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Re: universal joint rear

Post by vicegrip »


redhotcomet
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Location: Saskatchewan, Canada

Re: universal joint rear

Post by redhotcomet »

Measure cap width and diameter and go down to Napa and ask for a conversion u joint and give them the measurements. Helps if you can take both u joints with you then they can measure them. I think I have a conversion joints on both ends of my driveshaft. T5 trans to police interceptor aluminum driveshaft to explorer 8.8 diff
1964 Caliente hardtop, 302/T5/8.8"

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Joe Travers
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Location: Louisiana

Re: universal joint rear

Post by Joe Travers »

^^^ what others have said.
You have to consider needle bearing cup diameter on the u-joints, as well when measuring.
There are two different cup sizes for the old 9" yokes, as far as I know. They are very close to the same size.
Very easy to mess this up, if you aren't precise.
Good hunting!

JT
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1963 1/2 Custom Hardtop
342 stroker, solid roller, T-10, 3.55 posi

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SASSY
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Re: universal joint rear

Post by SASSY »

Don't remember details, long ago, but have used cups from different crosses to get right measurements.
Was behind my Cleveland 4speed when I was drag racing and have never busted a u joint,,, dont be scared to experiment.
Fred
I'd rather do it myself if it's done right or not,,,isn't that what hotrodding is all about

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popscomet
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Joined: Sat Jan 01, 2011 11:19 pm
Location: Jacksonville, Arkansas

Re: universal joint rear

Post by popscomet »

lord yes !!! don't ever be scared to try anything on these old fords,,,,,they all are fixable,,,pop
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