R32 Gtr Gearbox Running Wierd/hot

[funkymonkey]

Everytime I do a highway drive longer than 100km... so steady speed of about 100km/h at a touch under 3000RPM... my gear shifter heats up like a mofo, to the point where the rubber guard that sits on top of the shifter has had to have been replaced twice in the last year as it just warps and oil splashes out. The gears also get harder to shift into when it gets really hot. Anyone got any idea what's goin on in there?

What's the temp its supposed to run? I was thinking of running a trans oil cooler of some sort to try and get the temp down a bit. Anyone got any recommendations?

[hrd-hr30]

basics first. are you using the correct grade oil? is it full?

[funkymonkey]

Running Dextron 3 and yes its full.

[hrd-hr30]

that explains it. Dexron III is ATF -Automatic Transmission Fluid. Should only be used in the transfer case, not the gearbox. Gearbox should be 75W-90 hypoid gear oil.

[funkymonkey]

ah crap... sorry... dextron 3 in the attesa system. castrol syntec 75W-90 in the gearbox

my bad typed the first thing on the receipt I had from the last fluid change.

[Jmaac]

Have you got that plate on that prevents the heat coming up from around the gearstick surround?

[funkymonkey]

plate? you mean the rubber thing that goes around the gearstick and the metal ring/bracket that holds it down?

[Beer Baron]

funky you don't want dexron 3 in the attesa system either. you want nissan matic d in there, dexron 3 in the transfer case, and manual gear oil in the gearbox (oh, but I don't think that has anything to do with your problem. regular ATF and nissan matic D are pretty much the same thing anyway).

I would possibly try changing to a better GB oil. We all know friction causes heat and low qual oil allows more friction.

[BHDave]

Just throwing out stupid ideas 1 and 2 for the day;

Your exhaust isn't resting against the box by any chance? You still have the heat sheild around the cat and your cruise mixtures are ok and not lean (causing excessive exhaust temp)?

Where does the gearstick sit in relation to the transfer case in a gtr? Could the problem be in the transfer case? is the attessa constantly slipping in regular driving? same size wheels front and rear?

[funkymonkey]

richard... really? I've always used dexron 3 in the attesa... any harm in using it over nissan matic d?

yeah was considering trying redline, n seeing how it does. strange thing is I used to run the same oil in my old GTR and it didn't get that hot.

BHDave: cruise mixtures are around stoich, and exhaust isn't resting against the gearbox. no slip in attesa, same sized stock R32 GTR wheels front and back with the same sized tyres at the same pressure.

[N1GTR]

You have a GTR now? How many cars is it now - 8?

[funkymonkey]

used to have an R32 GTR... sold that... got an R32 GTS4 now with a GTR gearbox and GTS4 gears. current car count is down to a respectable 3

[godzl1975]

http://cgi.ebay.com.au/NISMO-TRANSMISSION-...1QQcmdZViewItem

check this item, might help?

[funkymonkey]

interesting.. that would be a patch remedy though... i'd rather sort the problem out. definitely will look into buying one of those if I can't sort this out buy changing OEM parts etc.

[N1GTR]

used to have an R32 GTR... sold that... got an R32 GTS4 now with a GTR gearbox and GTS4 gears. current car count is down to a respectable 3

Oh, 3 cars in one go isnt too bad