[DeTomaso] Advantages of CV Half Shafts?

Julian Kift julian_kift at hotmail.com
Thu Dec 26 22:52:44 EST 2019 

I was led to believe there isn't a huge difference in the weight between the two styles (with and without adapters) that Scott (SACC Restorations) offers. That said, I have a set of the with adapter style here I can weigh for comparison to Mike's numbers.

The difference (apart from the obvious cost) is also ease of installation of you don't want to be (or are not confident in) pulling your ZF side housings apart. Either way IMO the upgrade is on well worth the money, even more so if your half shafts require rebuilding and it starts to look really cheap if you've seen Pantera's where the half shaft u-joint has failed with resultant inner fender and/or ZF damage from a flailing half shaft.

Looks like Scott has some sale pricing in effect at the moment, so perhaps timing is right too!

Julian

________________________________
From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of Mike Drew via DeTomaso <detomaso at server.detomasolist.com>
Sent: Thursday, December 26, 2019 7:01 PM
To: Mike & Elizabeth Thomas <mbefthomas at comcast.net>
Cc: Detomaso List <detomaso at server.detomasolist.com>
Subject: Re: [DeTomaso] Advantages of CV Half Shafts?

Mike,

If you get the kind that require adapters to bolt them to the ZF and hub flanges, they are just as heavy as stock driveshafts, if not heavier.  If you get the kind that require different gearbox flanges, you have to partially dismantle the gearbox to fit them, but it saves a small amount of weight.

I actually have a set of those latter style from SACC restoration sitting here, along with stock driveshafts, and a postal scale. Perhaps I should get off my butt, no? :)

Stock:  18 lbs 13 oz

SACC CV:  13 lbs 6 oz

CV joints are smoother than Hooke-style U-joints. They can also tolerate greater articulation, although that isn’t a factor unless you choose to reposition the gearbox (say, by moving it rearward to accommodate a longer 460-based engine).

If I had no driveshafts at all, it would be difficult to justify $2300-2500 for CV vs $500-750 for stock-style. If I already had the stock ones and there wasn’t anything wrong with them, $2300-2500 seems very unnecessary. Having said that, I suspect they are capable of withstanding more power, so if I had 600-700 hp I might consider them a necessity. And, they are probably smoother going down the road.

I do think for 99% of us, it falls into the category of recreational spending.

Mike

Sent from my iPad

> On Dec 26, 2019, at 15:38, Mike & Elizabeth Thomas <mbefthomas at comcast.net> wrote:
>
>    One of the mods I'm considering for my restoration is a swap to CV half
>   shafts.  The prices have come down over the last few years.  What does
>   the group see as the advantages of these axles v/v u-joint half shafts,
>   besides weight.
>
>
>   Thanks
>
>   Mike Thomas
>
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>
>
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-------------- next part --------------
   I was led to believe there isn't a huge difference in the weight
   between the two styles (with and without adapters) that Scott (SACC
   Restorations) offers. That said, I have a set of the with adapter style
   here I can weigh for comparison to Mike's numbers.

   The difference (apart from the obvious cost) is also ease of
   installation of you don't want to be (or are not confident in) pulling
   your ZF side housings apart. Either way IMO the upgrade is on well
   worth the money, even more so if your half shafts require rebuilding
   and it starts to look really cheap if you've seen Pantera's where the
   half shaft u-joint has failed with resultant inner fender and/or ZF
   damage from a flailing half shaft.

   Looks like Scott has some sale pricing in effect at the moment, so
   perhaps timing is right too!

   Julian
     __________________________________________________________________

   From: DeTomaso <detomaso-bounces at server.detomasolist.com> on behalf of
   Mike Drew via DeTomaso <detomaso at server.detomasolist.com>
   Sent: Thursday, December 26, 2019 7:01 PM
   To: Mike & Elizabeth Thomas <mbefthomas at comcast.net>
   Cc: Detomaso List <detomaso at server.detomasolist.com>
   Subject: Re: [DeTomaso] Advantages of CV Half Shafts?

   Mike,
   If you get the kind that require adapters to bolt them to the ZF and
   hub flanges, they are just as heavy as stock driveshafts, if not
   heavier.  If you get the kind that require different gearbox flanges,
   you have to partially dismantle the gearbox to fit them, but it saves a
   small amount of weight.
   I actually have a set of those latter style from SACC restoration
   sitting here, along with stock driveshafts, and a postal scale. Perhaps
   I should get off my butt, no? :)
   Stock:  18 lbs 13 oz
   SACC CV:  13 lbs 6 oz
   CV joints are smoother than Hooke-style U-joints. They can also
   tolerate greater articulation, although that isn't a factor unless you
   choose to reposition the gearbox (say, by moving it rearward to
   accommodate a longer 460-based engine).
   If I had no driveshafts at all, it would be difficult to justify
   $2300-2500 for CV vs $500-750 for stock-style. If I already had the
   stock ones and there wasn't anything wrong with them, $2300-2500 seems
   very unnecessary. Having said that, I suspect they are capable of
   withstanding more power, so if I had 600-700 hp I might consider them a
   necessity. And, they are probably smoother going down the road.
   I do think for 99% of us, it falls into the category of recreational
   spending.
   Mike
   Sent from my iPad
   > On Dec 26, 2019, at 15:38, Mike & Elizabeth Thomas
   <mbefthomas at comcast.net> wrote:
   >
   >    One of the mods I'm considering for my restoration is a swap to CV
   half
   >   shafts.  The prices have come down over the last few years.  What
   does
   >   the group see as the advantages of these axles v/v u-joint half
   shafts,
   >   besides weight.
   >
   >
   >   Thanks
   >
   >   Mike Thomas
   >
   > _______________________________________________
   >
   >
   > Detomaso Email List is not managed by POCA
   > Posted emails must not exceed 1.5 Megabytes
   > DeTomaso mailing list
   > DeTomaso at server.detomasolist.com
   > [1]http://server.detomasolist.com/mailman/listinfo/detomaso
   >
   > To manage your subscription (change email address, unsubscribe, etc.)
   use the links above.
   >
   > Members who post to this list grant license to the list to forward
   any message posted here to all past, current, or future members of the
   list. They also grant the list owner permission to maintain an archive
   or approve the archiving of list messages.
   _______________________________________________
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