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Fancy a 6 Speed Gearbox? here's how

DaveM
Posts: 75
Joined: Thu Oct 27, 2016 3:36 pm
Location: Haslemere, UK

Fancy a 6 Speed Gearbox? here's how

Post by DaveM »

Attached is a basic guide detailing the steps required to install a Mazda RX8 6 speed gearbox into your daimler
Mazda 6 Speed Gearbox Conversion.pdf
(2.48 MiB) Downloaded 510 times
Enjoy

Cheers Dave

classiclife
Classic Wise Man
Classic Wise Man
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Joined: Wed Sep 05, 2018 9:55 am
Location: Ridgewood - East Sussex
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Re: Fancy a 6 Speed Gearbox? here's how

Post by classiclife »

Hello Dave,

Just read your excellent pdf article, I could write loads of glowing sentences but four words will sum it up; "just brilliant - well done" !!

The fibre glass forming is of particular interest.

Thank you for sharing your project.

Regards.

Richard.
1968 Daimler V8-250 Saloon
DLOC East Sussex Branch Secretary
DLOC 2.5L V8 & V8-250 Registrar - https://www.dloc.org.uk/v8-250
DLOC 2024 International Rally - https://www.dloc.org.uk/rally-2024

User avatar
JohnM
Posts: 206
Joined: Thu Feb 11, 2016 1:31 pm
Location: N W London

Re: Fancy a 6 Speed Gearbox? here's how

Post by JohnM »

Couldn't have put it better myself, Richard!

Great job and great write-up, Dave!

many thanks, John
John M in Middlesex, NW London
1962 SP250 "B" Spec
DLOC Herts Region Sec

Barrie
Posts: 292
Joined: Mon Feb 29, 2016 11:50 pm
Location: Sydenham Hill SE London

Re: Fancy a 6 Speed Gearbox? here's how

Post by Barrie »

Fantastic achievement - well done!
Can you let us know what mph you get per 1000 rpm in top gear?
Thanks and great work.

Ian Slade
Wise Man
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Re: Fancy a 6 Speed Gearbox? here's how

Post by Ian Slade »

Well we have gone from 4 speed + overdrive through 5 speed Japanese boxes to 6 speed Japanese box, the next step must be a 7 or 9 speed ZF auto box
Owner since the 70's, Genghis is slightly to my left.

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JohnM
Posts: 206
Joined: Thu Feb 11, 2016 1:31 pm
Location: N W London

Re: Fancy a 6 Speed Gearbox? here's how

Post by JohnM »

Dave,
slightly off-topic, but shown on your writeup, - is that Robert Grinter's rear telescopic shock absorber beam you've fitted and modified for ARB, or your own design?

John
John M in Middlesex, NW London
1962 SP250 "B" Spec
DLOC Herts Region Sec

DaveM
Posts: 75
Joined: Thu Oct 27, 2016 3:36 pm
Location: Haslemere, UK

Re: Fancy a 6 Speed Gearbox? here's how

Post by DaveM »

Thanks a lot for the kind comments so far

I'll make a note of the mph/revs when I'm out next time on a flat bit of road

Rear end is a bit of both, I bought Roberts shock beam due to time restraints and I'm glad I did its a lovely piece of work. The ARB is my own design anchored off the strengthened chassis. Theres's also one at the front straight through the crossover bar which holds the front end body work.

Cheers Dave

Tony250w
Posts: 25
Joined: Sun Feb 14, 2016 11:54 am
Location: Leicestershire

Re: Fancy a 6 Speed Gearbox? here's how

Post by Tony250w »

Dave

Also slightly off topic but very interested in your front ARB as Roberts is too low and keeps catching on the road. Any chance of pictures or more info
Many thanks
Tony

DaveM
Posts: 75
Joined: Thu Oct 27, 2016 3:36 pm
Location: Haslemere, UK

Re: Fancy a 6 Speed Gearbox? here's how

Post by DaveM »

The ARB I used was from a Peugeot 405 (part no. 5170.65) with 19mm outside diameter, however any straight bar of that diameter allowing 850mm in total length would do. I first tried with manganese bar, but the heat treatment after machining was too much, so I stuck with a pre-made bar and was careful about what heat I added into it, i.e; hacksaw to length and file the square on. The bushes are from Delrin bar machined to suit required sizes. Levers are 20mm Ali' plate with centre of square to outside hole 200mm, reducing at 30mm spacings. I'm running mine at 170mm between centres which gives thereabouts 230 Llbs/in of torsional stiffness which seems spot on.
1.jpg
4.jpg
3.jpg
2.jpg
Hope that helps

Cheers Dave

Tony250w
Posts: 25
Joined: Sun Feb 14, 2016 11:54 am
Location: Leicestershire

Re: Fancy a 6 Speed Gearbox? here's how

Post by Tony250w »

Many thanks and clearly described. Cheers Tony

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