What to do when car spits out 3rd & 4th

[SeriesIIGTST]

Hi all,

I was out today busy crusing around in my car. Decided to accelerate onto the freeway, left it in 3rd and buried the throttle, got to about 5,500, shifted to 4th, bit of a crunching noise then revs, i clutched back in, went to 5th, car went fine, went back to 4th, nothing, 3rd, nothing, 5th, drive.

Long story short, I no longer have 3rd or 4th gear and need to correct this situation.

I figure I've got a couple of options

1) 2nd hand gearbox

2) Rebuild

One of my friends has suggested a Pfitzner? set apparently made in SA. Don't know much about these. Where in perth can you go to get a gearbox rebuilt? Anyone recommend any places? I'm leaning towards a rebuild as that way I know the exact condition of the box. It may also be a selector and not the gears themselves (fingers crossed) but I won't know til i've got the box apart.

Cheers for any help you can give me.

[G0DF4Th3R]

my neighbours got a straight cut gearbox of some variety and fark its loud.. whines like Paul when Aidwin wont put out

[GTS-t VSPEC]

Dave, Sorry to hear mate:( As you know I've recently purchased a replacement 2nd-hand box. The cost of the gearset replacements, i.e. OS Giken Pfitzner etc were too much $$$.

Let me know what you get quoted for the gearbox rebuild, we priced it up and it didn't workout to be worthwhile:(

Bam, :slap:

[Gav]

Pfitzner website is here:

http://www.ppgearbox.com.au/

very nice products at an appropriate price - you get what you pay for. Don't expect much change from $8k by the time you fit the box.

[Cake]

hey dave sorry to hear that

hopefully it is not the gears you have lost... you would have had to been very brutal with it to kill gears in a 25 box. i have mates using 25 boxes that drift in comps and theyre still going after a long time. whats the sound like when you select 3rd and 4th and release the clutch? if theyre smashed u will probably be hearing lots of grinding.

[SeriesIIGTST]

no grinding, no nothing. I put it in 3rd or 4th with absolutely no resistence. Let the clutch out and the car acts like it's in neutral. No grinding. Basically, it's not even selecting the gear despite the gearstick position.

Paul, will definitely let you know if it comes down to a rebuild. Gav, thanks for the link. If it's going to be that expensive, a 2nd hand box will definitely prevail as the solution.

[Guest]

Well to start one of the part owners lives here in Perth and X-Speed sells all the bits,

PPG make three types including a quiet street Helical cut set,

Best bet would be email Simon at [email protected] and ask him for the different options for your box.

Im putting one in my next car, the Stagea has an auto so I have to wait.

I figure I've got a couple of options

1) 2nd hand gearbox

2) Rebuild

One of my friends has suggested a Pfitzner? set apparently made in SA. Don't know much about these. Where in perth can you go to get a gearbox rebuilt? Anyone recommend any places? I'm leaning towards a rebuild as that way I know the exact condition of the box. It may also be a selector and not the gears themselves (fingers crossed) but I won't know til i've got the box apart.

Cheers for any help you can give me.

[SteveL]

Most likely you've broken the 3rd/4th shift fork.

[72GT]

Most likely you've broken the 3rd/4th shift fork.

I gotta agree. Get it opened up and looked at before making any wallet lightening decisions, you may only need a fix rather than a rebuild....a lot less money!

[G0DF4Th3R]

i remember reading on the WA forums, one of the guys had a problem similar to this.. turned out to be an easy fix... (well compared to rebuilding a box that is)

get it checked out first before ordering ure sequential gearbox

[SeriesIIGTST]

Righto, got the gearbox out this morning. Haven't taken it apart but when we cyphened out the oil into a container, we found a piece of selector fork. Hopefully as it's been breaking, it hasn't crunched my gears up too badly. Will keep you all posted.

Cheers for the responses.

[SeriesIIGTST]

I have attached the bit that we pulled out of the gearbox oil this morning. Haven't got the box apart cause i don't have the right tools here at home. Doesn't look like a gear tooth but resembles more the selector fork I think.

[SteveL]

I have attached the bit that we pulled out of the gearbox oil this morning. Haven't got the box apart cause i don't have the right tools here at home. Doesn't look like a gear tooth but resembles more the selector fork I think.

Definately part of a selector fork...you can see the bronze inserts which are used where the fork engages the selector ring groove. The inserts provide wear resistance because the fork itself is cast aluminium alloy. The rest of the gearbox should be OK, but will need close inspection (I'd be looking closely at the condition of the 1/2 selector fork in your case).......you must be doing some 'hard' shifts

If you decide to replace the broken fork, let us know the cost.

[SeriesIIGTST]

Hi again

Thanks for the replies. Indeed many of you were right on the money saying it was the selector fork. Attached is a photo of my 3rd/4th gear selector fork. $125 later and overnight shipping for melbourne and I should be back on the road again!

Save buckets by doing the tough stuff myself. Also on the bright side, my bearings are good and my gears look great

Cheers!

[SteveL]

Ah well that's not too bad...better than $1K+ for a S/H gb. Is the fork a new one for that price ??

Hi again

Thanks for the replies. Indeed many of you were right on the money saying it was the selector fork. Attached is a photo of my 3rd/4th gear selector fork. $125 later and overnight shipping for melbourne and I should be back on the road again!

Save buckets by doing the tough stuff myself. Also on the bright side, my bearings are good and my gears look great

Cheers!

[SeriesIIGTST]

Yeah, straight from Nissan. Trade prices

[SteveL]

Yeah, straight from Nissan. Trade prices

Yeh, trade is good

Sent you a PM.