[D-Ranged]

Just came out for a run in the GTR and while driving noticed a slight judder when doing slow turns.

When i got home and i was getting the car on the drive it was alot worse, either left or right when i turned the car from a stop there is a juddering and grinding noise/feeling and it feels a bit stiff.

Has my rear diff died?

I changed the oil on the rear diff today, surely that couldn't have done it?

 

[AlexJ]

Did you use LSD diff oil?

 

[D-Ranged]

No just some fuchs diff oil, i don't have a vspec

 

[AlexJ]

Standard r33 gtr rear diff? That's a plate diff and needs friction modifier, no harm done, either change the oil for lsd oil or add a shot of friction modifier.

 

[Mookistar]

Yeah. I had the same. Change the diff oil.

 

[Mookistar]

http://www.gtr.co.uk/forum/133193-judder-rear-during-pull-away-low-speed-manouvres.html

 

[D-Ranged]

Really? So it should be fine then? I thought the standard r33 gtr diff was not a lsd?

 

[Mookistar]

Cross posted. Click that link

 

[D-Ranged]

Thanks guys, I was just about to set it on fire! I have a bloody misfire on boost now as well. in 3rd 4th and 5th. Tried bcpr7es and bcr8es plugs which made no difference! It's winding me up after all the work I've put into it!

Any recommendations on oil for the diff?

 

[AlexJ]

Try some Motul GEAR 300 LS 75W-90 any LSD specific oil will do though.

Re the misfire; coilpacks or ignitor maybe?

 

[D-Ranged]

Try some Motul GEAR 300 LS 75W-90 any LSD specific oil will do though.

Re the misfire; coilpacks or ignitor maybe?

Ok thanks mate!

Coil packs are low mileage split fires, I also have a do luck ignition wire kit. It could be the ignitor though.

Going to drop the gap on my plugs tommorrow to see if that fixes it they are 0.8 at the moment.

 

[ShopGTR]

Drop the gap on the 7's. Don't use the 8's.

 

[Phil69]

Just a thought but is it definitely a misfire?.....Is it possible it could be pre-det? I only ask because as the weather/air is becoming warmer, mine was starting to pre-det and I had to turn the boost down slightly to prevent it.

 

[D-Ranged]

Just a thought but is it definitely a misfire?.....Is it possible it could be pre-det? I only ask because as the weather/air is becoming warmer, mine was starting to pre-det and I had to turn the boost down slightly to prevent it.

It's when the air is colder it's doing it, e.g at night time. It shouldn't be det it was only mapped on Wednesday! AFR is fine too.

 

[D-Ranged]

Drop the gap on the 7's. Don't use the 8's.

Ok mate will give them a go, didn't really like using those 8s they are a bit shorter.

 

[TommyGTRLSX]

I had 6 month old yellow jackets breakdown so don't rule it out :-(