clipping 1st & 4th in GTR

[itbmils]

I have an R32 GTR and have just had a full engine rebuild done – part of the rebuild included a complete oil change. They changed my G'Box oil to Motul – and now I seem to be clipping gears.

It's not a full on crunch – just a minor clip selecting 1st and 4th (I can hear it – and also feel it through the stick). It's MUCH worse on the way down the box. Selecting 1st is interesting when sitting at the lights some times. Double clutching helps- and even with the pedal all the way to the floor – it will still clip some of the time. All other gears are fine.

I have NFI what oil was in the box b4 the Motul – but suspect the new oil is a lighter weight (I could be off track here tho)

talk to me – this seems like the syncos are failing to me – or should I be running with a heavier oil in this G'Box

[Abo Bob]

I love Motul engine oils but a lot of people around here swear by Redline Shockproof. I have heard many people say something like 'I put Redline in and the crunch went away'.

I have an auto though so you don't have to believe me.

[WetGTR]

Another one for the Redline - What an Oil.

The one you use is the lightweight shockproof MT90 75W90 you need close to 4 Litres. Cost @$120.00

Not cheap but it's worth every cent

[blur]

i have had the same problem in my gtr, i have just put in motul synthetic gear oil and noticed it crunch into first, although 4th used to crunch occasionally anyway.. seems to be worse when hot??? in all my other cars gearboxes i used castrol syntrans, never had a problem with that..

[JH32]

blur that was the same with mine ... had motul gearbox oil in there and it got worse when it got hot. i guess the oil just thinned out too much.

my solution was to replace the gearbox

[Duncan]

it might also be that the clutch fluid needs bleeding?

[dangerous_daveo]

I also have the motul oil... But I actually found the box to be smoother. But then I do have a crunch, but its when its cold... not hot. So god knows.

[09ONE_32]

I swear by redline shockproof. I couldn't engauge second gear above 3.5k for about 3months until I changed the fluid to redline. You need to take it easy on the box to "wear in" the new oil (or so I found) because it got smoother and smoother the more ks I covered.

[loz]

before i used lightweight shockproof in my R32 GTR it crunched in 3rd and 4th but once in its

great only had it in fo about 1000 ks but crunch went away that afternoon i drove it home