GQ NOISEY GEAR BOX

Post by **smidy5** » Thu Apr 02, 2009 8:08 pm

HI JUST PICKED UP MY NEW 4X4 IS A 90 MODEL GQ 5 SPEED
IT MAKES A GRINDING NOISE IN 5TH AND IN 3RD WHEN IM JUST LIGHTLY ON THE THROTLE WHAT COULD IT BE

Post by **IN24BZ** » Thu Apr 02, 2009 8:31 pm

you might find you can get it to do it in most gears if you try hard enough , its a chattery kinda noise? thats pretty standard

Post by **NutterGQ** » Mon Apr 06, 2009 6:03 pm

is it an RB30 or RD28 by any chance?

Post by **T_Diesel** » Mon Apr 06, 2009 9:25 pm

Sounds like your cluster gear bearings are shot which is probably not what you wanted to hear.

When the bearings wear, they pit the shaft and inside the gear causing a grinding (winding) sound. Eventually the bearings will break up and make a loud clicking sound. It's not apparent in 4th gear because that is the only gear that doesn’t put any load on the cluster gear and shaft. 4th drives straight through the mainshaft, eg 1:1 ratio.

This could be quite an expensive operation to repair because the whole gear, shaft and bearings would need to be replaced. A good second hand box or recon changeover could be a cheaper option.

Post by **T_Diesel** » Mon Apr 06, 2009 9:30 pm

NutterGQ wrote:is it an RB30 or RD28 by any chance?

Was the RB30 out in 1990?

I know the RD28T wasn't released until later possibly 1995?

Post by **rotate_gq** » Tue Apr 07, 2009 3:32 pm

Yeah, they were out in 1990. Mines a 90' model and has a factory fitted thirty.

Post by **HIKFRD** » Tue Apr 07, 2009 3:36 pm

i also have a 90 model with an RB30
when i got it was very noisey in 5th and 3rd
i have put another box in it but even that is a little noisey in 5th :(

Post by **NutterGQ** » Tue Apr 07, 2009 5:16 pm

yeah RB30 released in 90' and very prone to 3rd and 5th noise, actually blown a few up now lol

Post by **smidy5** » Tue Apr 07, 2009 5:45 pm

is rebuild an option or just get a change over for $1600

Post by **NutterGQ** » Wed Apr 08, 2009 12:59 pm

the change over will be rebuilt, just depends on how well......dont get change over from wreckers though there are gearbox places doing them for that kind of money properly.

Post by **T_Diesel** » Wed Apr 08, 2009 1:45 pm

smidy5 wrote:is rebuild an option or just get a change over for $1600

Rebuild is definately an option if you have been quoted $1,600 for a change over. Depending on how much money you want to throw at it, you could probably find a second hand box of speculative quality for a few hundred on EBAY. I am pretty sure the VL commodore had the same box in it as the RB30 patrols.

Post by **NutterGQ** » Wed Apr 08, 2009 3:22 pm

the VL MX7 turbo box is similar internally but worth twice the price of a pooey box and not interchangable with transfer etc, I pay from $150-400 for complete boxes when I blow them up.

There are a few places rebuilding these with warranty now for around $1500.00

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GQ NOISEY GEAR BOX

GQ NOISEY GEAR BOX

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