Swapping a VLSD into your Z31

[james]

good information in this topic

for me so far Z32 NA has worked perfectly for Making the axles outlined in method 5

( for my 85 T i am expecting to have to weld the inner cv race from the diff side further in to make the axles short enough to be used without changing the companion flange )

I am yet to put the VLSD carrier into the longnose R200 & hope to provide a more definite drawing of where the grooves need to be cut on the diff side 5 bolt output flanges. and how far the need to be shortened.

my question > has anybody used the Short nose R200 finned cover on the Long nose diff housing ? I don't have my long nose diff removed from the car as yet to find out.

Is there any benefit to using the finned cover > surely diff cooling would be better than the normal Z31 diff cover ?

[Racinjitter]

james wrote: my question > has anybody used the Short nose R200 finned cover on the Long nose diff housing ? I don't have my long nose diff removed from the car as yet to find out.Yes, it will require a custom mount as the diff cover mount bolts are in a different location, however the cover to housing bolt locations are the same.

james wrote: Is there any benefit to using the finned cover > surely diff cooling would be better than the normal Z31 diff cover ?

The main difference is cooling and extra fluid for cooling.

[james]

perfect thanks Racinjitter

[PurePontiacKid]

I'm almost done with this swap, and I have a question concerning the axles:

I'm going with the tri-BDO axles, and I was wondering if I should use the spring that goes inside the stock outer tripod CV or just leave it out?

[Bremsen]

Mike_GruiZinga wrote: The swap consists of installing your Z31 ring gear onto the VLSD carrier and then installing the VLSD carrier into your differential housing.

OK, this may be a stupid question but I don't want to guess. Is the pinion gear on the R200V adaptable at all to the long-nose housing? Just wondering if there is the option to use the 3:91 r/p. I know the 88/89 NA had a 3:91 (and I'm kicking myself for not grabbing it at the pap when I had the chance) but was wondering if this might be an option as well. I can't quite tell from the one pinion picture I found.

[ShamWow]

^^ I think you need to use the spring.

^The shortnose R&P will not swap into the longnose. You have to use a gearset for the longnose diff.

[Careless]

Mike_GruiZinga wrote: ^^ I think you need to use the spring.

^The shortnose R&P will not swap into the longnose. You have to use a gearset for the longnose diff.

can't you use the Pinion from the long nose and the Ring from the short-nose?

[85NA2T]

I don't think so.I don't think the teeth would mesh properly? Meh Idk

[Bremsen]

Mike_GruiZinga wrote: The shortnose R&P will not swap into the longnose. You have to use a gearset for the longnose diff.

That's kinda what I figured, Thanks!!

[Racinjitter]

[quote]Careless wrote:

^^ I think you need to use the spring.

^The shortnose R&P will not swap into the longnose. You have to use a gearset for the longnose diff.
can't you use the Pinion from the long nose and the Ring from the short-nose?

You dont want an unmatched ring and pinion set... Will be nothing but issues.

[88sinZ]

[quote]Racinjitter wrote:

can't you use the Pinion from the long nose and the Ring from the short-nose?You dont want an unmatched ring and pinion set... Will be nothing but issues.

To elaborate, the bite of the gears over many Mi/Km wears a seat in the gear teeth. Mismatching sets that have been used conflicts with the pattern and wears quickly.

New set? maybe a possibility...

[Careless]

ok, so since you can buy the Ring from Nissan, and you can buy the Pinion from nissan (and they don't come matched)... Shouldn't be buying a new long nose ring, and buying a new long nose pinion work much the same as they're unused so they will wear into eachother anyways?

[Racinjitter]

If they are the same exact pitch, depth, taper and twist... They might work. Long nose will work with long nose parts.

[Careless]

Racinjitter wrote: If they are the same exact pitch, depth, taper and twist... They might work. Long nose will work with long nose parts.

sorry, i meant new long nose ring, and new short nose pinion.
I've seen them sold separately and they can be had separately from Nissan.

A driveline shop with the proper marking and setting tools should be able to tell if they're compatible with the proper paint marking technique, shouldn't they?

[Gregmatic]

I didn't think they were still available.