Confused....
Author
Discussion

l4jor

Original Poster:

210 posts

224 months

Saturday 24th November 2007
quotequote all
With all the talk about gearboxs on a topic recently posted, I checked my 05 Monaro(face lift) it has a MM6, Is this a bad gearbox? i'm confused.. whats the real world difference?

I've tried to find out the dark past of my car in relation to a replacemnt front offside wing/fender/mudguard. The car was registered by Vauxhall in September 2006.I bought the car in August of this year with 6000 miles on the clock. I contacted Vauxhall via telephone and E-mail, I contacted the dealer I purchased the car from, the answer was the same they can't help...
Surely someone can trace the history of the car? The registration number was KY56TMU,any taker's ?

greens vauxhall

830 posts

232 months

Saturday 24th November 2007
quotequote all
MM6 isnt a bad box, they are all a bit agricultural but pretty strong really.

granada203028

1,500 posts

220 months

Sunday 25th November 2007
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The difference is the shorter ratios. Every thing else is the same. I whole-heartedly recommend you change it. It really does enhance the car and for around £2K total is competitive with the costs of other mods. P/n 92155485 (TUET2066) www.gmpartsdirect.com listing it for just £1300, a quarter of what Vauxhall's want!

Island boy HSV

726 posts

262 months

Sunday 25th November 2007
quotequote all
granada203028 said:
The difference is the shorter ratios. Every thing else is the same. I whole-heartedly recommend you change it. It really does enhance the car and for around £2K total is competitive with the costs of other mods. P/n 92155485 (TUET2066) www.gmpartsdirect.com listing it for just £1300, a quarter of what Vauxhall's want!


Thats the price you pay for the part in USA, then you ship it. Say it costs £250 to get it here. You should then pay import duties of 3% and VAT of 17.5%

To add up the real cost

£1300+£250(shipping)+£340(import duty, customs fees and VAT)

Which gives you a total of £1890. The supplier will probably need you to return the box if you have any issues. I believe there are a few people who have had gearboxes replaced by Vauxhall because there were issues with them.

I have driven all the Monaro variants and there are much more significant difference's than the gear ratios. I have changed the diff ratio in my car from 3.73 to 3.91 which is much more noticeable than the variants in gearbox ratio.

Edited by Island boy HSV on Sunday 25th November 15:15

granada203028

1,500 posts

220 months

Sunday 25th November 2007
quotequote all
3.73 is approx 8% different and 3.91 13% over the standard 3.46. The gearbox differences vary between the actual gear selected but on average is about equivalent to a 3.91 diff. The gearbox spread is better with 2nd being 16% lower - great for exiting roundabouts. Gm/Holden themselves chose to change the gearbox rather than the diff. It is only because of a Vauxhall cock up that CV8s in Britain didn't have the box same as the VXR. They got the brochure right - just got the car wrong...

uk hsv

1,692 posts

276 months

Sunday 25th November 2007
quotequote all
granada203028 said:
a Vauxhall cock up that CV8s in Britain didn't have the box same as the VXR. They got the brochure right - just got the car wrong...


But you and others have said the box was used so the car would passed UK drive by noise regulations......how would that be a Co*k up? sounds like they used the most cost effective way of getting the updated CV8 into the country......